New module 'fabsf'.

* lib/math.in.h (fabsf): New declaration.
* lib/fabsf.c: New file.
* m4/fabsf.m4: New file.
* m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize GNULIB_FABSF,
HAVE_FABSF.
* modules/math (Makefile.am): Substitute GNULIB_FABSF, HAVE_FABSF.
* modules/fabsf: New file.
* tests/test-math-c++.cc: Check the declaration of fabsf.
* doc/posix-functions/fabsf.texi: Mention the new module.

diff --git a/ChangeLog b/ChangeLog
index cccd6f6..8c5b96e 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,16 @@
 2011-10-05  Bruno Haible  <bruno@clisp.org>
 
+       New module 'fabsf'.
+       * lib/math.in.h (fabsf): New declaration.
+       * lib/fabsf.c: New file.
+       * m4/fabsf.m4: New file.
+       * m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize GNULIB_FABSF,
+       HAVE_FABSF.
+       * modules/math (Makefile.am): Substitute GNULIB_FABSF, HAVE_FABSF.
+       * modules/fabsf: New file.
+       * tests/test-math-c++.cc: Check the declaration of fabsf.
+       * doc/posix-functions/fabsf.texi: Mention the new module.
+
        fabs: Use a .m4 file.
        * m4/fabs.m4: New file.
        * modules/fabs (Files): Add it.

diff --git a/doc/posix-functions/fabsf.texi b/doc/posix-functions/fabsf.texi
index 87d8538..4f63724 100644 (file)
--- a/doc/posix-functions/fabsf.texi
+++ b/doc/posix-functions/fabsf.texi
@@ -4,14 +4,10 @@
 
 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/fabsf.html}
 
-Gnulib module: ---
+Gnulib module: fabsf
 
 Portability problems fixed by Gnulib:
 @itemize
-@end itemize
-
-Portability problems not fixed by Gnulib:
-@itemize
 @item
 This function is missing on some platforms:
 AIX 5.1, Solaris 9.
@@ -19,3 +15,7 @@ AIX 5.1, Solaris 9.
 This function is only defined as a macro with arguments on some platforms:
 MSVC 9.
 @end itemize
+
+Portability problems not fixed by Gnulib:
+@itemize
+@end itemize

diff --git a/lib/fabsf.c b/lib/fabsf.c
new file mode 100644 (file)
index 0000000..4c0f970
--- /dev/null
+++ b/lib/fabsf.c
@@ -0,0 +1,26 @@
+/* Absolute value.
+   Copyright (C) 2011 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <math.h>
+
+float
+fabsf (float x)
+{
+  return (float) fabs ((double) x);
+}

diff --git a/lib/math.in.h b/lib/math.in.h
index f82d03c..73ad15d 100644 (file)
--- a/lib/math.in.h
+++ b/lib/math.in.h
@@ -282,6 +282,22 @@ _GL_WARN_ON_USE (expl, "expl is unportable - "
 #endif
 
 
+#if @GNULIB_FABSF@
+# if !@HAVE_FABSF@
+#  undef fabsf
+_GL_FUNCDECL_SYS (fabsf, float, (float x));
+# endif
+_GL_CXXALIAS_SYS (fabsf, float, (float x));
+_GL_CXXALIASWARN (fabsf);
+#elif defined GNULIB_POSIXCHECK
+# undef fabsf
+# if HAVE_RAW_DECL_FABSF
+_GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
+                 "use gnulib module fabsf for portability");
+# endif
+#endif
+
+
 #if @GNULIB_FLOORF@
 # if @REPLACE_FLOORF@
 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)

diff --git a/m4/fabsf.m4 b/m4/fabsf.m4
new file mode 100644 (file)
index 0000000..7924758
--- /dev/null
+++ b/m4/fabsf.m4
@@ -0,0 +1,25 @@
+# fabsf.m4 serial 1
+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,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_FABSF],
+[
+  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
+    HAVE_FABSF=0
+    FABSF_LIBM="$FABS_LIBM"
+  fi
+  AC_SUBST([FABSF_LIBM])
+])

diff --git a/m4/math_h.m4 b/m4/math_h.m4
index 7b46aee..50f2a8f 100644 (file)
--- a/m4/math_h.m4
+++ b/m4/math_h.m4
@@ -1,4 +1,4 @@
-# math_h.m4 serial 25
+# math_h.m4 serial 26
 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -62,6 +62,7 @@ AC_DEFUN([gl_MATH_H_DEFAULTS],
   GNULIB_CEILL=0;    AC_SUBST([GNULIB_CEILL])
   GNULIB_COSL=0;     AC_SUBST([GNULIB_COSL])
   GNULIB_EXPL=0;     AC_SUBST([GNULIB_EXPL])
+  GNULIB_FABSF=0;    AC_SUBST([GNULIB_FABSF])
   GNULIB_FLOOR=0;    AC_SUBST([GNULIB_FLOOR])
   GNULIB_FLOORF=0;   AC_SUBST([GNULIB_FLOORF])
   GNULIB_FLOORL=0;   AC_SUBST([GNULIB_FLOORL])
@@ -92,6 +93,7 @@ AC_DEFUN([gl_MATH_H_DEFAULTS],
   HAVE_ATANL=1;                AC_SUBST([HAVE_ATANL])
   HAVE_COSL=1;                 AC_SUBST([HAVE_COSL])
   HAVE_EXPL=1;                 AC_SUBST([HAVE_EXPL])
+  HAVE_FABSF=1;                AC_SUBST([HAVE_FABSF])
   HAVE_ISNANF=1;               AC_SUBST([HAVE_ISNANF])
   HAVE_ISNAND=1;               AC_SUBST([HAVE_ISNAND])
   HAVE_ISNANL=1;               AC_SUBST([HAVE_ISNANL])

diff --git a/modules/fabsf b/modules/fabsf
new file mode 100644 (file)
index 0000000..c3cafda
--- /dev/null
+++ b/modules/fabsf
@@ -0,0 +1,31 @@
+Description:
+fabsf() function: absolute value.
+
+Files:
+lib/fabsf.c
+m4/fabsf.m4
+
+Depends-on:
+math
+fabs            [test $HAVE_FABSF = 0]
+
+configure.ac:
+gl_FUNC_FABSF
+if test $HAVE_FABSF = 0; then
+  AC_LIBOBJ([fabsf])
+fi
+gl_MATH_MODULE_INDICATOR([fabsf])
+
+Makefile.am:
+
+Include:
+<math.h>
+
+Link:
+$(FABSF_LIBM)
+
+License:
+LGPL
+
+Maintainer:
+Bruno Haible

diff --git a/modules/math b/modules/math
index 8062d2d..73833ef 100644 (file)
--- a/modules/math
+++ b/modules/math
@@ -36,6 +36,7 @@ math.h: math.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(
              -e 's/@''GNULIB_CEILL''@/$(GNULIB_CEILL)/g' \
              -e 's/@''GNULIB_COSL''@/$(GNULIB_COSL)/g' \
              -e 's/@''GNULIB_EXPL''@/$(GNULIB_EXPL)/g' \
+             -e 's/@''GNULIB_FABSF''@/$(GNULIB_FABSF)/g' \
              -e 's/@''GNULIB_FLOOR''@/$(GNULIB_FLOOR)/g' \
              -e 's/@''GNULIB_FLOORF''@/$(GNULIB_FLOORF)/g' \
              -e 's/@''GNULIB_FLOORL''@/$(GNULIB_FLOORL)/g' \
@@ -66,6 +67,7 @@ math.h: math.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(
              -e 's|@''HAVE_ATANL''@|$(HAVE_ATANL)|g' \
              -e 's|@''HAVE_COSL''@|$(HAVE_COSL)|g' \
              -e 's|@''HAVE_EXPL''@|$(HAVE_EXPL)|g' \
+             -e 's|@''HAVE_FABSF''@|$(HAVE_FABSF)|g' \
              -e 's|@''HAVE_ISNANF''@|$(HAVE_ISNANF)|g' \
              -e 's|@''HAVE_ISNAND''@|$(HAVE_ISNAND)|g' \
              -e 's|@''HAVE_ISNANL''@|$(HAVE_ISNANL)|g' \

diff --git a/tests/test-math-c++.cc b/tests/test-math-c++.cc
index 2a3acff..183b37c 100644 (file)
--- a/tests/test-math-c++.cc
+++ b/tests/test-math-c++.cc
@@ -35,6 +35,9 @@
 //SIGNATURE_CHECK (GNULIB_NAMESPACE::erf, double, (double));
 //SIGNATURE_CHECK (GNULIB_NAMESPACE::erfc, double, (double));
 //SIGNATURE_CHECK (GNULIB_NAMESPACE::exp, double, (double));
+#if GNULIB_TEST_FABSF
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fabsf, float, (float));
+#endif
 //SIGNATURE_CHECK (GNULIB_NAMESPACE::fabs, double, (double));
 //SIGNATURE_CHECK (GNULIB_NAMESPACE::fmod, double, (double, double));
 #if GNULIB_TEST_FREXP