-# remainder.m4 serial 2
-dnl Copyright (C) 2012 Free Software Foundation, Inc.
+# remainder.m4 serial 4
+dnl Copyright (C) 2012-2014 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.
:
m4_ifdef([gl_FUNC_REMAINDER_IEEE], [
if test $gl_remainder_required = ieee && test $REPLACE_REMAINDER = 0; then
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether remainder works according to ISO C 99 with IEC 60559],
[gl_cv_func_remainder_ieee],
[
int main (int argc, char *argv[])
{
double (*my_remainder) (double, double) = argc ? remainder : dummy;
- double i;
double f;
/* Test remainder(...,0.0).
This test fails on OSF/1 5.1. */
]])],
[gl_cv_func_remainder_ieee=yes],
[gl_cv_func_remainder_ieee=no],
- [gl_cv_func_remainder_ieee="guessing no"])
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_remainder_ieee="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_remainder_ieee="guessing no" ;;
+ esac
+ ])
LIBS="$save_LIBS"
])
case "$gl_cv_func_remainder_ieee" in
fi
if test $HAVE_REMAINDER = 0 || test $REPLACE_REMAINDER = 1; then
dnl Find libraries needed to link lib/remainder.c.
- AC_REQUIRE([gl_FUNC_ROUND])
- AC_REQUIRE([gl_FUNC_FMA])
+ AC_REQUIRE([gl_FUNC_FABS])
+ AC_REQUIRE([gl_FUNC_FMOD])
+ AC_REQUIRE([gl_FUNC_ISNAND])
REMAINDER_LIBM=
- dnl Append $ROUND_LIBM to REMAINDER_LIBM, avoiding gratuitous duplicates.
+ dnl Append $FABS_LIBM to REMAINDER_LIBM, avoiding gratuitous duplicates.
case " $REMAINDER_LIBM " in
- *" $ROUND_LIBM "*) ;;
- *) REMAINDER_LIBM="$REMAINDER_LIBM $ROUND_LIBM" ;;
+ *" $FABS_LIBM "*) ;;
+ *) REMAINDER_LIBM="$REMAINDER_LIBM $FABS_LIBM" ;;
esac
- dnl Append $FMA_LIBM to REMAINDER_LIBM, avoiding gratuitous duplicates.
+ dnl Append $FMOD_LIBM to REMAINDER_LIBM, avoiding gratuitous duplicates.
case " $REMAINDER_LIBM " in
- *" $FMA_LIBM "*) ;;
- *) REMAINDER_LIBM="$REMAINDER_LIBM $FMA_LIBM" ;;
+ *" $FMOD_LIBM "*) ;;
+ *) REMAINDER_LIBM="$REMAINDER_LIBM $FMOD_LIBM" ;;
+ esac
+ dnl Append $ISNAND_LIBM to REMAINDER_LIBM, avoiding gratuitous duplicates.
+ case " $REMAINDER_LIBM " in
+ *" $ISNAND_LIBM "*) ;;
+ *) REMAINDER_LIBM="$REMAINDER_LIBM $ISNAND_LIBM" ;;
esac
fi
AC_SUBST([REMAINDER_LIBM])