kc3-lang/gnulib/m4/modff.m4
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Hash : 9f1f81e4
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Date : 2012-05-01T22:47:37
Avoid "guessing no" guesses when cross-compiling to glibc systems. * m4/cbrtl.m4 (gl_FUNC_CBRTL): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_cbrtl_ieee to "guessing yes". * m4/ceil.m4 (gl_FUNC_CEIL): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_ceil_ieee to "guessing yes". * m4/ceilf.m4 (gl_FUNC_CEILF): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_ceilf_ieee to "guessing yes". * m4/ceill.m4 (gl_FUNC_CEILL): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_ceill_ieee to "guessing yes". * m4/chown.m4 (gl_FUNC_CHOWN): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_chown_slash_works, gl_cv_func_chown_ctime_works to "guessing yes". * m4/lchown.m4 (gl_FUNC_LCHOWN): Update. * m4/exp2l.m4 (gl_FUNC_EXP2L): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_exp2l_ieee to "guessing yes". * m4/expm1.m4 (gl_FUNC_EXPM1): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_expm1_ieee to "guessing yes". * m4/fchdir.m4 (gl_FUNC_FCHDIR): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_open_directory_works to "guessing yes". * m4/fstat.m4 (gl_FUNC_FSTAT): Update. * m4/fdopendir.m4 (gl_FUNC_FDOPENDIR): Require AC_CANONICAL_HOST. When cross-compiling to glibc systems, set gl_cv_func_fdopendir_works to "guessing yes". * m4/floor.m4 (gl_FUNC_FLOOR): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_floor_ieee to "guessing yes". * m4/floorf.m4 (gl_FUNC_FLOORF): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_floorf_ieee to "guessing yes". * m4/fmod.m4 (gl_FUNC_FMOD): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_fmod_ieee to "guessing yes". * m4/fmodf.m4 (gl_FUNC_FMODF): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_fmodf_ieee to "guessing yes". * m4/fmodl.m4 (gl_FUNC_FMODL): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_fmodl_ieee to "guessing yes". * m4/getgroups.m4 (gl_FUNC_GETGROUPS): Require AC_CANONICAL_HOST. When cross-compiling to glibc systems, set gl_cv_func_getgroups_works to "guessing yes". * m4/hypot.m4 (gl_FUNC_HYPOT): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_hypot_ieee to "guessing yes". * m4/hypotf.m4 (gl_FUNC_HYPOTF): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_hypotf_ieee to "guessing yes". * m4/hypotl.m4 (gl_FUNC_HYPOTL): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_hypotl_ieee to "guessing yes". * m4/link.m4 (gl_FUNC_LINK): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_link_works to "guessing yes". * m4/log.m4 (gl_FUNC_LOG): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_log_ieee to "guessing yes". * m4/logf.m4 (gl_FUNC_LOGF): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_logf_ieee to "guessing yes". * m4/log10.m4 (gl_FUNC_LOG10): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_log10_ieee to "guessing yes". * m4/log10f.m4 (gl_FUNC_LOG10F): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_log10f_ieee to "guessing yes". * m4/log1p.m4 (gl_FUNC_LOG1P): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_log1p_ieee to "guessing yes". * m4/log1pf.m4 (gl_FUNC_LOG1PF): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_log1pf_ieee to "guessing yes". * m4/log1pl.m4 (gl_FUNC_LOG1PL): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_log1pl_ieee to "guessing yes". * m4/log2.m4 (gl_FUNC_LOG2): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_log2_ieee to "guessing yes". * m4/log2f.m4 (gl_FUNC_LOG2F): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_log2f_ieee to "guessing yes". * m4/mkdir.m4 (gl_FUNC_MKDIR): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_mkdir_trailing_slash_works, gl_cv_func_mkdir_trailing_dot_works to "guessing yes". * m4/mkfifo.m4 (gl_FUNC_MKFIFO): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_mkfifo_works to "guessing yes". * m4/mknod.m4 (gl_FUNC_MKNOD): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_mknod_works to "guessing yes". * m4/mkstemp.m4 (gl_FUNC_MKSTEMP): Require AC_CANONICAL_HOST. When cross-compiling to glibc systems, set gl_cv_func_working_mkstemp to "guessing yes". * m4/modf.m4 (gl_FUNC_MODF): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_modf_ieee to "guessing yes". * m4/modff.m4 (gl_FUNC_MODFF): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_modff_ieee to "guessing yes". * m4/modfl.m4 (gl_FUNC_MODFL): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_modfl_ieee to "guessing yes". * m4/putenv.m4 (gl_FUNC_PUTENV): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_svid_putenv to "guessing yes". * m4/readlink.m4 (gl_FUNC_READLINK): Require AC_CANONICAL_HOST. When cross-compiling to glibc systems, set gl_cv_func_readlink_works to "guessing yes". * m4/remainder.m4 (gl_FUNC_REMAINDER): Require AC_CANONICAL_HOST. When cross-compiling to glibc systems, set gl_cv_func_remainder_ieee to "guessing yes". * m4/remainderf.m4 (gl_FUNC_REMAINDERF): Require AC_CANONICAL_HOST. When cross-compiling to glibc systems, set gl_cv_func_remainderf_ieee to "guessing yes". * m4/remainderl.m4 (gl_FUNC_REMAINDERL): Require AC_CANONICAL_HOST. When cross-compiling to glibc systems, set gl_cv_func_remainderl_ieee to "guessing yes". * m4/rmdir.m4 (gl_FUNC_RMDIR): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_rmdir_works to "guessing yes". * m4/unlink.m4 (gl_FUNC_UNLINK): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_unlink_honors_slashes, gl_cv_func_unlink_parent_fails to "guessing yes". * m4/remove.m4 (gl_FUNC_REMOVE): Update. * m4/rename.m4 (gl_FUNC_RENAME): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_rename_slash_dst_works, gl_cv_func_rename_slash_src_works, gl_cv_func_rename_link_works, gl_cv_func_rename_dest_works to "guessing yes". * m4/round.m4 (gl_FUNC_ROUND): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_round_ieee to "guessing yes". * m4/roundf.m4 (gl_FUNC_ROUNDF): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_roundf_ieee to "guessing yes". * m4/roundl.m4 (gl_FUNC_ROUNDL): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_roundl_ieee to "guessing yes". * m4/setenv.m4 (gl_FUNC_SETENV): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_setenv_works to "guessing yes". (gl_FUNC_UNSETENV): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_unsetenv_works to "guessing yes". * m4/sleep.m4 (gl_FUNC_SLEEP): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_sleep_works to "guessing yes". * m4/stat.m4 (gl_FUNC_STAT): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_stat_file_slash to "guessing yes". * m4/symlink.m4 (gl_FUNC_SYMLINK): Require AC_CANONICAL_HOST. When cross-compiling to glibc systems, set gl_cv_func_symlink_works to "guessing yes". * m4/trunc.m4 (gl_FUNC_TRUNC): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_trunc_ieee to "guessing yes". * m4/truncf.m4 (gl_FUNC_TRUNCF): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_truncf_ieee to "guessing yes". * m4/truncl.m4 (gl_FUNC_TRUNCL): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_truncl_ieee to "guessing yes". * m4/usleep.m4 (gl_FUNC_USLEEP): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_usleep_works to "guessing yes". * m4/utimens.m4 (gl_UTIMENS): Require AC_CANONICAL_HOST. When cross- compiling to glibc systems, set gl_cv_func_futimesat_works to "guessing yes".
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m4/modff.m4
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# modff.m4 serial 5 dnl Copyright (C) 2011-2012 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_MODFF], [ m4_divert_text([DEFAULTS], [gl_modff_required=plain]) AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_MODF]) dnl Persuade glibc <math.h> to declare modff(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether modff() exists. We cannot assume that modff(), if it dnl exists, is defined in the same library as modf(). This is not the case dnl on FreeBSD, NetBSD, OpenBSD. gl_MATHFUNC([modff], [float], [(float, float *)]) if test $gl_cv_func_modff_no_libm = yes \ || test $gl_cv_func_modff_in_libm = yes; then : m4_ifdef([gl_FUNC_MODFF_IEEE], [ if test $gl_modff_required = ieee && test $REPLACE_MODFF = 0; then AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether modff works according to ISO C 99 with IEC 60559], [gl_cv_func_modff_ieee], [ save_LIBS="$LIBS" LIBS="$LIBS $MODFF_LIBM" AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> ]gl_FLOAT_MINUS_ZERO_CODE[ ]gl_FLOAT_SIGNBIT_CODE[ /* Compare two numbers with ==. This is a separate function because IRIX 6.5 "cc -O" miscompiles an 'x == x' test. */ static int numeric_equal (float x, float y) { return x == y; } static float dummy (float x, float *iptr) { return 0; } float zero; float minus_one = - 1.0f; int main (int argc, char *argv[]) { float (*my_modff) (float, float *) = argc ? modff : dummy; int result = 0; float i; float f; /* Test modff(NaN,...). This test fails on NetBSD 5.1, OpenBSD 4.9, Solaris 9, Cygwin. */ f = my_modff (zero / zero, &i); if (numeric_equal (f, f)) result |= 1; /* Test modff(-Inf,...). This test fails on IRIX 6.5, OSF/1 5.1, mingw. */ f = my_modff (minus_one / zero, &i); if (!(f == 0.0f) || (signbitf (minus_zerof) && !signbitf (f))) result |= 2; return result; } ]])], [gl_cv_func_modff_ieee=yes], [gl_cv_func_modff_ieee=no], [case "$host_os" in # Guess yes on glibc systems. *-gnu*) gl_cv_func_modff_ieee="guessing yes" ;; # If we don't know, assume the worst. *) gl_cv_func_modff_ieee="guessing no" ;; esac ]) LIBS="$save_LIBS" ]) case "$gl_cv_func_modff_ieee" in *yes) ;; *) REPLACE_MODFF=1 ;; esac fi ]) else HAVE_MODFF=0 fi if test $HAVE_MODFF = 0 || test $REPLACE_MODFF = 1; then dnl Find libraries needed to link lib/modff.c. MODFF_LIBM="$MODF_LIBM" fi AC_SUBST([MODFF_LIBM]) ])