* lib/math.in.h (cbrtf): Override if REPLACE_CBRTF is 1.
* m4/cbrtf.m4 (gl_FUNC_CBRTF_WORKS): New macro.
(gl_FUNC_CBRTF): Invoke it. Set REPLACE_CBRTF to 1 if cbrtf() does not
work.
* m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize REPLACE_CBRTF.
* modules/math (Makefile.am): Substitute REPLACE_CBRTF.
* modules/cbrtf (configure.ac): Consider REPLACE_CBRTF.
(Depends-on): Update conditions.
* doc/posix-functions/cbrtf.texi: Mention the IRIX 6.5 problem.
+2012-02-29 Bruno Haible <bruno@clisp.org>
+
+ cbrtf: Work around bug in IRIX 6.5 system function.
+ * lib/math.in.h (cbrtf): Override if REPLACE_CBRTF is 1.
+ * m4/cbrtf.m4 (gl_FUNC_CBRTF_WORKS): New macro.
+ (gl_FUNC_CBRTF): Invoke it. Set REPLACE_CBRTF to 1 if cbrtf() does not
+ work.
+ * m4/math_h.m4 (gl_MATH_H_DEFAULTS): Initialize REPLACE_CBRTF.
+ * modules/math (Makefile.am): Substitute REPLACE_CBRTF.
+ * modules/cbrtf (configure.ac): Consider REPLACE_CBRTF.
+ (Depends-on): Update conditions.
+ * doc/posix-functions/cbrtf.texi: Mention the IRIX 6.5 problem.
+
2012-02-29 Bruno Haible <bruno@clisp.org>
Tests for module 'cbrtl'.
@item
This function is not declared on some platforms:
IRIX 6.5.
+@item
+This function returns a wrong value for a minus zero on some platforms:
+IRIX 6.5.
@end itemize
Portability problems not fixed by Gnulib:
#if @GNULIB_CBRTF@
-# if !@HAVE_DECL_CBRTF@
+# if @REPLACE_CBRTF@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef cbrtf
+# define cbrtf rpl_cbrtf
+# endif
+_GL_FUNCDECL_RPL (cbrtf, float, (float x));
+_GL_CXXALIAS_RPL (cbrtf, float, (float x));
+# else
+# if !@HAVE_DECL_CBRTF@
_GL_FUNCDECL_SYS (cbrtf, float, (float x));
-# endif
+# endif
_GL_CXXALIAS_SYS (cbrtf, float, (float x));
+# endif
_GL_CXXALIASWARN (cbrtf);
#elif defined GNULIB_POSIXCHECK
# undef cbrtf
-# cbrtf.m4 serial 1
+# cbrtf.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,
dnl Also check whether it's declared.
dnl IRIX 6.5 has cbrtf() in libm but doesn't declare it in <math.h>.
AC_CHECK_DECL([cbrtf], , [HAVE_DECL_CBRTF=0], [[#include <math.h>]])
+ save_LIBS="$LIBS"
+ LIBS="$LIBS $CBRTF_LIBM"
+ gl_FUNC_CBRTF_WORKS
+ LIBS="$save_LIBS"
+ case "$gl_cv_func_cbrtf_works" in
+ *yes) ;;
+ *) REPLACE_CBRTF=1 ;;
+ esac
else
HAVE_CBRTF=0
HAVE_DECL_CBRTF=0
+ fi
+ if test $HAVE_CBRTF = 0 || test $REPLACE_CBRTF = 1; then
dnl Find libraries needed to link lib/cbrtf.c.
AC_REQUIRE([gl_FUNC_FABSF])
AC_REQUIRE([gl_FUNC_FREXPF])
fi
AC_SUBST([CBRTF_LIBM])
])
+
+dnl Test whether cbrtf() works.
+dnl It returns wrong values on IRIX 6.5.
+AC_DEFUN([gl_FUNC_CBRTF_WORKS],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether cbrtf works], [gl_cv_func_cbrtf_works],
+ [
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+#include <math.h>
+volatile float x;
+volatile float y;
+int main ()
+{
+ extern
+ #ifdef __cplusplus
+ "C"
+ #endif
+ float cbrtf (float);
+ /* This test fails on IRIX 6.5. */
+ x = - 0.0f;
+ y = cbrtf (x);
+ if (!(y == 0.0f))
+ return 1;
+ return 0;
+}
+]])],
+ [gl_cv_func_cbrtf_works=yes],
+ [gl_cv_func_cbrtf_works=no],
+ [case "$host_os" in
+ irix*) gl_cv_func_cbrtf_works="guessing no";;
+ *) gl_cv_func_cbrtf_works="guessing yes";;
+ esac
+ ])
+ ])
+])
-# math_h.m4 serial 77
+# math_h.m4 serial 78
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,
HAVE_DECL_TRUNC=1; AC_SUBST([HAVE_DECL_TRUNC])
HAVE_DECL_TRUNCF=1; AC_SUBST([HAVE_DECL_TRUNCF])
HAVE_DECL_TRUNCL=1; AC_SUBST([HAVE_DECL_TRUNCL])
+ REPLACE_CBRTF=0; AC_SUBST([REPLACE_CBRTF])
REPLACE_CEIL=0; AC_SUBST([REPLACE_CEIL])
REPLACE_CEILF=0; AC_SUBST([REPLACE_CEILF])
REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL])
Depends-on:
math
-isfinite [test $HAVE_CBRTF = 0]
-fabsf [test $HAVE_CBRTF = 0]
-frexpf [test $HAVE_CBRTF = 0]
-ldexpf [test $HAVE_CBRTF = 0]
+isfinite [test $HAVE_CBRTF = 0 || test $REPLACE_CBRTF = 1]
+fabsf [test $HAVE_CBRTF = 0 || test $REPLACE_CBRTF = 1]
+frexpf [test $HAVE_CBRTF = 0 || test $REPLACE_CBRTF = 1]
+ldexpf [test $HAVE_CBRTF = 0 || test $REPLACE_CBRTF = 1]
configure.ac:
gl_FUNC_CBRTF
-if test $HAVE_CBRTF = 0; then
+if test $HAVE_CBRTF = 0 || test $REPLACE_CBRTF = 1; then
AC_LIBOBJ([cbrtf])
fi
gl_MATH_MODULE_INDICATOR([cbrtf])
-e 's|@''HAVE_DECL_TRUNCF''@|$(HAVE_DECL_TRUNCF)|g' \
-e 's|@''HAVE_DECL_TRUNCL''@|$(HAVE_DECL_TRUNCL)|g' \
| \
- sed -e 's|@''REPLACE_CEIL''@|$(REPLACE_CEIL)|g' \
+ sed -e 's|@''REPLACE_CBRTF''@|$(REPLACE_CBRTF)|g' \
+ -e 's|@''REPLACE_CEIL''@|$(REPLACE_CEIL)|g' \
-e 's|@''REPLACE_CEILF''@|$(REPLACE_CEILF)|g' \
-e 's|@''REPLACE_CEILL''@|$(REPLACE_CEILL)|g' \
-e 's|@''REPLACE_FABSL''@|$(REPLACE_FABSL)|g' \