1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
# ceill.m4 serial 4
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_CEILL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
dnl Persuade glibc <math.h> to declare ceill().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
dnl Test whether ceill() is declared.
AC_CHECK_DECLS([ceill], , , [#include <math.h>])
if test "$ac_cv_have_decl_ceill" = yes; then
dnl Test whether ceill() can be used without libm.
gl_FUNC_CEILL_LIBS
if test "$CEILL_LIBM" = "?"; then
dnl Sun C 5.0 on Solaris declares ceill() and has it in the system-wide
dnl libm.so, but not in the libm.so that the compiler uses.
REPLACE_CEILL=1
fi
else
REPLACE_CEILL=1
fi
if test $REPLACE_CEILL = 1; then
AC_LIBOBJ([ceill])
CEILL_LIBM=
fi
AC_SUBST([REPLACE_CEILL])
AC_SUBST([CEILL_LIBM])
])
# Determines the libraries needed to get the ceill() function.
# Sets CEILL_LIBM.
AC_DEFUN([gl_FUNC_CEILL_LIBS],
[
gl_CACHE_VAL_SILENT([gl_cv_func_ceill_libm], [
gl_cv_func_ceill_libm=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
long double x;],
[x = ceill(x);],
[gl_cv_func_ceill_libm=])
if test "$gl_cv_func_ceill_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 = ceill(x);],
[gl_cv_func_ceill_libm="-lm"])
LIBS="$save_LIBS"
fi
])
CEILL_LIBM="$gl_cv_func_ceill_libm"
])
|
