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fix messages and library checking
This commit is contained in:
David MacKenzie
parent
53b55a54e2
commit
db6c43083e
1
NEWS
1
NEWS
@ -21,6 +21,7 @@ Major changes in release 2.0:
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configure --verbose no longer has any effect.
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* AC_PREFIX_PROGRAM, which obsoletes AC_PREFIX.
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* AC_HEADER_DIRENT, which obsoletes AC_DIR_HEADER.
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* AC_CHECK_LIB, which obsoletes AC_HAVE_LIBRARY.
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* AC_ARG_ENABLE and AC_ARG_WITH, which obsolete AC_ENABLE and AC_WITH.
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* AC_SUBST_FILE, to insert one file into another.
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58
acgeneral.m4
58
acgeneral.m4
@ -756,7 +756,7 @@ fi
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for ac_site_dir in $ac_site_dirs; do
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ac_site_file=$ac_site_dir/lib/config.site
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if test -r "$ac_site_file"; then
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echo "loading site initialization script $ac_site_file"
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echo "loading site script $ac_site_file"
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. $ac_site_file
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fi
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done
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@ -764,16 +764,16 @@ done
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dnl
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define(AC_CACHE_LOAD,
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[if test -r "$cache_file"; then
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echo "loading test results from cache file $cache_file"
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echo "loading cache $cache_file"
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. $cache_file
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else
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echo "creating new cache file $cache_file"
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echo "creating cache $cache_file"
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> $cache_file
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fi])dnl
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dnl
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define(AC_CACHE_SAVE,
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[if test -w $cache_file; then
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echo "saving test results in cache file $cache_file"
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echo "updating cache $cache_file"
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cat > $cache_file <<\CEOF
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# This file is a shell script that caches the results of configure
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# tests run on this system so they can be shared between configure
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@ -798,7 +798,7 @@ dnl
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dnl AC_CACHE_VAL(CACHE-ID, COMMANDS-TO-SET-IT)
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dnl The name of shell var CACHE-ID must contain `_cv_' in order to get saved.
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define(AC_CACHE_VAL,
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[AC_REQUIRE([AC_MSG_ECHO_N])dnl
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[AC_REQUIRE([AC_PROG_ECHO_N])dnl
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dnl We used to use the below line, but it fails if the 1st arg is a
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dnl shell variable, so we need the eval.
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dnl if test "${$1+set}" = set; then
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@ -932,37 +932,20 @@ dnl
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dnl ### Printing messages
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dnl
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dnl
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dnl Check whether to use -n, \c, or newline-tab to separate
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dnl checking messages from result messages.
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define(AC_MSG_ECHO_N,
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[AC_PROVIDE([$0])dnl
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if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
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if (echo -n testing; echo 1,2,3) | grep -e -n > /dev/null; then
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ac_n= ac_c='
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' ac_t=' '
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else
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ac_n=-n ac_c= ac_t=
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fi
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else
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ac_n= ac_c='\c' ac_t=
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fi])dnl
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dnl
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dnl AC_MSG_CHECKING(FEATURE-DESCRIPTION)
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define(AC_MSG_CHECKING,
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[AC_REQUIRE([AC_MSG_ECHO_N])dnl
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echo $ac_n "checking $1""...$ac_c" 1>&4])dnl
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[AC_REQUIRE([AC_PROG_ECHO_N])dnl
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echo $ac_n "checking $1""... $ac_c" 1>&4])dnl
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dnl
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dnl Obsolete version.
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define(AC_CHECKING,
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[AC_OBSOLETE([$0], [; instead use AC_MSG_CHECKING])dnl
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echo "checking $1" 1>&4])dnl
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dnl
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dnl AC_MSG_RESULT(RESULT-DESCRIPTION)
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define(AC_MSG_RESULT,
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[AC_REQUIRE([AC_MSG_ECHO_N])dnl
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[AC_REQUIRE([AC_PROG_ECHO_N])dnl
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echo "$ac_t""$1" 1>&4])dnl
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dnl
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dnl Obsolete version.
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define(AC_VERBOSE,
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[AC_OBSOLETE([$0], [; instead use AC_MSG_RESULT])dnl
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echo " $1" 1>&4])dnl
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@ -1115,10 +1098,10 @@ done
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ifelse([$3], , , [test -n "[$]$1" || $1="$3"
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])])dnl
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dnl
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dnl AC_CHECK_LIB(LIBRARY [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
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dnl AC_CHECK_LIB(LIBRARY, FUNCTION, [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
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dnl [, OTHER-LIBRARIES]]])
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define(AC_CHECK_LIB, [dnl
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changequote(/, /)dnl
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define(AC_CHECK_LIB,
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[changequote(/, /)dnl
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define(/AC_LIB_NAME/, dnl
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patsubst(patsubst($1, /lib\([^\.]*\)\.a/, /\1/), /-l/, //))dnl
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define(/AC_CV_NAME/, ac_cv_lib_//AC_LIB_NAME)dnl
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@ -1126,24 +1109,31 @@ changequote([, ])dnl
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AC_MSG_CHECKING([for -l[]AC_LIB_NAME])
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AC_CACHE_VAL(AC_CV_NAME,
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[ac_save_LIBS="${LIBS}"
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LIBS="${LIBS} -l[]AC_LIB_NAME[] $4"
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AC_TRY_LINK( , [main();], AC_CV_NAME=yes, AC_CV_NAME=no)dnl
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LIBS="${LIBS} -l[]AC_LIB_NAME[] $5"
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AC_TRY_LINK( , [$2()], AC_CV_NAME=yes, AC_CV_NAME=no)dnl
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LIBS="${ac_save_LIBS}"
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])dnl
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AC_MSG_RESULT($AC_CV_NAME)
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if test "${AC_CV_NAME}" = yes; then
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ifelse([$2], ,
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ifelse([$3], ,
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[AC_DEFINE([HAVE_LIB]translit(AC_LIB_NAME, [a-z], [A-Z]))
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LIBS="${LIBS} -l[]AC_LIB_NAME[]"
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], [$2])
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ifelse([$3], , , [else
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$3
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], [$3])
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ifelse([$4], , , [else
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$4
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])dnl
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fi
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undefine(AC_LIB_NAME)dnl
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undefine(AC_CV_NAME)dnl
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])dnl
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dnl
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dnl AC_HAVE_LIBRARY(LIBRARY, [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
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dnl [, OTHER-LIBRARIES]]])
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define(AC_HAVE_LIBRARY,
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[AC_OBSOLETE([$0], [; instead use AC_CHECK_LIB])dnl
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AC_CHECK_LIB([$1], main, [$2], [$3], [$4])dnl
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])dnl
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dnl
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dnl
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dnl ### Checking for C features - fundamental (no caching)
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dnl
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@ -24,6 +24,23 @@ dnl
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dnl ### Checks for programs
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dnl
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dnl
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dnl Check whether to use -n, \c, or newline-tab to separate
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dnl checking messages from result messages.
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dnl Idea borrowed from dist 3.0.
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dnl Internal use only.
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define(AC_PROG_ECHO_N,
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[AC_PROVIDE([$0])dnl
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if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
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if (echo -n testing; echo 1,2,3) | grep -e -n > /dev/null; then
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ac_n= ac_c='
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' ac_t=' '
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else
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ac_n=-n ac_c= ac_t=
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fi
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else
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ac_n= ac_c='\c' ac_t=
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fi])dnl
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dnl
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define(AC_PROG_CC,
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[AC_BEFORE([$0], [AC_PROG_CPP])dnl
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AC_PROVIDE([$0])dnl
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@ -213,7 +230,7 @@ AC_MSG_CHECKING(for $LEX library)
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if test -z "$LEXLIB"
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then
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case "$LEX" in
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flex*) AC_CHECK_LIB(fl, LEXLIB="-lfl") ;;
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flex*) AC_CHECK_LIB(fl, main, LEXLIB="-lfl") ;;
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*) LEXLIB="-ll" ;;
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esac
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fi
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@ -953,15 +970,15 @@ AC_SUBST(NEED_SETGID)dnl
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ac_have_func=no
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# Check for the 4.4BSD definition of getloadavg.
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AC_CHECK_LIB(util, [LIBS="$LIBS -lutil" ac_have_func=yes
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AC_CHECK_LIB(util, getloadavg, [LIBS="$LIBS -lutil" ac_have_func=yes
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# Some systems with -lutil have (and need) -lkvm as well, some do not.
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AC_CHECK_LIB(kvm, LIBS="$LIBS -lkvm")])
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AC_CHECK_LIB(kvm, kvm_open, LIBS="$LIBS -lkvm")])
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if test $ac_have_func = no; then
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# There is a commonly available library for RS/6000 AIX.
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# Since it is not a standard part of AIX, it might be installed locally.
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ac_save_LIBS="$LIBS" LIBS="-L/usr/local/lib $LIBS"
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AC_CHECK_LIB(getloadavg, LIBS="$LIBS -lgetloadavg", LIBS="$ac_save_LIBS")
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AC_CHECK_LIB(getloadavg, getloadavg, LIBS="$LIBS -lgetloadavg", LIBS="$ac_save_LIBS")
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fi
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# Make sure it is really in the library, if we think we found it.
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@ -973,15 +990,14 @@ else
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ac_have_func=no
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AC_CHECK_HEADER(sys/dg_sys_info.h,
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[ac_have_func=yes AC_DEFINE(DGUX)
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# Some versions of DGUX need -ldgc for dg_sys_info.
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AC_CHECK_LIB(dgc)])
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AC_CHECK_LIB(dgc, dg_sys_info)])
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if test $ac_have_func = no; then
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# We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
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# uses stabs), but it is still SVR4. We cannot check for <elf.h> because
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# Irix 4.0.5F has the header but not the library.
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AC_CHECK_LIB(elf,
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AC_CHECK_LIB(elf, elf_read,
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[LIBS="$LIBS -lelf" ac_have_func=yes AC_DEFINE(SVR4)
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AC_CHECK_LIB(kvm, LIBS="$LIBS -lkvm")])
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AC_CHECK_LIB(kvm, kvm_open, LIBS="$LIBS -lkvm")])
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fi
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if test $ac_have_func = no; then
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AC_CHECK_HEADER(inq_stats/cpustats.h,
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@ -1547,9 +1563,9 @@ dnl
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dnl Internal subroutine of AC_PATH_X.
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define(AC_PATH_X_DIRECT,
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[AC_CHECKING(for X include and library files directly)
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test -z "$x_direct_TRY_library" && x_direct_TRY_library=Xt
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test -z "$x_direct_TRY_include" && x_direct_TRY_include=X11/Intrinsic.h
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AC_TRY_CPP([#include <$x_direct_TRY_include>], no_x=,
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test -z "$x_direct_test_library" && x_direct_test_library=Xt
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test -z "$x_direct_test_include" && x_direct_test_include=X11/Intrinsic.h
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AC_TRY_CPP([#include <$x_direct_test_include>], no_x=,
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for ac_dir in \
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/usr/X11R6/include \
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/usr/X11R5/include \
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@ -1587,7 +1603,7 @@ AC_TRY_CPP([#include <$x_direct_TRY_include>], no_x=,
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/usr/openwin/share/include \
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; \
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do
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if test -r "$ac_dir/$x_direct_TRY_include"; then
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if test -r "$ac_dir/$x_direct_test_include"; then
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test -z "$ac_cv_x_includes" && ac_cv_x_includes=$ac_dir
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no_x=
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break
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@ -1596,7 +1612,7 @@ AC_TRY_CPP([#include <$x_direct_TRY_include>], no_x=,
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# Check for the libraries. First see if replacing the include by
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# lib works.
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AC_CHECK_LIB("$x_direct_TRY_library", no_x=,
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AC_HAVE_LIBRARY("$x_direct_test_library", no_x=,
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for ac_dir in `echo "$ac_cv_x_includes" | sed s/include/lib/` \
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/usr/X11R6/lib \
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/usr/X11R5/lib \
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@ -1635,7 +1651,7 @@ for ac_dir in `echo "$ac_cv_x_includes" | sed s/include/lib/` \
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; \
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do
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for ac_extension in a so sl; do
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if test -r $ac_dir/lib${x_direct_TRY_library}.$ac_extension; then
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if test -r $ac_dir/lib${x_direct_test_library}.$ac_extension; then
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test -z "$ac_cv_x_libraries" && ac_cv_x_libraries=$ac_dir
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no_x=
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break 2
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@ -1674,16 +1690,17 @@ else
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# Martyn.Johnson@cl.cam.ac.uk says this is needed for Ultrix, if the X
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# libraries were built with DECnet support. And karl@cs.umb.edu says
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# the Alpha needs dnet_stub (dnet does not exist).
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AC_CHECK_LIB(dnet,
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AC_CHECK_LIB(dnet, dnet_ntoa,
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[X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet" ac_have_dnet=yes], ac_have_dnet=no)
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if test "$ac_have_dnet" = no; then
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AC_CHECK_LIB(dnet_stub, [X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet_stub"])
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AC_CHECK_LIB(dnet_stub, dnet_ntoa,
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[X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet_stub"])
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fi
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# lieder@skyler.mavd.honeywell.com says without -lsocket,
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# socket/setsockopt and other routines are undefined under SCO ODT 2.0.
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# But -lsocket is broken on IRIX, according to simon@lia.di.epfl.ch.
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if test "`(uname) 2>/dev/null`" != IRIX; then
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AC_CHECK_LIB(socket, [X_EXTRA_LIBS="$X_EXTRA_LIBS -lsocket"])
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AC_CHECK_LIB(socket, socket, [X_EXTRA_LIBS="$X_EXTRA_LIBS -lsocket"])
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fi
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fi
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#
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@ -1766,13 +1783,13 @@ fi
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])dnl
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dnl
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define(AC_OS_SCO,
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[AC_CHECK_LIB(intl, LIBS="$LIBS -lintl")
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[AC_CHECK_LIB(intl, strftime, LIBS="$LIBS -lintl")
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])dnl
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dnl
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define(AC_OS_IRIX,
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[AC_CHECK_LIB(sun, LIBS="$LIBS -lsun")
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[AC_CHECK_LIB(sun, getmntent, LIBS="$LIBS -lsun")
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])dnl
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dnl
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define(AC_OS_DYNIX,
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[AC_CHECK_LIB(seq, LIBS="$LIBS -lseq")
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[AC_CHECK_LIB(seq, getmntent, LIBS="$LIBS -lseq")
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])dnl
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@ -1904,18 +1904,21 @@ produces this in @file{configure}:
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These macros check whether particular files exist.
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@defmac AC_CHECK_LIB (@var{library} @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
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@defmac AC_CHECK_LIB (@var{library}, @var{function}, @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
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@maindex CHECK_LIB
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Create a test C program to see whether that program can be linked with
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the library @var{library}. @var{action-if-found} is a list of shell
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commands to run if the link succeeds (which means that the library is
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present); @var{action-if-not-found} is a list of shell commands to run
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if the link fails. If @var{action-if-found} and
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@var{action-if-not-found} are not specified, the default action is to
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add @samp{-lfoo} to @code{LIBS} and define @samp{HAVE_LIBfoo}
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for library @samp{foo}. @var{library} can be written as any of
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@samp{foo}, @samp{-lfoo}, or @samp{libfoo.a}. In all of those cases,
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the compiler is passed @samp{-lfoo}.
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the library @var{library}. @var{function} should be the name of a
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function that that library contains, to force the linker to try to link
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with the library to resolve the name.
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@var{action-if-found} is a list of shell commands to run if the link
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succeeds (which means that the library is present);
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@var{action-if-not-found} is a list of shell commands to run if the link
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fails. If @var{action-if-found} and @var{action-if-not-found} are not
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specified, the default action is to add @samp{-lfoo} to @code{LIBS} and
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define @samp{HAVE_LIBfoo} for library @samp{foo}. @var{library} can be
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written as any of @samp{foo}, @samp{-lfoo}, or @samp{libfoo.a}. In all
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of those cases, the compiler is passed @samp{-lfoo}.
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If linking with @var{library} results in unresolved symbols, which would
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be resolved by linking with additional libraries, give those libraries
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@ -1925,6 +1928,14 @@ present, because linking the test program will always fail with
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unresolved symbols.
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@end defmac
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@defmac AC_HAVE_LIBRARY (@var{library}, @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
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@maindex HAVE_LIBRARY
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This macro is equivalent to calling @code{AC_CHECK_LIB} with a
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@var{function} argument of @code{main}. It is considered obsolete,
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because some linkers (e.g., Apollo's) do not fail when asked to link
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with a nonexistent library if there are no unresolved sybols.
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@end defmac
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@defmac AC_PREFIX (@var{program})
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@maindex PREFIX
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This macro is like @code{AC_PREFIX_PROGRAM}, except that it prevents
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@ -2087,7 +2098,8 @@ shell commands @var{action-if-false}.
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This macro calls @code{AC_PROG_CPP} or @code{AC_PROG_CXXCPP} (depending
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on which language is current, @pxref{Language Choice}), if it hasn't
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been called already.
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been called already. It does not use @code{CFLAGS}, because -g, -O,
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etc. are not valid options to many C preprocessors.
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@end defmac
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@defmac AC_TRY_LINK (@var{includes}, @var{function-body}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
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@ -2096,7 +2108,9 @@ Create a test C program to see whether a function whose body consists of
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@var{function-body} can be compiled and linked; @var{includes} is any
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@code{#include} statements needed by the code in @var{function-body}.
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If the file compiles and links successfully, run shell commands
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@var{action-if-found}, otherwise run @var{action-if-not-found}.
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@var{action-if-found}, otherwise run @var{action-if-not-found}. This
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macro uses @code{CFLAGS} and @code{LDFLAGS} and @code{LIBS} when
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compiling.
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@end defmac
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|
||||
@defmac AC_TRY_RUN (@var{program}, @var{action-if-true} @r{[}, @var{action-if-false} @r{[}, @var{action-if-cross-compiling}@r{]]})
|
||||
@ -2105,14 +2119,18 @@ If the file compiles and links successfully, run shell commands
|
||||
backquote substitutions are performed. If it compiles and links
|
||||
successfully and returns an exit status of 0 when executed, run shell
|
||||
commands @var{action-if-true}. Otherwise run shell commands
|
||||
@var{action-if-false}.
|
||||
@var{action-if-false}. This macro uses @code{CFLAGS} and @code{LDFLAGS}
|
||||
and @code{LIBS} when compiling.
|
||||
|
||||
If the optional argument @var{action-if-cross-compiling} is given and
|
||||
the C compiler being used does not produce executables that run on the
|
||||
system where @code{configure} is being run, then the test program is not
|
||||
run. Instead, the shell commands @var{action-if-cross-compiling} are
|
||||
run. If that argument is given, this macro calls @code{AC_C_CROSS}
|
||||
If the C compiler being used does not produce executables that run on
|
||||
the system where @code{configure} is being run, then the test program is
|
||||
not run. If the optional shell commands @var{action-if-cross-compiling}
|
||||
are given, they are run instead and this macro calls @code{AC_C_CROSS}
|
||||
if it has not already been called (@pxref{Compiler Characteristics}).
|
||||
Otherwise, @code{configure} prints an error message and exits.
|
||||
|
||||
It is preferable to use @code{AC_TRY_LINK} instead of @code{AC_TRY_RUN},
|
||||
when possible. @xref{Test Programs}, for more information.
|
||||
@end defmac
|
||||
|
||||
@node Command Line, Setting Variables, C Features, General Purpose Macros
|
||||
@ -2945,7 +2963,7 @@ exists on the system or has a certain value, then you can't use
|
||||
test program by hand. You can compile and run it using
|
||||
@code{AC_TRY_RUN} (@pxref{C Features}).
|
||||
|
||||
Try to avoid writing test programs if possible, because using them
|
||||
Try to avoid running test programs if possible, because using them
|
||||
prevents people from configuring your package for cross-compiling. If
|
||||
it's really best that you test for a run-time behavior, try to provide a
|
||||
default ``worst case'' value to use when cross-compiling makes run-time
|
||||
@ -3477,11 +3495,12 @@ code are really appropriate to be in them. Besides a cache file, they
|
||||
are good places to set default values for other shell variables like
|
||||
@code{CC}, if you need to give them unusual values: anything you would
|
||||
normally do, repetitively, on the command line. If you use non-default
|
||||
values for @var{prefix} or @var{exec_prefix}, you can't set them in the
|
||||
site file, since you have to specify them on the command line in order
|
||||
for @code{configure} to find the site file!
|
||||
values for @var{prefix} or @var{exec_prefix} (wherever you locate the
|
||||
site file), you can't set them in the site file, since you have to
|
||||
specify them on the command line in order for @code{configure} to find
|
||||
the site file!
|
||||
|
||||
In addition, it is possible to set some cache values in the site file.
|
||||
It is possible to set some cache values in the site file.
|
||||
If you are cross-compiling, it is impossible to check features that
|
||||
require running a test program. You could ``prime the cache'' by
|
||||
setting those values correctly for that system in
|
||||
@ -3492,6 +3511,20 @@ check that variables such as @code{prefix} and @code{cache_file} have
|
||||
their default values (as set near the top of @code{configure}) before
|
||||
changing them.
|
||||
|
||||
Here is a sample file @file{/usr/share/local/gnu/lib/config.site}.
|
||||
@samp{configure --prefix=/usr/share/local/gnu} would read this file.
|
||||
|
||||
@example
|
||||
# config.site for configure
|
||||
#
|
||||
# Give Autoconf 2.x generated configure scripts a shared default
|
||||
# cache file for feature test results, architecture-specific.
|
||||
test $cache_file = ./config.cache &&
|
||||
cache_file=/usr/local/gnu/lib/config.cache
|
||||
# Also, if you give --prefix, you get --exec-prefix automatically.
|
||||
test $exec_prefix = NONE && exec_prefix=/usr/local/gnu
|
||||
@end example
|
||||
|
||||
@node Old Macro Names, Example, Site Default Values, Top
|
||||
@chapter Old Macro Names
|
||||
|
||||
@ -3539,10 +3572,6 @@ for backward compatibility, the old names are considered obsolete.
|
||||
@vindex PROGRAMS_PATH
|
||||
@vindex PATH_PROGS
|
||||
@code{AC_PATH_PROGS}
|
||||
@item AC_HAVE_LIBRARY
|
||||
@vindex HAVE_LIBRARY
|
||||
@vindex CHECK_LIB
|
||||
@code{AC_CHECK_LIB}
|
||||
@item AC_HEADER_EGREP
|
||||
@vindex HEADER_EGREP
|
||||
@vindex EGREP_HEADER
|
||||
|
||||
@ -1904,18 +1904,21 @@ produces this in @file{configure}:
|
||||
|
||||
These macros check whether particular files exist.
|
||||
|
||||
@defmac AC_CHECK_LIB (@var{library} @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
|
||||
@defmac AC_CHECK_LIB (@var{library}, @var{function}, @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
|
||||
@maindex CHECK_LIB
|
||||
Create a test C program to see whether that program can be linked with
|
||||
the library @var{library}. @var{action-if-found} is a list of shell
|
||||
commands to run if the link succeeds (which means that the library is
|
||||
present); @var{action-if-not-found} is a list of shell commands to run
|
||||
if the link fails. If @var{action-if-found} and
|
||||
@var{action-if-not-found} are not specified, the default action is to
|
||||
add @samp{-lfoo} to @code{LIBS} and define @samp{HAVE_LIBfoo}
|
||||
for library @samp{foo}. @var{library} can be written as any of
|
||||
@samp{foo}, @samp{-lfoo}, or @samp{libfoo.a}. In all of those cases,
|
||||
the compiler is passed @samp{-lfoo}.
|
||||
the library @var{library}. @var{function} should be the name of a
|
||||
function that that library contains, to force the linker to try to link
|
||||
with the library to resolve the name.
|
||||
|
||||
@var{action-if-found} is a list of shell commands to run if the link
|
||||
succeeds (which means that the library is present);
|
||||
@var{action-if-not-found} is a list of shell commands to run if the link
|
||||
fails. If @var{action-if-found} and @var{action-if-not-found} are not
|
||||
specified, the default action is to add @samp{-lfoo} to @code{LIBS} and
|
||||
define @samp{HAVE_LIBfoo} for library @samp{foo}. @var{library} can be
|
||||
written as any of @samp{foo}, @samp{-lfoo}, or @samp{libfoo.a}. In all
|
||||
of those cases, the compiler is passed @samp{-lfoo}.
|
||||
|
||||
If linking with @var{library} results in unresolved symbols, which would
|
||||
be resolved by linking with additional libraries, give those libraries
|
||||
@ -1925,6 +1928,14 @@ present, because linking the test program will always fail with
|
||||
unresolved symbols.
|
||||
@end defmac
|
||||
|
||||
@defmac AC_HAVE_LIBRARY (@var{library}, @r{[}, @var{action-if-found} @r{[}, @var{action-if-not-found} @r{[}, @var{other-libraries}@r{]]]})
|
||||
@maindex HAVE_LIBRARY
|
||||
This macro is equivalent to calling @code{AC_CHECK_LIB} with a
|
||||
@var{function} argument of @code{main}. It is considered obsolete,
|
||||
because some linkers (e.g., Apollo's) do not fail when asked to link
|
||||
with a nonexistent library if there are no unresolved sybols.
|
||||
@end defmac
|
||||
|
||||
@defmac AC_PREFIX (@var{program})
|
||||
@maindex PREFIX
|
||||
This macro is like @code{AC_PREFIX_PROGRAM}, except that it prevents
|
||||
@ -2087,7 +2098,8 @@ shell commands @var{action-if-false}.
|
||||
|
||||
This macro calls @code{AC_PROG_CPP} or @code{AC_PROG_CXXCPP} (depending
|
||||
on which language is current, @pxref{Language Choice}), if it hasn't
|
||||
been called already.
|
||||
been called already. It does not use @code{CFLAGS}, because -g, -O,
|
||||
etc. are not valid options to many C preprocessors.
|
||||
@end defmac
|
||||
|
||||
@defmac AC_TRY_LINK (@var{includes}, @var{function-body}, @var{action-if-found} @r{[}, @var{action-if-not-found}@r{]})
|
||||
@ -2096,7 +2108,9 @@ Create a test C program to see whether a function whose body consists of
|
||||
@var{function-body} can be compiled and linked; @var{includes} is any
|
||||
@code{#include} statements needed by the code in @var{function-body}.
|
||||
If the file compiles and links successfully, run shell commands
|
||||
@var{action-if-found}, otherwise run @var{action-if-not-found}.
|
||||
@var{action-if-found}, otherwise run @var{action-if-not-found}. This
|
||||
macro uses @code{CFLAGS} and @code{LDFLAGS} and @code{LIBS} when
|
||||
compiling.
|
||||
@end defmac
|
||||
|
||||
@defmac AC_TRY_RUN (@var{program}, @var{action-if-true} @r{[}, @var{action-if-false} @r{[}, @var{action-if-cross-compiling}@r{]]})
|
||||
@ -2105,14 +2119,18 @@ If the file compiles and links successfully, run shell commands
|
||||
backquote substitutions are performed. If it compiles and links
|
||||
successfully and returns an exit status of 0 when executed, run shell
|
||||
commands @var{action-if-true}. Otherwise run shell commands
|
||||
@var{action-if-false}.
|
||||
@var{action-if-false}. This macro uses @code{CFLAGS} and @code{LDFLAGS}
|
||||
and @code{LIBS} when compiling.
|
||||
|
||||
If the optional argument @var{action-if-cross-compiling} is given and
|
||||
the C compiler being used does not produce executables that run on the
|
||||
system where @code{configure} is being run, then the test program is not
|
||||
run. Instead, the shell commands @var{action-if-cross-compiling} are
|
||||
run. If that argument is given, this macro calls @code{AC_C_CROSS}
|
||||
If the C compiler being used does not produce executables that run on
|
||||
the system where @code{configure} is being run, then the test program is
|
||||
not run. If the optional shell commands @var{action-if-cross-compiling}
|
||||
are given, they are run instead and this macro calls @code{AC_C_CROSS}
|
||||
if it has not already been called (@pxref{Compiler Characteristics}).
|
||||
Otherwise, @code{configure} prints an error message and exits.
|
||||
|
||||
It is preferable to use @code{AC_TRY_LINK} instead of @code{AC_TRY_RUN},
|
||||
when possible. @xref{Test Programs}, for more information.
|
||||
@end defmac
|
||||
|
||||
@node Command Line, Setting Variables, C Features, General Purpose Macros
|
||||
@ -2945,7 +2963,7 @@ exists on the system or has a certain value, then you can't use
|
||||
test program by hand. You can compile and run it using
|
||||
@code{AC_TRY_RUN} (@pxref{C Features}).
|
||||
|
||||
Try to avoid writing test programs if possible, because using them
|
||||
Try to avoid running test programs if possible, because using them
|
||||
prevents people from configuring your package for cross-compiling. If
|
||||
it's really best that you test for a run-time behavior, try to provide a
|
||||
default ``worst case'' value to use when cross-compiling makes run-time
|
||||
@ -3477,11 +3495,12 @@ code are really appropriate to be in them. Besides a cache file, they
|
||||
are good places to set default values for other shell variables like
|
||||
@code{CC}, if you need to give them unusual values: anything you would
|
||||
normally do, repetitively, on the command line. If you use non-default
|
||||
values for @var{prefix} or @var{exec_prefix}, you can't set them in the
|
||||
site file, since you have to specify them on the command line in order
|
||||
for @code{configure} to find the site file!
|
||||
values for @var{prefix} or @var{exec_prefix} (wherever you locate the
|
||||
site file), you can't set them in the site file, since you have to
|
||||
specify them on the command line in order for @code{configure} to find
|
||||
the site file!
|
||||
|
||||
In addition, it is possible to set some cache values in the site file.
|
||||
It is possible to set some cache values in the site file.
|
||||
If you are cross-compiling, it is impossible to check features that
|
||||
require running a test program. You could ``prime the cache'' by
|
||||
setting those values correctly for that system in
|
||||
@ -3492,6 +3511,20 @@ check that variables such as @code{prefix} and @code{cache_file} have
|
||||
their default values (as set near the top of @code{configure}) before
|
||||
changing them.
|
||||
|
||||
Here is a sample file @file{/usr/share/local/gnu/lib/config.site}.
|
||||
@samp{configure --prefix=/usr/share/local/gnu} would read this file.
|
||||
|
||||
@example
|
||||
# config.site for configure
|
||||
#
|
||||
# Give Autoconf 2.x generated configure scripts a shared default
|
||||
# cache file for feature test results, architecture-specific.
|
||||
test $cache_file = ./config.cache &&
|
||||
cache_file=/usr/local/gnu/lib/config.cache
|
||||
# Also, if you give --prefix, you get --exec-prefix automatically.
|
||||
test $exec_prefix = NONE && exec_prefix=/usr/local/gnu
|
||||
@end example
|
||||
|
||||
@node Old Macro Names, Example, Site Default Values, Top
|
||||
@chapter Old Macro Names
|
||||
|
||||
@ -3539,10 +3572,6 @@ for backward compatibility, the old names are considered obsolete.
|
||||
@vindex PROGRAMS_PATH
|
||||
@vindex PATH_PROGS
|
||||
@code{AC_PATH_PROGS}
|
||||
@item AC_HAVE_LIBRARY
|
||||
@vindex HAVE_LIBRARY
|
||||
@vindex CHECK_LIB
|
||||
@code{AC_CHECK_LIB}
|
||||
@item AC_HEADER_EGREP
|
||||
@vindex HEADER_EGREP
|
||||
@vindex EGREP_HEADER
|
||||
|
||||
@ -756,7 +756,7 @@ fi
|
||||
for ac_site_dir in $ac_site_dirs; do
|
||||
ac_site_file=$ac_site_dir/lib/config.site
|
||||
if test -r "$ac_site_file"; then
|
||||
echo "loading site initialization script $ac_site_file"
|
||||
echo "loading site script $ac_site_file"
|
||||
. $ac_site_file
|
||||
fi
|
||||
done
|
||||
@ -764,16 +764,16 @@ done
|
||||
dnl
|
||||
define(AC_CACHE_LOAD,
|
||||
[if test -r "$cache_file"; then
|
||||
echo "loading test results from cache file $cache_file"
|
||||
echo "loading cache $cache_file"
|
||||
. $cache_file
|
||||
else
|
||||
echo "creating new cache file $cache_file"
|
||||
echo "creating cache $cache_file"
|
||||
> $cache_file
|
||||
fi])dnl
|
||||
dnl
|
||||
define(AC_CACHE_SAVE,
|
||||
[if test -w $cache_file; then
|
||||
echo "saving test results in cache file $cache_file"
|
||||
echo "updating cache $cache_file"
|
||||
cat > $cache_file <<\CEOF
|
||||
# This file is a shell script that caches the results of configure
|
||||
# tests run on this system so they can be shared between configure
|
||||
@ -798,7 +798,7 @@ dnl
|
||||
dnl AC_CACHE_VAL(CACHE-ID, COMMANDS-TO-SET-IT)
|
||||
dnl The name of shell var CACHE-ID must contain `_cv_' in order to get saved.
|
||||
define(AC_CACHE_VAL,
|
||||
[AC_REQUIRE([AC_MSG_ECHO_N])dnl
|
||||
[AC_REQUIRE([AC_PROG_ECHO_N])dnl
|
||||
dnl We used to use the below line, but it fails if the 1st arg is a
|
||||
dnl shell variable, so we need the eval.
|
||||
dnl if test "${$1+set}" = set; then
|
||||
@ -932,37 +932,20 @@ dnl
|
||||
dnl ### Printing messages
|
||||
dnl
|
||||
dnl
|
||||
dnl Check whether to use -n, \c, or newline-tab to separate
|
||||
dnl checking messages from result messages.
|
||||
define(AC_MSG_ECHO_N,
|
||||
[AC_PROVIDE([$0])dnl
|
||||
if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
|
||||
if (echo -n testing; echo 1,2,3) | grep -e -n > /dev/null; then
|
||||
ac_n= ac_c='
|
||||
' ac_t=' '
|
||||
else
|
||||
ac_n=-n ac_c= ac_t=
|
||||
fi
|
||||
else
|
||||
ac_n= ac_c='\c' ac_t=
|
||||
fi])dnl
|
||||
dnl
|
||||
dnl AC_MSG_CHECKING(FEATURE-DESCRIPTION)
|
||||
define(AC_MSG_CHECKING,
|
||||
[AC_REQUIRE([AC_MSG_ECHO_N])dnl
|
||||
echo $ac_n "checking $1""...$ac_c" 1>&4])dnl
|
||||
[AC_REQUIRE([AC_PROG_ECHO_N])dnl
|
||||
echo $ac_n "checking $1""... $ac_c" 1>&4])dnl
|
||||
dnl
|
||||
dnl Obsolete version.
|
||||
define(AC_CHECKING,
|
||||
[AC_OBSOLETE([$0], [; instead use AC_MSG_CHECKING])dnl
|
||||
echo "checking $1" 1>&4])dnl
|
||||
dnl
|
||||
dnl AC_MSG_RESULT(RESULT-DESCRIPTION)
|
||||
define(AC_MSG_RESULT,
|
||||
[AC_REQUIRE([AC_MSG_ECHO_N])dnl
|
||||
[AC_REQUIRE([AC_PROG_ECHO_N])dnl
|
||||
echo "$ac_t""$1" 1>&4])dnl
|
||||
dnl
|
||||
dnl Obsolete version.
|
||||
define(AC_VERBOSE,
|
||||
[AC_OBSOLETE([$0], [; instead use AC_MSG_RESULT])dnl
|
||||
echo " $1" 1>&4])dnl
|
||||
@ -1115,10 +1098,10 @@ done
|
||||
ifelse([$3], , , [test -n "[$]$1" || $1="$3"
|
||||
])])dnl
|
||||
dnl
|
||||
dnl AC_CHECK_LIB(LIBRARY [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
|
||||
dnl AC_CHECK_LIB(LIBRARY, FUNCTION, [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
|
||||
dnl [, OTHER-LIBRARIES]]])
|
||||
define(AC_CHECK_LIB, [dnl
|
||||
changequote(/, /)dnl
|
||||
define(AC_CHECK_LIB,
|
||||
[changequote(/, /)dnl
|
||||
define(/AC_LIB_NAME/, dnl
|
||||
patsubst(patsubst($1, /lib\([^\.]*\)\.a/, /\1/), /-l/, //))dnl
|
||||
define(/AC_CV_NAME/, ac_cv_lib_//AC_LIB_NAME)dnl
|
||||
@ -1126,24 +1109,31 @@ changequote([, ])dnl
|
||||
AC_MSG_CHECKING([for -l[]AC_LIB_NAME])
|
||||
AC_CACHE_VAL(AC_CV_NAME,
|
||||
[ac_save_LIBS="${LIBS}"
|
||||
LIBS="${LIBS} -l[]AC_LIB_NAME[] $4"
|
||||
AC_TRY_LINK( , [main();], AC_CV_NAME=yes, AC_CV_NAME=no)dnl
|
||||
LIBS="${LIBS} -l[]AC_LIB_NAME[] $5"
|
||||
AC_TRY_LINK( , [$2()], AC_CV_NAME=yes, AC_CV_NAME=no)dnl
|
||||
LIBS="${ac_save_LIBS}"
|
||||
])dnl
|
||||
AC_MSG_RESULT($AC_CV_NAME)
|
||||
if test "${AC_CV_NAME}" = yes; then
|
||||
ifelse([$2], ,
|
||||
ifelse([$3], ,
|
||||
[AC_DEFINE([HAVE_LIB]translit(AC_LIB_NAME, [a-z], [A-Z]))
|
||||
LIBS="${LIBS} -l[]AC_LIB_NAME[]"
|
||||
], [$2])
|
||||
ifelse([$3], , , [else
|
||||
$3
|
||||
], [$3])
|
||||
ifelse([$4], , , [else
|
||||
$4
|
||||
])dnl
|
||||
fi
|
||||
undefine(AC_LIB_NAME)dnl
|
||||
undefine(AC_CV_NAME)dnl
|
||||
])dnl
|
||||
dnl
|
||||
dnl AC_HAVE_LIBRARY(LIBRARY, [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND
|
||||
dnl [, OTHER-LIBRARIES]]])
|
||||
define(AC_HAVE_LIBRARY,
|
||||
[AC_OBSOLETE([$0], [; instead use AC_CHECK_LIB])dnl
|
||||
AC_CHECK_LIB([$1], main, [$2], [$3], [$4])dnl
|
||||
])dnl
|
||||
dnl
|
||||
dnl
|
||||
dnl ### Checking for C features - fundamental (no caching)
|
||||
dnl
|
||||
|
||||
@ -24,6 +24,23 @@ dnl
|
||||
dnl ### Checks for programs
|
||||
dnl
|
||||
dnl
|
||||
dnl Check whether to use -n, \c, or newline-tab to separate
|
||||
dnl checking messages from result messages.
|
||||
dnl Idea borrowed from dist 3.0.
|
||||
dnl Internal use only.
|
||||
define(AC_PROG_ECHO_N,
|
||||
[AC_PROVIDE([$0])dnl
|
||||
if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
|
||||
if (echo -n testing; echo 1,2,3) | grep -e -n > /dev/null; then
|
||||
ac_n= ac_c='
|
||||
' ac_t=' '
|
||||
else
|
||||
ac_n=-n ac_c= ac_t=
|
||||
fi
|
||||
else
|
||||
ac_n= ac_c='\c' ac_t=
|
||||
fi])dnl
|
||||
dnl
|
||||
define(AC_PROG_CC,
|
||||
[AC_BEFORE([$0], [AC_PROG_CPP])dnl
|
||||
AC_PROVIDE([$0])dnl
|
||||
@ -213,7 +230,7 @@ AC_MSG_CHECKING(for $LEX library)
|
||||
if test -z "$LEXLIB"
|
||||
then
|
||||
case "$LEX" in
|
||||
flex*) AC_CHECK_LIB(fl, LEXLIB="-lfl") ;;
|
||||
flex*) AC_CHECK_LIB(fl, main, LEXLIB="-lfl") ;;
|
||||
*) LEXLIB="-ll" ;;
|
||||
esac
|
||||
fi
|
||||
@ -953,15 +970,15 @@ AC_SUBST(NEED_SETGID)dnl
|
||||
ac_have_func=no
|
||||
|
||||
# Check for the 4.4BSD definition of getloadavg.
|
||||
AC_CHECK_LIB(util, [LIBS="$LIBS -lutil" ac_have_func=yes
|
||||
AC_CHECK_LIB(util, getloadavg, [LIBS="$LIBS -lutil" ac_have_func=yes
|
||||
# Some systems with -lutil have (and need) -lkvm as well, some do not.
|
||||
AC_CHECK_LIB(kvm, LIBS="$LIBS -lkvm")])
|
||||
AC_CHECK_LIB(kvm, kvm_open, LIBS="$LIBS -lkvm")])
|
||||
|
||||
if test $ac_have_func = no; then
|
||||
# There is a commonly available library for RS/6000 AIX.
|
||||
# Since it is not a standard part of AIX, it might be installed locally.
|
||||
ac_save_LIBS="$LIBS" LIBS="-L/usr/local/lib $LIBS"
|
||||
AC_CHECK_LIB(getloadavg, LIBS="$LIBS -lgetloadavg", LIBS="$ac_save_LIBS")
|
||||
AC_CHECK_LIB(getloadavg, getloadavg, LIBS="$LIBS -lgetloadavg", LIBS="$ac_save_LIBS")
|
||||
fi
|
||||
|
||||
# Make sure it is really in the library, if we think we found it.
|
||||
@ -973,15 +990,14 @@ else
|
||||
ac_have_func=no
|
||||
AC_CHECK_HEADER(sys/dg_sys_info.h,
|
||||
[ac_have_func=yes AC_DEFINE(DGUX)
|
||||
# Some versions of DGUX need -ldgc for dg_sys_info.
|
||||
AC_CHECK_LIB(dgc)])
|
||||
AC_CHECK_LIB(dgc, dg_sys_info)])
|
||||
if test $ac_have_func = no; then
|
||||
# We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
|
||||
# uses stabs), but it is still SVR4. We cannot check for <elf.h> because
|
||||
# Irix 4.0.5F has the header but not the library.
|
||||
AC_CHECK_LIB(elf,
|
||||
AC_CHECK_LIB(elf, elf_read,
|
||||
[LIBS="$LIBS -lelf" ac_have_func=yes AC_DEFINE(SVR4)
|
||||
AC_CHECK_LIB(kvm, LIBS="$LIBS -lkvm")])
|
||||
AC_CHECK_LIB(kvm, kvm_open, LIBS="$LIBS -lkvm")])
|
||||
fi
|
||||
if test $ac_have_func = no; then
|
||||
AC_CHECK_HEADER(inq_stats/cpustats.h,
|
||||
@ -1547,9 +1563,9 @@ dnl
|
||||
dnl Internal subroutine of AC_PATH_X.
|
||||
define(AC_PATH_X_DIRECT,
|
||||
[AC_CHECKING(for X include and library files directly)
|
||||
test -z "$x_direct_TRY_library" && x_direct_TRY_library=Xt
|
||||
test -z "$x_direct_TRY_include" && x_direct_TRY_include=X11/Intrinsic.h
|
||||
AC_TRY_CPP([#include <$x_direct_TRY_include>], no_x=,
|
||||
test -z "$x_direct_test_library" && x_direct_test_library=Xt
|
||||
test -z "$x_direct_test_include" && x_direct_test_include=X11/Intrinsic.h
|
||||
AC_TRY_CPP([#include <$x_direct_test_include>], no_x=,
|
||||
for ac_dir in \
|
||||
/usr/X11R6/include \
|
||||
/usr/X11R5/include \
|
||||
@ -1587,7 +1603,7 @@ AC_TRY_CPP([#include <$x_direct_TRY_include>], no_x=,
|
||||
/usr/openwin/share/include \
|
||||
; \
|
||||
do
|
||||
if test -r "$ac_dir/$x_direct_TRY_include"; then
|
||||
if test -r "$ac_dir/$x_direct_test_include"; then
|
||||
test -z "$ac_cv_x_includes" && ac_cv_x_includes=$ac_dir
|
||||
no_x=
|
||||
break
|
||||
@ -1596,7 +1612,7 @@ AC_TRY_CPP([#include <$x_direct_TRY_include>], no_x=,
|
||||
|
||||
# Check for the libraries. First see if replacing the include by
|
||||
# lib works.
|
||||
AC_CHECK_LIB("$x_direct_TRY_library", no_x=,
|
||||
AC_HAVE_LIBRARY("$x_direct_test_library", no_x=,
|
||||
for ac_dir in `echo "$ac_cv_x_includes" | sed s/include/lib/` \
|
||||
/usr/X11R6/lib \
|
||||
/usr/X11R5/lib \
|
||||
@ -1635,7 +1651,7 @@ for ac_dir in `echo "$ac_cv_x_includes" | sed s/include/lib/` \
|
||||
; \
|
||||
do
|
||||
for ac_extension in a so sl; do
|
||||
if test -r $ac_dir/lib${x_direct_TRY_library}.$ac_extension; then
|
||||
if test -r $ac_dir/lib${x_direct_test_library}.$ac_extension; then
|
||||
test -z "$ac_cv_x_libraries" && ac_cv_x_libraries=$ac_dir
|
||||
no_x=
|
||||
break 2
|
||||
@ -1674,16 +1690,17 @@ else
|
||||
# Martyn.Johnson@cl.cam.ac.uk says this is needed for Ultrix, if the X
|
||||
# libraries were built with DECnet support. And karl@cs.umb.edu says
|
||||
# the Alpha needs dnet_stub (dnet does not exist).
|
||||
AC_CHECK_LIB(dnet,
|
||||
AC_CHECK_LIB(dnet, dnet_ntoa,
|
||||
[X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet" ac_have_dnet=yes], ac_have_dnet=no)
|
||||
if test "$ac_have_dnet" = no; then
|
||||
AC_CHECK_LIB(dnet_stub, [X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet_stub"])
|
||||
AC_CHECK_LIB(dnet_stub, dnet_ntoa,
|
||||
[X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet_stub"])
|
||||
fi
|
||||
# lieder@skyler.mavd.honeywell.com says without -lsocket,
|
||||
# socket/setsockopt and other routines are undefined under SCO ODT 2.0.
|
||||
# But -lsocket is broken on IRIX, according to simon@lia.di.epfl.ch.
|
||||
if test "`(uname) 2>/dev/null`" != IRIX; then
|
||||
AC_CHECK_LIB(socket, [X_EXTRA_LIBS="$X_EXTRA_LIBS -lsocket"])
|
||||
AC_CHECK_LIB(socket, socket, [X_EXTRA_LIBS="$X_EXTRA_LIBS -lsocket"])
|
||||
fi
|
||||
fi
|
||||
#
|
||||
@ -1766,13 +1783,13 @@ fi
|
||||
])dnl
|
||||
dnl
|
||||
define(AC_OS_SCO,
|
||||
[AC_CHECK_LIB(intl, LIBS="$LIBS -lintl")
|
||||
[AC_CHECK_LIB(intl, strftime, LIBS="$LIBS -lintl")
|
||||
])dnl
|
||||
dnl
|
||||
define(AC_OS_IRIX,
|
||||
[AC_CHECK_LIB(sun, LIBS="$LIBS -lsun")
|
||||
[AC_CHECK_LIB(sun, getmntent, LIBS="$LIBS -lsun")
|
||||
])dnl
|
||||
dnl
|
||||
define(AC_OS_DYNIX,
|
||||
[AC_CHECK_LIB(seq, LIBS="$LIBS -lseq")
|
||||
[AC_CHECK_LIB(seq, getmntent, LIBS="$LIBS -lseq")
|
||||
])dnl
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user