--- gcc/config/m68k/x-hp320	2018/04/24 18:10:24	1.1.1.1
+++ gcc/config/m68k/x-hp320	2018/04/24 18:28:04	1.1.1.2
@@ -12,3 +12,6 @@ TAROUTOPTS = xpf
 # You must set CFLAGS to empty on version 5.
 
 # You must get alloca.c from GNU Emacs.
+
+# So putenv and other functions get seen by fixproto.
+FIXPROTO_DEFINES = -D_HPUX_SOURCE