X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/43ff44e918b762b98b495a91fcd4f0d2f8049bce..158d713722a1635939f699a8ea1605e937866bfc:/src/OS/Makefile-SunOS5

diff --git a/src/OS/Makefile-SunOS5 b/src/OS/Makefile-SunOS5
index 568e99f1c..557c031fd 100644
--- a/src/OS/Makefile-SunOS5
+++ b/src/OS/Makefile-SunOS5
@@ -1,7 +1,5 @@
 # Exim: OS-specific make file for SunOS5
 
-CFLAGS=-O
-
 HAVE_ICONV=yes
 
 BASENAME_COMMAND=look_for_it
@@ -20,5 +18,6 @@ XLFLAGS=-L$(X11)/lib -R$(X11)/lib
 X11LIB=$(X11)/lib
 
 OS_C_INCLUDES=setenv.c
+CFLAGS += -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED=1 -D__EXTENSIONS__
 
 # End