Updates to make Linux work... still lost of issues.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@1157 0fc631ac-6414-0410-93d0-97cfa31319b6

configure.ac

@@ -6,7 +6,7 @@
 
 # Process this file with autoconf to produce a configure script.
 
-AC_INIT(magicseteditor, 0.3.4, twanvl@users.sourceforge.net)
+AC_INIT(magicseteditor, 0.3.7b, twanvl@users.sourceforge.net)
 AC_CONFIG_SRCDIR([src/main.cpp])
 # TODO: Actually use the config header
 AC_CONFIG_HEADER([src/config.h])
@@ -15,7 +15,8 @@ AM_INIT_AUTOMAKE([-Wall foreign])
 
 # Checks for programs.
 AC_PROG_CXX
-
+# Do not pass -O2, because that causes failures for now.
+CXXFLAGS=-g
 # Checks for libraries.
 # TODO: Check for boost
 
@@ -46,6 +47,48 @@ AC_FUNC_MALLOC
 AC_FUNC_SELECT_ARGTYPES
 AC_CHECK_FUNCS([floor memset pow select sqrt])
 
+AC_CACHE_CHECK([whether the compiler provides atomic builtins], [ap_cv_atomic_builtins],
+[AC_TRY_RUN([
+int main()
+{
+    unsigned long val = 1010, tmp, *mem = &val;
+
+    if (__sync_fetch_and_add(&val, 1010) != 1010 || val != 2020)
+        return 1;
+
+    tmp = val;
+
+    if (__sync_fetch_and_sub(mem, 1010) != tmp || val != 1010)
+        return 1;
+
+    if (__sync_sub_and_fetch(&val, 1010) != 0 || val != 0)
+        return 1;
+
+    tmp = 3030;
+
+    if (__sync_val_compare_and_swap(mem, 0, tmp) != 0 || val != tmp)
+        return 1;
+
+    if (__sync_lock_test_and_set(&val, 4040) != 3030)
+        return 1;
+
+    mem = &tmp;
+
+    if (__sync_val_compare_and_swap(&mem, &tmp, &val) != &tmp)
+        return 1;
+
+    __sync_synchronize();
+
+    if (mem != &val)
+        return 1;
+
+    return 0;
+}], [ap_cv_atomic_builtins=yes], [ap_cv_atomic_builtins=no], [ap_cv_atomic_builtins=no])])
+
+if test "$ap_cv_atomic_builtins" = "yes"; then
+    AC_DEFINE(HAVE_GCC_ATOMIC_BUILTINS, 1, [Define if compiler provides atomic builtins])
+fi
+
 AC_OUTPUT([
 	Makefile
 ])