Hash :
86a9695e
Author :
Date :
2023-02-17T16:24:34
Improve cross-compilation from midipix. Reported by Ørjan Malde <red@foxi.me> at <https://lists.gnu.org/archive/html/bug-gnulib/2023-02/msg00131.html>. Since midipix consists of musl libc based on an emulation of Linux system calls, for pure libc functionality it can be treated like musl libc. * m4/calloc.m4 (_AC_FUNC_CALLOC_IF): Treat midipix like systems with musl libc. * m4/cbrtl.m4 (gl_FUNC_CBRTL): Likewise. * m4/ceil.m4 (gl_FUNC_CEIL): Likewise. * m4/ceilf.m4 (gl_FUNC_CEILF): Likewise. * m4/ceill.m4 (gl_FUNC_CEILL): Likewise. * m4/exp2l.m4 (gl_FUNC_EXP2L): Likewise. * m4/expl.m4 (gl_FUNC_EXPL): Likewise. * m4/expm1.m4 (gl_FUNC_EXPM1): Likewise. * m4/expm1f.m4 (gl_FUNC_EXPM1F): Likewise. * m4/expm1l.m4 (gl_FUNC_EXPM1L): Likewise. * m4/fclose.m4 (gl_FUNC_FCLOSE_STDIN): Likewise. * m4/fdopendir.m4 (gl_FUNC_FDOPENDIR): Likewise. * m4/ffsll.m4 (gl_FUNC_FFSLL): Likewise. * m4/floor.m4 (gl_FUNC_FLOOR): Likewise. * m4/floorf.m4 (gl_FUNC_FLOORF): Likewise. * m4/fmod.m4 (gl_FUNC_FMOD): Likewise. * m4/fmodf.m4 (gl_FUNC_FMODF): Likewise. * m4/fmodl.m4 (gl_FUNC_FMODL): Likewise. * m4/fnmatch.m4 (gl_FUNC_FNMATCH_POSIX): Likewise. * m4/fopen.m4 (gl_FUNC_FOPEN_GNU): Likewise. * m4/fpurge.m4 (gl_FUNC_FPURGE): Likewise. * m4/getdelim.m4 (gl_FUNC_GETDELIM): Likewise. * m4/getline.m4 (gl_FUNC_GETLINE): Likewise. * m4/hypot.m4 (gl_FUNC_HYPOT): Likewise. * m4/hypotf.m4 (gl_FUNC_HYPOTF): Likewise. * m4/hypotl.m4 (gl_FUNC_HYPOTL): Likewise. * m4/iconv_open-utf.m4 (gl_FUNC_ICONV_OPEN_UTF_SUPPORT): Likewise. * m4/log.m4 (gl_FUNC_LOG): Likewise. * m4/log10.m4 (gl_FUNC_LOG10): Likewise. * m4/log10f.m4 (gl_FUNC_LOG10F): Likewise. * m4/log10l.m4 (gl_FUNC_LOG10L_WORKS): Likewise. * m4/log1p.m4 (gl_FUNC_LOG1P): Likewise. * m4/log1pf.m4 (gl_FUNC_LOG1PF): Likewise. * m4/log1pl.m4 (gl_FUNC_LOG1PL, gl_FUNC_LOG1PL_WORKS): Likewise. * m4/log2.m4 (gl_FUNC_LOG2): Likewise. * m4/log2f.m4 (gl_FUNC_LOG2F): Likewise. * m4/log2l.m4 (gl_FUNC_LOG2L_WORKS): Likewise. * m4/logf.m4 (gl_FUNC_LOGF): Likewise. * m4/logl.m4 (gl_FUNC_LOGL_WORKS): Likewise. * m4/malloc.m4 (_AC_FUNC_MALLOC_IF): Likewise. * m4/mkstemp.m4 (gl_FUNC_MKSTEMP): Likewise. * m4/modf.m4 (gl_FUNC_MODF): Likewise. * m4/modff.m4 (gl_FUNC_MODFF): Likewise. * m4/modfl.m4 (gl_FUNC_MODFL): Likewise. * m4/musl.m4 (gl_MUSL_LIBC): Likewise. * m4/perror.m4 (gl_FUNC_PERROR): Likewise. * m4/posix_spawn.m4 (gl_POSIX_SPAWN_SECURE, gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE, gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2, gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN): Likewise. * m4/printf.m4 (gl_PRINTF_SIZES_C99, gl_PRINTF_INFINITE, gl_PRINTF_INFINITE_LONG_DOUBLE, gl_PRINTF_DIRECTIVE_A, gl_PRINTF_DIRECTIVE_F, gl_PRINTF_FLAG_ZERO, gl_SNPRINTF_TRUNCATION_C99, gl_SNPRINTF_RETVAL_C99, gl_SNPRINTF_DIRECTIVE_N, gl_VSNPRINTF_ZEROSIZE_C99): Likewise. * m4/pthread_rwlock_rdlock.m4 (gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER): Likewise. * m4/putenv.m4 (gl_FUNC_PUTENV): Likewise. * m4/realloc.m4 (_AC_FUNC_REALLOC_IF): Likewise. * m4/remainder.m4 (gl_FUNC_REMAINDER): Likewise. * m4/remainderf.m4 (gl_FUNC_REMAINDERF): Likewise. * m4/remainderl.m4 (gl_FUNC_REMAINDERL, gl_FUNC_REMAINDERL_WORKS): Likewise. * m4/rintl.m4 (gl_FUNC_RINTL): Likewise. * m4/round.m4 (gl_FUNC_ROUND): Likewise. * m4/roundf.m4 (gl_FUNC_ROUNDF): Likewise. * m4/roundl.m4 (gl_FUNC_ROUNDL): Likewise. * m4/setenv.m4 (gl_FUNC_SETENV): Likewise. * m4/setlocale_null.m4 (gl_FUNC_SETLOCALE_NULL): Likewise. * m4/signbit.m4 (gl_SIGNBIT): Likewise. * m4/stpncpy.m4 (gl_FUNC_STPNCPY): Likewise. * m4/strerror.m4 (gl_FUNC_STRERROR, gl_FUNC_STRERROR_0): Likewise. * m4/strtod.m4 (gl_FUNC_STRTOD): Likewise. * m4/strtold.m4 (gl_FUNC_STRTOLD): Likewise. * m4/trunc.m4 (gl_FUNC_TRUNC): Likewise. * m4/truncf.m4 (gl_FUNC_TRUNCF): Likewise. * m4/truncl.m4 (gl_FUNC_TRUNCL): Likewise. * m4/ungetc.m4 (gl_FUNC_UNGETC_WORKS): Likewise. * m4/wcwidth.m4 (gl_FUNC_WCWIDTH): Likewise.
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# modf.m4 serial 10
dnl Copyright (C) 2011-2023 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_MODF],
[
m4_divert_text([DEFAULTS], [gl_modf_required=plain])
AC_REQUIRE([gl_MATH_H_DEFAULTS])
dnl Determine MODF_LIBM.
gl_MATHFUNC([modf], [double], [(double, double *)])
m4_ifdef([gl_FUNC_MODF_IEEE], [
if test $gl_modf_required = ieee && test $REPLACE_MODF = 0; then
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether modf works according to ISO C 99 with IEC 60559],
[gl_cv_func_modf_ieee],
[
save_LIBS="$LIBS"
LIBS="$LIBS $MODF_LIBM"
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
]gl_DOUBLE_MINUS_ZERO_CODE[
]gl_DOUBLE_SIGNBIT_CODE[
/* Compare two numbers with ==.
This is a separate function because IRIX 6.5 "cc -O" miscompiles an
'x == x' test. */
static int
numeric_equal (double x, double y)
{
return x == y;
}
static double dummy (double x, double *iptr) { return 0; }
double zero;
double minus_one = - 1.0;
int main (int argc, char *argv[])
{
double (* volatile my_modf) (double, double *) = argc ? modf : dummy;
int result = 0;
double i;
double f;
/* Test modf(NaN,...).
This test fails on NetBSD 5.1, Cygwin. */
f = my_modf (zero / zero, &i);
if (numeric_equal (f, f))
result |= 1;
/* Test modf(-Inf,...).
This test fails on FreeBSD 6.4, OpenBSD 6.7, IRIX 6.5, OSF/1 5.1. */
f = my_modf (minus_one / zero, &i);
if (!(f == 0.0) || (signbitd (minus_zerod) && !signbitd (f)))
result |= 2;
return result;
}
]])],
[gl_cv_func_modf_ieee=yes],
[gl_cv_func_modf_ieee=no],
[case "$host_os" in
# Guess yes on glibc systems.
*-gnu* | gnu*) gl_cv_func_modf_ieee="guessing yes" ;;
# Guess yes on musl systems.
*-musl* | midipix*) gl_cv_func_modf_ieee="guessing yes" ;;
# Guess yes on MSVC, no on mingw.
mingw*) AC_EGREP_CPP([Known], [
#ifdef _MSC_VER
Known
#endif
],
[gl_cv_func_modf_ieee="guessing yes"],
[gl_cv_func_modf_ieee="guessing no"])
;;
# If we don't know, obey --enable-cross-guesses.
*) gl_cv_func_modf_ieee="$gl_cross_guess_normal" ;;
esac
])
LIBS="$save_LIBS"
])
case "$gl_cv_func_modf_ieee" in
*yes) ;;
*) REPLACE_MODF=1 ;;
esac
fi
])
if test $REPLACE_MODF = 1; then
dnl Find libraries needed to link lib/modf.c.
AC_REQUIRE([gl_FUNC_TRUNC])
MODF_LIBM="$TRUNC_LIBM"
fi
])