--- gcc/config/i386/aix386ng.h	2018/04/24 18:10:27	1.1
+++ gcc/config/i386/aix386ng.h	2018/04/24 18:16:52	1.1.1.2
@@ -43,7 +43,7 @@ the Free Software Foundation, 675 Mass A
 
 /* Specify predefined symbols in preprocessor.  */
 
-#define CPP_PREDEFINES "-Dps2 -Dunix -Di386"
+#define CPP_PREDEFINES "-Dps2 -Dunix -Di386 -Asystem(unix) -Asystem(aix) -Acpu(i386) -Amachine(i386)"
 
 #define CPP_SPEC \
   "%{posix:-D_POSIX_SOURCE}%{!posix:-DAIX} -D_I386 -D_AIX -D_MBCS"
@@ -57,7 +57,9 @@ the Free Software Foundation, 675 Mass A
 
 #undef ASM_FILE_START
 #define ASM_FILE_START(FILE) 					\
-  do { fprintf (FILE, "\t.file\t\"%s\"\n", dump_base_name);	\
+  do { fprintf (FILE, "\t.file\t");				\
+       output_quoted_string (FILE, dump_base_name);		\
+       fprintf (FILE, "\n");					\
        if (optimize)						\
           ASM_FILE_START_1 (FILE); 				\
        else							\