projects
/
gnulib.git
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
extensions: port better to MINUX 3, HP-UX, autoheader 2.62
[gnulib.git]
/
m4
/
ceill.m4
diff --git
a/m4/ceill.m4
b/m4/ceill.m4
index
8116de1
..
e26c1b0
100644
(file)
--- a/
m4/ceill.m4
+++ b/
m4/ceill.m4
@@
-1,5
+1,5
@@
-# ceill.m4 serial
9
-dnl Copyright (C) 2007, 2009-201
1
Free Software Foundation, Inc.
+# ceill.m4 serial
14
+dnl Copyright (C) 2007, 2009-201
3
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.
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.
@@
-8,10
+8,13
@@
AC_DEFUN([gl_FUNC_CEILL],
[
m4_divert_text([DEFAULTS], [gl_ceill_required=plain])
AC_REQUIRE([gl_MATH_H_DEFAULTS])
[
m4_divert_text([DEFAULTS], [gl_ceill_required=plain])
AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
+
dnl Persuade glibc <math.h> to declare ceill().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
dnl Persuade glibc <math.h> to declare ceill().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
dnl Test whether ceill() is declared.
dnl Test whether ceill() is declared.
- AC_CHECK_DECLS([ceill], , , [
#include <math.h>
])
+ AC_CHECK_DECLS([ceill], , , [
[#include <math.h>]
])
if test "$ac_cv_have_decl_ceill" = yes; then
dnl Test whether ceill() can be used without libm.
gl_FUNC_CEILL_LIBS
if test "$ac_cv_have_decl_ceill" = yes; then
dnl Test whether ceill() can be used without libm.
gl_FUNC_CEILL_LIBS
@@
-22,6
+25,7
@@
AC_DEFUN([gl_FUNC_CEILL],
fi
m4_ifdef([gl_FUNC_CEILL_IEEE], [
if test $gl_ceill_required = ieee && test $REPLACE_CEILL = 0; then
fi
m4_ifdef([gl_FUNC_CEILL_IEEE], [
if test $gl_ceill_required = ieee && test $REPLACE_CEILL = 0; then
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether ceill works according to ISO C 99 with IEC 60559],
[gl_cv_func_ceill_ieee],
[
AC_CACHE_CHECK([whether ceill works according to ISO C 99 with IEC 60559],
[gl_cv_func_ceill_ieee],
[
@@
-35,17
+39,25
@@
AC_DEFUN([gl_FUNC_CEILL],
#include <math.h>
]gl_LONG_DOUBLE_MINUS_ZERO_CODE[
]gl_LONG_DOUBLE_SIGNBIT_CODE[
#include <math.h>
]gl_LONG_DOUBLE_MINUS_ZERO_CODE[
]gl_LONG_DOUBLE_SIGNBIT_CODE[
-int main()
+static long double dummy (long double f) { return 0; }
+int main (int argc, char *argv[])
{
{
+ long double (*my_ceill) (long double) = argc ? ceill : dummy;
/* Test whether ceill (-0.3L) is -0.0L. */
/* Test whether ceill (-0.3L) is -0.0L. */
- if (signbitl (minus_zerol) && !signbitl (ceill (-0.3L)))
+ if (signbitl (minus_zerol) && !signbitl (
my_
ceill (-0.3L)))
return 1;
return 0;
}
]])],
[gl_cv_func_ceill_ieee=yes],
[gl_cv_func_ceill_ieee=no],
return 1;
return 0;
}
]])],
[gl_cv_func_ceill_ieee=yes],
[gl_cv_func_ceill_ieee=no],
- [gl_cv_func_ceill_ieee="guessing no"])
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_ceill_ieee="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_ceill_ieee="guessing no" ;;
+ esac
+ ])
LIBS="$save_LIBS"
])
case "$gl_cv_func_ceill_ieee" in
LIBS="$save_LIBS"
])
case "$gl_cv_func_ceill_ieee" in
@@
-58,8
+70,13
@@
int main()
HAVE_DECL_CEILL=0
fi
if test $HAVE_DECL_CEILL = 0 || test $REPLACE_CEILL = 1; then
HAVE_DECL_CEILL=0
fi
if test $HAVE_DECL_CEILL = 0 || test $REPLACE_CEILL = 1; then
- dnl No libraries are needed to link lib/ceill.c.
- CEILL_LIBM=
+ dnl Find libraries needed to link lib/ceill.c.
+ if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+ AC_REQUIRE([gl_FUNC_CEIL])
+ CEILL_LIBM="$CEIL_LIBM"
+ else
+ CEILL_LIBM=
+ fi
fi
AC_SUBST([CEILL_LIBM])
])
fi
AC_SUBST([CEILL_LIBM])
])
@@
-76,8
+93,9
@@
AC_DEFUN([gl_FUNC_CEILL_LIBS],
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
+ long double (*funcptr) (long double) = ceill;
long double x;]],
long double x;]],
- [[x = ceill(x);]])],
+ [[x =
funcptr(x) +
ceill(x);]])],
[gl_cv_func_ceill_libm=])
if test "$gl_cv_func_ceill_libm" = "?"; then
save_LIBS="$LIBS"
[gl_cv_func_ceill_libm=])
if test "$gl_cv_func_ceill_libm" = "?"; then
save_LIBS="$LIBS"
@@
-88,8
+106,9
@@
AC_DEFUN([gl_FUNC_CEILL_LIBS],
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
+ long double (*funcptr) (long double) = ceill;
long double x;]],
long double x;]],
- [[x = ceill(x);]])],
+ [[x =
funcptr(x) +
ceill(x);]])],
[gl_cv_func_ceill_libm="-lm"])
LIBS="$save_LIBS"
fi
[gl_cv_func_ceill_libm="-lm"])
LIBS="$save_LIBS"
fi