-# floorf.m4 serial 9
-dnl Copyright (C) 2007, 2009-2011 Free Software Foundation, Inc.
+# floorf.m4 serial 12
+dnl Copyright (C) 2007, 2009-2012 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 floorf().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
dnl Test whether floorf() is declared.
- AC_CHECK_DECLS([floorf], , , [#include <math.h>])
+ AC_CHECK_DECLS([floorf], , , [[#include <math.h>]])
if test "$ac_cv_have_decl_floorf" = yes; then
dnl Test whether floorf() can be used without libm.
gl_FUNC_FLOORF_LIBS
#include <math.h>
]gl_FLOAT_MINUS_ZERO_CODE[
]gl_FLOAT_SIGNBIT_CODE[
-int main()
+static float dummy (float f) { return 0; }
+int main (int argc, char *argv[])
{
+ float (*my_floorf) (float) = argc ? floorf : dummy;
/* Test whether floorf (-0.0f) is -0.0f. */
- if (signbitf (minus_zerof) && !signbitf (floorf (minus_zerof)))
+ if (signbitf (minus_zerof) && !signbitf (my_floorf (minus_zerof)))
return 1;
return 0;
}
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
+ float (*funcptr) (float) = floorf;
float x;]],
- [[x = floorf(x);]])],
+ [[x = funcptr(x) + floorf(x);]])],
[gl_cv_func_floorf_libm=])
if test "$gl_cv_func_floorf_libm" = "?"; then
save_LIBS="$LIBS"
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
+ float (*funcptr) (float) = floorf;
float x;]],
- [[x = floorf(x);]])],
+ [[x = funcptr(x) + floorf(x);]])],
[gl_cv_func_floorf_libm="-lm"])
LIBS="$save_LIBS"
fi