dnl Process this file with autoconf to produce a configure script. dnl WARNING! C code starting with # (preprocessor directives) must not dnl be indented! AC_COPYRIGHT([ Copyright 1999-2023 Free Software Foundation, Inc. Contributed by the AriC and Caramba projects, INRIA. This file is part of the GNU MPFR Library. The GNU MPFR Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. The GNU MPFR Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. ]) dnl Add check-news when it checks for more than 15 lines AC_INIT([MPFR],[4.2.0]) dnl AC_CANONICAL_HOST is needed by this configure.ac file. dnl AC_CANONICAL_TARGET is not explicitly needed, but may be required by dnl some other macros (e.g. AX_PTHREAD 29, committed on 2021-02-19) and dnl must be called quite early in order to avoid the following warning: dnl warning: AC_ARG_PROGRAM was called before AC_CANONICAL_TARGET dnl (we don't use AC_ARG_PROGRAM explicitly, but again, it is invoked by dnl another macro, apparently AM_INIT_AUTOMAKE). This has eventually been dnl fixed in AX_PTHREAD 31. dnl Due to this bug in AX_PTHREAD 29, AC_CANONICAL_HOST was moved here and dnl AC_CANONICAL_TARGET was added in r14481. However, it is unlikely that dnl we need AC_CANONICAL_TARGET in the future; see the comments at dnl https://github.com/autoconf-archive/autoconf-archive/commit/2567e0ce0f3a11b535c6b527386197fb49ff172b dnl (introducing AX_PTHREAD 29). Thus it is probably better to avoid it, dnl as it could cause confusion. But let's keep AC_CANONICAL_HOST here, dnl since this may be a better place than later. AC_CANONICAL_HOST dnl Older Automake versions than 1.13 may still be supported, but no longer dnl tested, and many things have changed in 1.13. Moreover the INSTALL file dnl and MPFR manual assume that MPFR has been built using Automake 1.13+ dnl (due to parallel tests, introduced by default in Automake 1.13). dnl The subdir-objects option is needed due to configuration related to dnl mini-gmp, which has sources in an external directory. AM_INIT_AUTOMAKE([1.13 no-define dist-bzip2 dist-xz dist-zip subdir-objects]) AM_MAINTAINER_MODE(enable) AC_CONFIG_MACRO_DIR([m4]) dnl Some AC_RUN_IFELSE programs need to be able to return several values dnl (e.g., in a format detection, one for each possible format). But the dnl Autoconf manual says: "This exit status might be that of a failed dnl compilation, or it might be that of a failed program execution." dnl Unfortunately, we cannot know whether a non-zero exit status comes dnl from a failed compilation, so that the detection may be incorrect. dnl Since failures generally occur with a small exit status, the value 77 dnl is reserved for skipped tests by Autoconf, and values larger than 125 dnl have special meanings in POSIX[*], good candidates for success are 0 dnl and values from 80 to 125. dnl https://tldp.org/LDP/abs/html/exitcodes.html suggests the range 64-113 dnl but note that /usr/include/sysexits.h now allocates previously unused dnl exit codes from 64 - 78 (for various kinds of errors). dnl dnl Alternatively, the test program could output the result to a file and dnl return with the 0 exit status if it could do that successfully. dnl dnl [*] 2.8.2 Exit Status for Commands dnl https://pubs.opengroup.org/onlinepubs/9699919799//utilities/V3_chap02.html#tag_18_08_02 test_CFLAGS=${CFLAGS+set} dnl Check if user request its CC and CFLAGS if test -n "$CFLAGS" || test -n "$CC" ; then user_redefine_cc=yes fi dnl Basic Autoconf macros. At this point, they must not make Autoconf dnl choose a compiler because of the CC and CFLAGS setup from gmp.h! AC_PROG_EGREP AC_PROG_SED dnl To use a separate config header. dnl There is still some problem with GMP's HAVE_CONFIG dnl AC_CONFIG_HEADERS([mpfrconf.h:mpfrconf.in]) unset gmp_lib_path GMP_CFLAGS GMP_CC dnl ******************************************************************** dnl Extra arguments to configure (AC_ARG_WITH and AC_ARG_ENABLE) AC_ARG_WITH(gmp_include, [ --with-gmp-include=DIR GMP include directory ], MPFR_PARSE_DIRECTORY(["$withval"],[withval]) CPPFLAGS="$CPPFLAGS -I$withval") AC_ARG_WITH(gmp_lib, [ --with-gmp-lib=DIR GMP lib directory ], [ MPFR_PARSE_DIRECTORY(["$withval"],[withval]) LDFLAGS="$LDFLAGS -L$withval" gmp_lib_path="$withval" ]) AC_ARG_WITH(gmp, [ --with-gmp=DIR GMP install directory ], [ MPFR_PARSE_DIRECTORY(["$withval"],[withval]) if test -z "$with_gmp_lib" && test -z "$with_gmp_include" ; then CPPFLAGS="$CPPFLAGS -I$withval/include" LDFLAGS="$LDFLAGS -L$withval/lib" gmp_lib_path="$withval/lib" else AC_MSG_FAILURE([Do not use --with-gmp and --with-gmp-include/--with-gmp-lib options simultaneously.]) fi ]) AC_ARG_WITH(gmp_build, [ --with-gmp-build=DIR GMP build directory (please read INSTALL file)], [ MPFR_PARSE_DIRECTORY(["$withval"],[withval]) if test -z "$gmp_lib_path" && test -z "$with_gmp_include" ; then CPPFLAGS="$CPPFLAGS -I$withval -I$withval/tune" LDFLAGS="$LDFLAGS -L$withval -L$withval/.libs -L$withval/tune" gmp_lib_path="$withval$PATH_SEPARATOR$withval/.libs$PATH_SEPARATOR$withval/tune" if test -r $withval/Makefile ; then GMP_CFLAGS=`$SED -n 's/^CFLAGS = //p' $withval/Makefile` GMP_CC=`$SED -n 's/^CC = //p' $withval/Makefile` GMP_SOURCE=`$SED -n 's/^srcdir = *//p' $withval/Makefile` case "$GMP_SOURCE" in .) GMP_SOURCE="" ;; /*) ;; ?*) GMP_SOURCE="$withval/$GMP_SOURCE" ;; esac if test -d "$GMP_SOURCE" ; then CPPFLAGS="$CPPFLAGS -I$GMP_SOURCE -I$GMP_SOURCE/tune" fi fi use_gmp_build=yes else AC_MSG_FAILURE([Do not use --with-gmp-build and other --with-gmp options simultaneously.]) fi ]) AC_ARG_WITH(mini_gmp, [ --with-mini-gmp=DIR use mini-gmp (sources in DIR) instead of GMP (experimental, please read doc/mini-gmp file)], [ MPFR_PARSE_DIRECTORY(["$withval"],[withval]) if test -z "$gmp_lib_path" && test -z "$with_gmp_include" && \ test -z "$use_gmp_build"; then if test -f "$withval/mini-gmp.c" && test -f "$withval/mini-gmp.h"; then AC_DEFINE([MPFR_USE_MINI_GMP],1,[Use mini-gmp]) mini_gmp_path="$withval" AC_SUBST(mini_gmp_path) else AC_MSG_FAILURE([mini-gmp.{c,h} not found in $withval]) fi else AC_MSG_FAILURE([Do not use --with-mini-gmp and other --with-gmp options simultaneously.]) fi ]) AC_ARG_WITH(mulhigh_size, [ --with-mulhigh-size=NUM internal threshold table for mulhigh], AC_DEFINE_UNQUOTED([MPFR_MULHIGH_SIZE],$withval, [Mulhigh size])) AC_ARG_ENABLE(gmp-internals, [ --enable-gmp-internals enable use of GMP undocumented functions [[default=no]]], [ case $enableval in yes) AC_DEFINE([WANT_GMP_INTERNALS],1,[Want GMP internals]) ;; no) ;; *) AC_MSG_ERROR([bad value for --enable-gmp-internals: yes or no]) ;; esac]) AC_ARG_ENABLE(assert, [ --enable-assert enable ASSERT checking [[default=no]]], [ case $enableval in yes) AC_DEFINE([MPFR_WANT_ASSERT],1,[Want all simple assertions]) ;; none) AC_DEFINE([MPFR_WANT_ASSERT],-1,[Do no want any assertion]) ;; no) ;; full) AC_DEFINE([MPFR_WANT_ASSERT],2,[Want full assertions]) ;; *) AC_MSG_ERROR([bad value for --enable-assert: yes, no, none or full]) ;; esac]) AC_ARG_ENABLE(logging, [ --enable-logging enable MPFR logging (needs nested functions and the 'cleanup' attribute) [[default=no]]], [ case $enableval in yes) AC_DEFINE([MPFR_USE_LOGGING],1,[Enable MPFR logging support]) ;; no) ;; *) AC_MSG_ERROR([bad value for --enable-logging: yes or no]) ;; esac]) AC_ARG_ENABLE(thread-safe, [ --disable-thread-safe explicitly disable TLS support --enable-thread-safe build MPFR as thread safe, i.e. with TLS support (the system must support it) [[default=autodetect]]], [ case $enableval in yes) ;; no) ;; *) AC_MSG_ERROR([bad value for --enable-thread-safe: yes or no]) ;; esac]) AC_ARG_ENABLE(shared-cache, [ --enable-shared-cache enable use of caches shared by all threads, for all MPFR constants. It usually makes MPFR dependent on PTHREAD [[default=no]]], [ case $enableval in yes) AC_DEFINE([MPFR_WANT_SHARED_CACHE],1,[Want shared cache]) ;; no) ;; *) AC_MSG_ERROR([bad value for --enable-shared-cache: yes or no]) ;; esac]) AC_ARG_ENABLE(warnings, [ --enable-warnings allow MPFR to output warnings to stderr [[default=no]]], [ case $enableval in yes) AC_DEFINE([MPFR_USE_WARNINGS],1,[Allow MPFR to output warnings to stderr]) ;; no) ;; *) AC_MSG_ERROR([bad value for --enable-warnings: yes or no]) ;; esac]) AC_ARG_ENABLE(tests-timeout, [ --enable-tests-timeout=NUM [[for developers]] enable timeout for test programs (NUM seconds, <= 9999) [[default=no]]; if this is enabled, the environment variable $MPFR_TESTS_TIMEOUT overrides NUM (0: no timeout)], [ case $enableval in no) ;; yes) AC_DEFINE([MPFR_TESTS_TIMEOUT], 0, [timeout limit]) ;; [[0-9]]|[[0-9]][[0-9]]|[[0-9]][[0-9]][[0-9]]|[[0-9]][[0-9]][[0-9]][[0-9]]) AC_DEFINE_UNQUOTED([MPFR_TESTS_TIMEOUT], $enableval, [timeout limit]) ;; *) AC_MSG_ERROR([bad value for --enable-tests-timeout]) ;; esac]) AC_ARG_ENABLE(tune-for-coverage, [ --enable-tune-for-coverage [[for developers]] tune MPFR for coverage tests], [ case $enableval in no) ;; yes) AC_DEFINE([MPFR_TUNE_COVERAGE], 1, [tune for coverage]) ;; *) AC_MSG_ERROR([bad value for --enable-tune-for-coverage]) ;; esac]) dnl Support for _Decimal64 and _Decimal128 (ISO/IEC TS 18661). dnl See acinclude.m4 for more information and tests. dnl FIXME: differentiate the support of _Decimal64 and _Decimal128, e.g. dnl --enable-decimal64 for _Decimal64 dnl --enable-decimal128 for _Decimal128 dnl --enable-decimal-float would explicitly enable both (or fail). dnl --disable-decimal-float would explicitly disable both. AC_ARG_ENABLE(decimal-float, [ --disable-decimal-float explicitly disable decimal floats support --enable-decimal-float build conversion functions from/to decimal floats (see INSTALL file for details) [[default=auto]]], [ case $enableval in yes|no|auto|bid|dpd|generic) ;; *) AC_MSG_ERROR([bad value for --enable-decimal-float]) ;; esac]) dnl Warning! Not to be confused with _Decimal128. Thus it is better dnl to say binary128 in the description. It can correspond to either dnl _Float128 (ISO/IEC TS 18661) or __float128 (old type name). AC_ARG_ENABLE(float128, [ --disable-float128 explicitly disable binary128 support --enable-float128 build conversion functions from/to binary128 (_Float128 or __float128) [[default=autodetect]]], [ case $enableval in yes) ;; no) ;; *) AC_MSG_ERROR([bad value for --enable-float128: yes or no]) ;; esac]) AC_ARG_ENABLE(debug-prediction, [ --enable-debug-prediction [[for developers]] enable debug of branch prediction (for x86 and x86-64 with GCC, static libs)], [ case $enableval in yes) if test "$enable_shared" != no; then AC_MSG_ERROR([--enable-debug-prediction can only work in static mode (--disable-shared)]) fi AC_DEFINE([MPFR_DEBUG_PREDICTION],1, [Enable debug of branch prediction]) ;; no) ;; *) AC_MSG_ERROR([bad value for --enable-debug-prediction: yes or no]) ;; esac]) AC_ARG_ENABLE(lto, [ --enable-lto build MPFR with link-time-optimization (experimental) [[default: no]]], [ case $enableval in yes) if test "$enable_shared" != "no"; then AC_MSG_ERROR([--enable-lto can only work in static mode (--disable-shared)]) fi enable_lto=yes ;; no) ;; *) AC_MSG_ERROR([bad value for --enable-lto: yes or no]) ;; esac]) AC_ARG_ENABLE(formally-proven-code, [ --enable-formally-proven-code use formally proven code when available (needs a C99 compiler) [[default=no]]], [ case $enableval in yes) AC_DEFINE([MPFR_WANT_PROVEN_CODE],1,[Want formally proven code]) ;; no) ;; *) AC_MSG_ERROR([bad value for --enable-formally-proven-code: yes or no]) ;; esac]) dnl Makefile.am files can use "if MINI_GMP" / ... / "endif". AM_CONDITIONAL([MINI_GMP], [test -n "$mini_gmp_path"]) dnl First, detect incompatibilities between the above configure options. AC_MSG_CHECKING([whether configure options are compatible]) if test "$enable_logging" = yes; then if test "$enable_thread_safe" = yes; then AC_MSG_RESULT([no]) AC_MSG_ERROR([enable either logging or thread-safe, not both]) fi dnl The following test is done only to output a specific error message, dnl as there would otherwise be an error due to enable_thread_safe=no. if test "$enable_shared_cache" = yes; then AC_MSG_RESULT([no]) AC_MSG_ERROR([shared cache does not work with logging support]) fi enable_thread_safe=no fi if test "$enable_shared_cache" = yes; then if test "$enable_thread_safe" = no; then AC_MSG_RESULT([no]) AC_MSG_ERROR([shared cache needs thread-safe support]) fi enable_thread_safe=yes fi AC_MSG_RESULT([yes]) dnl dnl Setup CC and CFLAGS dnl dnl ******************************************************************** dnl Check for CC and CFLAGS in gmp.h dnl Warning! The following tests must be done before Autoconf selects dnl a compiler. This means that some macros such as AC_PROG_CC and dnl AM_PROG_AR must be put after the following code. dnl We do not do this check if mini-gmp is used. if test -z "$user_redefine_cc" && \ test "$cross_compiling" != yes && \ test "${with_mini_gmp+set}" != set ; then dnl We need to guess the C preprocessor instead of using AC_PROG_CPP, dnl since AC_PROG_CPP implies AC_PROG_CC, which chooses a compiler dnl (before we have the chance to get it from gmp.h) and does some dnl checking related to this compiler (such as dependency tracking dnl options); if the compiler changes due to __GMP_CC in gmp.h, one dnl would have incorrect settings. if test -z "$GMP_CC$GMP_CFLAGS" ; then AC_MSG_CHECKING(for CC and CFLAGS in gmp.h) GMP_CC=__GMP_CC GMP_CFLAGS=__GMP_CFLAGS # /lib/cpp under Solaris doesn't support some environment variables # used by GCC, such as C_INCLUDE_PATH. If the user has set up such # environment variables, he probably wants to use them. So, let us # prefer cpp and gcc to /lib/cpp. However, note that this won't # work if GCC has been installed with versioned names only (e.g. # with cpp-5 and gcc-5). for cpp in "cpp -P" "cpp" "gcc -P -E" "gcc -E" "/lib/cpp -P" "/lib/cpp" "cc -P -E" "cc -E" "c99 -P -E" "c99 -E" "clang -E" "cl -E" "icl -E" do # Get CC echo "#include \"gmp.h\"" > conftest.c echo "MPFR_OPTION __GMP_CC" >> conftest.c $cpp $CPPFLAGS conftest.c 2> /dev/null > conftest.txt test $? -ne 0 && continue GMP_CC=`$EGREP MPFR_OPTION conftest.txt | $SED -e 's/MPFR_OPTION //g;s/ *" *//g'` # Get CFLAGS echo "#include \"gmp.h\"" > conftest.c echo "MPFR_OPTION __GMP_CFLAGS" >> conftest.c $cpp $CPPFLAGS conftest.c 2> /dev/null > conftest.txt test $? -ne 0 && continue [GMP_CFLAGS=`$EGREP MPFR_OPTION conftest.txt | $SED -e 's/[ "]-pedantic[ "]/ /g;s/MPFR_OPTION //g;s/ *" *//g'`] break done rm -f conftest* if test "x$GMP_CC" = "x__GMP_CC" || test "x$GMP_CFLAGS" = "x__GMP_CFLAGS" ; then AC_MSG_RESULT(failed) GMP_CFLAGS= GMP_CC= else AC_MSG_RESULT([CC=$GMP_CC CFLAGS=$GMP_CFLAGS]) fi fi dnl But these variables may be invalid, so we must check them first. dnl Note: we do not use AC_RUN_IFELSE, as it implies AC_PROG_CC. if test -n "$GMP_CC$GMP_CFLAGS" ; then AC_MSG_CHECKING(for CC=$GMP_CC and CFLAGS=$GMP_CFLAGS) echo "int main (void) { return 0; }" > conftest.c if $GMP_CC $GMP_CFLAGS -o conftest conftest.c 2> /dev/null ; then AC_MSG_RESULT(yes) CFLAGS=$GMP_CFLAGS CC=$GMP_CC else AC_MSG_RESULT(no) fi rm -f conftest* fi fi dnl ******************************************************************** AC_PROG_CC AC_PROG_CPP AC_LANG(C) dnl AM_PROG_AR is needed so that ar-lib (wrapper for Microsoft lib.exe) dnl gets installed by "automake -i" (if absent, "automake --warnings=all" dnl gives a warning). dnl However, if GMP chooses a non-default mode (a.k.a. ABI), this test may dnl fail. The reason is that GMP provides GMP_CC and GMP_CFLAGS to get the dnl right commands to compile (and link?) in the chosen non-default mode, dnl but does not provide a macro for the archiver (if such a special command dnl is needed). In case of failure, the user needs to either force GMP to dnl use the default mode or provide an AR variable for MPFR's configure. dnl Example: on power-aix, "gcc -c -O2 -maix64 -mpowerpc64 -mtune=power7" dnl is used, but "ar cru" fails. Solution: use AR="ar -X64" NM="nm -B -X64" dnl as said in the INSTALL file ("Notes on AIX/PowerPC"). AM_PROG_AR dnl This must done before MPFR_CONFIGS. LT_INIT(win32-dll) dnl Warning: This test is *only* for CFLAGS settings. dnl If the compiler is ICC, add some specific flags, except on MS-Windows. dnl Don't add warnings flags (Otherwise you'll get more than 20000 warnings). dnl Add -long_double flags? Don't use -pc64 ! dnl Notes (VL): dnl * With icc 10.1 20080212 on itanium, the __ICC macro is not defined, dnl even when the -icc option is used (contrary to what is documented dnl on the icc man page). dnl * When ICC is correctly detected (__ICC macro defined), unsetting dnl the GCC variable confuses libtool. See: dnl https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=485421 dnl * If need be, the gcc predefined macros __GNUC_* can be disabled dnl thanks to the -no-gcc option. dnl * Now use -mieee-fp instead of -mp (ICC 13 says: option '-mp' is dnl deprecated and will be removed in a future release.). According dnl to "icc -help", both options are equivalent; it also suggests dnl to use -fp-model instead of -mp, but what is ? Anyway dnl -mieee-fp solves the tset_d failure due to a negative zero. This dnl option has been introduced in ICC 9.0 for Linux (2005-06): dnl https://climserv.ipsl.polytechnique.fr/documentation/intel-icc/ReleaseNotes.htm AC_MSG_CHECKING(for non-MS-Windows ICC) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #if (!defined(__ICC) && !defined(__INTEL_COMPILER)) || defined(_WIN32) # error "Not a non-MS-Windows ICC" error #endif ]], [[]])],[ AC_MSG_RESULT(yes) CFLAGS="-fp_port -mieee-fp -wd1572 -wd265 -wd186 -wd239 $CFLAGS" ],[AC_MSG_RESULT(no)]) dnl If CFLAGS has not been set explicitly and the compiler is GCC, then dnl use some specific flags. But don't touch user other flags. dnl Note: This is done even when CFLAGS has been set from GMP's CFLAGS dnl (__GMP_CFLAGS macro in gmp.h) above. The consequence is that this dnl might yield a compilation failure if the -Werror option appears in dnl __GMP_CFLAGS. But in this case, since -Werror is not used by default, dnl one may expect that the user would also set CFLAGS for MPFR. if test "$test_CFLAGS" != set && test -n "$GCC"; then CFLAGS="-Wpointer-arith $CFLAGS" AC_MSG_CHECKING(whether the selected language is C++) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #if defined (__cplusplus) # error "C++" error #endif ]], [[]])],[ AC_MSG_RESULT(no) dnl The option -Wc++-compat is available in GCC 4.1.0 and newer. [ case `$CC --version | $SED -e 's/^[^ ]* //' -e 's/([^)]*) //' -e 1q` in 2.*|3.*|4.0*) ;; *) CFLAGS="-Wc++-compat $CFLAGS" ;; esac CFLAGS="-Wmissing-prototypes $CFLAGS" ] ],[ AC_MSG_RESULT(yes) CFLAGS="-Wmissing-declarations -Wno-sign-compare $CFLAGS" ]) CFLAGS="-Wall $CFLAGS" AC_MSG_NOTICE([using CFLAGS="$CFLAGS"]) fi AM_PROG_CC_C_O case $host in *-apple-darwin*) dnl This allows to take the first GMP library in the library paths, dnl whether it is dynamic or static. This behavior is more sensible, dnl in particular because it is the only way to link with a version dnl only available in static form when another version is available dnl in dynamic, and also for consistency, because the compiler will dnl take the first gmp.h found in the include paths (so, we need to dnl take a library that corresponds to this header file). This is a dnl common problem with darwin. MPFR_LD_SEARCH_PATHS_FIRST ;; esac AC_C_CONST AC_C_VOLATILE dnl Determine the endianness of integer. But since MPFR doesn't use dnl AC_CONFIG_HEADERS, configure cannot provide such information for dnl universal binaries containing variants with different endianness dnl (i.e. generic code must be used). AC_C_BIGENDIAN([AC_DEFINE(HAVE_BIG_ENDIAN)],[AC_DEFINE(HAVE_LITTLE_ENDIAN)], [true],[true]) # (Based on GMP 5.1) # clock_gettime is in librt on *-*-osf5.1 and on glibc < 2.17, so add -lrt to # TUNE_LIBS if needed (e.g. if clock_gettime is not already in the C library). # On linux (tested on x86_32, 2.6.26), clock_getres reports ns accuracy, # while in a quick test on osf, clock_getres said only 1 millisecond. old_LIBS="$LIBS" AC_SEARCH_LIBS(clock_gettime, rt, [ AC_DEFINE([HAVE_CLOCK_GETTIME],1,[Define to 1 if you have the `clock_gettime' function])]) TUNE_LIBS="$LIBS" LIBS="$old_LIBS" AC_SUBST(TUNE_LIBS) dnl Under Linux, make sure that the old dtags are used if LD_LIBRARY_PATH dnl is defined. The issue is that with the new dtags, LD_LIBRARY_PATH has dnl the precedence over the run path, so that if a compatible MPFR library dnl is installed in some directory from $LD_LIBRARY_PATH, then the tested dnl MPFR library will be this library instead of the MPFR library from the dnl build tree. Other OS with the same issue might be added later. dnl dnl References: dnl https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=859732 dnl https://lists.gnu.org/archive/html/libtool/2017-05/msg00000.html dnl dnl We need to check whether --disable-new-dtags is supported as alternate dnl linkers may be used (e.g., with tcc: CC=tcc LD=tcc). dnl case $host in *-*-linux*) if test -n "$LD_LIBRARY_PATH"; then saved_LDFLAGS="$LDFLAGS" LDFLAGS="$LDFLAGS -Wl,--disable-new-dtags" AC_MSG_CHECKING(whether --disable-new-dtags is supported by the linker) AC_LINK_IFELSE([AC_LANG_SOURCE([[ int main (void) { return 0; } ]])], [AC_MSG_RESULT(yes (use it since LD_LIBRARY_PATH is set))], [AC_MSG_RESULT(no) LDFLAGS="$saved_LDFLAGS" ]) fi ;; esac dnl MPFR_CONFIGS uses LDFLAGS, thus must be invoked after LDFLAGS has dnl been determined completely. MPFR_CONFIGS dnl dnl For mpfr-longlong.h - TODO: should be replaced (see acinclude.m4). dnl GMP_C_ATTRIBUTE_MODE dnl dnl Setup related to GMP / mini-gmp dnl if test -z "$mini_gmp_path" ; then dnl Setup for GMP dnl Check GMP Header AC_MSG_CHECKING(for gmp.h) AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ #include "gmp.h" ]])],[AC_MSG_RESULT(yes)],[ AC_MSG_RESULT(no) AC_MSG_ERROR([gmp.h can't be found, or is unusable.]) ]) dnl Configs for Windows DLLs. dnl libtool requires "-no-undefined" for win32 dll dnl dnl "-Wl,output-def" is used to get a .def file for use by MS lib to make dnl a .lib import library, described in the manual. dnl dnl Incidentally, libtool does generate an import library libmpfr.dll.a, dnl but it's "ar" format and cannot be used by the MS linker. There dnl doesn't seem to be any GNU tool for generating or converting to .lib. dnl dnl The DLL version (the number in libmpfr-*.dll.def below) must be the dnl version of the oldest supported interface (i.e. CURRENT - AGE in dnl src/Makefile.am). AC_SUBST(MPFR_LDFLAGS) AC_SUBST(LIBMPFR_LDFLAGS) case $host in *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-os2*) AC_MSG_CHECKING(for DLL/static GMP) if test "$enable_shared" = yes; then MPFR_LDFLAGS="$MPFR_LDFLAGS -no-undefined" LIBMPFR_LDFLAGS="$LIBMPFR_LDFLAGS -Wl,--output-def,.libs/libmpfr-6.dll.def" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include "gmp.h" #if !__GMP_LIBGMP_DLL # error "Dead man" error #endif ]], [[]])],[AC_MSG_RESULT(DLL)],[ AC_MSG_RESULT(static) AC_MSG_ERROR([libgmp isn't provided as a DLL: use --enable-static --disable-shared]) ]) else AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include "gmp.h" #if __GMP_LIBGMP_DLL # error "Dead man" error #endif ]], [[]])],[AC_MSG_RESULT(static)],[ AC_MSG_RESULT(DLL) AC_MSG_ERROR([libgmp is provided as a DLL: use --disable-static --enable-shared]) ]) fi ;; esac dnl Check minimal GMP version dnl We only guarantee that with a *functional* and recent enough GMP version, dnl MPFR will compile; we do not guarantee that GMP will compile. dnl In particular fat builds are broken in GMP 4.3.2 and GMP 5.0.0 dnl (at least on 64-bit Core 2 under Linux), dnl see . AC_MSG_CHECKING(for recent GMP) AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ #include "gmp.h" #if (__GNU_MP_VERSION*100+__GNU_MP_VERSION_MINOR*10 < 500) # error "GMP 5.0.0 or newer is required" error #endif ]])],[AC_MSG_RESULT(yes)],[ AC_MSG_RESULT(no) AC_MSG_ERROR([GMP 5.0.0 or newer is required]) ]) dnl Check if gmp.h is usable at link time; this may detect errors such as dnl with GMP 4.1, which uses "extern __inline__" unconditionally with all dnl GCC versions, which breaks by default with GCC 5 (this problem with dnl GMP 4.1 is no longer possible as we now require GMP 5.0.0 or newer, dnl but the same kind of problem may occur in the future). dnl Note: No linking is done against the GMP library at this time, as we dnl do not use any GMP symbol. The goal of this test is to avoid obscure dnl errors with the following gmp.h tests. AC_MSG_CHECKING(usable gmp.h at link time) AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include "gmp.h" ]],[[]])],[AC_MSG_RESULT(yes)],[ AC_MSG_RESULT(no) AC_MSG_ERROR([there is an incompatibility between gmp.h and the compiler. See 'config.log' for details.]) ]) dnl Check if we can use internal header files of GMP (only --with-gmp-build) if test "$use_gmp_build" = yes ; then AC_MSG_CHECKING(for gmp internal files) AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ #include "gmp.h" #include "gmp-impl.h" #include "longlong.h" ]])],[ AC_MSG_RESULT(yes) AC_DEFINE([MPFR_HAVE_GMP_IMPL],1,[Use GMP Internal Files]) ],[ AC_MSG_ERROR([header files gmp-impl.h and longlong.h not found]) ]) fi dnl Check for GMP_NUMB_BITS and sizeof(mp_limb_t) consistency. dnl Problems may occur if gmp.h was generated with some ABI dnl and is used with another ABI (or if nails are used). dnl This test doesn't need to link with libgmp (at least it shouldn't). AC_MSG_CHECKING(for GMP_NUMB_BITS and sizeof(mp_limb_t) consistency) AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include #include #include "gmp.h" ]], [[ if (GMP_NUMB_BITS == sizeof(mp_limb_t) * CHAR_BIT) return 0; fprintf (stderr, "GMP_NUMB_BITS = %ld\n", (long) GMP_NUMB_BITS); fprintf (stderr, "sizeof(mp_limb_t) = %ld\n", (long) sizeof(mp_limb_t)); fprintf (stderr, "sizeof(mp_limb_t) * CHAR_BIT = %ld != GMP_NUMB_BITS\n", (long) (sizeof(mp_limb_t) * CHAR_BIT)); return 1; ]])], [AC_MSG_RESULT(yes)], [ AC_MSG_RESULT(no) AC_MSG_ERROR([GMP_NUMB_BITS and sizeof(mp_limb_t) are not consistent. You probably need to change some of the GMP or MPFR compile options. See 'config.log' for details (search for GMP_NUMB_BITS).])], [AC_MSG_RESULT([cannot test])]) dnl Check if we can link with GMP AC_CHECK_LIB(gmp, __gmpz_init, [LIBS="-lgmp $LIBS"], [AC_MSG_ERROR([libgmp not found or uses a different ABI (including static vs shared). Please read the INSTALL file -- see "In case of problem".])]) dnl Check for corresponding 'gmp.h' and libgmp AC_MSG_CHECKING(if gmp.h version and libgmp version are the same) dnl We do not set LD_LIBRARY_PATH, as it is not possible to set it just dnl before the test program is run, and we do not want to affect other dnl programs (such as the compiler), because the behavior could be dnl incorrect and even have security implications. dnl WARNING! LD_RUN_PATH is not taken into account by the GNU gold ld, dnl e.g. from binutils-gold 2.22-5 under Debian; see dnl https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=660813 dnl https://sourceware.org/bugzilla/show_bug.cgi?id=13764 saved_LD_RUN_PATH="$LD_RUN_PATH" LD_RUN_PATH="${LD_RUN_PATH:+$LD_RUN_PATH$PATH_SEPARATOR}$gmp_lib_path" export LD_RUN_PATH AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include #include #include "gmp.h" ]], [[ char buffer[100]; sprintf (buffer, "%d.%d.%d", __GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL); printf ("(%s/%s) ", buffer, gmp_version); fflush (stdout); /* Also put information in config.log (stderr) */ fprintf (stderr, "gmp.h: %s / libgmp: %s\n", buffer, gmp_version); if (strcmp (buffer, gmp_version) == 0) return 0; if (__GNU_MP_VERSION_PATCHLEVEL != 0) return 1; sprintf (buffer, "%d.%d", __GNU_MP_VERSION, __GNU_MP_VERSION_MINOR); return (strcmp (buffer, gmp_version) != 0) ? 1 : 0; ]])], [AC_MSG_RESULT(yes) MPFR_CHECK_GMP MPFR_CHECK_DBL2INT_BUG MPFR_CHECK_PRINTF_SPEC MPFR_CHECK_PRINTF_GROUPFLAG], [AC_MSG_RESULT(no) AC_MSG_WARN([==========================================================]) AC_MSG_WARN(['gmp.h' and 'libgmp' seem to have different versions or]) AC_MSG_WARN([we cannot run a program linked with GMP (if you cannot]) AC_MSG_WARN([see the version numbers above). A cause may be different]) AC_MSG_WARN([GMP versions with different ABI's or the use of --with-gmp]) AC_MSG_WARN([or --with-gmp-include with a system include directory]) AC_MSG_WARN([(such as /usr/include or /usr/local/include). Another]) AC_MSG_WARN([cause may be that LD_RUN_PATH is not honored (problem]) AC_MSG_WARN([seen under OpenBSD 6.6 and with the GNU gold linker).]) AC_MSG_WARN([However, since we can't use 'libtool' inside the configure,]) AC_MSG_WARN([we can't be sure. See 'config.log' for details.]) AC_MSG_WARN([CC="$CC"]) AC_MSG_WARN([CFLAGS="$CFLAGS"]) AC_MSG_WARN([CPPFLAGS="$CPPFLAGS"]) AC_MSG_WARN([LDFLAGS="$LDFLAGS"]) AC_MSG_WARN([LIBS="$LIBS"]) AC_MSG_WARN([Temporary LD_RUN_PATH was "$LD_RUN_PATH".]) AC_MSG_WARN([==========================================================]) ],AC_MSG_RESULT([cannot test]) ) LD_RUN_PATH="$saved_LD_RUN_PATH" dnl __gmpn_sbpi1_divappr_q is an internal GMP symbol; thus its behavior dnl may change or this symbol may be removed in the future (without being dnl handled by the library versioning system, which is even worse, as this dnl can mean undetected incompatibilities in case of GMP library upgrade, dnl without rebuilding MPFR). So, this symbol must not be used, unless dnl WANT_GMP_INTERNALS is defined. Only the GMP public API should be used dnl by default, in particular by binary distributions. Moreover the check dnl below may yield an incorrect result as libtool isn't used in configure dnl (see above). AC_CHECK_FUNCS([__gmpn_sbpi1_divappr_q]) dnl same for other GMP internal functions AC_CHECK_FUNCS([__gmpn_invert_limb]) dnl mpn_rsblsh1_n(rp, up, vp, n) does {rp, n} <- 2 * {vp, n} - {up, n} AC_CHECK_FUNCS([__gmpn_rsblsh1_n]) MPFR_CHECK_MP_LIMB_T_VS_LONG MPFR_CHECK_MP_LIMB_T_VS_INTMAX else dnl Setup for mini-gmp dnl Let us make the configure script clean up the mini-gmp.* files dnl and add the symbolic links to mini-gmp.{c,h} instead of relying dnl on timestamp-based make rules, which may not work when testing dnl several mini-gmp versions (whose source can go back in time). mpfr_build_src="${ac_top_build_prefix}src" mkdir -p "$mpfr_build_src" rm -f -- "$mpfr_build_src"/mini-gmp.* for i in c h do ln -s -- "$mini_gmp_path/mini-gmp.$i" "$mpfr_build_src/mini-gmp.$i" done dnl First check whether mini-gmp defines GMP_NUMB_BITS. If it doesn't, dnl then guess the value from the size of mp_limb_t. AC_MSG_CHECKING(for GMP_NUMB_BITS) how="from mini-gmp.h" saved_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS -I$mpfr_build_src" AC_COMPUTE_INT(mini_gmp_numb_bits, [(GMP_NUMB_BITS)], [#include ], [how="not in mini-gmp.h; guessed" AC_COMPUTE_INT(mini_gmp_numb_bits, [(sizeof(mp_limb_t) * CHAR_BIT)], [#include #include ], [AC_MSG_FAILURE([cannot define GMP_NUMB_BITS])]) AC_DEFINE_UNQUOTED([GMP_NUMB_BITS], $mini_gmp_numb_bits, [number of bits in a limb]) ]) CPPFLAGS="$saved_CPPFLAGS" AC_MSG_RESULT([$mini_gmp_numb_bits bits ($how)]) fi dnl End of setup related to GMP / mini-gmp dnl The getrusage function is needed for MPFR bench (cf tools/bench) AC_CHECK_FUNCS([getrusage]) dnl Remove also many macros (AC_DEFINE), which are unused by MPFR and dnl pollute (and slow down because libtool has to parse them) the build. if test -f confdefs.h; then for i in PACKAGE_ HAVE_STRING HAVE_DLFCN_H HAVE_MEM STDC_HEADERS \ HAVE_STDLIB_H HAVE_UNISTD_H HAVE_STDC_HEADERS \ HAVE_SYS_STAT_H HAVE_SYS_TYPES_H PROTOTYPES __PROTOTYPES do $SED "/#define $i/d" < confdefs.h > confdefs.tmp mv confdefs.tmp confdefs.h done fi if $EGREP -q -e '-dev$' $srcdir/VERSION; then AC_SUBST([DATAFILES])dnl DATAFILES=`echo \`$SED -n \ 's/^ *data_check *("\(data\/[[^"]]*\)".*/tests\/\1/p' \ $srcdir/tests/*.c\`` fi dnl Output AC_CONFIG_FILES([Makefile mpfr.pc doc/Makefile src/Makefile tests/Makefile tune/Makefile src/mparam.h:src/mparam_h.in tools/bench/Makefile]) AC_OUTPUT dnl NEWS README AUTHORS Changelog