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1b246eecfe
curl/m4/curl-compilers.m4
Yang Tse 1b246eecfe Initial attempt to detect HP C compiler
2008-10-08 02:29:13 +00:00

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#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://curl.haxx.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# $Id$
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
# serial 5
dnl CURL_CHECK_COMPILER
dnl -------------------------------------------------
dnl Verify if the C compiler being used is known.
AC_DEFUN([CURL_CHECK_COMPILER], [
#
compiler_id="unknown"
compiler_num="0"
#
flags_dbg_all="unknown"
flags_dbg_yes="unknown"
flags_dbg_off="unknown"
flags_opt_all="unknown"
flags_opt_yes="unknown"
flags_opt_off="unknown"
#
CURL_CHECK_COMPILER_DEC
CURL_CHECK_COMPILER_HP
CURL_CHECK_COMPILER_IBM
CURL_CHECK_COMPILER_INTEL
CURL_CHECK_COMPILER_GNU
#
if test "$compiler_id" = "unknown"; then
cat <<_EOF 1>&2
***
*** Warning: This configure script does not have information about the
*** compiler you are using, relative to the flags required to enable or
*** disable generation of debug info, optimization options or warnings.
***
*** Whatever settings are present in CFLAGS will be used for this run.
***
*** If you wish to help the cURL project to better support your compiler
*** you can report this and the required info on the libcurl development
*** mailing list: http://cool.haxx.se/mailman/listinfo/curl-library/
***
_EOF
fi
])
dnl CURL_CHECK_COMPILER_DEC
dnl -------------------------------------------------
dnl Verify if the C compiler being used is DEC's.
AC_DEFUN([CURL_CHECK_COMPILER_DEC], [
AC_MSG_CHECKING([whether we are using the DEC/Compaq C compiler])
CURL_CHECK_DEF([__DECC], [], [silent])
CURL_CHECK_DEF([__DECC_VER], [], [silent])
if test "$curl_cv_have_def___DECC" = "yes" &&
test "$curl_cv_have_def___DECC_VER" = "yes"; then
AC_MSG_RESULT([yes])
compiler_id="DECC"
flags_dbg_all="-g -g0 -g1 -g2 -g3"
flags_dbg_yes="-g2"
flags_dbg_off="-g0"
flags_opt_all="-O -O0 -O1 -O2 -O3 -O4"
flags_opt_yes="-O1"
flags_opt_off="-O0"
else
AC_MSG_RESULT([no])
fi
])
dnl CURL_CHECK_COMPILER_GNU
dnl -------------------------------------------------
dnl Verify if the C compiler being used is GNU's.
AC_DEFUN([CURL_CHECK_COMPILER_GNU], [
AC_REQUIRE([CURL_CHECK_COMPILER_INTEL])dnl
#
AC_MSG_CHECKING([whether we are using the GNU C compiler])
CURL_CHECK_DEF([__GNUC__], [], [silent])
if test "$curl_cv_have_def___GNUC__" = "yes" &&
test "$compiler_id" = "unknown"; then
AC_MSG_RESULT([yes])
compiler_id="GNUC"
gccver=`$CC -dumpversion`
gccvhi=`echo $gccver | cut -d . -f1`
gccvlo=`echo $gccver | cut -d . -f2`
compiler_num=`(expr $gccvhi "*" 100 + $gccvlo) 2>/dev/null`
flags_dbg_all="-g -g0 -g1 -g2 -g3"
flags_dbg_all="$flags_dbg_all -ggdb"
flags_dbg_all="$flags_dbg_all -gstabs"
flags_dbg_all="$flags_dbg_all -gstabs+"
flags_dbg_all="$flags_dbg_all -gcoff"
flags_dbg_all="$flags_dbg_all -gxcoff"
flags_dbg_all="$flags_dbg_all -gdwarf-2"
flags_dbg_all="$flags_dbg_all -gvms"
flags_dbg_yes="-g"
flags_dbg_off="-g0"
flags_opt_all="-O -O0 -O1 -O2 -O3 -Os"
flags_opt_yes="-O2"
flags_opt_off="-O0"
else
AC_MSG_RESULT([no])
fi
])
dnl CURL_CHECK_COMPILER_HP
dnl -------------------------------------------------
dnl Verify if the C compiler being used is HP's.
AC_DEFUN([CURL_CHECK_COMPILER_HP], [
AC_MSG_CHECKING([whether we are using the HP C compiler])
CURL_CHECK_DEF([__HP_cc], [], [silent])
if test "$curl_cv_have_def___HP_cc" = "yes"; then
AC_MSG_RESULT([yes])
compiler_id="HPC"
flags_dbg_all="-g -s"
flags_dbg_yes="-g"
flags_dbg_off="-s"
flags_opt_all="-O +O0 +O1 +O2 +O3 +O4"
flags_opt_yes="+O2"
flags_opt_off="+O0"
else
AC_MSG_RESULT([no])
fi
])
dnl CURL_CHECK_COMPILER_IBM
dnl -------------------------------------------------
dnl Verify if the C compiler being used is IBM's.
AC_DEFUN([CURL_CHECK_COMPILER_IBM], [
AC_MSG_CHECKING([whether we are using the IBM C compiler])
CURL_CHECK_DEF([__IBMC__], [], [silent])
if test "$curl_cv_have_def___IBMC__" = "yes"; then
AC_MSG_RESULT([yes])
compiler_id="IBMC"
flags_dbg_all="-g -g0 -g1 -g2 -g3"
flags_dbg_yes="-g"
flags_dbg_off=""
flags_opt_all="-O -O0 -O1 -O2 -O3 -O4 -O5"
flags_opt_all="$flags_opt_all -qnooptimize"
flags_opt_all="$flags_opt_all -qoptimize=0"
flags_opt_all="$flags_opt_all -qoptimize=1"
flags_opt_all="$flags_opt_all -qoptimize=2"
flags_opt_all="$flags_opt_all -qoptimize=3"
flags_opt_all="$flags_opt_all -qoptimize=4"
flags_opt_all="$flags_opt_all -qoptimize=5"
flags_opt_yes="-O2"
flags_opt_off="-qnooptimize"
else
AC_MSG_RESULT([no])
fi
])
dnl CURL_CHECK_COMPILER_INTEL
dnl -------------------------------------------------
dnl Verify if the C compiler being used is Intel's.
AC_DEFUN([CURL_CHECK_COMPILER_INTEL], [
AC_BEFORE([$0],[CURL_CHECK_COMPILER_GNU])dnl
AC_MSG_CHECKING([whether we are using the Intel C compiler])
CURL_CHECK_DEF([__INTEL_COMPILER], [], [silent])
if test "$curl_cv_have_def___INTEL_COMPILER" = "yes"; then
AC_MSG_RESULT([yes])
CURL_CHECK_DEF([__unix__], [], [silent])
if test "$curl_cv_have_def___unix__" = "yes"; then
compiler_id="ICC_unix"
flags_dbg_all="-g -g0"
flags_dbg_yes="-g"
flags_dbg_off="-g0"
flags_opt_all="-O -O0 -O1 -O2 -O3 -Os"
flags_opt_yes="-O2"
flags_opt_off="-O0"
else
compiler_id="ICC_windows"
flags_dbg_all="/ZI /Zi /zI /zi /ZD /Zd /zD /zd /Z7 /z7 /Oy /Oy-"
flags_dbg_all="$flags_dbg_all /debug"
flags_dbg_all="$flags_dbg_all /debug:none"
flags_dbg_all="$flags_dbg_all /debug:minimal"
flags_dbg_all="$flags_dbg_all /debug:partial"
flags_dbg_all="$flags_dbg_all /debug:full"
flags_dbg_all="$flags_dbg_all /debug:semantic_stepping"
flags_dbg_all="$flags_dbg_all /debug:extended"
flags_dbg_yes="/Zi /Oy-"
flags_dbg_off="/debug:none /Oy-"
flags_opt_all="/O /O0 /O1 /O2 /O3 /Od /Og /Og- /Oi /Oi-"
flags_opt_yes="/O2"
flags_opt_off="/Od"
fi
compiler_num="$curl_cv_def___INTEL_COMPILER"
else
AC_MSG_RESULT([no])
fi
])
dnl CURL_SET_COMPILER_BASIC_OPTS
dnl -------------------------------------------------
dnl Sets compiler specific options/flags which do not
dnl depend on configure's debug, optimize or warnings
dnl options.
AC_DEFUN([CURL_SET_COMPILER_BASIC_OPTS], [
AC_REQUIRE([CURL_CHECK_COMPILER])dnl
#
if test "$compiler_id" = "DECC"; then
dnl Select strict ANSI C compiler mode
CFLAGS="$CFLAGS -std1"
dnl Turn off optimizer ANSI C aliasing rules
CFLAGS="$CFLAGS -noansi_alias"
dnl Generate warnings for missing function prototypes
CFLAGS="$CFLAGS -warnprotos"
dnl Change some warnings into fatal errors
CFLAGS="$CFLAGS -msg_fatal toofewargs,toomanyargs"
fi
#
if test "$compiler_id" = "HPC"; then
dnl Disallow run-time dereferencing of null pointers
CFLAGS="$CFLAGS -z"
fi
#
if test "$compiler_id" = "IBMC"; then
dnl Ensure that compiler optimizations are always thread-safe.
CFLAGS="$CFLAGS -qthreaded"
dnl Disable type based strict aliasing optimizations, using worst
dnl case aliasing assumptions when compiling. Type based aliasing
dnl would restrict the lvalues that could be safely used to access
dnl a data object.
CFLAGS="$CFLAGS -qnoansialias"
dnl Force compiler to stop after the compilation phase, without
dnl generating an object code file when compilation has errors.
CFLAGS="$CFLAGS -qhalt=e"
fi
#
if test "$compiler_id" = "ICC_unix"; then
dnl On unix this compiler uses gcc's header files, so
dnl we select ANSI C89 dialect plus GNU extensions.
CPPFLAGS="$CPPFLAGS -std=gnu89"
dnl Change some warnings into errors
dnl #140: too many arguments in function call
dnl #147: declaration is incompatible with 'previous one'
dnl #165: too few arguments in function call
dnl #266: function declared implicitly
CPPFLAGS="$CPPFLAGS -we 140,147,165,266"
dnl Disable some remarks
dnl #279: controlling expression is constant
dnl #981: operands are evaluated in unspecified order
dnl #1469: "cc" clobber ignored
if test "$compiler_num" -lt "910"; then
CPPFLAGS="$CPPFLAGS -wd 279"
fi
CPPFLAGS="$CPPFLAGS -wd 981,1469"
dnl Disable use of ANSI C aliasing rules in optimizations
CFLAGS="$CFLAGS -no-ansi-alias"
dnl Disable floating point optimizations
CFLAGS="$CFLAGS -fp-model precise"
fi
])
dnl CURL_SET_COMPILER_DEBUG_OPTS
dnl -------------------------------------------------
dnl Sets compiler specific options/flags which depend
dnl on configure's debug option.
AC_DEFUN([CURL_SET_COMPILER_DEBUG_OPTS], [
AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl
AC_REQUIRE([CURL_CHECK_COMPILER])dnl
#
if test "$compiler_id" != "unknown"; then
#
ac_save_CFLAGS="$CFLAGS"
ac_save_CPPFLAGS="$CPPFLAGS"
#
honor_debug_option="yes"
CURL_VAR_STRIP([CFLAGS],[${flags_dbg_all}])
CURL_VAR_STRIP([CPPFLAGS],[${flags_dbg_all}])
if test "$want_debug" = "yes"; then
CFLAGS="$CFLAGS $flags_dbg_yes"
AC_MSG_CHECKING([if compiler accepts debug enabling flags $flags_dbg_yes])
fi
if test "$want_debug" = "no"; then
CFLAGS="$CFLAGS $flags_dbg_off"
AC_MSG_CHECKING([if compiler accepts debug disabling flags $flags_dbg_off])
fi
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
]],[[
int i = 1;
return i;
]])
],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
honor_debug_option="no"
])
#
if test "$honor_debug_option" = "no"; then
CFLAGS="$ac_save_CFLAGS"
CPPFLAGS="$ac_save_CPPFLAGS"
fi
#
fi
])
dnl CURL_SET_COMPILER_OPTIMIZE_OPTS
dnl -------------------------------------------------
dnl Sets compiler specific options/flags which depend
dnl on configure's optimize option.
AC_DEFUN([CURL_SET_COMPILER_OPTIMIZE_OPTS], [
AC_REQUIRE([CURL_CHECK_OPTION_OPTIMIZE])dnl
AC_REQUIRE([CURL_CHECK_COMPILER])dnl
#
if test "$compiler_id" != "unknown"; then
#
ac_save_CFLAGS="$CFLAGS"
ac_save_CPPFLAGS="$CPPFLAGS"
#
dnl If optimization request setting has not been explicitly specified,
dnl it has been derived from the debug setting and initially assumed.
dnl This initially assumed optimizer setting will finally be ignored
dnl if CFLAGS or CPPFLAGS already hold optimizer flags. This implies
dnl that an initially assumed optimizer setting might not be honored.
#
honor_optimize_option="yes"
if test "$want_optimize" = "assume_no" ||
test "$want_optimize" = "assume_yes"; then
AC_MSG_CHECKING([if compiler optimizer assumed setting might be used])
CURL_VAR_MATCH_IFELSE([CFLAGS],[${flags_opt_all}],[
honor_optimize_option="no"
])
CURL_VAR_MATCH_IFELSE([CPPFLAGS],[${flags_opt_all}],[
honor_optimize_option="no"
])
AC_MSG_RESULT([$honor_optimize_option])
if test "$honor_optimize_option" = "yes"; then
if test "$want_optimize" = "assume_yes"; then
want_optimize="yes"
fi
if test "$want_optimize" = "assume_no"; then
want_optimize="no"
fi
fi
fi
#
if test "$honor_optimize_option" = "yes"; then
CURL_VAR_STRIP([CFLAGS],[${flags_opt_all}])
CURL_VAR_STRIP([CPPFLAGS],[${flags_opt_all}])
if test "$want_optimize" = "yes"; then
CFLAGS="$CFLAGS $flags_opt_yes"
AC_MSG_CHECKING([if compiler accepts optimizer enabling flags $flags_opt_yes])
fi
if test "$want_optimize" = "no"; then
CFLAGS="$CFLAGS $flags_opt_off"
AC_MSG_CHECKING([if compiler accepts optimizer disabling flags $flags_opt_off])
fi
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
]],[[
int i = 1;
return i;
]])
],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
honor_optimize_option="no"
])
fi
#
if test "$honor_optimize_option" = "no"; then
CFLAGS="$ac_save_CFLAGS"
CPPFLAGS="$ac_save_CPPFLAGS"
fi
#
fi
])
dnl CURL_SET_COMPILER_WARNING_OPTS
dnl -------------------------------------------------
dnl Sets compiler options/flags which depend on
dnl configure's warnings given option.
AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
AC_REQUIRE([CURL_CHECK_OPTION_WARNINGS])dnl
AC_REQUIRE([CURL_CHECK_COMPILER])dnl
#
if test "$compiler_id" = "DECC"; then
if test "$want_warnings" = "yes"; then
dnl Select a higher warning level than default level2
CFLAGS="$CFLAGS -msg_enable level3"
fi
fi
#
if test "$compiler_id" = "HPC"; then
if test "$want_warnings" = "yes"; then
dnl Issue all warnings
CFLAGS="$CFLAGS +w1"
fi
fi
#
if test "$compiler_id" = "ICC_unix"; then
if test "$want_warnings" = "yes"; then
if test "$compiler_num" -gt "600"; then
dnl Show errors, warnings, and remarks
CPPFLAGS="$CPPFLAGS -Wall"
dnl Perform extra compile-time code checking
CPPFLAGS="$CPPFLAGS -Wcheck"
fi
fi
fi
#
if test "$compiler_id" = "GNUC"; then
#
# FIXME: Some of these warnings should be changed into errors
# and moved to CURL-SET-COMPILER-BASIC-OPTS
#
if test "$want_warnings" = "yes"; then
dnl this is a set of options we believe *ALL* gcc versions support:
WARN="-W -Wall -Wwrite-strings -pedantic -Wpointer-arith -Wnested-externs -Winline -Wmissing-prototypes"
dnl -Wcast-align is a bit too annoying on all gcc versions ;-)
if test "$compiler_num" -ge "207"; then
dnl gcc 2.7 or later
WARN="$WARN -Wmissing-declarations"
fi
if test "$compiler_num" -gt "295"; then
dnl only if the compiler is newer than 2.95 since we got lots of
dnl "`_POSIX_C_SOURCE' is not defined" in system headers with
dnl gcc 2.95.4 on FreeBSD 4.9!
WARN="$WARN -Wundef -Wno-long-long -Wsign-compare -Wshadow -Wno-multichar"
fi
if test "$compiler_num" -ge "296"; then
dnl gcc 2.96 or later
WARN="$WARN -Wfloat-equal"
fi
if test "$compiler_num" -gt "296"; then
dnl this option does not exist in 2.96
WARN="$WARN -Wno-format-nonliteral"
fi
dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on
dnl on i686-Linux as it gives us heaps with false positives.
dnl Also, on gcc 4.0.X it is totally unbearable and complains all
dnl over making it unusable for generic purposes. Let's not use it.
if test "$compiler_num" -ge "303"; then
dnl gcc 3.3 and later
WARN="$WARN -Wendif-labels -Wstrict-prototypes"
fi
if test "$compiler_num" -ge "304"; then
# try these on gcc 3.4
WARN="$WARN -Wdeclaration-after-statement"
fi
for flag in $CPPFLAGS; do
case "$flag" in
-I*)
dnl Include path, provide a -isystem option for the same dir
dnl to prevent warnings in those dirs. The -isystem was not very
dnl reliable on earlier gcc versions.
add=`echo $flag | sed 's/^-I/-isystem /g'`
WARN="$WARN $add"
;;
esac
done
CFLAGS="$CFLAGS $WARN"
AC_MSG_NOTICE([Added this set of compiler options: $WARN])
fi
fi
#
])
dnl CURL_PROCESS_DEBUG_BUILD_OPTS
dnl -------------------------------------------------
dnl Settings which depend on configure's debug given
dnl option, and further configure the build process.
dnl Don't use this macro for compiler dependant stuff.
AC_DEFUN([CURL_PROCESS_DEBUG_BUILD_OPTS], [
AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl
AC_BEFORE([$0],[AC_PROG_LIBTOOL])dnl
#
if test "$want_debug" = "yes"; then
CPPFLAGS="$CPPFLAGS -DCURLDEBUG"
fi
#
])
dnl CURL_CHECK_PROG_CC
dnl -------------------------------------------------
dnl Check for compiler program, preventing CFLAGS and
dnl CPPFLAGS from being unexpectedly changed.
AC_DEFUN([CURL_CHECK_PROG_CC], [
ac_save_CFLAGS="$CFLAGS"
ac_save_CPPFLAGS="$CPPFLAGS"
AC_PROG_CC
CFLAGS="$ac_save_CFLAGS"
CPPFLAGS="$ac_save_CPPFLAGS"
])
dnl CURL_VAR_MATCH (VARNAME, VALUE)
dnl -------------------------------------------------
dnl Verifies if shell variable VARNAME contains VALUE.
dnl Contents of variable VARNAME and VALUE are handled
dnl as whitespace separated lists of words. If at least
dnl one word of VALUE is present in VARNAME the match
dnl is considered positive, otherwise false.
AC_DEFUN([CURL_VAR_MATCH], [
ac_var_match_word="no"
for word1 in "${[$1]}"; do
for word2 in "[$2]"; do
if test "$word1" = "$word2"; then
ac_var_match_word="yes"
fi
done
done
])
dnl CURL_VAR_MATCH_IFELSE (VARNAME, VALUE,
dnl [ACTION-IF-MATCH], [ACTION-IF-NOT-MATCH])
dnl -------------------------------------------------
dnl This performs a CURL_VAR_MATCH check and executes
dnl first branch if the match is positive, otherwise
dnl the second branch is executed.
AC_DEFUN([CURL_VAR_MATCH_IFELSE], [
CURL_VAR_MATCH([$1],[$2])
if test "$ac_var_match_word" = "yes"; then
ifelse($3,,:,[$3])
ifelse($4,,,[else
[$4]])
fi
])
dnl CURL_VAR_STRIP (VARNAME, VALUE)
dnl -------------------------------------------------
dnl Contents of variable VARNAME and VALUE are handled
dnl as whitespace separated lists of words. Each word
dnl from VALUE is removed from VARNAME when present.
AC_DEFUN([CURL_VAR_STRIP], [
ac_var_stripped=""
for word1 in "${[$1]}"; do
ac_var_strip_word="no"
for word2 in "[$2]"; do
if test "$word1" = "$word2"; then
ac_var_strip_word="yes"
fi
done
if test "$ac_var_strip_word" = "no"; then
ac_var_stripped="$ac_var_stripped $word1"
fi
done
dnl squeeze whitespace out of result
[$1]=`eval echo $ac_var_stripped`
])
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