+2012-03-13 Bruno Haible <bruno@clisp.org>
+
+ remainderl: Bypass broken implementation in OpenBSD 5.1/SPARC.
+ * m4/remainderl.m4 (gl_FUNC_REMAINDERL_WORKS): New macro.
+ (gl_FUNC_REMAINDERL): Invoke it. If the function does not work, set
+ REPLACE_REMAINDERL to 1.
+ * doc/posix-functions/remainderl.texi: Mention the OpenBSD 5.1/SPARC
+ bug.
+
2012-03-13 Bruno Haible <bruno@clisp.org>
sqrtl: Bypass broken implementation in OpenBSD 5.1/SPARC.
-# remainderl.m4 serial 5
+# remainderl.m4 serial 6
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 Also check whether it's declared.
dnl IRIX 6.5 has remainderl() in libm but doesn't declare it in <math.h>.
AC_CHECK_DECLS([remainderl], , [HAVE_DECL_REMAINDERL=0], [[#include <math.h>]])
+
+ save_LIBS="$LIBS"
+ LIBS="$LIBS $REMAINDERL_LIBM"
+ gl_FUNC_REMAINDERL_WORKS
+ LIBS="$save_LIBS"
+ case "$gl_cv_func_remainderl_works" in
+ *yes) ;;
+ *) REPLACE_REMAINDERL=1 ;;
+ esac
+
m4_ifdef([gl_FUNC_REMAINDERL_IEEE], [
if test $gl_remainderl_required = ieee && test $REPLACE_REMAINDERL = 0; then
AC_CACHE_CHECK([whether remainderl works according to ISO C 99 with IEC 60559],
fi
AC_SUBST([REMAINDERL_LIBM])
])
+
+dnl Test whether remainderl() works.
+dnl It produces completely wrong values on OpenBSD 5.1/SPARC.
+AC_DEFUN([gl_FUNC_REMAINDERL_WORKS],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether remainderl works], [gl_cv_func_remainderl_works],
+ [
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+#ifndef __NO_MATH_INLINES
+# define __NO_MATH_INLINES 1 /* for glibc */
+#endif
+#include <math.h>
+extern
+#ifdef __cplusplus
+"C"
+#endif
+long double remainderl (long double, long double);
+volatile long double x;
+volatile long double y;
+long double z;
+int main ()
+{
+ /* This test fails on OpenBSD 5.1/SPARC. */
+ x = 9.245907126L;
+ y = 3.141592654L;
+ z = remainderl (x, y);
+ if (z >= 0.0L)
+ return 1;
+ return 0;
+}
+]])],
+ [gl_cv_func_remainderl_works=yes],
+ [gl_cv_func_remainderl_works=no],
+ [case "$host_os" in
+ openbsd*) gl_cv_func_remainderl_works="guessing no";;
+ *) gl_cv_func_remainderl_works="guessing yes";;
+ esac
+ ])
+ ])
+])