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Re: new module 'modff'


From: Bruno Haible
Subject: Re: new module 'modff'
Date: Fri, 7 Oct 2011 12:26:11 +0200
User-agent: KMail/1.13.6 (Linux/2.6.37.6-0.5-desktop; KDE/4.6.0; x86_64; ; )

The modff() function is also in a different library than the modf() function,
on BSD systems. No need to activate gnulib's replacement on these platforms.


2011-10-07  Bruno Haible  <address@hidden>

        modff: Drop assumption about library that defines modff.
        * m4/modff.m4 (gl_FUNC_MODFF): Use gl_MATHFUNC macro instead of
        AC_CHECK_FUNCS.
        * modules/modff (Files): Add m4/mathfunc.m4.

--- m4/modff.m4.orig    Fri Oct  7 12:25:20 2011
+++ m4/modff.m4 Fri Oct  7 12:20:34 2011
@@ -1,4 +1,4 @@
-# modff.m4 serial 1
+# modff.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_MODF])
 
-  dnl Test whether modff() exists. Assume that modff(), if it exists, is
-  dnl defined in the same library as modf().
-  save_LIBS="$LIBS"
-  LIBS="$LIBS $MODF_LIBM"
-  AC_CHECK_FUNCS([modff])
-  LIBS="$save_LIBS"
-  if test $ac_cv_func_modff = yes; then
-    MODFF_LIBM="$MODF_LIBM"
-  else
+  dnl Test whether modff() exists. We cannot assume that modff(), if it
+  dnl exists, is defined in the same library as modf(). This is not the case
+  dnl on FreeBSD, NetBSD, OpenBSD.
+  gl_MATHFUNC([modff], [float], [(float, float *)])
+  if test $gl_cv_func_modff_no_libm = no \
+     && test $gl_cv_func_modff_in_libm = no; then
     HAVE_MODFF=0
     MODFF_LIBM="$MODF_LIBM"
   fi
--- modules/modff.orig  Fri Oct  7 12:25:20 2011
+++ modules/modff       Fri Oct  7 12:10:16 2011
@@ -4,6 +4,7 @@
 Files:
 lib/modff.c
 m4/modff.m4
+m4/mathfunc.m4
 
 Depends-on:
 math

-- 
In memoriam Anna Politkovskaya <http://en.wikipedia.org/wiki/Anna_Politkovskaya>



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