Hi Ben,
A week ago I promised this:
> OK, I can provide a macro that just tests whether floorf() needs libm.
Here it is (committed):
2007-10-28 Bruno Haible <[EMAIL PROTECTED]>
* m4/floorl.m4 (gl_FUNC_FLOORL_LIBS): New macro, extracted from
gl_FUNC_FLOORL. Cache the result.
(gl_FUNC_FLOORL): Use it.
* m4/ceill.m4 (gl_FUNC_CEILL_LIBS): New macro, extracted from
gl_FUNC_CEILL. Cache the result.
(gl_FUNC_CEILL): Use it.
* m4/floor.m4 (gl_FUNC_FLOOR_LIBS): New macro, extracted from
gl_FUNC_FLOOR. Cache the result.
(gl_FUNC_FLOOR): Use it.
* m4/ceil.m4 (gl_FUNC_CEIL_LIBS): New macro, extracted from
gl_FUNC_CEIL. Cache the result.
(gl_FUNC_CEIL): Use it.
* m4/floorf.m4 (gl_FUNC_FLOORF_LIBS): New macro, extracted from
gl_FUNC_FLOORF. Cache the result.
(gl_FUNC_FLOORF): Use it.
* m4/ceilf.m4 (gl_FUNC_CEILF_LIBS): New macro, extracted from
gl_FUNC_CEILF. Cache the result.
(gl_FUNC_CEILF): Use it.
*** m4/ceil.m4.orig 2007-10-29 01:56:35.000000000 +0100
--- m4/ceil.m4 2007-10-29 01:41:05.000000000 +0100
***************
*** 1,4 ****
! # ceil.m4 serial 1
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
--- 1,4 ----
! # ceil.m4 serial 2
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
***************
*** 7,24 ****
AC_DEFUN([gl_FUNC_CEIL],
[
dnl Test whether ceil() can be used without libm.
! CEIL_LIBM=?
! AC_TRY_LINK([
! #ifndef __NO_MATH_INLINES
! # define __NO_MATH_INLINES 1 /* for glibc */
! #endif
! #include <math.h>
! double x;],
! [x = ceil(x);],
! [CEIL_LIBM=])
if test "$CEIL_LIBM" = "?"; then
! save_LIBS="$LIBS"
! LIBS="$LIBS -lm"
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
--- 7,25 ----
AC_DEFUN([gl_FUNC_CEIL],
[
dnl Test whether ceil() can be used without libm.
! gl_FUNC_CEIL_LIBS
if test "$CEIL_LIBM" = "?"; then
! CEIL_LIBM=
! fi
! AC_SUBST([CEIL_LIBM])
! ])
!
! # Determines the libraries needed to get the ceil() function.
! # Sets CEIL_LIBM.
! AC_DEFUN([gl_FUNC_CEIL_LIBS],
! [
! AC_CACHE_VAL([gl_func_ceil_libm], [
! gl_func_ceil_libm=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
***************
*** 26,36 ****
#include <math.h>
double x;],
[x = ceil(x);],
! [CEIL_LIBM="-lm"])
! LIBS="$save_LIBS"
! fi
! if test "$CEIL_LIBM" = "?"; then
! CEIL_LIBM=
! fi
! AC_SUBST([CEIL_LIBM])
])
--- 27,46 ----
#include <math.h>
double x;],
[x = ceil(x);],
! [gl_func_ceil_libm=])
! if test "$gl_func_ceil_libm" = "?"; then
! save_LIBS="$LIBS"
! LIBS="$LIBS -lm"
! AC_TRY_LINK([
! #ifndef __NO_MATH_INLINES
! # define __NO_MATH_INLINES 1 /* for glibc */
! #endif
! #include <math.h>
! double x;],
! [x = ceil(x);],
! [gl_func_ceil_libm="-lm"])
! LIBS="$save_LIBS"
! fi
! ])
! CEIL_LIBM="$gl_func_ceil_libm"
])
*** m4/ceilf.m4.orig 2007-10-29 01:56:35.000000000 +0100
--- m4/ceilf.m4 2007-10-29 01:45:44.000000000 +0100
***************
*** 1,4 ****
! # ceilf.m4 serial 1
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
--- 1,4 ----
! # ceilf.m4 serial 2
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
***************
*** 13,19 ****
AC_CHECK_DECLS([ceilf], , , [#include <math.h>])
if test "$ac_cv_have_decl_ceilf" = yes; then
dnl Test whether ceilf() can be used without libm.
! CEILF_LIBM=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
--- 13,37 ----
AC_CHECK_DECLS([ceilf], , , [#include <math.h>])
if test "$ac_cv_have_decl_ceilf" = yes; then
dnl Test whether ceilf() can be used without libm.
! gl_FUNC_CEILF_LIBS
! if test "$CEILF_LIBM" = "?"; then
! CEILF_LIBM=
! fi
! else
! HAVE_DECL_CEILF=0
! AC_LIBOBJ([ceilf])
! CEILF_LIBM=
! fi
! AC_SUBST([HAVE_DECL_CEILF])
! AC_SUBST([CEILF_LIBM])
! ])
!
! # Determines the libraries needed to get the ceilf() function.
! # Sets CEILF_LIBM.
! AC_DEFUN([gl_FUNC_CEILF_LIBS],
! [
! AC_CACHE_VAL([gl_func_ceilf_libm], [
! gl_func_ceilf_libm=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
***************
*** 21,28 ****
#include <math.h>
float x;],
[x = ceilf(x);],
! [CEILF_LIBM=])
! if test "$CEILF_LIBM" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([
--- 39,46 ----
#include <math.h>
float x;],
[x = ceilf(x);],
! [gl_func_ceilf_libm=])
! if test "$gl_func_ceilf_libm" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([
***************
*** 32,48 ****
#include <math.h>
float x;],
[x = ceilf(x);],
! [CEILF_LIBM="-lm"])
LIBS="$save_LIBS"
fi
! if test "$CEILF_LIBM" = "?"; then
! CEILF_LIBM=
! fi
! else
! HAVE_DECL_CEILF=0
! AC_LIBOBJ([ceilf])
! CEILF_LIBM=
! fi
! AC_SUBST([HAVE_DECL_CEILF])
! AC_SUBST([CEILF_LIBM])
])
--- 50,58 ----
#include <math.h>
float x;],
[x = ceilf(x);],
! [gl_func_ceilf_libm="-lm"])
LIBS="$save_LIBS"
fi
! ])
! CEILF_LIBM="$gl_func_ceilf_libm"
])
*** m4/ceill.m4.orig 2007-10-29 01:56:35.000000000 +0100
--- m4/ceill.m4 2007-10-29 01:53:36.000000000 +0100
***************
*** 1,4 ****
! # ceill.m4 serial 1
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
--- 1,4 ----
! # ceill.m4 serial 2
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
***************
*** 13,19 ****
AC_CHECK_DECLS([ceill], , , [#include <math.h>])
if test "$ac_cv_have_decl_ceill" = yes; then
dnl Test whether ceill() can be used without libm.
! CEILL_LIBM=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
--- 13,37 ----
AC_CHECK_DECLS([ceill], , , [#include <math.h>])
if test "$ac_cv_have_decl_ceill" = yes; then
dnl Test whether ceill() can be used without libm.
! gl_FUNC_CEILL_LIBS
! if test "$CEILL_LIBM" = "?"; then
! CEILL_LIBM=
! fi
! else
! HAVE_DECL_CEILL=0
! AC_LIBOBJ([ceill])
! CEILL_LIBM=
! fi
! AC_SUBST([HAVE_DECL_CEILL])
! AC_SUBST([CEILL_LIBM])
! ])
!
! # Determines the libraries needed to get the ceill() function.
! # Sets CEILL_LIBM.
! AC_DEFUN([gl_FUNC_CEILL_LIBS],
! [
! AC_CACHE_VAL([gl_func_ceill_libm], [
! gl_func_ceill_libm=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
***************
*** 21,28 ****
#include <math.h>
long double x;],
[x = ceill(x);],
! [CEILL_LIBM=])
! if test "$CEILL_LIBM" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([
--- 39,46 ----
#include <math.h>
long double x;],
[x = ceill(x);],
! [gl_func_ceill_libm=])
! if test "$gl_func_ceill_libm" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([
***************
*** 32,48 ****
#include <math.h>
long double x;],
[x = ceill(x);],
! [CEILL_LIBM="-lm"])
LIBS="$save_LIBS"
fi
! if test "$CEILL_LIBM" = "?"; then
! CEILL_LIBM=
! fi
! else
! HAVE_DECL_CEILL=0
! AC_LIBOBJ([ceill])
! CEILL_LIBM=
! fi
! AC_SUBST([HAVE_DECL_CEILL])
! AC_SUBST([CEILL_LIBM])
])
--- 50,58 ----
#include <math.h>
long double x;],
[x = ceill(x);],
! [gl_func_ceill_libm="-lm"])
LIBS="$save_LIBS"
fi
! ])
! CEILL_LIBM="$gl_func_ceill_libm"
])
*** m4/floor.m4.orig 2007-10-29 01:56:35.000000000 +0100
--- m4/floor.m4 2007-10-29 01:36:54.000000000 +0100
***************
*** 1,4 ****
! # floor.m4 serial 1
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
--- 1,4 ----
! # floor.m4 serial 2
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
***************
*** 7,24 ****
AC_DEFUN([gl_FUNC_FLOOR],
[
dnl Test whether floor() can be used without libm.
! FLOOR_LIBM=?
! AC_TRY_LINK([
! #ifndef __NO_MATH_INLINES
! # define __NO_MATH_INLINES 1 /* for glibc */
! #endif
! #include <math.h>
! double x;],
! [x = floor(x);],
! [FLOOR_LIBM=])
if test "$FLOOR_LIBM" = "?"; then
! save_LIBS="$LIBS"
! LIBS="$LIBS -lm"
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
--- 7,25 ----
AC_DEFUN([gl_FUNC_FLOOR],
[
dnl Test whether floor() can be used without libm.
! gl_FUNC_FLOOR_LIBS
if test "$FLOOR_LIBM" = "?"; then
! FLOOR_LIBM=
! fi
! AC_SUBST([FLOOR_LIBM])
! ])
!
! # Determines the libraries needed to get the floor() function.
! # Sets FLOOR_LIBM.
! AC_DEFUN([gl_FUNC_FLOOR_LIBS],
! [
! AC_CACHE_VAL([gl_func_floor_libm], [
! gl_func_floor_libm=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
***************
*** 26,36 ****
#include <math.h>
double x;],
[x = floor(x);],
! [FLOOR_LIBM="-lm"])
! LIBS="$save_LIBS"
! fi
! if test "$FLOOR_LIBM" = "?"; then
! FLOOR_LIBM=
! fi
! AC_SUBST([FLOOR_LIBM])
])
--- 27,46 ----
#include <math.h>
double x;],
[x = floor(x);],
! [gl_func_floor_libm=])
! if test "$gl_func_floor_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>
! double x;],
! [x = floor(x);],
! [gl_func_floor_libm="-lm"])
! LIBS="$save_LIBS"
! fi
! ])
! FLOOR_LIBM="$gl_func_floor_libm"
])
*** m4/floorf.m4.orig 2007-10-29 01:56:35.000000000 +0100
--- m4/floorf.m4 2007-10-29 01:44:35.000000000 +0100
***************
*** 1,4 ****
! # floorf.m4 serial 1
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
--- 1,4 ----
! # floorf.m4 serial 2
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
***************
*** 13,19 ****
AC_CHECK_DECLS([floorf], , , [#include <math.h>])
if test "$ac_cv_have_decl_floorf" = yes; then
dnl Test whether floorf() can be used without libm.
! FLOORF_LIBM=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
--- 13,37 ----
AC_CHECK_DECLS([floorf], , , [#include <math.h>])
if test "$ac_cv_have_decl_floorf" = yes; then
dnl Test whether floorf() can be used without libm.
! gl_FUNC_FLOORF_LIBS
! if test "$FLOORF_LIBM" = "?"; then
! FLOORF_LIBM=
! fi
! else
! HAVE_DECL_FLOORF=0
! AC_LIBOBJ([floorf])
! FLOORF_LIBM=
! fi
! AC_SUBST([HAVE_DECL_FLOORF])
! AC_SUBST([FLOORF_LIBM])
! ])
!
! # Determines the libraries needed to get the floorf() function.
! # Sets FLOORF_LIBM.
! AC_DEFUN([gl_FUNC_FLOORF_LIBS],
! [
! AC_CACHE_VAL([gl_func_floorf_libm], [
! gl_func_floorf_libm=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
***************
*** 21,28 ****
#include <math.h>
float x;],
[x = floorf(x);],
! [FLOORF_LIBM=])
! if test "$FLOORF_LIBM" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([
--- 39,46 ----
#include <math.h>
float x;],
[x = floorf(x);],
! [gl_func_floorf_libm=])
! if test "$gl_func_floorf_libm" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([
***************
*** 32,48 ****
#include <math.h>
float x;],
[x = floorf(x);],
! [FLOORF_LIBM="-lm"])
LIBS="$save_LIBS"
fi
! if test "$FLOORF_LIBM" = "?"; then
! FLOORF_LIBM=
! fi
! else
! HAVE_DECL_FLOORF=0
! AC_LIBOBJ([floorf])
! FLOORF_LIBM=
! fi
! AC_SUBST([HAVE_DECL_FLOORF])
! AC_SUBST([FLOORF_LIBM])
])
--- 50,58 ----
#include <math.h>
float x;],
[x = floorf(x);],
! [gl_func_floorf_libm="-lm"])
LIBS="$save_LIBS"
fi
! ])
! FLOORF_LIBM="$gl_func_floorf_libm"
])
*** m4/floorl.m4.orig 2007-10-29 01:56:35.000000000 +0100
--- m4/floorl.m4 2007-10-29 01:49:49.000000000 +0100
***************
*** 1,4 ****
! # floorl.m4 serial 1
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
--- 1,4 ----
! # floorl.m4 serial 2
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
***************
*** 13,19 ****
AC_CHECK_DECLS([floorl], , , [#include <math.h>])
if test "$ac_cv_have_decl_floorl" = yes; then
dnl Test whether floorl() can be used without libm.
! FLOORL_LIBM=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
--- 13,37 ----
AC_CHECK_DECLS([floorl], , , [#include <math.h>])
if test "$ac_cv_have_decl_floorl" = yes; then
dnl Test whether floorl() can be used without libm.
! gl_FUNC_FLOORL_LIBS
! if test "$FLOORL_LIBM" = "?"; then
! FLOORL_LIBM=
! fi
! else
! HAVE_DECL_FLOORL=0
! AC_LIBOBJ([floorl])
! FLOORL_LIBM=
! fi
! AC_SUBST([HAVE_DECL_FLOORL])
! AC_SUBST([FLOORL_LIBM])
! ])
!
! # Determines the libraries needed to get the floorl() function.
! # Sets FLOORL_LIBM.
! AC_DEFUN([gl_FUNC_FLOORL_LIBS],
! [
! AC_CACHE_VAL([gl_func_floorl_libm], [
! gl_func_floorl_libm=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
***************
*** 21,28 ****
#include <math.h>
long double x;],
[x = floorl(x);],
! [FLOORL_LIBM=])
! if test "$FLOORL_LIBM" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([
--- 39,46 ----
#include <math.h>
long double x;],
[x = floorl(x);],
! [gl_func_floorl_libm=])
! if test "$gl_func_floorl_libm" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([
***************
*** 32,48 ****
#include <math.h>
long double x;],
[x = floorl(x);],
! [FLOORL_LIBM="-lm"])
LIBS="$save_LIBS"
fi
! if test "$FLOORL_LIBM" = "?"; then
! FLOORL_LIBM=
! fi
! else
! HAVE_DECL_FLOORL=0
! AC_LIBOBJ([floorl])
! FLOORL_LIBM=
! fi
! AC_SUBST([HAVE_DECL_FLOORL])
! AC_SUBST([FLOORL_LIBM])
])
--- 50,58 ----
#include <math.h>
long double x;],
[x = floorl(x);],
! [gl_func_floorl_libm="-lm"])
LIBS="$save_LIBS"
fi
! ])
! FLOORL_LIBM="$gl_func_floorl_libm"
])
