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[bug-gnulib] c-strtod patch for HP-UX pre 11.23
From: |
Paul Eggert |
Subject: |
[bug-gnulib] c-strtod patch for HP-UX pre 11.23 |
Date: |
Fri, 24 Dec 2004 00:39:21 -0800 |
User-agent: |
Gnus/5.1006 (Gnus v5.10.6) Emacs/21.3 (gnu/linux) |
I installed this to work around the problem that older versions of
HP-UX have a strtold function that returns a struct rather than long
double.
2004-12-24 Paul Eggert <address@hidden>
* lib/c-strtod.c (STRTOD): Depend on HAVE_C99_STRTOLD, not
HAVE_DECL_STRTOLD.
* m4/c-strtod.m4 (gl_C99_STRTOLD): New macro.
(gl_C_STRTOD): Use it instead of AC_CHECK_DECLS_ONCE(strtold).
Index: lib/c-strtod.c
===================================================================
RCS file: /cvsroot/gnulib/gnulib/lib/c-strtod.c,v
retrieving revision 1.3
retrieving revision 1.4
diff -p -u -r1.3 -r1.4
--- lib/c-strtod.c 8 Sep 2004 23:09:22 -0000 1.3
+++ lib/c-strtod.c 24 Dec 2004 08:35:58 -0000 1.4
@@ -39,8 +39,8 @@
# define STRTOD_L strtod_l
#endif
-/* c_strtold falls back on strtod if strtold isn't declared. */
-#if LONG && HAVE_DECL_STRTOLD
+/* c_strtold falls back on strtod if strtold doesn't conform to C99. */
+#if LONG && HAVE_C99_STRTOLD
# define STRTOD strtold
#else
# define STRTOD strtod
Index: m4/c-strtod.m4
===================================================================
RCS file: /cvsroot/gnulib/gnulib/m4/c-strtod.m4,v
retrieving revision 1.1
retrieving revision 1.2
diff -p -u -r1.1 -r1.2
--- m4/c-strtod.m4 5 Aug 2004 23:27:27 -0000 1.1
+++ m4/c-strtod.m4 24 Dec 2004 08:36:41 -0000 1.2
@@ -1,4 +1,4 @@
-# c-strtod.m4 serial 3
+# c-strtod.m4 serial 4
# Copyright (C) 2004 Free Software Foundation, Inc.
@@ -18,6 +18,32 @@
# Written by Paul Eggert.
+AC_DEFUN([gl_C99_STRTOLD],
+[
+ AC_CACHE_CHECK([whether strtold conforms to C99],
+ [gl_cv_func_c99_strtold],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[/* On HP-UX before 11.23, strtold returns a struct instead of
+ long double. Reject implementations like that, by requiring
+ compatibility with the C99 prototype. */
+ #include <stdlib.h>
+ static long double (*p) (char const *, char **) = strtold;
+ static long double
+ test (char const *nptr, char **endptr)
+ {
+ long double r;
+ r = strtold (nptr, endptr);
+ return r;
+ }]],
+ [[return test ("1.0", NULL) != 1 || p ("1.0", NULL) != 1;]])],
+ [gl_cv_func_c99_strtold=yes],
+ [gl_cv_func_c99_strtold=no])])
+ if test $gl_cv_func_c99_strtold = yes; then
+ AC_DEFINE([HAVE_C99_STRTOLD], 1, [Define to 1 if strtold conforms to C99.])
+ fi
+])
+
AC_DEFUN([gl_C_STRTOD],
[
dnl Prerequisites of lib/c-strtod.c.
@@ -29,5 +55,6 @@ AC_DEFUN([gl_C_STRTOLD],
[
dnl Prerequisites of lib/c-strtold.c.
AC_REQUIRE([gl_C_STRTOD])
- AC_CHECK_DECLS_ONCE([strtold])
+ AC_REQUIRE([gl_C99_STRTOLD])
+ :
])
- [bug-gnulib] c-strtod patch for HP-UX pre 11.23,
Paul Eggert <=