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b21c569cea
Peter Eisentraut noted that commit 40b9f1921 had broken a configure
behavior that some people might rely on: AC_CHECK_PROGS(FOO,...) will
allow the search to be overridden by specifying a value for FOO on
configure's command line or in its environment, but AC_PATH_PROGS(FOO,...)
accepts such an override only if it's an absolute path. We had worked
around that behavior for some, but not all, of the pre-existing uses
of AC_PATH_PROGS by just skipping the macro altogether when FOO is
already set. Let's standardize on that workaround for all uses of
AC_PATH_PROGS, new and pre-existing, by wrapping AC_PATH_PROGS in a
new macro PGAC_PATH_PROGS. While at it, fix a deficiency of the old
workaround code by making sure we report the setting to configure's log.
Eventually I'd like to improve PGAC_PATH_PROGS so that it converts
non-absolute override inputs to absolute form, eg "PYTHON=python3"
becomes, say, PYTHON = /usr/bin/python3. But that will take some
nontrivial coding so it doesn't seem like a thing to do in late beta.
Discussion: https://postgr.es/m/90a92a7d-938e-507a-3bd7-ecd2b4004689@2ndquadrant.com
294 lines
9.3 KiB
Plaintext
294 lines
9.3 KiB
Plaintext
# config/programs.m4
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# PGAC_PATH_PROGS
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# ---------------
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# This wrapper for AC_PATH_PROGS behaves like that macro except when
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# VARIABLE is already set; in that case we just accept the value verbatim.
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# (AC_PATH_PROGS would accept it only if it looks like an absolute path.)
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# A desirable future improvement would be to convert a non-absolute-path
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# input into absolute form.
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AC_DEFUN([PGAC_PATH_PROGS],
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[if test -z "$$1"; then
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AC_PATH_PROGS($@)
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else
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# Report the value of $1 in configure's output in all cases.
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AC_MSG_CHECKING([for $1])
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AC_MSG_RESULT([$$1])
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fi
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])
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# PGAC_PATH_BISON
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# ---------------
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# Look for Bison, set the output variable BISON to its path if found.
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# Reject versions before 1.875 (they have bugs or capacity limits).
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# Note we do not accept other implementations of yacc.
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AC_DEFUN([PGAC_PATH_BISON],
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[PGAC_PATH_PROGS(BISON, bison)
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if test "$BISON"; then
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pgac_bison_version=`$BISON --version 2>/dev/null | sed q`
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AC_MSG_NOTICE([using $pgac_bison_version])
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if echo "$pgac_bison_version" | $AWK '{ if ([$]4 < 1.875) exit 0; else exit 1;}'
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then
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AC_MSG_WARN([
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*** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
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*** Bison version 1.875 or later is required, but this is $pgac_bison_version.])
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BISON=""
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fi
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# Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
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# of the now preferred %name-prefix "base_yy", but the latter
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# doesn't work with Bison 2.3 or less. So for now we silence the
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# deprecation warnings.
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if echo "$pgac_bison_version" | $AWK '{ if ([$]4 >= 3) exit 0; else exit 1;}'
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then
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BISONFLAGS="$BISONFLAGS -Wno-deprecated"
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fi
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fi
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if test -z "$BISON"; then
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AC_MSG_WARN([
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*** Without Bison you will not be able to build PostgreSQL from Git nor
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*** change any of the parser definition files. You can obtain Bison from
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*** a GNU mirror site. (If you are using the official distribution of
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*** PostgreSQL then you do not need to worry about this, because the Bison
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*** output is pre-generated.)])
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fi
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# We don't need AC_SUBST(BISON) because PGAC_PATH_PROGS did it
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AC_SUBST(BISONFLAGS)
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])# PGAC_PATH_BISON
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# PGAC_PATH_FLEX
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# --------------
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# Look for Flex, set the output variable FLEX to its path if found.
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# Reject versions before 2.5.31, as we need a reasonably non-buggy reentrant
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# scanner. (Note: the well-publicized security problem in 2.5.31 does not
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# affect Postgres, and there are still distros shipping patched 2.5.31,
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# so allow it.) Also find Flex if its installed under `lex', but do not
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# accept other Lex programs.
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AC_DEFUN([PGAC_PATH_FLEX],
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[AC_CACHE_CHECK([for flex], pgac_cv_path_flex,
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[# Let the user override the test
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if test -n "$FLEX"; then
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pgac_cv_path_flex=$FLEX
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else
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pgac_save_IFS=$IFS
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IFS=$PATH_SEPARATOR
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for pgac_dir in $PATH; do
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IFS=$pgac_save_IFS
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if test -z "$pgac_dir" || test x"$pgac_dir" = x"."; then
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pgac_dir=`pwd`
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fi
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for pgac_prog in flex lex; do
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pgac_candidate="$pgac_dir/$pgac_prog"
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if test -f "$pgac_candidate" \
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&& $pgac_candidate --version </dev/null >/dev/null 2>&1
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then
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echo '%%' > conftest.l
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if $pgac_candidate -t conftest.l 2>/dev/null | grep FLEX_SCANNER >/dev/null 2>&1; then
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pgac_flex_version=`$pgac_candidate --version 2>/dev/null`
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if echo "$pgac_flex_version" | sed ['s/[.a-z]/ /g'] | $AWK '{ if ([$]1 == 2 && ([$]2 > 5 || ([$]2 == 5 && [$]3 >= 31))) exit 0; else exit 1;}'
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then
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pgac_cv_path_flex=$pgac_candidate
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break 2
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else
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AC_MSG_WARN([
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*** The installed version of Flex, $pgac_candidate, is too old to use with PostgreSQL.
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*** Flex version 2.5.31 or later is required, but this is $pgac_flex_version.])
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fi
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fi
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fi
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done
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done
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rm -f conftest.l lex.yy.c
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: ${pgac_cv_path_flex=no}
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fi
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])[]dnl AC_CACHE_CHECK
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if test x"$pgac_cv_path_flex" = x"no"; then
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AC_MSG_WARN([
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*** Without Flex you will not be able to build PostgreSQL from Git nor
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*** change any of the scanner definition files. You can obtain Flex from
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*** a GNU mirror site. (If you are using the official distribution of
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*** PostgreSQL then you do not need to worry about this because the Flex
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*** output is pre-generated.)])
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FLEX=
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else
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FLEX=$pgac_cv_path_flex
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pgac_flex_version=`$FLEX --version 2>/dev/null`
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AC_MSG_NOTICE([using $pgac_flex_version])
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fi
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AC_SUBST(FLEX)
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AC_SUBST(FLEXFLAGS)
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])# PGAC_PATH_FLEX
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# PGAC_LDAP_SAFE
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# --------------
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# PostgreSQL sometimes loads libldap_r and plain libldap into the same
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# process. Check for OpenLDAP versions known not to tolerate doing so; assume
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# non-OpenLDAP implementations are safe. The dblink test suite exercises the
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# hazardous interaction directly.
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AC_DEFUN([PGAC_LDAP_SAFE],
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[AC_CACHE_CHECK([for compatible LDAP implementation], [pgac_cv_ldap_safe],
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[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
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[#include <ldap.h>
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#if !defined(LDAP_VENDOR_VERSION) || \
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(defined(LDAP_API_FEATURE_X_OPENLDAP) && \
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LDAP_VENDOR_VERSION >= 20424 && LDAP_VENDOR_VERSION <= 20431)
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choke me
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#endif], [])],
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[pgac_cv_ldap_safe=yes],
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[pgac_cv_ldap_safe=no])])
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if test "$pgac_cv_ldap_safe" != yes; then
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AC_MSG_WARN([
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*** With OpenLDAP versions 2.4.24 through 2.4.31, inclusive, each backend
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*** process that loads libpq (via WAL receiver, dblink, or postgres_fdw) and
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*** also uses LDAP will crash on exit.])
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fi])
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# PGAC_CHECK_READLINE
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# -------------------
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# Check for the readline library and dependent libraries, either
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# termcap or curses. Also try libedit, since NetBSD's is compatible.
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# Add the required flags to LIBS, define HAVE_LIBREADLINE.
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AC_DEFUN([PGAC_CHECK_READLINE],
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[AC_REQUIRE([AC_CANONICAL_HOST])
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AC_CACHE_CHECK([for library containing readline], [pgac_cv_check_readline],
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[pgac_cv_check_readline=no
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pgac_save_LIBS=$LIBS
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if test x"$with_libedit_preferred" != x"yes"
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then READLINE_ORDER="-lreadline -ledit"
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else READLINE_ORDER="-ledit -lreadline"
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fi
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for pgac_rllib in $READLINE_ORDER ; do
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for pgac_lib in "" " -ltermcap" " -lncurses" " -lcurses" ; do
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LIBS="${pgac_rllib}${pgac_lib} $pgac_save_LIBS"
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AC_TRY_LINK_FUNC([readline], [[
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# Older NetBSD, OpenBSD, and Irix have a broken linker that does not
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# recognize dependent libraries; assume curses is needed if we didn't
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# find any dependency.
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case $host_os in
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netbsd* | openbsd* | irix*)
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if test x"$pgac_lib" = x"" ; then
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pgac_lib=" -lcurses"
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fi ;;
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esac
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pgac_cv_check_readline="${pgac_rllib}${pgac_lib}"
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break
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]])
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done
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if test "$pgac_cv_check_readline" != no ; then
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break
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fi
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done
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LIBS=$pgac_save_LIBS
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])[]dnl AC_CACHE_CHECK
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if test "$pgac_cv_check_readline" != no ; then
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LIBS="$pgac_cv_check_readline $LIBS"
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AC_DEFINE(HAVE_LIBREADLINE, 1, [Define if you have a function readline library])
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fi
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])# PGAC_CHECK_READLINE
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# PGAC_VAR_RL_COMPLETION_APPEND_CHARACTER
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# ---------------------------------------
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# Readline versions < 2.1 don't have rl_completion_append_character
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AC_DEFUN([PGAC_VAR_RL_COMPLETION_APPEND_CHARACTER],
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[AC_CACHE_CHECK([for rl_completion_append_character], pgac_cv_var_rl_completion_append_character,
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>
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#ifdef HAVE_READLINE_READLINE_H
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# include <readline/readline.h>
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#elif defined(HAVE_READLINE_H)
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# include <readline.h>
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#endif
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],
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[rl_completion_append_character = 'x';])],
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[pgac_cv_var_rl_completion_append_character=yes],
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[pgac_cv_var_rl_completion_append_character=no])])
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if test x"$pgac_cv_var_rl_completion_append_character" = x"yes"; then
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AC_DEFINE(HAVE_RL_COMPLETION_APPEND_CHARACTER, 1,
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[Define to 1 if you have the global variable 'rl_completion_append_character'.])
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fi])# PGAC_VAR_RL_COMPLETION_APPEND_CHARACTER
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# PGAC_CHECK_GETTEXT
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# ------------------
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# We check for bind_textdomain_codeset() not just gettext(). GNU gettext
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# before 0.10.36 does not have that function, and is generally too incomplete
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# to be usable.
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AC_DEFUN([PGAC_CHECK_GETTEXT],
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[
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AC_SEARCH_LIBS(bind_textdomain_codeset, intl, [],
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[AC_MSG_ERROR([a gettext implementation is required for NLS])])
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AC_CHECK_HEADER([libintl.h], [],
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[AC_MSG_ERROR([header file <libintl.h> is required for NLS])])
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PGAC_PATH_PROGS(MSGFMT, msgfmt)
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if test -z "$MSGFMT"; then
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AC_MSG_ERROR([msgfmt is required for NLS])
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fi
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AC_CACHE_CHECK([for msgfmt flags], pgac_cv_msgfmt_flags,
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[if test x"$MSGFMT" != x"" && "$MSGFMT" --version 2>&1 | grep "GNU" >/dev/null; then
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pgac_cv_msgfmt_flags=-c
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fi])
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AC_SUBST(MSGFMT_FLAGS, $pgac_cv_msgfmt_flags)
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PGAC_PATH_PROGS(MSGMERGE, msgmerge)
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PGAC_PATH_PROGS(XGETTEXT, xgettext)
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])# PGAC_CHECK_GETTEXT
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# PGAC_CHECK_STRIP
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# ----------------
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# Check for a 'strip' program, and figure out if that program can
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# strip libraries.
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AC_DEFUN([PGAC_CHECK_STRIP],
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[
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AC_CHECK_TOOL(STRIP, strip, :)
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AC_MSG_CHECKING([whether it is possible to strip libraries])
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if test x"$STRIP" != x"" && "$STRIP" -V 2>&1 | grep "GNU strip" >/dev/null; then
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STRIP_STATIC_LIB="$STRIP -x"
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STRIP_SHARED_LIB="$STRIP --strip-unneeded"
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AC_MSG_RESULT(yes)
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else
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case $host_os in
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darwin*)
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STRIP="$STRIP -x"
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STRIP_STATIC_LIB=$STRIP
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STRIP_SHARED_LIB=$STRIP
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AC_MSG_RESULT(yes)
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;;
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*)
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STRIP_STATIC_LIB=:
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STRIP_SHARED_LIB=:
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AC_MSG_RESULT(no)
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;;
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esac
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fi
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AC_SUBST(STRIP_STATIC_LIB)
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AC_SUBST(STRIP_SHARED_LIB)
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])# PGAC_CHECK_STRIP
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