Add Elrood's patch to output LDC and LLVM source revs.

dmd2/mars.c

@@ -39,7 +39,7 @@
 #include "gen/logger.h"
 #include "gen/linker.h"
 
-#include "llvm/Config/config.h"
+#include "revisions.h"
 
 void getenv_setargv(const char *envvar, int *pargc, char** *pargv);
 
@@ -152,8 +152,8 @@ extern void backend_term();
 
 void usage()
 {
-    printf("LLVM D Compiler %s (based on DMD %s and %s)\n%s\n%s\n",
-    global.ldc_version, global.version, PACKAGE_STRING, global.copyright, global.written);
+    printf("LLVM D Compiler %s\nbased on DMD %s and %s\n%s\n%s\n",
+    global.ldc_version, global.version, global.llvm_version, global.copyright, global.written);
     printf("\
 D Language Documentation: http://www.digitalmars.com/d/2.0/index.html\n\
 LDC Homepage: http://www.dsource.org/projects/ldc\n\

dmd2/mars.h

@@ -193,6 +193,7 @@ struct Global
     int structalign;
     const char *version;
     const char *ldc_version;
+    const char *llvm_version;
 
     Param params;
     unsigned errors;	// number of errors reported so far