The remainderl() function is also missing on a number of platforms. Here's
the workaround module.
2012-02-25 Bruno Haible <br...@clisp.org>
New module 'remainderl'.
* lib/math.in.h (remainderh): New declaration.
* lib/remainderl.c: New file.
* m4/remainderl.m4: New file.
* modules/remainderl: New file.
* m4/math_h.m4 (gl_MATH_H): Test whether remainderl is declared.
(gl_MATH_H_DEFAULTS): Initialize GNULIB_REMAINDERL, HAVE_REMAINDERL.
* modules/math (Makefile.am): Substitute GNULIB_REMAINDERL,
HAVE_REMAINDERL.
* doc/posix-functions/remainderl.texi: Mention the new module.
============================== lib/remainderl.c ==============================
/* Remainder.
Copyright (C) 2012 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>
#if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
long double
remainderl (long double x, long double y)
{
return remainder (x, y);
}
#else
long double
remainderl (long double x, long double y)
{
long double i = roundl (x / y);
return fmal (- i, y, x);
}
#endif
============================== m4/remainderl.m4 ==============================
# remainderl.m4 serial 1
dnl Copyright (C) 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.
AC_DEFUN([gl_FUNC_REMAINDERL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
AC_REQUIRE([gl_FUNC_REMAINDER])
dnl Test whether remainderl() exists. Assume that remainderl(), if it exists,
is
dnl defined in the same library as remainder().
save_LIBS="$LIBS"
LIBS="$LIBS $REMAINDER_LIBM"
AC_CACHE_CHECK([for remainderl],
[gl_cv_func_remainderl],
[
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
long double (*funcptr) (long double, long double) = remainderl;
long double x;
long double y;]],
[[return funcptr (x, y) > 1
|| remainderl (x, y) > 1;]])],
[gl_cv_func_remainderl=yes],
[gl_cv_func_remainderl=no])
])
LIBS="$save_LIBS"
if test $gl_cv_func_remainderl = yes; then
REMAINDERL_LIBM="$REMAINDER_LIBM"
else
HAVE_REMAINDERL=0
dnl Find libraries needed to link lib/remainderl.c.
if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
REMAINDERL_LIBM="$REMAINDER_LIBM"
else
AC_REQUIRE([gl_FUNC_ROUNDL])
AC_REQUIRE([gl_FUNC_FMAL])
REMAINDERL_LIBM=
dnl Append $ROUNDL_LIBM to REMAINDERL_LIBM, avoiding gratuitous
duplicates.
case " $REMAINDERL_LIBM " in
*" $ROUNDL_LIBM "*) ;;
*) REMAINDERL_LIBM="$REMAINDERL_LIBM $ROUNDL_LIBM" ;;
esac
dnl Append $FMAL_LIBM to REMAINDERL_LIBM, avoiding gratuitous duplicates.
case " $REMAINDERL_LIBM " in
*" $FMAL_LIBM "*) ;;
*) REMAINDERL_LIBM="$REMAINDERL_LIBM $FMAL_LIBM" ;;
esac
fi
fi
AC_SUBST([REMAINDERL_LIBM])
])
============================= modules/remainderl =============================
Description:
remainderl() function: floating-point remainder function.
Files:
lib/remainderl.c
m4/remainderl.m4
m4/mathfunc.m4
Depends-on:
math
remainder [test $HAVE_REMAINDERL = 0 && test
$HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1]
roundl [test $HAVE_REMAINDERL = 0 && test
$HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
fmal [test $HAVE_REMAINDERL = 0 && test
$HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 0]
configure.ac:
gl_FUNC_REMAINDERL
if test $HAVE_REMAINDERL = 0; then
AC_LIBOBJ([remainderl])
fi
gl_MATH_MODULE_INDICATOR([remainderl])
Makefile.am:
Include:
<math.h>
Link:
$(REMAINDERL_LIBM)
License:
LGPL
Maintainer:
Bruno Haible
==============================================================================
--- doc/posix-functions/remainderl.texi.orig Sat Feb 25 20:35:09 2012
+++ doc/posix-functions/remainderl.texi Sat Feb 25 19:43:32 2012
@@ -4,15 +4,15 @@
POSIX specification:@*
@url{http://www.opengroup.org/onlinepubs/9699919799/functions/remainderl.html}
-Gnulib module: ---
+Gnulib module: remainderl
Portability problems fixed by Gnulib:
@itemize
+@item
+This function is missing on some platforms:
+FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX
6.5, OSF/1 4.0, Solaris 9, Cygwin, MSVC 9, Interix 3.5, BeOS.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
-@item
-This function is missing on some platforms:
-FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX
6.5, OSF/1 4.0, Solaris 9, Cygwin, MSVC 9, Interix 3.5, BeOS.
@end itemize
--- lib/math.in.h.orig Sat Feb 25 20:35:09 2012
+++ lib/math.in.h Sat Feb 25 19:44:37 2012
@@ -926,6 +926,20 @@
# endif
#endif
+#if @GNULIB_REMAINDERL@
+# if !@HAVE_REMAINDERL@
+_GL_FUNCDECL_SYS (remainderl, long double, (long double x, long double y));
+# endif
+_GL_CXXALIAS_SYS (remainderl, long double, (long double x, long double y));
+_GL_CXXALIASWARN (remainderl);
+#elif defined GNULIB_POSIXCHECK
+# undef remainderl
+# if HAVE_RAW_DECL_REMAINDERL
+_GL_WARN_ON_USE (remainderl, "remainderl is unportable - "
+ "use gnulib module remainderl for portability");
+# endif
+#endif
+
#if @GNULIB_RINTF@
# if !@HAVE_RINTF@
--- m4/math_h.m4.orig Sat Feb 25 20:35:09 2012
+++ m4/math_h.m4 Sat Feb 25 19:47:05 2012
@@ -1,4 +1,4 @@
-# math_h.m4 serial 61
+# math_h.m4 serial 62
dnl Copyright (C) 2007-2012 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -43,7 +43,7 @@
ceilf ceill copysign copysignf copysignl cosf cosl coshf
expf expl fabsf fabsl floorf floorl fma fmaf fmal fmodf fmodl frexpf
frexpl
ldexpf ldexpl logb logf logl log10f modff modfl powf
- remainder remainderf
+ remainder remainderf remainderl
rint rintf rintl round roundf roundl sinf sinl sinhf sqrtf sqrtl
tanf tanl tanhf trunc truncf truncl])
])
@@ -107,6 +107,7 @@
GNULIB_POWF=0; AC_SUBST([GNULIB_POWF])
GNULIB_REMAINDER=0; AC_SUBST([GNULIB_REMAINDER])
GNULIB_REMAINDERF=0; AC_SUBST([GNULIB_REMAINDERF])
+ GNULIB_REMAINDERL=0; AC_SUBST([GNULIB_REMAINDERL])
GNULIB_RINT=0; AC_SUBST([GNULIB_RINT])
GNULIB_RINTF=0; AC_SUBST([GNULIB_RINTF])
GNULIB_RINTL=0; AC_SUBST([GNULIB_RINTL])
@@ -161,6 +162,7 @@
HAVE_POWF=1; AC_SUBST([HAVE_POWF])
HAVE_REMAINDER=1; AC_SUBST([HAVE_REMAINDER])
HAVE_REMAINDERF=1; AC_SUBST([HAVE_REMAINDERF])
+ HAVE_REMAINDERL=1; AC_SUBST([HAVE_REMAINDERL])
HAVE_RINT=1; AC_SUBST([HAVE_RINT])
HAVE_RINTF=1; AC_SUBST([HAVE_RINTF])
HAVE_RINTL=1; AC_SUBST([HAVE_RINTL])
--- modules/math.orig Sat Feb 25 20:35:09 2012
+++ modules/math Sat Feb 25 20:07:07 2012
@@ -76,6 +76,7 @@
-e 's/@''GNULIB_POWF''@/$(GNULIB_POWF)/g' \
-e 's/@''GNULIB_REMAINDER''@/$(GNULIB_REMAINDER)/g' \
-e 's/@''GNULIB_REMAINDERF''@/$(GNULIB_REMAINDERF)/g' \
+ -e 's/@''GNULIB_REMAINDERL''@/$(GNULIB_REMAINDERL)/g' \
-e 's/@''GNULIB_RINT''@/$(GNULIB_RINT)/g' \
-e 's/@''GNULIB_RINTF''@/$(GNULIB_RINTF)/g' \
-e 's/@''GNULIB_RINTL''@/$(GNULIB_RINTL)/g' \
@@ -130,6 +131,7 @@
-e 's|@''HAVE_POWF''@|$(HAVE_POWF)|g' \
-e 's|@''HAVE_REMAINDER''@|$(HAVE_REMAINDER)|g' \
-e 's|@''HAVE_REMAINDERF''@|$(HAVE_REMAINDERF)|g' \
+ -e 's|@''HAVE_REMAINDERL''@|$(HAVE_REMAINDERL)|g' \
-e 's|@''HAVE_RINT''@|$(HAVE_RINT)|g' \
-e 's|@''HAVE_RINTF''@|$(HAVE_RINTF)|g' \
-e 's|@''HAVE_RINTL''@|$(HAVE_RINTL)|g' \
