projects
/
gnulib.git
/ blobdiff
commit
grep
author
committer
pickaxe
?
search:
re
summary
|
shortlog
|
log
|
commit
|
commitdiff
|
tree
raw
|
inline
| side by side
autoupdate
[gnulib.git]
/
m4
/
ceil.m4
diff --git
a/m4/ceil.m4
b/m4/ceil.m4
index
1574077
..
c617561
100644
(file)
--- a/
m4/ceil.m4
+++ b/
m4/ceil.m4
@@
-1,5
+1,5
@@
-# ceil.m4 serial
6
-dnl Copyright (C) 2007, 2009-201
1
Free Software Foundation, Inc.
+# ceil.m4 serial
9
+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.
@@
-15,6
+15,7
@@
AC_DEFUN([gl_FUNC_CEIL],
fi
m4_ifdef([gl_FUNC_CEIL_IEEE], [
if test $gl_ceil_required = ieee && test $REPLACE_CEIL = 0; then
fi
m4_ifdef([gl_FUNC_CEIL_IEEE], [
if test $gl_ceil_required = ieee && test $REPLACE_CEIL = 0; then
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether ceil works according to ISO C 99 with IEC 60559],
[gl_cv_func_ceil_ieee],
[
AC_CACHE_CHECK([whether ceil works according to ISO C 99 with IEC 60559],
[gl_cv_func_ceil_ieee],
[
@@
-28,17
+29,29
@@
AC_DEFUN([gl_FUNC_CEIL],
#include <math.h>
]gl_DOUBLE_MINUS_ZERO_CODE[
]gl_DOUBLE_SIGNBIT_CODE[
#include <math.h>
]gl_DOUBLE_MINUS_ZERO_CODE[
]gl_DOUBLE_SIGNBIT_CODE[
-int main()
+static double dummy (double f) { return 0; }
+int main (int argc, char *argv[])
{
{
+ double (*my_ceil) (double) = argc ? ceil : dummy;
+ int result = 0;
/* Test whether ceil (-0.0) is -0.0. */
/* Test whether ceil (-0.0) is -0.0. */
- if (signbitd (minus_zerod) && !signbitd (ceil (minus_zerod)))
- return 1;
- return 0;
+ if (signbitd (minus_zerod) && !signbitd (my_ceil (minus_zerod)))
+ result |= 1;
+ /* Test whether ceil (-0.3) is -0.0. */
+ if (signbitd (-0.3) && !signbitd (my_ceil (-0.3)))
+ result |= 2;
+ return result;
}
]])],
[gl_cv_func_ceil_ieee=yes],
[gl_cv_func_ceil_ieee=no],
}
]])],
[gl_cv_func_ceil_ieee=yes],
[gl_cv_func_ceil_ieee=no],
- [gl_cv_func_ceil_ieee="guessing no"])
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_ceil_ieee="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_ceil_ieee="guessing no" ;;
+ esac
+ ])
LIBS="$save_LIBS"
])
case "$gl_cv_func_ceil_ieee" in
LIBS="$save_LIBS"
])
case "$gl_cv_func_ceil_ieee" in