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acinclude.m4
1270 lines (1142 loc) · 41.1 KB
/
acinclude.m4
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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
#
# DESCRIPTION
#
# Check whether the given FLAG works with the current language's compiler
# or gives an error. (Warnings, however, are ignored)
#
# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
# success/failure.
#
# If EXTRA-FLAGS is defined, it is added to the current language's default
# flags (e.g. CFLAGS) when the check is done. The check is thus made with
# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to
# force the compiler to issue an error when a bad flag is given.
#
# INPUT gives an alternative input source to AC_COMPILE_IFELSE.
#
# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
#
# LICENSE
#
# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
# Copyright (c) 2023 Albin Ahlbäck
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 6
# This code is modified to print CC instead of *language* compiler
AC_DEFUN([AX_CHECK_COMPILE_FLAG],
[AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
AC_CACHE_CHECK([whether $CC accepts $1], CACHEVAR, [
ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
[AS_VAR_SET(CACHEVAR,[yes])],
[AS_VAR_SET(CACHEVAR,[no])])
_AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
AS_VAR_IF(CACHEVAR,yes,
[m4_default([$2], :)],
[m4_default([$3], :)])
AS_VAR_POPDEF([CACHEVAR])dnl
])dnl AX_CHECK_COMPILE_FLAGS
# Test for CXX compiler
AC_DEFUN([AX_CXX_CHECK_COMPILE_FLAG],
[AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
AC_CACHE_CHECK([whether $CXX accepts $1], CACHEVAR, [
ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
[AS_VAR_SET(CACHEVAR,[yes])],
[AS_VAR_SET(CACHEVAR,[no])])
_AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
AS_VAR_IF(CACHEVAR,yes,
[m4_default([$2], :)],
[m4_default([$3], :)])
AS_VAR_POPDEF([CACHEVAR])dnl
])dnl AX_CXX_CHECK_COMPILE_FLAGS
dnl Copyright (C) 2024 Albin Ahlbäck
dnl
dnl This file is part of FLINT.
dnl
dnl FLINT is free software: you can redistribute it and/or modify it under
dnl the terms of the GNU Lesser General Public License (LGPL) as published
dnl by the Free Software Foundation; either version 3 of the License, or
dnl (at your option) any later version. See <https://www.gnu.org/licenses/>.
dnl NOTE: The first two patterns are taken from GMP. The license is down below.
define(X86_PATTERN,
[[i?86*-*-* | k[5-8]*-*-* | pentium*-*-* | athlon-*-* | viac3*-*-* | geode*-*-* | atom-*-*]])
define(X86_64_PATTERN,
[[athlon64-*-* | k8-*-* | k10-*-* | bobcat-*-* | jaguar*-*-* | bulldozer*-*-* | piledriver*-*-* | steamroller*-*-* | excavator*-*-* | zen*-*-* | pentium4-*-* | atom-*-* | silvermont-*-* | goldmont-*-* | tremont-*-* | core2-*-* | corei*-*-* | x86_64-*-* | nano-*-* | nehalem*-*-* | westmere*-*-* | sandybridge*-*-* | ivybridge*-*-* | haswell*-*-* | broadwell*-*-* | skylake*-*-* | kabylake*-*-* | icelake*-*-* | tigerlake*-*-* | rocketlake*-*-* | alderlake*-*-* | raptorlake*-*-* | x86_64v[1234]-*-*]])
define(X86_64_ADX_PATTERN,
[[zen[1234]-*-* | coreibwl-*-* | broadwell-*-* | skylake-*-* | skylake_server-*-* | cannonlake-*-* | kabylake-*-* | icelake-*-* | icelake_server-*-* | rocketlake-*-* | tigerlake-*-* | alderlake-*-* | raptorlake-*-* | knightslanding-*-* | sapphirerapids-*-* | cometlake-*-*]])
define(ARM64_PATTERN,
[[armcortexa53-*-* | armcortexa53neon-*-* | armcortexa55-*-* | armcortexa55neon-*-* | armcortexa57-*-* | armcortexa57neon-*-* | armcortexa7[2-9]-*-* | armcortexa7[2-9]neon-*-* | armexynosm1-*-* | armthunderx-*-* | armxgene1-*-* | aarch64*-*-* | applem[1-9]*-*-* | armv8*-*-*]])
define(SLOW_VROUNDPD_PATTERN,
[[haswell* | broadwell* | skylake* | kabylake* | icelake* | tigerlake* | rocketlake* | alderlake* | raptorlake*]])
define(FAST_VROUNDPD_PATTERN,
[[znver[2-4]* | sandybridge* | ivybridge*]])
dnl FLINT_CLANG([action-if-true],[action-if-false])
dnl -----------------------
dnl Checks if compiler is clang.
AC_DEFUN([FLINT_CLANG],
[AC_CACHE_CHECK([if compiler is Clang],
flint_cv_clang,
[flint_cv_clang="no"
AC_PREPROC_IFELSE([AC_LANG_PROGRAM([
#ifndef __clang__
#error
error
#endif
],[])],
[flint_cv_clang="yes"])
])
AS_VAR_IF([flint_cv_clang],"yes",
[m4_default([$1], :)],
[m4_default([$2], :)])
])
dnl FLINT_CHECK_CPU_SET_T([action-if-true],[action-if-false])
dnl -----------------------
dnl Checks if cpu_set_t is supported.
dnl
dnl FIXME: Does this cover all BSD systems?
AC_DEFUN([FLINT_CHECK_CPU_SET_T],
[AC_CACHE_CHECK([if cpu_set_t is supported],
flint_cv_check_cpu_set_t,
[flint_cv_check_cpu_set_t="no"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
#define _GNU_SOURCE
#include <sched.h>
#include <pthread.h>
],
[cpu_set_t s;
CPU_ZERO(&s);
pthread_getaffinity_np(pthread_self(), sizeof(cpu_set_t), 0);])],
[flint_cv_check_cpu_set_t="yes"])
])
AS_VAR_IF([flint_cv_check_cpu_set_t],"yes",
[m4_default([$1], :)],
[m4_default([$2], :)])
])
dnl FLINT_CHECK_NTL([action-if-true],[action-if-false])
dnl -----------------------
dnl Checks if linking with NTL works.
AC_DEFUN([FLINT_CHECK_NTL],
[AC_REQUIRE([AC_PROG_CXX])
AC_CACHE_CHECK([if linking with NTL works],
flint_cv_check_ntl,
[flint_cv_check_ntl="no"
save_LIBS="$LIBS"
LIBS="-lntl $LIBS"
AC_LANG_PUSH([C++])
AC_LINK_IFELSE([AC_LANG_PROGRAM(
[[#include <NTL/ZZ.h>
]], [NTL::ZZ a, b, c;
std::cin >> a;
std::cin >> b;
c = (a+1)*(b+1);
std::cout << c << "\n";])],
[flint_cv_check_ntl="yes"])
AC_LANG_POP([C++])
LIBS="$save_LIBS"
])
AS_VAR_IF([flint_cv_check_ntl],"yes",
[m4_default([$1], :)],
[m4_default([$2], :)])
])
dnl FLINT_PREPROC_IFELSE(input,[action-if-true],[action-if-false])
dnl -----------------------
dnl Runs preprocessor with CFLAGS.
dnl
dnl FIXME: Autoconf states that some compilers do not accept CFLAGS in the
dnl preprocessor. Which ones is it? GCC and Clang certainly does. If it does
dnl not allow CFLAGS into preprocessor, we should just compile normally.
AC_DEFUN([FLINT_PREPROC_IFELSE],
[AC_REQUIRE([AC_PROG_CPP])
save_ac_cpp="$ac_cpp"
ac_cpp="$CPP $CFLAGS $CPPFLAGS"
AC_PREPROC_IFELSE($@)
ac_cpp="$ac_cpp"
])
dnl FLINT_CHECK_GMP_H(MAJOR, MINOR, PATCHLEVEL)
dnl -----------------------
dnl Checks that gmp.h can be found and that its version fullfills the version
dnl requirement.
AC_DEFUN([FLINT_CHECK_GMP_H],
[AC_CHECK_HEADER([gmp.h],,AC_MSG_ERROR([Could not find gmp.h]))
AC_MSG_CHECKING([if version of GMP is greater than $1.$2.$3])
AC_PREPROC_IFELSE([AC_LANG_PROGRAM(
[#include <gmp.h>
],[#if (__GNU_MP_VERSION < $1) \
|| (__GNU_MP_VERSION == $1 && __GNU_MP_VERSION_MINOR < $2) \
|| (__GNU_MP_VERSION == $1 && __GNU_MP_VERSION_MINOR == $2 && __GNU_MP_VERSION_PATCHLEVEL < $3)
# error GMP version $1.$2.$3 or later is required
#endif
]
)],
AC_MSG_RESULT([yes]),
AC_MSG_RESULT([no])
AC_MSG_ERROR([GMP version $1.$2.$3 or later is required.])
)
])
dnl FLINT_CHECK_MPFR_H(MAJOR, MINOR, PATCHLEVEL)
dnl -----------------------
dnl Checks that mpfr.h can be found and that its version fullfills the version
dnl requirement.
AC_DEFUN([FLINT_CHECK_MPFR_H],
[AC_REQUIRE([FLINT_CHECK_GMP_H])
AC_CHECK_HEADER([mpfr.h],,AC_MSG_ERROR([Could not find mpfr.h]))
AC_MSG_CHECKING([if version of MPFR is greater than $1.$2.$3])
AC_PREPROC_IFELSE([AC_LANG_PROGRAM(
[#include <mpfr.h>
],[#if (MPFR_VERSION_MAJOR < $1) \
|| (MPFR_VERSION_MAJOR == $1 && MPFR_VERSION_MINOR < $2) \
|| (MPFR_VERSION_MAJOR == $1 && MPFR_VERSION_MINOR == $2 && MPFR_VERSION_PATCHLEVEL < $3)
# error MPFR version $1.$2.$3 or later is required
#endif
]
)],
AC_MSG_RESULT([yes]),
AC_MSG_RESULT([no])
AC_MSG_ERROR([MPFR version $1.$2.$3 or later is required.])
)
])
dnl FLINT_GMP_LONG_LONG_LIMB([action-success][,action-fail])
dnl -----------------------
dnl Check if GMP uses long long limb.
AC_DEFUN([FLINT_GMP_LONG_LONG_LIMB],
[AC_REQUIRE([FLINT_CHECK_GMP_H])
AC_CACHE_CHECK([if GMP defines mp_limb_t as unsigned long long int],
flint_cv_gmp_long_long_limb,
[AC_PREPROC_IFELSE([AC_LANG_PROGRAM(
[
#include <gmp.h>
],[
#if !defined(_LONG_LONG_LIMB)
# error mp_limb_t != unsigned long long int
#endif
]
)],
flint_cv_gmp_long_long_limb="yes",
flint_cv_gmp_long_long_limb="no"
)])
AS_VAR_IF([flint_cv_gmp_long_long_limb],"yes",
[m4_default([$1], :)],
[m4_default([$2], :)])
])
dnl FLINT_ABI
dnl -----------------------
dnl Checks what ABI to use. First checks if ABI is given. If none where given,
dnl check GMP's configuration.
AC_DEFUN([FLINT_ABI],
[AC_REQUIRE([FLINT_CHECK_GMP_H])
AC_ARG_VAR(ABI, [Desired ABI])
AC_CACHE_CHECK([for desired ABI],
flint_cv_abi,
[if test -n "$ABI";
then
flint_cv_abi="$ABI"
else
AC_PREPROC_IFELSE([AC_LANG_PROGRAM(
[
#include <gmp.h>
],[
#if GMP_LIMB_BITS == 32
#error Dead man
error
#endif
]
)],
flint_cv_abi="64",
flint_cv_abi="32"
)
fi
])
])
dnl FLINT_HAVE_FFT_SMALL_ARM_H
dnl -----------------------
dnl Checks if system have headers for fft_small on Arm. Will only run if on
dnl arm64.
AC_DEFUN([FLINT_HAVE_FFT_SMALL_ARM_H],
[case $host in
ARM64_PATTERN)
AC_CHECK_HEADERS([arm_neon.h],
flint_cv_have_fft_small_arm_h="yes",
flint_cv_have_fft_small_arm_h="no")
;;
esac])
dnl FLINT_HAVE_FFT_SMALL_ARM_I
dnl -----------------------
dnl Checks if system supports Arm NEON instructions.
AC_DEFUN([FLINT_HAVE_FFT_SMALL_ARM_I],
[case $host in
ARM64_PATTERN)
AC_CACHE_CHECK([if system have required ARM instruction set for fft_small],
flint_cv_have_fft_small_arm_i,
[FLINT_PREPROC_IFELSE([AC_LANG_SOURCE([
#if !defined(__ARM_NEON)
#error Dead man
error
#endif
])],
flint_cv_have_fft_small_arm_i="yes",
flint_cv_have_fft_small_arm_i="no")])
;;
esac])
dnl FLINT_HAVE_FFT_SMALL_X86_H
dnl -----------------------
dnl Checks if system have headers for fft_small on x86.
AC_DEFUN([FLINT_HAVE_FFT_SMALL_X86_H],
[case $host in
X86_64_PATTERN)
AC_CHECK_HEADERS([immintrin.h],
flint_cv_have_fft_small_x86_h="yes",
flint_cv_have_fft_small_x86_h="no")
;;
esac])
dnl FLINT_HAVE_FFT_SMALL_X86_I
dnl -----------------------
dnl Checks if system supports AVX2 instructions.
AC_DEFUN([FLINT_HAVE_FFT_SMALL_X86_I],
[case $host in
X86_64_PATTERN)
AC_CACHE_CHECK([if system have required x86_64 instruction set for fft_small],
flint_cv_have_fft_small_x86_i,
[FLINT_PREPROC_IFELSE([AC_LANG_SOURCE([
#if !defined(__AVX2__)
#error Dead man
error
#endif
])],
flint_cv_have_fft_small_x86_i="yes",
flint_cv_have_fft_small_x86_i="no")])
;;
esac])
dnl FLINT_CHECK_FFT_SMALL([action-success][,action-fail])
dnl -----------------------
dnl Checks if fft_small module is available.
dnl Do "action-success" if this succeeds, "action-fail" if not.
AC_DEFUN([FLINT_CHECK_FFT_SMALL],
[AC_REQUIRE([FLINT_ABI])
AC_REQUIRE([FLINT_HAVE_FFT_SMALL_ARM_H])
AC_REQUIRE([FLINT_HAVE_FFT_SMALL_ARM_I])
AC_REQUIRE([FLINT_HAVE_FFT_SMALL_X86_H])
AC_REQUIRE([FLINT_HAVE_FFT_SMALL_X86_I])
AC_CACHE_CHECK([if system can use FLINT's fft_small module],
flint_cv_check_fft_small,
[flint_cv_check_fft_small="no"
if test "$flint_cv_abi" = "64";
then
if test "$flint_cv_have_fft_small_arm_h" = "yes" && test "$flint_cv_have_fft_small_arm_i" = "yes";
then
flint_cv_check_fft_small="yes"
fi
if test "$flint_cv_have_fft_small_x86_h" = "yes" && test "$flint_cv_have_fft_small_x86_i" = "yes";
then
flint_cv_check_fft_small="yes"
fi
fi
])
AS_VAR_IF([flint_cv_check_fft_small],"yes",
[m4_default([$1], :)],
[m4_default([$2], :)])
])
dnl GMP specific autoconf macros
dnl (Taken from GMP 6.3.0)
dnl
dnl Copyright 2000-2006, 2009, 2011, 2013-2018 Free Software Foundation, Inc.
dnl
dnl This file is part of the GNU MP Library.
dnl
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General Public License as published by the Free
dnl Software Foundation; either version 3 of the License, or (at your
dnl option) any later version.
dnl
dnl or
dnl
dnl * the GNU General Public License as published by the Free Software
dnl Foundation; either version 2 of the License, or (at your option) any
dnl later version.
dnl
dnl or both in parallel, as here.
dnl
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
dnl for more details.
dnl
dnl You should have received copies of the GNU General Public License and the
dnl GNU Lesser General Public License along with the GNU MP Library. If not,
dnl see https://www.gnu.org/licenses/.
dnl GMP_INIT([M4-DEF-FILE])
dnl -----------------------
dnl Initializations for GMP config.m4 generation.
dnl
dnl FIXME: The generated config.m4 doesn't get recreated by config.status.
dnl Maybe the relevant "echo"s should go through AC_CONFIG_COMMANDS.
dnl NOTE: This is different from GMP.
AC_DEFUN([GMP_INIT],
[ifelse([$1], , gmp_configm4=config.m4, gmp_configm4="[$1]")
gmp_tmpconfigm4=cnfm4.tmp
gmp_tmpconfigm4i=cnfm4i.tmp
gmp_tmpconfigm4p=cnfm4p.tmp
rm -f $gmp_tmpconfigm4 $gmp_tmpconfigm4i $gmp_tmpconfigm4p
# All CPUs use asm-defs.m4
echo ["include][(\`src/mpn_extras/asm-defs.m4')"] >>$gmp_tmpconfigm4i
])
dnl GMP_FINISH
dnl ----------
dnl Create config.m4 from its accumulated parts.
dnl
dnl __CONFIG_M4_INCLUDED__ is used so that a second or subsequent include
dnl of config.m4 is harmless.
dnl
dnl A separate ifdef on the angle bracket quoted part ensures the quoting
dnl style there is respected. The basic defines from gmp_tmpconfigm4 are
dnl fully quoted but are still put under an ifdef in case any have been
dnl redefined by one of the m4 include files.
dnl
dnl Doing a big ifdef within asm-defs.m4 and/or other macro files wouldn't
dnl work, since it'd interpret parentheses and quotes in dnl comments, and
dnl having a whole file as a macro argument would overflow the string space
dnl on BSD m4.
AC_DEFUN([GMP_FINISH],
[AC_REQUIRE([GMP_INIT])
echo "creating $gmp_configm4"
echo ["d""nl $gmp_configm4. Generated automatically by configure."] > $gmp_configm4
if test -f $gmp_tmpconfigm4; then
echo ["changequote(<,>)"] >> $gmp_configm4
echo ["ifdef(<__CONFIG_M4_INCLUDED__>,,<"] >> $gmp_configm4
cat $gmp_tmpconfigm4 >> $gmp_configm4
echo [">)"] >> $gmp_configm4
echo ["changequote(\`,')"] >> $gmp_configm4
rm $gmp_tmpconfigm4
fi
echo ["ifdef(\`__CONFIG_M4_INCLUDED__',,\`"] >> $gmp_configm4
if test -f $gmp_tmpconfigm4i; then
cat $gmp_tmpconfigm4i >> $gmp_configm4
rm $gmp_tmpconfigm4i
fi
if test -f $gmp_tmpconfigm4p; then
cat $gmp_tmpconfigm4p >> $gmp_configm4
rm $gmp_tmpconfigm4p
fi
echo ["')"] >> $gmp_configm4
echo ["define(\`__CONFIG_M4_INCLUDED__')"] >> $gmp_configm4
])
dnl GMP_INCLUDE_MPN(FILE)
dnl ---------------------
dnl Add an include_mpn(`FILE') to config.m4. FILE should be a path
dnl relative to the mpn source directory, for example
dnl
dnl GMP_INCLUDE_MPN(`x86/x86-defs.m4')
dnl
AC_DEFUN([GMP_INCLUDE_MPN],
[AC_REQUIRE([GMP_INIT])
echo ["include(\`$1')"] >> $gmp_tmpconfigm4i
])
dnl GMP_PROG_M4
dnl -----------
dnl Find a working m4, either in $PATH or likely locations, and setup $M4
dnl and an AC_SUBST accordingly. If $M4 is already set then it's a user
dnl choice and is accepted with no checks. GMP_PROG_M4 is like
dnl AC_PATH_PROG or AC_CHECK_PROG, but tests each m4 found to see if it's
dnl good enough.
dnl
dnl See mpn/asm-defs.m4 for details on the known bad m4s.
AC_DEFUN([GMP_PROG_M4],
[AC_ARG_VAR(M4,[m4 macro processor])
AC_CACHE_CHECK([for suitable m4],
gmp_cv_prog_m4,
[if test -n "$M4"; then
gmp_cv_prog_m4="$M4"
else
cat >conftest.m4 <<\EOF
dnl Must protect this against being expanded during autoconf m4!
dnl Dont put "dnl"s in this as autoconf will flag an error for unexpanded
dnl macros.
[define(dollarhash,``$][#'')ifelse(dollarhash(x),1,`define(t1,Y)',
``bad: $][# not supported (SunOS /usr/bin/m4)
'')ifelse(eval(89),89,`define(t2,Y)',
`bad: eval() doesnt support 8 or 9 in a constant (OpenBSD 2.6 m4)
')ifelse(eval(9,9),10,`define(t3,Y)',
`bad: eval() doesnt support radix in eval (FreeBSD 8.x,9.0,9.1,9.2 m4)
')ifelse(t1`'t2`'t3,YYY,`good
')]
EOF
dnl ' <- balance the quotes for emacs sh-mode
echo "trying m4" >&AS_MESSAGE_LOG_FD
gmp_tmp_val=`(m4 conftest.m4) 2>&AS_MESSAGE_LOG_FD`
echo "$gmp_tmp_val" >&AS_MESSAGE_LOG_FD
if test "$gmp_tmp_val" = good; then
gmp_cv_prog_m4="m4"
else
IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":"
dnl $ac_dummy forces splitting on constant user-supplied paths.
dnl POSIX.2 word splitting is done only on the output of word expansions,
dnl not every word. This closes a longstanding sh security hole.
ac_dummy="$PATH:/usr/5bin"
for ac_dir in $ac_dummy; do
test -z "$ac_dir" && ac_dir=.
echo "trying $ac_dir/m4" >&AS_MESSAGE_LOG_FD
gmp_tmp_val=`($ac_dir/m4 conftest.m4) 2>&AS_MESSAGE_LOG_FD`
echo "$gmp_tmp_val" >&AS_MESSAGE_LOG_FD
if test "$gmp_tmp_val" = good; then
gmp_cv_prog_m4="$ac_dir/m4"
break
fi
done
IFS="$ac_save_ifs"
if test -z "$gmp_cv_prog_m4"; then
AC_MSG_ERROR([No usable m4 in \$PATH or /usr/5bin (see config.log for reasons).])
fi
fi
rm -f conftest.m4
fi])
M4="$gmp_cv_prog_m4"
AC_SUBST(M4)
])
dnl GMP_PATH_NM
dnl -----------
dnl GMP additions to libtool LT_PATH_NM.
dnl
dnl Note that if LT_PATH_NM can't find a working nm it still leaves
dnl $NM set to "nm", so $NM can't be assumed to actually work.
dnl
dnl A user-selected $NM is always left unchanged. LT_PATH_NM is still run
dnl to get the "checking" message printed though.
dnl
dnl Perhaps it'd be worthwhile checking that nm works, by running it on an
dnl actual object file. For instance on sparcv9 solaris old versions of
dnl GNU nm don't recognise 64-bit objects. Checking would give a better
dnl error message than just a failure in later tests like GMP_ASM_W32 etc.
dnl
dnl On the other hand it's not really normal autoconf practice to take too
dnl much trouble over detecting a broken set of tools. And libtool doesn't
dnl do anything at all for say ranlib or strip. So for now we're inclined
dnl to just demand that the user provides a coherent environment.
AC_DEFUN([GMP_PATH_NM],
[
gmp_user_NM=$NM
dnl Is already called in LT_INIT
dnl LT_PATH_NM
# FIXME: When cross compiling (ie. $ac_tool_prefix not empty), libtool
# defaults to plain "nm" if a "${ac_tool_prefix}nm" is not found. In this
# case run it again to try the native "nm", firstly so that likely locations
# are searched, secondly so that -B or -p are added if necessary for BSD
# format. This is necessary for instance on OSF with "./configure
# --build=alphaev5-dec-osf --host=alphaev6-dec-osf".
#
if test -z "$gmp_user_NM" && test -n "$ac_tool_prefix" && test "$NM" = nm; then
$as_unset lt_cv_path_NM
gmp_save_ac_tool_prefix=$ac_tool_prefix
ac_tool_prefix=
NM=
LT_PATH_NM
ac_tool_prefix=$gmp_save_ac_tool_prefix
fi
if test -z "$gmp_user_NM"; then
eval nmflags=\"\$nm${abi1}_flags\"
test -n "$nmflags" || eval nmflags=\"\$nm${abi2}_flags\"
if test -n "$nmflags"; then
AC_MSG_CHECKING([for extra nm flags])
NM="$NM $nmflags"
AC_MSG_RESULT([$nmflags])
fi
fi
])
dnl GMP_DEFINE(MACRO, DEFINITION [, LOCATION])
dnl ------------------------------------------
dnl Define M4 macro MACRO as DEFINITION in temporary file.
dnl
dnl If LOCATION is `POST', the definition will appear after any include()
dnl directives inserted by GMP_INCLUDE. Mind the quoting! No shell
dnl variables will get expanded. Don't forget to invoke GMP_FINISH to
dnl create file config.m4. config.m4 uses `<' and '>' as quote characters
dnl for all defines.
AC_DEFUN([GMP_DEFINE],
[AC_REQUIRE([GMP_INIT])
echo ['define(<$1>, <$2>)'] >>ifelse([$3], [POST],
$gmp_tmpconfigm4p, $gmp_tmpconfigm4)
])
dnl GMP_DEFINE_RAW(STRING [, LOCATION])
dnl ------------------------------------
dnl Put STRING into config.m4 file.
dnl
dnl If LOCATION is `POST', the definition will appear after any include()
dnl directives inserted by GMP_INCLUDE. Don't forget to invoke GMP_FINISH
dnl to create file config.m4.
AC_DEFUN([GMP_DEFINE_RAW],
[AC_REQUIRE([GMP_INIT])
echo [$1] >> ifelse([$2], [POST], $gmp_tmpconfigm4p, $gmp_tmpconfigm4)
])
dnl GMP_TRY_ASSEMBLE(asm-code,[action-success][,action-fail])
dnl ----------------------------------------------------------
dnl Attempt to assemble the given code.
dnl Do "action-success" if this succeeds, "action-fail" if not.
dnl
dnl conftest.o and conftest.out are available for inspection in
dnl "action-success". If either action does a "break" out of a loop then
dnl an explicit "rm -f conftest*" will be necessary.
dnl
dnl This is not unlike AC_TRY_COMPILE, but there's no default includes or
dnl anything in "asm-code", everything wanted must be given explicitly.
AC_DEFUN([GMP_TRY_ASSEMBLE],
[cat >conftest.s <<EOF
[$1]
EOF
gmp_assemble="$CC -c $CFLAGS $CPPFLAGS conftest.s >conftest.out 2>&1"
if AC_TRY_EVAL(gmp_assemble); then
cat conftest.out >&AS_MESSAGE_LOG_FD
ifelse([$2],,:,[$2])
else
cat conftest.out >&AS_MESSAGE_LOG_FD
echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
cat conftest.s >&AS_MESSAGE_LOG_FD
ifelse([$3],,:,[$3])
fi
rm -f conftest*
])
dnl GMP_ASM_LABEL_SUFFIX
dnl --------------------
dnl : - is usual.
dnl empty - hppa on HP-UX doesn't use a :, just the label name
dnl
dnl Note that it's necessary to test the empty case first, since HP "as"
dnl will accept "somelabel:", and take it to mean a label with a name that
dnl happens to end in a colon.
AC_DEFUN([GMP_ASM_LABEL_SUFFIX],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([for assembler label suffix],
gmp_cv_asm_label_suffix,
[gmp_cv_asm_label_suffix=unknown
for i in "" ":"; do
echo "trying $i" >&AS_MESSAGE_LOG_FD
GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
somelabel$i],
[gmp_cv_asm_label_suffix=$i
rm -f conftest*
break],
[cat conftest.out >&AS_MESSAGE_LOG_FD])
done
if test "$gmp_cv_asm_label_suffix" = "unknown"; then
AC_MSG_ERROR([Cannot determine label suffix])
fi
])
echo ["define(<LABEL_SUFFIX>, <$gmp_cv_asm_label_suffix>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_UNDERSCORE
dnl ------------------
dnl Determine whether global symbols need to be prefixed with an underscore.
dnl The output from "nm" is grepped to see what a typical symbol looks like.
dnl
dnl This test used to grep the .o file directly, but that failed with greps
dnl that don't like binary files (eg. SunOS 4).
dnl
dnl This test also used to construct an assembler file with and without an
dnl underscore and try to link that to a C file, to see which worked.
dnl Although that's what will happen in the real build we don't really want
dnl to depend on creating asm files within configure for every possible CPU
dnl (or at least we don't want to do that more than we have to).
dnl
dnl The fallback on no underscore is based on the assumption that the world
dnl is moving towards non-underscore systems. There should actually be no
dnl good reason for nm to fail though.
AC_DEFUN([GMP_ASM_UNDERSCORE],
[AC_REQUIRE([GMP_PATH_NM])
AC_CACHE_CHECK([if globals are prefixed by underscore],
gmp_cv_asm_underscore,
[gmp_cv_asm_underscore="unknown"
cat >conftest.c <<EOF
int gurkmacka;
EOF
gmp_compile="$CC $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD"
if AC_TRY_EVAL(gmp_compile); then
$NM conftest.$OBJEXT >conftest.out
if grep "[[ ]]_gurkmacka" conftest.out >/dev/null; then
gmp_cv_asm_underscore=yes
elif grep "[[ ]]gurkmacka" conftest.out >/dev/null; then
gmp_cv_asm_underscore=no
else
echo "configure: $NM doesn't have gurkmacka:" >&AS_MESSAGE_LOG_FD
cat conftest.out >&AS_MESSAGE_LOG_FD
fi
else
echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
cat conftest.c >&AS_MESSAGE_LOG_FD
fi
rm -f conftest*
])
case $gmp_cv_asm_underscore in
yes)
GMP_DEFINE(GSYM_PREFIX, [_]) ;;
no)
GMP_DEFINE(GSYM_PREFIX, []) ;;
*)
AC_MSG_WARN([+----------------------------------------------------------])
AC_MSG_WARN([| Cannot determine global symbol prefix.])
AC_MSG_WARN([| $NM output doesn't contain a global data symbol.])
AC_MSG_WARN([| Will proceed with no underscore.])
AC_MSG_WARN([| If this is wrong then you'll get link errors referring])
AC_MSG_WARN([| to ___gmpn_add_n (note three underscores).])
AC_MSG_WARN([| In this case do a fresh build with an override,])
AC_MSG_WARN([| ./configure gmp_cv_asm_underscore=yes])
AC_MSG_WARN([+----------------------------------------------------------])
GMP_DEFINE(GSYM_PREFIX, [])
;;
esac
])
dnl GMP_ASM_ALIGN_LOG
dnl -----------------
dnl Is parameter to `.align' logarithmic?
AC_DEFUN([GMP_ASM_ALIGN_LOG],
[AC_REQUIRE([GMP_ASM_GLOBL])
AC_REQUIRE([GMP_ASM_BYTE])
AC_REQUIRE([GMP_ASM_DATA])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_REQUIRE([GMP_PATH_NM])
AC_CACHE_CHECK([if .align assembly directive is logarithmic],
gmp_cv_asm_align_log,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_data
.align 4
$gmp_cv_asm_globl foo
$gmp_cv_asm_byte 1
.align 4
foo$gmp_cv_asm_label_suffix
$gmp_cv_asm_byte 2],
[gmp_tmp_val=[`$NM conftest.$OBJEXT | grep foo | \
sed -e 's;[[][0-9][]]\(.*\);\1;' -e 's;[^1-9]*\([0-9]*\).*;\1;'`]
if test "$gmp_tmp_val" = "10" || test "$gmp_tmp_val" = "16"; then
gmp_cv_asm_align_log=yes
else
gmp_cv_asm_align_log=no
fi],
[AC_MSG_ERROR([cannot assemble alignment test])])])
GMP_DEFINE_RAW(["define(<ALIGN_LOGARITHMIC>,<$gmp_cv_asm_align_log>)"])
])
dnl GMP_ASM_ALIGN_FILL_0x90
dnl -----------------------
dnl Determine whether a ",0x90" suffix works on a .align directive.
dnl This is only meant for use on x86, 0x90 being a "nop".
dnl
dnl Old gas, eg. 1.92.3
dnl Needs ",0x90" or else the fill is 0x00, which can't be executed
dnl across.
dnl
dnl New gas, eg. 2.91
dnl Generates multi-byte nop fills even when ",0x90" is given.
dnl
dnl Solaris 2.6 as
dnl ",0x90" is not allowed, causes a fatal error.
dnl
dnl Solaris 2.8 as
dnl ",0x90" does nothing, generates a warning that it's being ignored.
dnl
dnl SCO OpenServer 5 as
dnl Second parameter is max bytes to fill, not a fill pattern.
dnl ",0x90" is an error due to being bigger than the first parameter.
dnl Multi-byte nop fills are generated in text segments.
dnl
dnl Note that both solaris "as"s only care about ",0x90" if they actually
dnl have to use it to fill something, hence the .byte in the test. It's
dnl the second .align which provokes the error or warning.
dnl
dnl The warning from solaris 2.8 is suppressed to stop anyone worrying that
dnl something might be wrong.
AC_DEFUN([GMP_ASM_ALIGN_FILL_0x90],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_CACHE_CHECK([if the .align directive accepts an 0x90 fill in .text],
gmp_cv_asm_align_fill_0x90,
[GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_text
.align 4, 0x90
.byte 0
.align 4, 0x90],
[if grep "Warning: Fill parameter ignored for executable section" conftest.out >/dev/null; then
echo "Suppressing this warning by omitting 0x90" 1>&AS_MESSAGE_LOG_FD
gmp_cv_asm_align_fill_0x90=no
else
gmp_cv_asm_align_fill_0x90=yes
fi],
[gmp_cv_asm_align_fill_0x90=no])])
GMP_DEFINE_RAW(["define(<ALIGN_FILL_0x90>,<$gmp_cv_asm_align_fill_0x90>)"])
])
dnl GMP_ASM_BYTE
dnl ------------
dnl .byte - is usual.
dnl data1 - required by ia64 (on hpux at least).
dnl
dnl This macro is just to support other configure tests, not any actual asm
dnl code.
AC_DEFUN([GMP_ASM_BYTE],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_CACHE_CHECK([for assembler byte directive],
gmp_cv_asm_byte,
[for i in .byte data1; do
echo "trying $i" >&AS_MESSAGE_LOG_FD
GMP_TRY_ASSEMBLE(
[ $gmp_cv_asm_data
$i 0
],
[gmp_cv_asm_byte=$i
rm -f conftest*
break],
[cat conftest.out >&AS_MESSAGE_LOG_FD])
done
if test -z "$gmp_cv_asm_byte"; then
AC_MSG_ERROR([Cannot determine how to emit a data byte])
fi
])
])
dnl GMP_ASM_TEXT
dnl ------------
dnl .text - is usual.
dnl .code - is needed by the hppa on HP-UX (but ia64 HP-UX uses .text)
dnl .csect .text[PR] - is for AIX.
AC_DEFUN([GMP_ASM_TEXT],
[AC_CACHE_CHECK([how to switch to text section],
gmp_cv_asm_text,
[for i in ".text" ".code" [".csect .text[PR]"]; do
echo "trying $i" >&AS_MESSAGE_LOG_FD
GMP_TRY_ASSEMBLE([ $i],
[gmp_cv_asm_text=$i
rm -f conftest*
break])
done
if test -z "$gmp_cv_asm_text"; then
AC_MSG_ERROR([Cannot determine text section directive])
fi
])
echo ["define(<TEXT>, <$gmp_cv_asm_text>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_DATA
dnl ------------
dnl Can we say `.data'?
AC_DEFUN([GMP_ASM_DATA],
[AC_CACHE_CHECK([how to switch to data section],
gmp_cv_asm_data,
[case $host in
*-*-aix*) gmp_cv_asm_data=[".csect .data[RW]"] ;;
*) gmp_cv_asm_data=".data" ;;
esac
])
echo ["define(<DATA>, <$gmp_cv_asm_data>)"] >> $gmp_tmpconfigm4
])
dnl GMP_ASM_RODATA
dnl --------------
dnl Find out how to switch to the read-only data section.
dnl
dnl The compiler output is grepped for the right directive. It's not
dnl considered wise to just probe for ".section .rodata" or whatever works,
dnl since arbitrary section names might be accepted, but not necessarily do
dnl the right thing when they get to the linker.
dnl
dnl Only a few asm files use RODATA, so this code is perhaps a bit
dnl excessive right now, but should find more uses in the future.
dnl
dnl FIXME: gcc on aix generates something like ".csect _foo.ro_c[RO],3"
dnl where foo is the object file. Might need to check for that if we use
dnl RODATA there.
AC_DEFUN([GMP_ASM_RODATA],
[AC_REQUIRE([GMP_ASM_TEXT])
AC_REQUIRE([GMP_ASM_DATA])
AC_REQUIRE([GMP_ASM_LABEL_SUFFIX])
AC_REQUIRE([GMP_ASM_UNDERSCORE])
AC_CACHE_CHECK([how to switch to read-only data section],
gmp_cv_asm_rodata,
[
dnl Default to DATA on CPUs with split code/data caching, and TEXT
dnl elsewhere. i386 means generic x86, so use DATA on it.
case $host in
X86_64_PATTERN)
gmp_cv_asm_rodata="$gmp_cv_asm_data" ;;
*)
gmp_cv_asm_rodata="$gmp_cv_asm_text" ;;
esac
cat >conftest.c <<EOF
extern const int foo[[]]; /* Suppresses C++'s suppression of foo */
const int foo[[]] = {1,2,3};
EOF
echo "Test program:" >&AS_MESSAGE_LOG_FD
cat conftest.c >&AS_MESSAGE_LOG_FD
gmp_compile="$CC $CFLAGS $CPPFLAGS -S conftest.c >&AS_MESSAGE_LOG_FD"
if AC_TRY_EVAL(gmp_compile); then
echo "Compiler output:" >&AS_MESSAGE_LOG_FD
cat conftest.s >&AS_MESSAGE_LOG_FD
if test $gmp_cv_asm_underscore = yes; then
tmp_gsym_prefix=_
else
tmp_gsym_prefix=
fi
# must see our label
if grep "^${tmp_gsym_prefix}foo$gmp_cv_asm_label_suffix" conftest.s >/dev/null 2>&AS_MESSAGE_LOG_FD; then
# take the last directive before our label (hence skipping segments
# getting debugging info etc)