Initial revision

From-SVN: r7846

gcc/config/i386/gnu.h

+/* Configuration for an i386 running GNU as the target machine.  */
+
+/* We do want to add an underscore to the front of each user symbol.
+   i386/gas.h checks this.  */
+#define YES_UNDERSCORES
+
+#include "i386/gstabs.h"
+
+/* Get perform_* macros to build libgcc.a.  */
+#include "i386/perform.h"
+
+#undef CPP_PREDEFINES
+#define CPP_PREDEFINES "-Dunix -Di386 -DMACH -Asystem(unix) -Asystem(mach) -Acpu(i386) -Amachine(i386) -D__GNU__ -Asystem(gnu)"
+
+/* Don't default to pcc-struct-return, because gcc is the only compiler, and
+   we want to retain compatibility with older gcc versions.  */
+#define DEFAULT_PCC_STRUCT_RETURN 0