> dnl Test whether fabsf() exists. Assume that fabsf(), if it exists, is
> dnl defined in the same library as fabs().
This was a wrong assumption. On FreeBSD, NetBSD, OpenBSD, fabs() is in libc,
whereas fabsf() is in libm. Fixed as follows:
2011-10-06 Bruno Haible <br...@clisp.org>
fabsf: Drop assumption about library that defines fabsf.
* m4/fabsf.m4 (gl_FUNC_FABSF): Use gl_MATHFUNC macro instead of
AC_CHECK_FUNCS.
* modules/fabsf (Files): Add m4/mathfunc.m4.
--- m4/fabsf.m4.orig Fri Oct 7 00:21:36 2011
+++ m4/fabsf.m4 Fri Oct 7 00:21:34 2011
@@ -1,4 +1,4 @@
-# fabsf.m4 serial 1
+# fabsf.m4 serial 2
dnl Copyright (C) 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,
@@ -9,15 +9,12 @@
AC_REQUIRE([gl_MATH_H_DEFAULTS])
AC_REQUIRE([gl_FUNC_FABS])
- dnl Test whether fabsf() exists. Assume that fabsf(), if it exists, is
- dnl defined in the same library as fabs().
- save_LIBS="$LIBS"
- LIBS="$LIBS $FABS_LIBM"
- AC_CHECK_FUNCS([fabsf])
- LIBS="$save_LIBS"
- if test $ac_cv_func_fabsf = yes; then
- FABSF_LIBM="$FABS_LIBM"
- else
+ dnl Test whether fabsf() exists. We cannot assume that fabsf(), if it
+ dnl exists, is defined in the same library as fabs(). This is not the case
+ dnl on FreeBSD, NetBSD, OpenBSD.
+ gl_MATHFUNC([fabsf], [float], [(float)])
+ if test $gl_cv_func_fabsf_no_libm = no \
+ && test $gl_cv_func_fabsf_in_libm = no; then
HAVE_FABSF=0
FABSF_LIBM="$FABS_LIBM"
fi
--- modules/fabsf.orig Fri Oct 7 00:21:36 2011
+++ modules/fabsf Fri Oct 7 00:15:11 2011
@@ -4,6 +4,7 @@
Files:
lib/fabsf.c
m4/fabsf.m4
+m4/mathfunc.m4
Depends-on:
math
--
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