Remove private feature macros for Solaris from compiler flags

Makefile

@@ -16,7 +16,7 @@ CC:=$(shell sh -c 'type $(CC) 2>/dev/null 1>/dev/null && echo $(CC) || echo gcc'
 uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
 OPTIMIZATION?=-O3
 ifeq ($(uname_S),SunOS)
-  CFLAGS?=$(OPTIMIZATION) -fPIC -Wall -W -D__EXTENSIONS__ -D_XPG6 $(ARCH) $(PROF)
+  CFLAGS?=$(OPTIMIZATION) -fPIC -Wall -W $(ARCH) $(PROF)
   CCLINK?=-ldl -lnsl -lsocket
   LDFLAGS?=-L.
   DYLIBSUFFIX=so

async.c

@@ -29,6 +29,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "fmacros.h"
 #include <string.h>
 #include <strings.h>
 #include <assert.h>

test.c

@@ -1,3 +1,4 @@
+#include "fmacros.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>