Use hidden visibility for JPEG lib when we build it. b=359461 r=bsmedberg

config/Makefile.in

@@ -118,6 +118,7 @@ export::
 		-DMOZ_ENABLE_LIBXUL=$(MOZ_ENABLE_LIBXUL) \
 		-DMOZ_NATIVE_ZLIB=$(MOZ_NATIVE_ZLIB) \
 		-DMOZ_NATIVE_PNG=$(MOZ_NATIVE_PNG) \
+		-DMOZ_NATIVE_JPEG=$(MOZ_NATIVE_JPEG) \
 		$(srcdir)/system-headers | $(PERL) $(topsrcdir)/nsprpub/config/make-system-wrappers.pl system_wrappers
 	$(INSTALL) system_wrappers $(DIST)/include
 endif

config/system-headers

@@ -287,7 +287,9 @@ JavaVM/jni.h
 JManager.h
 JNIEnvTests.h
 jni.h
+#if MOZ_NATIVE_JPEG==1
 jpeglib.h
+#endif
 JVMManagerTests.h
 Kerberos/Kerberos.h
 kernel/image.h

jpeg/jmorecfg.h

@@ -201,6 +201,7 @@ typedef unsigned int JDIMENSION;
 
 /* Mozilla mod: make external functions be DLL-able via JRI_PUBLIC_API(),
  * and supply extern "C" for C++ users of the C-compiled IJG library.
+ * (Well, not anymore, but there's still a modification here.)
  */
 #include "prtypes.h"
 
@@ -210,15 +211,8 @@ typedef unsigned int JDIMENSION;
 #define LOCAL(type)		static type
 
 PR_BEGIN_EXTERN_C
-#ifdef MOZ_ENABLE_LIBXUL
 #define GLOBAL(type) type
 #define EXTERN(type) extern type
-#else
-/* a function referenced thru EXTERNs: */
-#define GLOBAL(type)		PR_IMPLEMENT(type)
-/* a reference to a GLOBAL function: */
-#define EXTERN(type)		PR_EXTERN(type)
-#endif
 PR_END_EXTERN_C