-# ceill.m4 serial 8
-dnl Copyright (C) 2007, 2009-2010 Free Software Foundation, Inc.
+# ceill.m4 serial 11
+dnl Copyright (C) 2007, 2009-2011 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 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>])
+ 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
#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. */
- if (signbitl (minus_zerol) && !signbitl (ceill (-0.3L)))
+ if (signbitl (minus_zerol) && !signbitl (my_ceill (-0.3L)))
return 1;
return 0;
}
HAVE_DECL_CEILL=0
fi
if test $HAVE_DECL_CEILL = 0 || test $REPLACE_CEILL = 1; then
- AC_LIBOBJ([ceill])
+ dnl No libraries are needed to link lib/ceill.c.
CEILL_LIBM=
fi
AC_SUBST([CEILL_LIBM])