--- gcc/config/tm-convex1.h	2018/04/24 16:53:28	1.1
+++ gcc/config/tm-convex1.h	2018/04/24 16:57:23	1.1.1.2
@@ -6,3 +6,19 @@
 #define TARGET_DEFAULT 1
 
 #define CC1_SPEC "%{mc2:-mnoc1}"
+
+/* Include Posix prototypes unless -traditional. */
+
+#define CPP_SPEC \
+"%{mc2:-D__convex_c2__}%{!mc2:-D__convex_c1__}\
+ -D__NO_INLINE_MATH\
+ %{!traditional:-D__stdc__ -D_POSIX_SOURCE -D_CONVEX_SOURCE}"
+
+/* Search Posix or else backward-compatible libraries depending
+   on -traditional. */
+
+#define LIB_SPEC \
+"%{mc2:-lC2}%{!mc2:-lC1}\
+ %{!p:%{!pg:%{traditional:-lc_old}%{!traditional:-lc}}}\
+%{p:%{traditional:-lc_old_p}%{!traditional:-lc_p}}\
+%{pg:%{traditional:-lc_old_p}%{!traditional:-lc_p}}"