From dc8bb6a53bfdfe42d9ae81d4e78c6155ad4bfd6e Mon Sep 17 00:00:00 2001
From: Michael Heimpold <mhei@heimpold.de>
Date: Sun, 17 May 2015 16:50:50 +0200
Subject: [PATCH] ext/opcache: fix detection of shm/mmap

The detection of sysvipc and mmap doesn't work well when cross-compiling,
so I decided to only check for the availability of the functions involved.
This is not a clean solution, but works for now(tm) :-)

It should be discussed with upstream to find a better solution.

This solves the issue reported at
https://github.com/openwrt/packages/issues/1010
and makes opcache usable on OpenWrt.

Signed-off-by: Michael Heimpold <mhei@heimpold.de>
---
 ext/opcache/config.m4 |  122 ++-----------------------------------------------
 1 file changed, 4 insertions(+), 118 deletions(-)

diff --git a/ext/opcache/config.m4 b/ext/opcache/config.m4
index b7e4835..7b6c0aa 100644
--- a/ext/opcache/config.m4
+++ b/ext/opcache/config.m4
@@ -28,127 +28,13 @@ if test "$PHP_OPCACHE" != "no"; then
 
   AC_CHECK_HEADERS([unistd.h sys/uio.h])
 
-  AC_MSG_CHECKING(for sysvipc shared memory support)
-  AC_TRY_RUN([
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/ipc.h>
-#include <sys/shm.h>
-#include <unistd.h>
-#include <string.h>
-
-int main() {
-  pid_t pid;
-  int status;
-  int ipc_id;
-  char *shm;
-  struct shmid_ds shmbuf;
-
-  ipc_id = shmget(IPC_PRIVATE, 4096, (IPC_CREAT | SHM_R | SHM_W));
-  if (ipc_id == -1) {
-    return 1;
-  }
-
-  shm = shmat(ipc_id, NULL, 0);
-  if (shm == (void *)-1) {
-    shmctl(ipc_id, IPC_RMID, NULL);
-    return 2;
-  }
-
-  if (shmctl(ipc_id, IPC_STAT, &shmbuf) != 0) {
-    shmdt(shm);
-    shmctl(ipc_id, IPC_RMID, NULL);
-    return 3;
-  }
-
-  shmbuf.shm_perm.uid = getuid();
-  shmbuf.shm_perm.gid = getgid();
-  shmbuf.shm_perm.mode = 0600;
-
-  if (shmctl(ipc_id, IPC_SET, &shmbuf) != 0) {
-    shmdt(shm);
-    shmctl(ipc_id, IPC_RMID, NULL);
-    return 4;
-  }
-
-  shmctl(ipc_id, IPC_RMID, NULL);
-
-  strcpy(shm, "hello");
-
-  pid = fork();
-  if (pid < 0) {
-    return 5;
-  } else if (pid == 0) {
-    strcpy(shm, "bye");
-    return 6;
-  }
-  if (wait(&status) != pid) {
-    return 7;
-  }
-  if (!WIFEXITED(status) || WEXITSTATUS(status) != 6) {
-    return 8;
-  }
-  if (strcmp(shm, "bye") != 0) {
-    return 9;
-  }
-  return 0;
-}
-],dnl
+  AC_CHECK_FUNC(shmget,[
     AC_DEFINE(HAVE_SHM_IPC, 1, [Define if you have SysV IPC SHM support])
-    msg=yes,msg=no,msg=no)
-  AC_MSG_RESULT([$msg])
-
-  AC_MSG_CHECKING(for mmap() using MAP_ANON shared memory support)
-  AC_TRY_RUN([
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/mman.h>
-#include <unistd.h>
-#include <string.h>
-
-#ifndef MAP_ANON
-# ifdef MAP_ANONYMOUS
-#  define MAP_ANON MAP_ANONYMOUS
-# endif
-#endif
-#ifndef MAP_FAILED
-# define MAP_FAILED ((void*)-1)
-#endif
-
-int main() {
-  pid_t pid;
-  int status;
-  char *shm;
-
-  shm = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0);
-  if (shm == MAP_FAILED) {
-    return 1;
-  }
-
-  strcpy(shm, "hello");
+  ])
 
-  pid = fork();
-  if (pid < 0) {
-    return 5;
-  } else if (pid == 0) {
-    strcpy(shm, "bye");
-    return 6;
-  }
-  if (wait(&status) != pid) {
-    return 7;
-  }
-  if (!WIFEXITED(status) || WEXITSTATUS(status) != 6) {
-    return 8;
-  }
-  if (strcmp(shm, "bye") != 0) {
-    return 9;
-  }
-  return 0;
-}
-],dnl
+  AC_CHECK_FUNC(mmap,[
     AC_DEFINE(HAVE_SHM_MMAP_ANON, 1, [Define if you have mmap(MAP_ANON) SHM support])
-    msg=yes,msg=no,msg=no)
-  AC_MSG_RESULT([$msg])
+  ])
 
   AC_MSG_CHECKING(for mmap() using /dev/zero shared memory support)
   AC_TRY_RUN([
-- 
1.7.10.4