* make autoconf tests work with -Werror=implicit-function-declaration
@ 2019-09-14 17:50 Bruno Haible
2019-09-15 17:04 ` Jim Meyering
0 siblings, 1 reply; 2+ messages in thread
From: Bruno Haible @ 2019-09-14 17:50 UTC (permalink / raw)
To: bug-gnulib; +Cc: Florian Weimer
There are indications that future GCC versions may be stricter regarding
invocations of undeclared functions. [1] Configuring with
CC="gcc -Werror=implicit-function-declaration"
is a way to exercise similar functionality with released GCCs.
So, what I did is
1. create a testdir of all of gnulib,
2. configure it once with CC="gcc" and once with
CC="gcc -Werror=implicit-function-declaration", both with option '-C',
3. compare the resulting config.cache files.
I got differences in the cache variables
gl_cv_func_ptsname_sets_errno
gt_cv_locale_tr_utf8
This patch fixes the issues.
[1] https://lists.gnu.org/archive/html/bug-gettext/2019-09/msg00012.html
2019-09-14 Bruno Haible <bruno@clisp.org>
Make autoconf tests work with -Werror=implicit-function-declaration.
* m4/locale-tr.m4 (gt_LOCALE_TR_UTF8): Include <wctype.h>, for
towupper() declaration.
* m4/ptsname.m4 (gl_FUNC_PTSNAME): Include <stdlib.h>, for ptsname()
declaration.
diff --git a/m4/locale-tr.m4 b/m4/locale-tr.m4
index aeb2419..4c413f0 100644
--- a/m4/locale-tr.m4
+++ b/m4/locale-tr.m4
@@ -1,4 +1,4 @@
-# locale-tr.m4 serial 11
+# locale-tr.m4 serial 12
dnl Copyright (C) 2003, 2005-2019 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -21,6 +21,7 @@ changequote(,)dnl
#endif
#include <stdlib.h>
#include <string.h>
+#include <wctype.h>
struct tm t;
char buf[16];
int main () {
diff --git a/m4/ptsname.m4 b/m4/ptsname.m4
index 5033d90..04bfd3b 100644
--- a/m4/ptsname.m4
+++ b/m4/ptsname.m4
@@ -1,4 +1,4 @@
-# ptsname.m4 serial 7
+# ptsname.m4 serial 8
dnl Copyright (C) 2010-2019 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -19,10 +19,12 @@ AC_DEFUN([gl_FUNC_PTSNAME],
AC_CACHE_CHECK([whether ptsname sets errno on failure],
[gl_cv_func_ptsname_sets_errno],
[AC_RUN_IFELSE(
- [AC_LANG_PROGRAM([[#include <errno.h>
- ]], [[
- return ptsname (-1) || !errno;
- ]])],
+ [AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ #include <errno.h>
+ ]], [[
+ return ptsname (-1) || !errno;
+ ]])],
[gl_cv_func_ptsname_sets_errno=yes],
[gl_cv_func_ptsname_sets_errno=no],
[case "$host_os" in
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: make autoconf tests work with -Werror=implicit-function-declaration
2019-09-14 17:50 make autoconf tests work with -Werror=implicit-function-declaration Bruno Haible
@ 2019-09-15 17:04 ` Jim Meyering
0 siblings, 0 replies; 2+ messages in thread
From: Jim Meyering @ 2019-09-15 17:04 UTC (permalink / raw)
To: Bruno Haible; +Cc: Florian Weimer, bug-gnulib@gnu.org List
On Sat, Sep 14, 2019 at 10:51 AM Bruno Haible <bruno@clisp.org> wrote:
> There are indications that future GCC versions may be stricter regarding
> invocations of undeclared functions. [1] Configuring with
> CC="gcc -Werror=implicit-function-declaration"
> is a way to exercise similar functionality with released GCCs.
>
> So, what I did is
> 1. create a testdir of all of gnulib,
> 2. configure it once with CC="gcc" and once with
> CC="gcc -Werror=implicit-function-declaration", both with option '-C',
> 3. compare the resulting config.cache files.
>
> I got differences in the cache variables
> gl_cv_func_ptsname_sets_errno
> gt_cv_locale_tr_utf8
>
> This patch fixes the issues.
>
> [1] https://lists.gnu.org/archive/html/bug-gettext/2019-09/msg00012.html
Thanks for your constant vigilance and all the proactive work on gnulib.
^ permalink raw reply [flat|nested] 2+ messages in thread
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