Description: Include unistd.h to make sure the swab function is not
 implicitely declared, also declare _XOPEN_SOURCE to have it available
 through unistd.h, and therefore declare _GNU_SOURCE to have
 strcasecmp() and vsnprintf()
Author: Didier Raboud <odyx@debian.org>
Last-Update: 2014-01-08
--- a/icc2ps/cmsio1.c
+++ b/icc2ps/cmsio1.c
@@ -71,6 +71,7 @@
 #undef STEP
 }
 #else
+#include <unistd.h>
 #define xswab swab
 #endif
 
--- a/icc2ps/Makefile
+++ b/icc2ps/Makefile
@@ -10,6 +10,10 @@
 	cmslut.c cmsmatsh.c cmsmtrx.c cmsnamed.c cmspack.c cmspcs.c cmsps2.c \
 	cmssamp.c cmswtpnt.c cmsxform.c cmsio0.c cmsvirt.c
 CFLAGS+=	-O3
+
+# _XOPEN_SOURCE is required for swab() but undefines strcasecmp(), so add _GNU_SOURCE as well:
+CFLAGS+= -D_XOPEN_SOURCE -D_GNU_SOURCE
+
 INSTALL=install
 ifeq ($(UNAME),SunOS)
     INSTALL=/usr/ucb/install