Branch
Hash :
a923e066
Author :
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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# log2f.m4
# serial 17
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_LOG2F],
[
m4_divert_text([DEFAULTS], [gl_log2f_required=plain])
AC_REQUIRE([gl_MATH_H_DEFAULTS])
AC_REQUIRE([gl_FUNC_LOG2])
dnl Persuade glibc <math.h> to declare log2f().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
dnl Determine LOG2F_LIBM.
gl_COMMON_DOUBLE_MATHFUNC([log2f])
dnl Test whether log2f() exists.
saved_LIBS="$LIBS"
LIBS="$LIBS $LOG2F_LIBM"
gl_CHECK_FUNCS_ANDROID([log2f], [[#include <math.h>]])
LIBS="$saved_LIBS"
if test $ac_cv_func_log2f = yes; then
HAVE_LOG2F=1
saved_LIBS="$LIBS"
LIBS="$LIBS $LOG2F_LIBM"
gl_FUNC_LOG2F_WORKS
LIBS="$saved_LIBS"
case "$gl_cv_func_log2f_works" in
*yes) ;;
*) REPLACE_LOG2F=1 ;;
esac
m4_ifdef([gl_FUNC_LOG2F_IEEE], [
if test $gl_log2f_required = ieee && test $REPLACE_LOG2F = 0; then
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether log2f works according to ISO C 99 with IEC 60559],
[gl_cv_func_log2f_ieee],
[
saved_LIBS="$LIBS"
LIBS="$LIBS $LOG2F_LIBM"
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
#ifndef log2f /* for Cygwin 1.7.x */
extern
#ifdef __cplusplus
"C"
#endif
float log2f (float);
#endif
/* Compare two numbers with ==.
This is a separate function in order to disable compiler optimizations. */
static int
numeric_equal (float x, float y)
{
return x == y;
}
static float dummy (float x) { return 0; }
int main (int argc, char *argv[])
{
float (* volatile my_log2f) (float) = argc ? log2f : dummy;
/* Test log2f(negative).
This test fails on NetBSD 5.1 and Solaris 10/x86_64. */
float y = my_log2f (-1.0f);
if (numeric_equal (y, y))
return 1;
return 0;
}
]])],
[gl_cv_func_log2f_ieee=yes],
[gl_cv_func_log2f_ieee=no],
[case "$host_os" in
# Guess yes on glibc systems.
*-gnu* | gnu*) gl_cv_func_log2f_ieee="guessing yes" ;;
# Guess yes on musl systems.
*-musl* | midipix*) gl_cv_func_log2f_ieee="guessing yes" ;;
# Guess yes on native Windows.
mingw* | windows*) gl_cv_func_log2f_ieee="guessing yes" ;;
# If we don't know, obey --enable-cross-guesses.
*) gl_cv_func_log2f_ieee="$gl_cross_guess_normal" ;;
esac
])
LIBS="$saved_LIBS"
])
case "$gl_cv_func_log2f_ieee" in
*yes) ;;
*) REPLACE_LOG2F=1 ;;
esac
fi
])
else
HAVE_LOG2F=0
case "$gl_cv_onwards_func_log2f" in
future*) REPLACE_LOG2F=1 ;;
esac
fi
if test $HAVE_LOG2F = 0 || test $REPLACE_LOG2F = 1; then
dnl Find libraries needed to link lib/log2f.c.
if test $ac_cv_func_log2 = yes; then
AC_DEFINE([HAVE_LOG2], [1],
[Define to 1 if the log2() function is available in libc or libm.])
LOG2F_LIBM="$LOG2_LIBM"
else
AC_REQUIRE([gl_FUNC_ISNANF])
AC_REQUIRE([gl_FUNC_FREXPF])
AC_REQUIRE([gl_FUNC_LOGF])
LOG2F_LIBM=
dnl Append $ISNANF_LIBM to LOG2F_LIBM, avoiding gratuitous duplicates.
case " $LOG2F_LIBM " in
*" $ISNANF_LIBM "*) ;;
*) LOG2F_LIBM="$LOG2F_LIBM $ISNANF_LIBM" ;;
esac
dnl Append $FREXPF_LIBM to LOG2F_LIBM, avoiding gratuitous duplicates.
case " $LOG2F_LIBM " in
*" $FREXPF_LIBM "*) ;;
*) LOG2F_LIBM="$LOG2F_LIBM $FREXPF_LIBM" ;;
esac
dnl Append $LOGF_LIBM to LOG2F_LIBM, avoiding gratuitous duplicates.
case " $LOG2F_LIBM " in
*" $LOGF_LIBM "*) ;;
*) LOG2F_LIBM="$LOG2F_LIBM $LOGF_LIBM" ;;
esac
fi
fi
])
dnl Test whether log2() works.
dnl On Cygwin 1.7.9, log2f(2^13) is not exactly 13.
AC_DEFUN([gl_FUNC_LOG2F_WORKS],
[
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether log2f works], [gl_cv_func_log2f_works],
[
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <math.h>
#ifndef log2f /* for Cygwin 1.7.x */
extern
#ifdef __cplusplus
"C"
#endif
float log2f (float);
#endif
volatile float x;
volatile float y;
int main ()
{
int result = 0;
/* This test fails on Cygwin 1.7.9. */
x = 8192.0f;
y = log2f (x);
if (!(y == 13.0f))
result |= 1;
return result;
}
]])],
[gl_cv_func_log2f_works=yes],
[gl_cv_func_log2f_works=no],
[case "$host_os" in
cygwin*) gl_cv_func_log2f_works="guessing no" ;;
# Guess yes on native Windows.
mingw* | windows*) gl_cv_func_log2f_works="guessing yes" ;;
*) gl_cv_func_log2f_works="guessing yes" ;;
esac
])
])
])