[bug #38190] base fails to detect whether objc really works with clang/libobjc2

[Sebastian Reitenbach]

URL:
  <http://savannah.gnu.org/bugs/?38190>

                 Summary: base fails to detect whether objc really works with
clang/libobjc2
                 Project: GNUstep
            Submitted by: buzzdee
            Submitted on: Di 29 Jan 2013 10:19:12 GMT
                Category: Base/Foundation
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

I'm on OpenBSD 5.2 -current, using libobjc2 from svn, and clang 3.2

When the configure script comes to the stage that it is testing whether objc
really works, it miserably fails.
I found it working with the last release.

Copying the config/objc-common.g file from the release to the SVN, makes the
gnustep-base SVN configure pass that test successfully.

$ diff -u gnustep-base-1.24.0/gnustep-base-1.24.0/config/objc-common.g
gnustep-base-1.25.0/gnustep-base-1.25.0/config/objc-common.g 
--- gnustep-base-1.24.0/gnustep-base-1.24.0/config/objc-common.g        Wed
Aug 17 13:46:06 2011
+++ gnustep-base-1.25.0/gnustep-base-1.25.0/config/objc-common.g        Mon
Jan 28 18:51:42 2013
@@ -16,10 +16,17 @@
 #include <objc/hooks.h>
 #endif
 
+
+#if HAVE_OBJC_ROOT_CLASS_ATTRIBUTE
+#define GS_OBJC_ROOT_CLASS __attribute__((objc_root_class))
+#else
+#define GS_OBJC_ROOT_CLASS
+#endif
+
 /* Provide an implementation of NXConstantString for an old libobjc when
    built stand-alone without an NXConstantString implementation.  */
 #if !defined(NeXT_RUNTIME) && !defined(__GNUSTEP_RUNTIME__)
-@implementation NXConstantString
+GS_OBJC_ROOT_CLASS @implementation NXConstantString
 - (const char*) cString
 {
   return 0;
@@ -34,7 +41,7 @@
 /* Provide dummy implementations for NSObject and NSConstantString
  * for libobjc2 which needs them.
  */
-@interface NSObject
+GS_OBJC_ROOT_CLASS @interface NSObject
 { 
  id isa;
 }





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