* m4/remainder-ieee.m4: New file.
* m4/remainder.m4 (gl_FUNC_REMAINDER): If gl_FUNC_REMAINDER_IEEE is
present, test whether remainder works with a zero second argument.
Replace it if not.
* lib/math.in.h (remainder): Override if REPLACE_REMAINDER is 1.
* m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize REPLACE_REMAINDER.
* modules/math (Makefile.am): Substitute REPLACE_REMAINDER.
* modules/remainder (configure.ac): Consider REPLACE_REMAINDER.
(Depends-on): Update dependencies.
* modules/remainder-ieee (Files): Add m4/remainder-ieee.m4.
(configure.ac): Invoke gl_FUNC_REMAINDER_IEEE.
* doc/posix-functions/remainder.texi: Mention the remainder-ieee module.
2012-02-27 Bruno Haible <bruno@clisp.org>
+ remainder-ieee: Work around test failure on OSF/1.
+ * m4/remainder-ieee.m4: New file.
+ * m4/remainder.m4 (gl_FUNC_REMAINDER): If gl_FUNC_REMAINDER_IEEE is
+ present, test whether remainder works with a zero second argument.
+ Replace it if not.
+ * lib/math.in.h (remainder): Override if REPLACE_REMAINDER is 1.
+ * m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize REPLACE_REMAINDER.
+ * modules/math (Makefile.am): Substitute REPLACE_REMAINDER.
+ * modules/remainder (configure.ac): Consider REPLACE_REMAINDER.
+ (Depends-on): Update dependencies.
+ * modules/remainder-ieee (Files): Add m4/remainder-ieee.m4.
+ (configure.ac): Invoke gl_FUNC_REMAINDER_IEEE.
+ * doc/posix-functions/remainder.texi: Mention the remainder-ieee module.
+
Tests for module 'remainderl-ieee'.
* modules/remainderl-ieee-tests: New file.
* tests/test-remainderl-ieee.c: New file.
POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/remainder.html}
-Gnulib module: remainder
+Gnulib module: remainder or remainder-ieee
-Portability problems fixed by Gnulib:
+Portability problems fixed by either Gnulib module @code{remainder} or @code{remainder-ieee}:
@itemize
@item
This function is missing on some platforms:
IRIX 5.3.
@end itemize
+Portability problems fixed by Gnulib module @code{remainder-ieee}:
+@itemize
+@item
+This function has problems when the second argument is zero on some platforms:
+OSF/1 5.1.
+@end itemize
+
Portability problems not fixed by Gnulib:
@itemize
@end itemize
#endif
#if @GNULIB_REMAINDER@
-# if !@HAVE_REMAINDER@ || !@HAVE_DECL_REMAINDER@
+# if @REPLACE_REMAINDER@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef remainder
+# define remainder rpl_remainder
+# endif
+_GL_FUNCDECL_RPL (remainder, double, (double x, double y));
+_GL_CXXALIAS_RPL (remainder, double, (double x, double y));
+# else
+# if !@HAVE_REMAINDER@ || !@HAVE_DECL_REMAINDER@
_GL_FUNCDECL_SYS (remainder, double, (double x, double y));
-# endif
+# endif
_GL_CXXALIAS_SYS (remainder, double, (double x, double y));
+# endif
_GL_CXXALIASWARN (remainder);
#elif defined GNULIB_POSIXCHECK
# undef remainder
-# math_h.m4 serial 68
+# math_h.m4 serial 69
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,
REPLACE_MODFF=0; AC_SUBST([REPLACE_MODFF])
REPLACE_MODFL=0; AC_SUBST([REPLACE_MODFL])
REPLACE_NAN=0; AC_SUBST([REPLACE_NAN])
+ REPLACE_REMAINDER=0; AC_SUBST([REPLACE_REMAINDER])
REPLACE_ROUND=0; AC_SUBST([REPLACE_ROUND])
REPLACE_ROUNDF=0; AC_SUBST([REPLACE_ROUNDF])
REPLACE_ROUNDL=0; AC_SUBST([REPLACE_ROUNDL])
--- /dev/null
+# remainder-ieee.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.
+
+dnl This macro is in a separate file (not in remainder.m4 and not inlined in the
+dnl module description), so that gl_FUNC_REMAINDER can test whether 'aclocal'
+dnl has found uses of this macro.
+
+AC_DEFUN([gl_FUNC_REMAINDER_IEEE],
+[
+ m4_divert_text([INIT_PREPARE], [gl_remainder_required=ieee])
+ AC_REQUIRE([gl_FUNC_REMAINDER])
+])
-# remainder.m4 serial 1
+# remainder.m4 serial 2
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,
AC_DEFUN([gl_FUNC_REMAINDER],
[
+ m4_divert_text([DEFAULTS], [gl_remainder_required=plain])
AC_REQUIRE([gl_MATH_H_DEFAULTS])
dnl Test whether remainder() is declared. On IRIX 5.3 it is not declared.
REMAINDER_LIBM=-lm
fi
fi
- if test $gl_cv_func_remainder_no_libm = no \
- && test $gl_cv_func_remainder_in_libm = no; then
+ if test $gl_cv_func_remainder_no_libm = yes \
+ || test $gl_cv_func_remainder_in_libm = yes; then
+ :
+ m4_ifdef([gl_FUNC_REMAINDER_IEEE], [
+ if test $gl_remainder_required = ieee && test $REPLACE_REMAINDER = 0; then
+ AC_CACHE_CHECK([whether remainder works according to ISO C 99 with IEC 60559],
+ [gl_cv_func_remainder_ieee],
+ [
+ save_LIBS="$LIBS"
+ LIBS="$LIBS $REMAINDER_LIBM"
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+#ifndef __NO_MATH_INLINES
+# define __NO_MATH_INLINES 1 /* for glibc */
+#endif
+#include <math.h>
+/* Compare two numbers with ==.
+ This is a separate function because IRIX 6.5 "cc -O" miscompiles an
+ 'x == x' test. */
+static int
+numeric_equal (double x, double y)
+{
+ return x == y;
+}
+static double dummy (double x, double y) { return 0; }
+int main (int argc, char *argv[])
+{
+ double (*my_remainder) (double, double) = argc ? remainder : dummy;
+ double i;
+ double f;
+ /* Test remainder(...,0.0).
+ This test fails on OSF/1 5.1. */
+ f = my_remainder (2.0, 0.0);
+ if (numeric_equal (f, f))
+ return 1;
+ return 0;
+}
+ ]])],
+ [gl_cv_func_remainder_ieee=yes],
+ [gl_cv_func_remainder_ieee=no],
+ [gl_cv_func_remainder_ieee="guessing no"])
+ LIBS="$save_LIBS"
+ ])
+ case "$gl_cv_func_remainder_ieee" in
+ *yes) ;;
+ *) REPLACE_REMAINDER=1 ;;
+ esac
+ fi
+ ])
+ else
HAVE_REMAINDER=0
+ fi
+ if test $HAVE_REMAINDER = 0 || test $REPLACE_REMAINDER = 1; then
dnl Find libraries needed to link lib/remainder.c.
AC_REQUIRE([gl_FUNC_ROUND])
AC_REQUIRE([gl_FUNC_FMA])
-e 's|@''REPLACE_MODFF''@|$(REPLACE_MODFF)|g' \
-e 's|@''REPLACE_MODFL''@|$(REPLACE_MODFL)|g' \
-e 's|@''REPLACE_NAN''@|$(REPLACE_NAN)|g' \
+ -e 's|@''REPLACE_REMAINDER''@|$(REPLACE_REMAINDER)|g' \
-e 's|@''REPLACE_ROUND''@|$(REPLACE_ROUND)|g' \
-e 's|@''REPLACE_ROUNDF''@|$(REPLACE_ROUNDF)|g' \
-e 's|@''REPLACE_ROUNDL''@|$(REPLACE_ROUNDL)|g' \
Depends-on:
math
-round [test $HAVE_REMAINDER = 0]
-fma [test $HAVE_REMAINDER = 0]
+round [test $HAVE_REMAINDER = 0 || test $REPLACE_REMAINDER = 1]
+fma [test $HAVE_REMAINDER = 0 || test $REPLACE_REMAINDER = 1]
configure.ac:
gl_FUNC_REMAINDER
-if test $HAVE_REMAINDER = 0; then
+if test $HAVE_REMAINDER = 0 || test $REPLACE_REMAINDER = 1; then
AC_LIBOBJ([remainder])
fi
gl_MATH_MODULE_INDICATOR([remainder])
remainder() function according to ISO C 99 with IEC 60559.
Files:
+m4/remainder-ieee.m4
Depends-on:
remainder
fpieee
configure.ac:
+gl_FUNC_REMAINDER_IEEE
Makefile.am: