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configure: Modernize configure.ac a bit (#470)

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... to make 2.71 happy. Also increase minimum version to 2.69 (10 years
old version so should be compatible enough).

Signed-off-by: Jan Friesse <jfriesse@redhat.com>
This commit is contained in:
Jan Friesse 2022-07-27 09:00:19 +02:00 committed by GitHub
parent 8325d84047
commit 14507d538d
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 19 additions and 21 deletions
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40
configure.ac
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@ -1,7 +1,7 @@
# Process this file with autoconf to produce a configure script.
AC_PREREQ([2.61])
AC_PREREQ([2.69])
dnl inject zero as a "patch" component of the version if missing in tag;
dnl care to bump "X.Y.Z-yank" template below upon each release very desirable
@ -41,7 +41,7 @@ LDFLAGS="$saved_LDFLAGS"
AC_CONFIG_MACRO_DIR([m4])
AC_CANONICAL_HOST
AC_PROG_LIBTOOL
LT_INIT
AC_LANG([C])
dnl Fix default variables - "prefix" variable if not specified
@ -82,7 +82,7 @@ AC_PROG_AWK
AC_PROG_CC
AC_PROG_CPP
AM_PROG_CC_C_O
AC_PROG_CC_C99
m4_version_prereq([2.70], [:], [AC_PROG_CC_C99])
if test "x$ac_cv_prog_cc_c99" = "xno"; then
AC_MSG_ERROR(["C99 support is required"])
fi
@ -188,7 +188,6 @@ fi
AC_SUBST(DOXYGEN2MAN)
# Checks for header files.
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS([arpa/inet.h link.h fcntl.h inttypes.h limits.h netinet/in.h \
@ -222,8 +221,7 @@ AC_CHECK_MEMBER([struct sockaddr_un.sun_len],
[#include <sys/un.h>])
AC_MSG_CHECKING(looking for union semun in sys/sem.h)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#include <sys/types.h>
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>]],
[[union semun arg; semctl(0, 0, 0, arg);]])],
@ -266,26 +264,26 @@ AX_RESTORE_FLAGS
# Checks for defined macros
AC_MSG_CHECKING(for MSG_NOSIGNAL)
AC_TRY_COMPILE([#include <sys/socket.h>],
[ int f = MSG_NOSIGNAL; ],
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]],
[[ int f = MSG_NOSIGNAL; ]])],
[ AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_MSG_NOSIGNAL, 1,
[Define this symbol if you have MSG_NOSIGNAL])],
[ AC_MSG_RESULT(no)])
AC_MSG_CHECKING(for SO_NOSIGPIPE )
AC_TRY_COMPILE([#include <sys/socket.h>],
[ int f = SO_NOSIGPIPE; ],
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]],
[[ int f = SO_NOSIGPIPE; ]])],
[ AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_SO_NOSIGPIPE, 1,
[Define this symbol if you have SO_NOSIGPIPE]) ],
[ AC_MSG_RESULT(no)])
AC_MSG_CHECKING([for RTLD_NEXT])
AC_TRY_COMPILE([#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <dlfcn.h>],
[ void *h = RTLD_NEXT; ],
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <dlfcn.h>]],
[[ void *h = RTLD_NEXT; ]])],
[ AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_FAILURE_INJECTION], 1,
[have failure injection])
@ -455,12 +453,12 @@ AC_MSG_CHECKING([whether GCC supports builtin sync intrinsics])
if test -z "$gcc_has_builtin_sync_operations"; then
gcc_has_builtin_sync_operations=no
if test x"$GCC" = xyes && test x$have_mingw != xyes; then
AC_TRY_LINK([],
[int i;
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
[[int i;
__sync_synchronize ();
__sync_bool_compare_and_swap (&i, 0, 1);
__sync_fetch_and_add (&i, 1);
],
]])],
[gcc_has_builtin_sync_operations=yes],
[gcc_has_builtin_sync_operations=no])
fi
@ -479,11 +477,11 @@ AC_MSG_CHECKING([whether GCC supports builtin atomic intrinsics])
if test -z "$gcc_has_builtin_atomic_operations"; then
gcc_has_builtin_atomic_operations=no
if test x"$GCC" = xyes && test x$have_mingw != xyes; then
AC_TRY_LINK([],
[int i;
AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
[[int i;
__atomic_load_n(&i, __ATOMIC_ACQUIRE);
__atomic_exchange_n(&i, 0, __ATOMIC_RELEASE);
],
]])],
[gcc_has_builtin_atomic_operations=yes],
[gcc_has_builtin_atomic_operations=no])
fi