98 lines
3.2 KiB
Diff
98 lines
3.2 KiB
Diff
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From 0b4daddf6b88b696daf54714448b8d89a615abf2 Mon Sep 17 00:00:00 2001
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From: Florian Weimer <fweimer@redhat.com>
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Date: Thu, 24 Nov 2022 13:06:50 +0100
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Subject: [PATCH 1/3] configure: Do not require support for implicit ints
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Implicit ints have not been part of C since 1999, and future
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compilers will disable support for them by default. Fortunatenly,
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only one configure check needs adjusting.
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---
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acinclude.m4 | 2 +-
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configure.ac | 2 +-
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2 files changed, 2 insertions(+), 2 deletions(-)
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diff --git a/acinclude.m4 b/acinclude.m4
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index 8b74ff1e5..b66042f9f 100644
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--- acinclude.m4
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+++ acinclude.m4
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@@ -30,7 +30,7 @@ if test "$ac_cv_func_select" = yes; then
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif],
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-[extern select ($ac_cv_type_fd_set_size_t,
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+[extern int select ($ac_cv_type_fd_set_size_t,
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$ac_cv_type_fd_set *, $ac_cv_type_fd_set *, $ac_cv_type_fd_set *,
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$ac_type_timeval *);],
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[ac_found=yes ; break 3],ac_found=no)
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diff --git a/configure.ac b/configure.ac
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index 97ab9e7a1..c9fcede6a 100644
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--- configure.ac
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+++ configure.ac
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@@ -220,7 +220,7 @@ AC_MINIX
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# catch -Werror and similar options when running configure
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AC_TRY_COMPILE([#include <stdio.h>],
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-[int i; static j; int *p; char *c;
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+[int i; int *p; char *c;
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switch (*p = p = *c) { case 0: printf("%Q", c, p); }
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*c = &i; c = p;
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while (1 || (unsigned int)3 >= 0 || ((int)-1) == ((unsigned int)1));
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From 6b9d100ae4e784821b5189474dc58e646417bcf6 Mon Sep 17 00:00:00 2001
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From: Florian Weimer <fweimer@redhat.com>
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Date: Thu, 24 Nov 2022 13:07:56 +0100
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Subject: [PATCH 2/3] acinclude.m4: Add missing <unistd.h> to
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AM_SAFETY_CHECK_MKSTEMP
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Otherwise, the check fails on a compiler which does not support
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implicit function declarations (a language feature removed in 1999).
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---
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acinclude.m4 | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/acinclude.m4 b/acinclude.m4
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index b66042f9f..4dee2abeb 100644
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--- acinclude.m4
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+++ acinclude.m4
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@@ -1154,6 +1154,9 @@ AC_DEFUN([AM_SAFETY_CHECK_MKSTEMP],[
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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+#ifdef HAVE_UNISTD_H
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+#include <unistd.h>
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+#endif
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int main(void)
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{
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char template[128];
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From 33537b8ae5a302e4016dc1c6cfe5577fb3fa36c9 Mon Sep 17 00:00:00 2001
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From: Florian Weimer <fweimer@redhat.com>
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Date: Tue, 19 Dec 2023 13:24:50 +0100
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Subject: [PATCH 3/3] configure: Further defang the -Werror check
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Incompatible pointer types are actually errors (in the sense
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that they are invalid C). Compilers have merely tolerated them as
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warnings for backwards compatibility. This is changing with Clang 16
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and GCC 14, so relax the check a little.
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---
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configure.ac | 5 ++---
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1 file changed, 2 insertions(+), 3 deletions(-)
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diff --git a/configure.ac b/configure.ac
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index c9fcede6a..2e9615b2b 100644
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--- configure.ac
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+++ configure.ac
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@@ -220,9 +220,8 @@ AC_MINIX
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# catch -Werror and similar options when running configure
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AC_TRY_COMPILE([#include <stdio.h>],
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-[int i; int *p; char *c;
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- switch (*p = p = *c) { case 0: printf("%Q", c, p); }
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- *c = &i; c = p;
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+[int unused; int *p; char *c;
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+ printf("%Q", c, p);
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while (1 || (unsigned int)3 >= 0 || ((int)-1) == ((unsigned int)1));
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], , AC_MSG_ERROR("
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configure is not able to compile programs with warnings. Please
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