kc3-lang/gnulib/m4/exp2l.m4
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Hash : a923e066
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Date : 2025-09-10T22:55:08
math-h: Remove support for IRIX. * lib/math.in.h (FP_ILOGB0, FP_ILOGBNAN): Remove code for IRIX. (cbrtf): Test HAVE_CBRTF instead of HAVE_DECL_CBRTF. (cbrtl): Test HAVE_CBRTL instead of HAVE_DECL_CBRTL. (copysignf): Test HAVE_COPYSIGNF instead of HAVE_DECL_COPYSIGNF. (exp2f): Test HAVE_EXP2F instead of HAVE_DECL_EXP2F. (exp2): Test HAVE_EXP2 instead of HAVE_DECL_EXP2. (exp2l): Test HAVE_EXP2L instead of HAVE_DECL_EXP2L. (expm1l): Test HAVE_EXPM1L instead of HAVE_DECL_EXPM1L. (log2f): Test HAVE_LOG2F instead of HAVE_DECL_LOG2F. (log2): Test HAVE_LOG2 instead of HAVE_DECL_LOG2. (log2l): Test HAVE_LOG2L instead of HAVE_DECL_LOG2L. (remainder): Don't test HAVE_DECL_REMAINDER. (remainderl): Test HAVE_REMAINDERL instead of HAVE_DECL_REMAINDERL. (rintf): Test HAVE_RINTF instead of HAVE_DECL_RINTF. (roundf): Test HAVE_ROUNDF instead of HAVE_DECL_ROUNDF. (round): Test HAVE_ROUND instead of HAVE_DECL_ROUND. (roundl): Test HAVE_ROUNDL instead of HAVE_DECL_ROUNDL. (isnanf, isnand): Remove code for IRIX. * m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize HAVE_COPYSIGNF, HAVE_EXP2, HAVE_EXP2F, HAVE_EXP2L, HAVE_EXPM1L, HAVE_LOG2, HAVE_LOG2F, HAVE_LOG2L, HAVE_REMAINDERL, HAVE_RINTF, HAVE_ROUND, HAVE_ROUNDF, HAVE_ROUNDL. Don't initialize HAVE_DECL_CBRTF, HAVE_DECL_CBRTL, HAVE_DECL_COPYSIGNF, HAVE_DECL_EXP2, HAVE_DECL_EXP2F, HAVE_DECL_EXP2L, HAVE_DECL_EXPM1L, HAVE_DECL_LOG2, HAVE_DECL_LOG2F, HAVE_DECL_LOG2L, HAVE_DECL_REMAINDER, HAVE_DECL_REMAINDERL, HAVE_DECL_RINTF, HAVE_DECL_ROUND, HAVE_DECL_ROUNDF, HAVE_DECL_ROUNDL. * modules/math-h (Makefile.am): Substitute HAVE_COPYSIGNF, HAVE_EXP2, HAVE_EXP2F, HAVE_EXP2L, HAVE_EXPM1L, HAVE_LOG2, HAVE_LOG2F, HAVE_LOG2L, HAVE_REMAINDERL, HAVE_RINTF, HAVE_ROUND, HAVE_ROUNDF, HAVE_ROUNDL. Don't substitute HAVE_DECL_CBRTF, HAVE_DECL_CBRTL, HAVE_DECL_COPYSIGNF, HAVE_DECL_EXP2, HAVE_DECL_EXP2F, HAVE_DECL_EXP2L, HAVE_DECL_EXPM1L, HAVE_DECL_LOG2, HAVE_DECL_LOG2F, HAVE_DECL_LOG2L, HAVE_DECL_REMAINDER, HAVE_DECL_REMAINDERL, HAVE_DECL_RINTF, HAVE_DECL_ROUND, HAVE_DECL_ROUNDF, HAVE_DECL_ROUNDL. * m4/cbrtf.m4 (gl_FUNC_CBRTF_WORKS): Remove macro. (gl_FUNC_CBRTF): Don't invoke it. Don't set HAVE_DECL_CBRTF. * m4/cbrtl.m4 (gl_FUNC_CBRTL): Don't set HAVE_DECL_CBRTL. Remove test regarding cbrtl (-0.0L). * lib/cbrtl.c (cbrtl): Remove code for IRIX. * m4/copysignf.m4 (gl_FUNC_COPYSIGNF): Don't set HAVE_DECL_COPYSIGNF. * m4/exp2f.m4 (gl_FUNC_EXP2F): Don't set HAVE_DECL_EXP2F. * m4/exp2.m4 (gl_FUNC_EXP2): Don't set HAVE_DECL_EXP2. * m4/exp2l.m4 (gl_FUNC_EXP2L): Don't set HAVE_DECL_EXP2L. Remove code for IRIX. Remove test regarding exp2l (-Inf). * m4/expm1l.m4 (gl_FUNC_EXPM1L): Don't set HAVE_DECL_EXPM1L. Remove code for IRIX. * m4/log2f.m4 (gl_FUNC_LOG2F): Don't set HAVE_DECL_LOG2F. * m4/log2.m4 (gl_FUNC_LOG2): Don't set HAVE_DECL_LOG2. * lib/log2.c (log2): Remove code for IRIX. * m4/log2l.m4 (gl_FUNC_LOG2L): Don't set HAVE_DECL_LOG2L. Remove code for IRIX. * lib/log2l.c (log2l): Remove code for IRIX. * m4/remainder.m4 (gl_FUNC_REMAINDER): Don't set HAVE_DECL_REMAINDER. * m4/remainderl.m4 (gl_FUNC_REMAINDERL): Don't set HAVE_DECL_REMAINDERL. Remove code for IRIX. * m4/rintf.m4 (gl_FUNC_RINTF): Don't set HAVE_DECL_RINTF. * m4/roundf.m4 (gl_FUNC_ROUNDF): Don't set HAVE_DECL_ROUNDF. * m4/round.m4 (gl_FUNC_ROUND): Don't set HAVE_DECL_ROUND. * m4/roundl.m4 (gl_FUNC_ROUNDL): Don't set HAVE_DECL_ROUNDL.
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m4/exp2l.m4
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# exp2l.m4 # serial 16 dnl Copyright (C) 2010-2025 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. dnl This file is offered as-is, without any warranty. AC_DEFUN([gl_FUNC_EXP2L], [ m4_divert_text([DEFAULTS], [gl_exp2l_required=plain]) AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) AC_REQUIRE([gl_FUNC_EXP2]) dnl Persuade glibc <math.h> to declare exp2l(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether exp2l() exists. Assume that exp2l(), if it exists, is dnl defined in the same library as exp2(). saved_LIBS="$LIBS" LIBS="$LIBS $EXP2_LIBM" AC_CHECK_FUNCS([exp2l]) LIBS="$saved_LIBS" if test $ac_cv_func_exp2l = yes; then HAVE_EXP2L=1 EXP2L_LIBM="$EXP2_LIBM" if test $REPLACE_EXP2L = 0; then AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether exp2l works], [gl_cv_func_exp2l_works], [ saved_LIBS="$LIBS" LIBS="$LIBS $EXP2L_LIBM" AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <float.h> #include <math.h> /* Override the values of <float.h>, like done in float.in.h. */ #if defined __i386__ && (defined __BEOS__ || defined __OpenBSD__) # undef LDBL_MANT_DIG # define LDBL_MANT_DIG 64 # undef LDBL_MIN_EXP # define LDBL_MIN_EXP (-16381) # undef LDBL_MAX_EXP # define LDBL_MAX_EXP 16384 #endif #if defined __i386__ && (defined __FreeBSD__ || defined __DragonFly__) # undef LDBL_MANT_DIG # define LDBL_MANT_DIG 64 # undef LDBL_MIN_EXP # define LDBL_MIN_EXP (-16381) # undef LDBL_MAX_EXP # define LDBL_MAX_EXP 16384 #endif #if (defined _ARCH_PPC || defined _POWER) && defined _AIX && (LDBL_MANT_DIG == 106) && defined __GNUC__ # undef LDBL_MIN_EXP # define LDBL_MIN_EXP DBL_MIN_EXP #endif #undef exp2l extern #ifdef __cplusplus "C" #endif long double exp2l (long double); static long double dummy (long double x) { return 0; } int main (int argc, char *argv[]) { long double (* volatile my_exp2l) (long double) = argc ? exp2l : dummy; int result = 0; /* This test fails on NetBSD 10.0/x86_64. */ { const long double TWO_LDBL_MANT_DIG = /* 2^LDBL_MANT_DIG */ (long double) (1U << ((LDBL_MANT_DIG - 1) / 5)) * (long double) (1U << ((LDBL_MANT_DIG - 1 + 1) / 5)) * (long double) (1U << ((LDBL_MANT_DIG - 1 + 2) / 5)) * (long double) (1U << ((LDBL_MANT_DIG - 1 + 3) / 5)) * (long double) (1U << ((LDBL_MANT_DIG - 1 + 4) / 5)); long double x = 11.358L; long double err = (my_exp2l (x) * my_exp2l (- x) - 1.0L) * TWO_LDBL_MANT_DIG; if (!(err >= -100.0L && err <= 100.0L)) result |= 1; } /* This test fails on NetBSD 10.0/i386. */ { long double x = LDBL_MAX_EXP - 1; long double z = my_exp2l (x); if (z + z == z) /* isinf (z) */ result |= 2; } return result; } ]])], [gl_cv_func_exp2l_works=yes], [gl_cv_func_exp2l_works=no], [case "$host_os" in # Guess yes on glibc systems. *-gnu* | gnu*) gl_cv_func_exp2l_works="guessing yes" ;; # Guess yes on musl systems. *-musl* | midipix*) gl_cv_func_exp2l_works="guessing yes" ;; # Guess yes on native Windows. mingw* | windows*) gl_cv_func_exp2l_works="guessing yes" ;; # If we don't know, obey --enable-cross-guesses. *) gl_cv_func_exp2l_works="$gl_cross_guess_normal" ;; esac ]) LIBS="$saved_LIBS" ]) case "$gl_cv_func_exp2l_works" in *yes) ;; *) REPLACE_EXP2L=1 ;; esac fi m4_ifdef([gl_FUNC_EXP2L_IEEE], [ if test $gl_exp2l_required = ieee && test $REPLACE_EXP2L = 0; then AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CACHE_CHECK([whether exp2l works according to ISO C 99 with IEC 60559], [gl_cv_func_exp2l_ieee], [ saved_LIBS="$LIBS" LIBS="$LIBS $EXP2L_LIBM" AC_RUN_IFELSE( [AC_LANG_SOURCE([[ #ifndef __NO_MATH_INLINES # define __NO_MATH_INLINES 1 /* for glibc */ #endif #include <math.h> #undef exp2l extern #ifdef __cplusplus "C" #endif long double exp2l (long double); static long double dummy (long double x) { return 0; } static long double zero; int main (int argc, char *argv[]) { long double (* volatile my_exp2l) (long double) = argc ? exp2l : dummy; int result = 0; /* This test fails on OpenBSD 4.9, where exp2l(NaN) = 0.0. */ if (exp2l (zero / zero) == 0.0L) result |= 1; return result; } ]])], [gl_cv_func_exp2l_ieee=yes], [gl_cv_func_exp2l_ieee=no], [case "$host_os" in # Guess yes on glibc systems. *-gnu* | gnu*) gl_cv_func_exp2l_ieee="guessing yes" ;; # Guess yes on musl systems. *-musl* | midipix*) gl_cv_func_exp2l_ieee="guessing yes" ;; # Guess yes on native Windows. mingw* | windows*) gl_cv_func_exp2l_ieee="guessing yes" ;; # If we don't know, obey --enable-cross-guesses. *) gl_cv_func_exp2l_ieee="$gl_cross_guess_normal" ;; esac ]) LIBS="$saved_LIBS" ]) case "$gl_cv_func_exp2l_ieee" in *yes) ;; *) REPLACE_EXP2L=1 ;; esac fi ]) else HAVE_EXP2L=0 fi if test $HAVE_EXP2L = 0 || test $REPLACE_EXP2L = 1; then dnl Find libraries needed to link lib/exp2l.c. if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then EXP2L_LIBM="$EXP2_LIBM" else AC_REQUIRE([gl_FUNC_ISNANL]) AC_REQUIRE([gl_FUNC_ROUNDL]) AC_REQUIRE([gl_FUNC_LDEXPL]) EXP2L_LIBM= dnl Append $ISNANL_LIBM to EXP2L_LIBM, avoiding gratuitous duplicates. case " $EXP2L_LIBM " in *" $ISNANL_LIBM "*) ;; *) EXP2L_LIBM="$EXP2L_LIBM $ISNANL_LIBM" ;; esac dnl Append $ROUNDL_LIBM to EXP2L_LIBM, avoiding gratuitous duplicates. case " $EXP2L_LIBM " in *" $ROUNDL_LIBM "*) ;; *) EXP2L_LIBM="$EXP2L_LIBM $ROUNDL_LIBM" ;; esac dnl Append $LDEXPL_LIBM to EXP2L_LIBM, avoiding gratuitous duplicates. case " $EXP2L_LIBM " in *" $LDEXPL_LIBM "*) ;; *) EXP2L_LIBM="$EXP2L_LIBM $LDEXPL_LIBM" ;; esac fi fi AC_SUBST([EXP2L_LIBM]) ])