apr: Cache configure tests which use AC_TRY_RUN

AC_TRY_RUN macro means the test needs to run to find the result and we
are cross compiling so this will always get wrong results, this results
in miscompiling apache2 on musl because it disables rlimit
(ac_cv_struct_rlimit) wrongly.

All these variables are determined with AC_TRY_RUN checks

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
(cherry picked from commit 504eb0ff1cae200ee85ec18ebae564cae9bf9c8c)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 62 insertions, 0 deletions

diff --git a/meta/recipes-support/apr/apr/0001-configure-Remove-runtime-test-for-mmap-that-can-map-.patch b/meta/recipes-support/apr/apr/0001-configure-Remove-runtime-test-for-mmap-that-can-map-.patch
new file mode 100644
index 0000000000..fa6202da79
--- /dev/null
+++ b/meta/recipes-support/apr/apr/0001-configure-Remove-runtime-test-for-mmap-that-can-map-.patch
@@ -0,0 +1,62 @@
+From ee728971fd9d2da39356f1574d58d5daa3b24520 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Fri, 26 Aug 2022 00:28:08 -0700
+Subject: [PATCH] configure: Remove runtime test for mmap that can map
+ /dev/zero
+
+This never works for cross-compile moreover it ends up disabling
+ac_cv_file__dev_zero which then results in compiler errors in shared
+mutexes
+
+Upstream-Status: Inappropriate [Cross-compile specific]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ configure.in | 32 --------------------------------
+ 1 file changed, 32 deletions(-)
+
+diff --git a/configure.in b/configure.in
+index a99049d..f1f55c7 100644
+--- a/configure.in
++++ b/configure.in
+@@ -1182,38 +1182,6 @@ AC_CHECK_FUNCS([mmap munmap shm_open shm_unlink shmget shmat shmdt shmctl \
+ APR_CHECK_DEFINE(MAP_ANON, sys/mman.h)
+ AC_CHECK_FILE(/dev/zero)
+ 
+-# Not all systems can mmap /dev/zero (such as HP-UX).  Check for that.
+-if test "$ac_cv_func_mmap" = "yes" &&
+-   test "$ac_cv_file__dev_zero" = "yes"; then
+-    AC_MSG_CHECKING(for mmap that can map /dev/zero)
+-    AC_TRY_RUN([
+-#include <sys/types.h>
+-#include <sys/stat.h>
+-#include <fcntl.h>
+-#ifdef HAVE_SYS_MMAN_H
+-#include <sys/mman.h>
+-#endif
+-    int main()
+-    {
+-        int fd;
+-        void *m;
+-        fd = open("/dev/zero", O_RDWR);
+-        if (fd < 0) {
+-            return 1;
+-        }
+-        m = mmap(0, sizeof(void*), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+-        if (m == (void *)-1) {  /* aka MAP_FAILED */
+-            return 2;
+-        }
+-        if (munmap(m, sizeof(void*)) < 0) {
+-            return 3;
+-        }
+-        return 0;
+-    }], [], [ac_cv_file__dev_zero=no], [ac_cv_file__dev_zero=no])
+-
+-    AC_MSG_RESULT($ac_cv_file__dev_zero)
+-fi
+-
+ # Now we determine which one is our anonymous shmem preference.
+ haveshmgetanon="0"
+ havemmapzero="0"
+-- 
+2.37.2
+