buildroot/package/samba4/samba4-0005-build-find-blkcnt_t-size-via-array.patch

From 934f8c8e9439de4f15b2e61016d5d29233d8d5fa Mon Sep 17 00:00:00 2001
From: Gustavo Zacarias <gustavo@zacarias.com.ar>
Date: Wed, 16 Apr 2014 08:01:36 -0300
Subject: [PATCH 5/5] build: find blkcnt_t size via array

Using the same trick as commit 0d9bb86293c9d39298786df095c73a6251b08b7e
find blkcnt_t size via an array so that it can be determined via build
rather than running it.

Status: Upstream.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
---
 source3/wscript | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/source3/wscript b/source3/wscript
index aade503..6a5728f 100644
--- a/source3/wscript
+++ b/source3/wscript
@@ -277,18 +277,20 @@ int main(int argc, char **argv)
                                 headers='sys/types.h sys/stat.h unistd.h')
 
     if "HAVE_BLKCNT_T" in conf.env:
-	conf.CHECK_CODE('''
-	return sizeof(blkcnt_t) == 4 ? 0 : 1''',
-		'SIZEOF_BLKCNT_T_4', execute=True,
-		headers='replace.h sys/types.h sys/stat.h unistd.h',
-		msg="Checking whether blkcnt_t is 32 bit")
+        conf.CHECK_CODE('''
+        static int test_array[1 - 2 * !(((long int)(sizeof(blkcnt_t))) <= 4)];''',
+                'SIZEOF_BLKCNT_T_4',
+                headers='replace.h sys/types.h sys/stat.h unistd.h',
+                msg="Checking whether blkcnt_t is 32 bit")
 
+    # If sizeof is 4 it can't be 8
     if "HAVE_BLKCNT_T" in conf.env:
-	conf.CHECK_CODE('''
-	return sizeof(blkcnt_t) == 8 ? 0 : 1''',
-		'SIZEOF_BLKCNT_T_8', execute=True,
-		headers='replace.h sys/types.h sys/stat.h unistd.h',
-		msg="Checking whether blkcnt_t is 64 bit")
+        if not conf.CONFIG_SET('SIZEOF_BLKCNT_T_4'):
+            conf.CHECK_CODE('''
+            static int test_array[1 - 2 * !(((long int)(sizeof(blkcnt_t))) <= 8)];''',
+                    'SIZEOF_BLKCNT_T_8',
+                    headers='replace.h sys/types.h sys/stat.h unistd.h',
+                    msg="Checking whether blkcnt_t is 64 bit")
 
     # Check for POSIX capability support
     conf.CHECK_FUNCS_IN('cap_get_proc', 'cap', headers='sys/capability.h')
-- 
1.8.3.2