X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=libgfortran%2Facinclude.m4;h=5b0c094e71697e73a3845cf1f22fae326dc90c30;hb=324276ff9b1aa5128e5cb9f5d43182d1ebab0752;hp=ebee89df8563381277d35ba3a4034621d1ba12e4;hpb=d49ec2d1a8a4d62fc0175f93b31ac9db910fd617;p=gcc.git diff --git a/libgfortran/acinclude.m4 b/libgfortran/acinclude.m4 index ebee89df856..5b0c094e716 100644 --- a/libgfortran/acinclude.m4 +++ b/libgfortran/acinclude.m4 @@ -1,77 +1,25 @@ -dnl Check: -dnl * If we have gettimeofday; -dnl * If we have struct timezone for use in calling it; -dnl * If calling it with a timezone pointer actually works -- this is deemed -dnl obsolete or undefined on some systems which say you should use a null -dnl pointer -- and undefine HAVE_TIMEZONE if so; -dnl * Whether it only takes one arg. -AC_DEFUN([LIBGFOR_GETTIMEOFDAY], [ - AC_CHECK_FUNCS(gettimeofday) - if test "$ac_cv_func_gettimeofday" = yes; then - AC_CACHE_CHECK([for struct timezone], gfor_cv_struct_timezone, - [AC_TRY_COMPILE([#include ], - [struct timezone tz;], - gfor_cv_struct_timezone=yes, gfor_cv_struct_timezone=no)]) - if test $gfor_cv_struct_timezone = yes; then - dnl It may be that we can't call gettimeofday with a non-null pointer. - dnl In that case we'll lie about struct timezone. - AC_TRY_RUN([ -#ifdef TIME_WITH_SYS_TIME -#include -#include -#else -#ifdef HAVE_SYS_TIME_H -#include -#else -#include -#endif -#endif -main () -{ - struct timeval time; - struct timezone dummy; - if (gettimeofday (&time, &dummy)) - exit (1); - else - exit (0); -}], - [gfor_have_struct_timezone=yes], [gfor_have_struct_timezone=no], - [gfor_have_struct_timezone=yes]) - if test $gfor_have_struct_timezone = yes; then - AC_DEFINE(HAVE_TIMEZONE, 1, [Do we have struct timezone]) - fi - fi - AC_REQUIRE([AC_HEADER_TIME]) - AC_CACHE_CHECK([whether gettimeofday can accept two arguments], - emacs_cv_gettimeofday_two_arguments, - [AC_TRY_LINK([ -#ifdef TIME_WITH_SYS_TIME -#include -#include -#else -#ifdef HAVE_SYS_TIME_H -#include -#else -#include -#endif -#endif - ], - [ - struct timeval time; -#ifdef HAVE_TIMEZONE - struct timezone dummy; -#define DUMMY &dummy -#else -#define DUMMY NULL -#endif - gettimeofday (&time, DUMMY);], - emacs_cv_gettimeofday_two_arguments=yes, - emacs_cv_gettimeofday_two_arguments=no)]) - if test $emacs_cv_gettimeofday_two_arguments = no; then - AC_DEFINE(GETTIMEOFDAY_ONE_ARGUMENT, 1, - [Does gettimeofday take a single argument]) - fi - fi]) +m4_include(../config/acx.m4) +m4_include(../config/no-executables.m4) +m4_include(../config/math.m4) +m4_include(../config/ax_check_define.m4) +m4_include(../config/enable.m4) +m4_include(../config/cet.m4) + +dnl Check that we have a working GNU Fortran compiler +AC_DEFUN([LIBGFOR_WORKING_GFORTRAN], [ +AC_MSG_CHECKING([whether the GNU Fortran compiler is working]) +AC_LANG_PUSH([Fortran]) +AC_COMPILE_IFELSE([[ + program foo + real, parameter :: bar = sin (12.34 / 2.5) + end program foo]], + [AC_MSG_RESULT([yes])], + [AC_MSG_RESULT([no]) + AC_MSG_ERROR([GNU Fortran is not working; please report a bug in http://gcc.gnu.org/bugzilla, attaching $PWD/config.log]) + ]) +AC_LANG_POP([Fortran]) +]) + sinclude(../libtool.m4) dnl The lines below arrange for aclocal not to bring an installed @@ -83,3 +31,482 @@ AC_DEFUN([AC_LIBTOOL_DLOPEN]) AC_DEFUN([AC_PROG_LD]) ]) +dnl Check whether the target supports hidden visibility. +AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [ + AC_CACHE_CHECK([whether the target supports hidden visibility], + libgfor_cv_have_attribute_visibility, [ + save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -Werror" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[void __attribute__((visibility("hidden"))) foo(void) { }]], [])], + libgfor_cv_have_attribute_visibility=yes, + libgfor_cv_have_attribute_visibility=no) + CFLAGS="$save_CFLAGS"]) + if test $libgfor_cv_have_attribute_visibility = yes; then + AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1, + [Define to 1 if the target supports __attribute__((visibility(...))).]) + fi]) + +dnl Check whether the target supports symbol aliases. +AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_ALIAS], [ + AC_CACHE_CHECK([whether the target supports symbol aliases], + libgfor_cv_have_attribute_alias, [ + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +void foo(void) { } +extern void bar(void) __attribute__((alias("foo")));]], + [[bar();]])], libgfor_cv_have_attribute_alias=yes, libgfor_cv_have_attribute_alias=no)]) + if test $libgfor_cv_have_attribute_alias = yes; then + AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1, + [Define to 1 if the target supports __attribute__((alias(...))).]) + fi]) + +dnl Check whether the target supports __atomic_fetch_add. +AC_DEFUN([LIBGFOR_CHECK_ATOMIC_FETCH_ADD], [ + AC_CACHE_CHECK([whether the target supports __atomic_fetch_add], + libgfor_cv_have_atomic_fetch_add, [ + AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foovar = 0;]], [[ +if (foovar <= 0) return __atomic_fetch_add (&foovar, 1, __ATOMIC_ACQ_REL); +if (foovar > 10) return __atomic_add_fetch (&foovar, -1, __ATOMIC_ACQ_REL);]])], + libgfor_cv_have_atomic_fetch_add=yes, libgfor_cv_have_atomic_fetch_add=no)]) + if test $libgfor_cv_have_atomic_fetch_add = yes; then + AC_DEFINE(HAVE_ATOMIC_FETCH_ADD, 1, + [Define to 1 if the target supports __atomic_fetch_add]) + fi]) + +dnl Check for pragma weak. +AC_DEFUN([LIBGFOR_GTHREAD_WEAK], [ + AC_CACHE_CHECK([whether pragma weak works], + libgfor_cv_have_pragma_weak, [ + gfor_save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -Wunknown-pragmas" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ +void foo (void); +#pragma weak foo +]], [[if (foo) foo ();]])], + libgfor_cv_have_pragma_weak=yes, libgfor_cv_have_pragma_weak=no)]) + if test $libgfor_cv_have_pragma_weak = yes; then + AC_DEFINE(SUPPORTS_WEAK, 1, + [Define to 1 if the target supports #pragma weak]) + fi + case "$host" in + *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* | *-*-musl* ) + AC_DEFINE(GTHREAD_USE_WEAK, 0, + [Define to 0 if the target shouldn't use #pragma weak]) + ;; + esac]) + +dnl Check whether target effectively supports weakref +AC_DEFUN([LIBGFOR_CHECK_WEAKREF], [ + AC_CACHE_CHECK([whether the target supports weakref], + libgfor_cv_have_weakref, [ + save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -Wunknown-pragmas -Werror" + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +static int mytoto (int) __attribute__((__weakref__("toto"))); +]], [[return (mytoto != 0);]])], + libgfor_cv_have_weakref=yes, libgfor_cv_have_weakref=no) + CFLAGS="$save_CFLAGS"]) + if test $libgfor_cv_have_weakref = yes; then + AC_DEFINE(SUPPORTS_WEAKREF, 1, + [Define to 1 if the target supports weakref]) + fi]) + +dnl Check whether target can unlink a file still open. +AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [ + AC_CACHE_CHECK([whether the target can unlink an open file], + libgfor_cv_have_unlink_open_file, [ + AC_RUN_IFELSE([AC_LANG_SOURCE([[ +#include +#include +#include +#include + +int main () +{ + int fd; + + fd = open ("testfile", O_RDWR | O_CREAT, S_IWUSR | S_IRUSR); + if (fd <= 0) + return 0; + if (unlink ("testfile") == -1) + return 1; + write (fd, "This is a test\n", 15); + close (fd); + + if (open ("testfile", O_RDONLY) == -1 && errno == ENOENT) + return 0; + else + return 1; +}]])], libgfor_cv_have_unlink_open_file=yes, libgfor_cv_have_unlink_open_file=no, [ +case "${target}" in + *mingw*) libgfor_cv_have_unlink_open_file=no ;; + *) libgfor_cv_have_unlink_open_file=yes;; +esac])]) +if test x"$libgfor_cv_have_unlink_open_file" = xyes; then + AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.]) +fi]) + +dnl Check whether CRLF is the line terminator +AC_DEFUN([LIBGFOR_CHECK_CRLF], [ + AC_CACHE_CHECK([whether the target has CRLF as line terminator], + libgfor_cv_have_crlf, [ + AC_RUN_IFELSE([AC_LANG_SOURCE([[ +/* This test program should exit with status 0 if system uses a CRLF as + line terminator, and status 1 otherwise. + Since it is used to check for mingw systems, and should return 0 in any + other case, in case of a failure we will not use CRLF. */ +#include +#include +#include +#include + +int main () +{ +#ifndef O_BINARY + exit(1); +#else + int fd, bytes; + char buff[5]; + + fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU); + if (fd < 0) + exit(1); + if (write (fd, "\n", 1) < 0) + perror ("write"); + + close (fd); + + if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0) + exit(1); + bytes = read (fd, buff, 5); + if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n') + exit(0); + else + exit(1); +#endif +}]])], libgfor_cv_have_crlf=yes, libgfor_cv_have_crlf=no, [ +case "${target}" in + *mingw*) libgfor_cv_have_crlf=yes ;; + *) libgfor_cv_have_crlf=no;; +esac])]) +if test x"$libgfor_cv_have_crlf" = xyes; then + AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.]) +fi]) + +dnl Check whether the st_ino and st_dev stat fields taken together uniquely +dnl identify the file within the system. This is should be true for POSIX +dnl systems; it is known to be false on mingw32. +AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [ + AC_CACHE_CHECK([whether the target stat is reliable], + libgfor_cv_have_working_stat, [ + AC_RUN_IFELSE([AC_LANG_SOURCE([[ +#include +#include +#include +#include + +int main () +{ + FILE *f, *g; + struct stat st1, st2; + + f = fopen ("foo", "w"); + g = fopen ("bar", "w"); + if (stat ("foo", &st1) != 0 || stat ("bar", &st2)) + return 1; + if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino) + return 1; + fclose(f); + fclose(g); + return 0; +}]])], libgfor_cv_have_working_stat=yes, libgfor_cv_have_working_stat=no, [ +case "${target}" in + *mingw*) libgfor_cv_have_working_stat=no ;; + *) libgfor_cv_have_working_stat=yes;; +esac])]) +if test x"$libgfor_cv_have_working_stat" = xyes; then + AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.]) +fi]) + +dnl Checks for fpsetmask function. +AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [ + AC_CACHE_CHECK([whether fpsetmask is present], libgfor_cv_have_fpsetmask, [ + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +#if HAVE_FLOATINGPOINT_H +# include +#endif /* HAVE_FLOATINGPOINT_H */ +#if HAVE_IEEEFP_H +# include +#endif /* HAVE_IEEEFP_H */]],[[fpsetmask(0);]])], + eval "libgfor_cv_have_fpsetmask=yes", eval "libgfor_cv_have_fpsetmask=no") + ]) + if test x"$libgfor_cv_have_fpsetmask" = xyes; then + have_fpsetmask=yes + AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.]) + fi +]) + +dnl Check whether we have a mingw that provides a __mingw_snprintf function +AC_DEFUN([LIBGFOR_CHECK_MINGW_SNPRINTF], [ + AC_CACHE_CHECK([whether __mingw_snprintf is present], libgfor_cv_have_mingw_snprintf, [ + AC_LINK_IFELSE([AC_LANG_PROGRAM([[ +#include +extern int __mingw_snprintf (char *, size_t, const char *, ...); +]],[[ +__mingw_snprintf (NULL, 0, "%d\n", 1); +]])], + eval "libgfor_cv_have_mingw_snprintf=yes", eval "libgfor_cv_have_mingw_snprintf=no") + ]) + if test x"$libgfor_cv_have_mingw_snprintf" = xyes; then + AC_DEFINE(HAVE_MINGW_SNPRINTF, 1, [Define if you have __mingw_snprintf.]) + fi +]) + +dnl Check whether we have a __float128 type +AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [ + LIBQUADSPEC= + + if test "x$enable_libquadmath_support" != xno; then + + AC_CACHE_CHECK([whether we have a usable __float128 type], + libgfor_cv_have_float128, [ + GCC_TRY_COMPILE_OR_LINK([ + typedef _Complex float __attribute__((mode(TC))) __complex128; + + __float128 foo (__float128 x) + { + + __complex128 z1, z2; + + z1 = x; + z2 = x / 7.Q; + z2 /= z1; + + return (__float128) z2; + } + + __float128 bar (__float128 x) + { + return x * __builtin_huge_valq (); + } + ],[ + foo (1.2Q); + bar (1.2Q); + ],[ + libgfor_cv_have_float128=yes + ],[ + libgfor_cv_have_float128=no +])]) + + if test "x$libgfor_cv_have_float128" = xyes; then + AC_DEFINE(HAVE_FLOAT128, 1, [Define if have a usable __float128 type.]) + + dnl Check whether -Wl,--as-needed resp. -Wl,-zignore is supported + dnl + dnl Turn warnings into error to avoid testsuite breakage. So enable + dnl AC_LANG_WERROR, but there's currently (autoconf 2.64) no way to turn + dnl it off again. As a workaround, save and restore werror flag like + dnl AC_PATH_XTRA. + dnl Cf. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01889.html + ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag + AC_CACHE_CHECK([whether --as-needed/-z ignore works], + [libgfor_cv_have_as_needed], + [ + # Test for native Solaris options first. + # No whitespace after -z to pass it through -Wl. + libgfor_cv_as_needed_option="-zignore" + libgfor_cv_no_as_needed_option="-zrecord" + save_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS -Wl,$libgfor_cv_as_needed_option -lm -Wl,$libgfor_cv_no_as_needed_option" + libgfor_cv_have_as_needed=no + AC_LANG_WERROR + AC_LINK_IFELSE([AC_LANG_PROGRAM([])], + [libgfor_cv_have_as_needed=yes], + [libgfor_cv_have_as_needed=no]) + LDFLAGS="$save_LDFLAGS" + if test "x$libgfor_cv_have_as_needed" = xno; then + libgfor_cv_as_needed_option="--as-needed" + libgfor_cv_no_as_needed_option="--no-as-needed" + save_LDFLAGS="$LDFLAGS" + LDFLAGS="$LDFLAGS -Wl,$libgfor_cv_as_needed_option -lm -Wl,$libgfor_cv_no_as_needed_option" + libgfor_cv_have_as_needed=no + AC_LANG_WERROR + AC_LINK_IFELSE([AC_LANG_PROGRAM([])], + [libgfor_cv_have_as_needed=yes], + [libgfor_cv_have_as_needed=no]) + LDFLAGS="$save_LDFLAGS" + fi + ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag + ]) + + dnl For static libgfortran linkage, depend on libquadmath only if needed. + if test "x$libgfor_cv_have_as_needed" = xyes; then + LIBQUADSPEC="%{static-libgfortran:$libgfor_cv_as_needed_option} -lquadmath %{static-libgfortran:$libgfor_cv_no_as_needed_option}" + else + LIBQUADSPEC="-lquadmath" + fi + if test -f ../libquadmath/libquadmath.la; then + LIBQUADLIB=../libquadmath/libquadmath.la + LIBQUADLIB_DEP=../libquadmath/libquadmath.la + LIBQUADINCLUDE='-I$(srcdir)/../libquadmath' + else + LIBQUADLIB="-lquadmath" + LIBQUADLIB_DEP= + LIBQUADINCLUDE= + fi + fi + else + # for --disable-quadmath + LIBQUADLIB= + LIBQUADLIB_DEP= + LIBQUADINCLUDE= + fi + + dnl For the spec file + AC_SUBST(LIBQUADSPEC) + AC_SUBST(LIBQUADLIB) + AC_SUBST(LIBQUADLIB_DEP) + AC_SUBST(LIBQUADINCLUDE) + + dnl We need a conditional for the Makefile + AM_CONDITIONAL(LIBGFOR_BUILD_QUAD, [test "x$libgfor_cv_have_float128" = xyes]) +]) + + +dnl Check whether we have strerror_r +AC_DEFUN([LIBGFOR_CHECK_STRERROR_R], [ + dnl Check for three-argument POSIX version of strerror_r + ac_save_CFLAGS="$CFLAGS" + CFLAGS="-Wimplicit-function-declaration -Werror" + AC_TRY_COMPILE([#define _GNU_SOURCE 1 + #include + #include ], + [char s[128]; strerror_r(5, s, 128);], + AC_DEFINE(HAVE_STRERROR_R, 1, + [Define if strerror_r is available in .]),) + CFLAGS="$ac_save_CFLAGS" + + dnl Check for two-argument version of strerror_r (e.g. for VxWorks) + ac_save_CFLAGS="$CFLAGS" + CFLAGS="-Wimplicit-function-declaration -Werror" + AC_TRY_COMPILE([#define _GNU_SOURCE 1 + #include + #include ], + [char s[128]; strerror_r(5, s);], + AC_DEFINE(HAVE_STRERROR_R_2ARGS, 1, + [Define if strerror_r takes two arguments and is available in .]),) + CFLAGS="$ac_save_CFLAGS" +]) + +dnl Check for AVX + +AC_DEFUN([LIBGFOR_CHECK_AVX], [ + ac_save_CFLAGS="$CFLAGS" + CFLAGS="-O2 -mavx" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ + void _mm256_zeroall (void) + { + __builtin_ia32_vzeroall (); + }]], [[]])], + AC_DEFINE(HAVE_AVX, 1, + [Define if AVX instructions can be compiled.]), + []) + CFLAGS="$ac_save_CFLAGS" +]) + +dnl Check for AVX2 + +AC_DEFUN([LIBGFOR_CHECK_AVX2], [ + ac_save_CFLAGS="$CFLAGS" + CFLAGS="-O2 -mavx2" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ + typedef long long __v4di __attribute__ ((__vector_size__ (32))); + __v4di + mm256_is32_andnotsi256 (__v4di __X, __v4di __Y) + { + return __builtin_ia32_andnotsi256 (__X, __Y); + }]], [[]])], + AC_DEFINE(HAVE_AVX2, 1, + [Define if AVX2 instructions can be compiled.]), + []) + CFLAGS="$ac_save_CFLAGS" +]) + +dnl Check for AVX512f + +AC_DEFUN([LIBGFOR_CHECK_AVX512F], [ + ac_save_CFLAGS="$CFLAGS" + CFLAGS="-O2 -mavx512f" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ + typedef double __m512d __attribute__ ((__vector_size__ (64))); + __m512d _mm512_add (__m512d a) + { + __m512d b = __builtin_ia32_addpd512_mask (a, a, a, 1, 4); + /* For -m64/-mx32 also verify that code will work even if + the target uses call saved zmm16+ and needs to emit + unwind info for them (e.g. on mingw). See PR79127. */ +#ifdef __x86_64__ + asm volatile ("" : : : "zmm16", "zmm17", "zmm18", "zmm19"); +#endif + return b; + }]], [[]])], + AC_DEFINE(HAVE_AVX512F, 1, + [Define if AVX512f instructions can be compiled.]), + []) + CFLAGS="$ac_save_CFLAGS" +]) + +dnl Check for FMA3 +dnl +AC_DEFUN([LIBGFOR_CHECK_FMA3], [ + ac_save_CFLAGS="$CFLAGS" + CFLAGS="-O2 -mfma -mno-fma4" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ + typedef float __m128 __attribute__ ((__vector_size__ (16))); + typedef float __v4sf __attribute__ ((__vector_size__ (16))); + __m128 _mm_macc_ps(__m128 __A, __m128 __B, __m128 __C) + { + return (__m128) __builtin_ia32_vfmaddps ((__v4sf)__A, + (__v4sf)__B, + (__v4sf)__C); + }]], [[]])], + AC_DEFINE(HAVE_FMA3, 1, + [Define if FMA3 instructions can be compiled.]), + []) + CFLAGS="$ac_save_CFLAGS" +]) + +dnl Check for FMA4 +dnl +AC_DEFUN([LIBGFOR_CHECK_FMA4], [ + ac_save_CFLAGS="$CFLAGS" + CFLAGS="-O2 -mfma4 -mno-fma" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ + typedef float __m128 __attribute__ ((__vector_size__ (16))); + typedef float __v4sf __attribute__ ((__vector_size__ (16))); + __m128 _mm_macc_ps(__m128 __A, __m128 __B, __m128 __C) + { + return (__m128) __builtin_ia32_vfmaddps ((__v4sf)__A, + (__v4sf)__B, + (__v4sf)__C); + }]], [[]])], + AC_DEFINE(HAVE_FMA4, 1, + [Define if FMA4 instructions can be compiled.]), + []) + CFLAGS="$ac_save_CFLAGS" +]) + +dnl Check for -mprefer-avx128 +dnl This also defines an automake conditional. +AC_DEFUN([LIBGFOR_CHECK_AVX128], [ + ac_save_CFLAGS="$CFLAGS" + CFLAGS="-O2 -mavx -mprefer-avx128" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ + void foo() + { + }]], [[]])], + AC_DEFINE(HAVE_AVX128, 1, + [Define if -mprefer-avx128 is supported.]) + AM_CONDITIONAL([HAVE_AVX128],true), + [AM_CONDITIONAL([HAVE_AVX128],false)]) + CFLAGS="$ac_save_CFLAGS" +])