-# floorl.m4 serial 4
-dnl Copyright (C) 2007, 2009 Free Software Foundation, Inc.
+# floorl.m4 serial 11
+dnl Copyright (C) 2007, 2009-2013 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_FLOORL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
+
dnl Persuade glibc <math.h> to declare floorl().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
dnl Test whether floorl() is declared.
- AC_CHECK_DECLS([floorl], , , [#include <math.h>])
+ AC_CHECK_DECLS([floorl], , , [[#include <math.h>]])
if test "$ac_cv_have_decl_floorl" = yes; then
dnl Test whether floorl() can be used without libm.
gl_FUNC_FLOORL_LIBS
REPLACE_FLOORL=1
fi
else
- REPLACE_FLOORL=1
+ HAVE_DECL_FLOORL=0
fi
- if test $REPLACE_FLOORL = 1; then
- AC_LIBOBJ([floorl])
- FLOORL_LIBM=
+ if test $HAVE_DECL_FLOORL = 0 || test $REPLACE_FLOORL = 1; then
+ dnl Find libraries needed to link lib/floorl.c.
+ if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+ AC_REQUIRE([gl_FUNC_FLOOR])
+ FLOORL_LIBM="$FLOOR_LIBM"
+ else
+ FLOORL_LIBM=
+ fi
fi
- AC_SUBST([REPLACE_FLOORL])
AC_SUBST([FLOORL_LIBM])
])
[
gl_CACHE_VAL_SILENT([gl_cv_func_floorl_libm], [
gl_cv_func_floorl_libm=?
- AC_TRY_LINK([
- #ifndef __NO_MATH_INLINES
- # define __NO_MATH_INLINES 1 /* for glibc */
- #endif
- #include <math.h>
- long double x;],
- [x = floorl(x);],
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ long double (*funcptr) (long double) = floorl;
+ long double x;]],
+ [[x = funcptr (x) + floorl(x);]])],
[gl_cv_func_floorl_libm=])
if test "$gl_cv_func_floorl_libm" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
- AC_TRY_LINK([
- #ifndef __NO_MATH_INLINES
- # define __NO_MATH_INLINES 1 /* for glibc */
- #endif
- #include <math.h>
- long double x;],
- [x = floorl(x);],
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ long double (*funcptr) (long double) = floorl;
+ long double x;]],
+ [[x = funcptr (x) + floorl(x);]])],
[gl_cv_func_floorl_libm="-lm"])
LIBS="$save_LIBS"
fi