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# ceilf.m4 serial 7
dnl Copyright (C) 2007, 2009-2010 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_CEILF],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
dnl Persuade glibc <math.h> to declare ceilf().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
dnl Test whether ceilf() is declared.
AC_CHECK_DECLS([ceilf], , , [#include <math.h>])
if test "$ac_cv_have_decl_ceilf" = yes; then
dnl Test whether ceilf() can be used without libm.
gl_FUNC_CEILF_LIBS
if test "$CEILF_LIBM" = "?"; then
dnl Sun C 5.0 on Solaris declares ceilf() and has it in the system-wide
dnl libm.so, but not in the libm.so that the compiler uses.
REPLACE_CEILF=1
fi
else
HAVE_DECL_CEILF=0
fi
if test $HAVE_DECL_CEILF = 0 || test $REPLACE_CEILF = 1; then
AC_LIBOBJ([ceilf])
CEILF_LIBM=
fi
AC_SUBST([CEILF_LIBM])
])
# Determines the libraries needed to get the ceilf() function.
# Sets CEILF_LIBM.
AC_DEFUN([gl_FUNC_CEILF_LIBS],
[
gl_CACHE_VAL_SILENT([gl_cv_func_ceilf_libm], [
gl_cv_func_ceilf_libm=?
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
float x;]],
[[x = ceilf(x);]])],
[gl_cv_func_ceilf_libm=])
if test "$gl_cv_func_ceilf_libm" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
float x;]],
[[x = ceilf(x);]])],
[gl_cv_func_ceilf_libm="-lm"])
LIBS="$save_LIBS"
fi
])
CEILF_LIBM="$gl_cv_func_ceilf_libm"
])
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