template/ruby-runner.c.in: POSIX for setenv

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52010 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

Makefile.in

@@ -256,7 +256,7 @@ ruby-runner.c: template/ruby-runner.c.in
 		@./config.status --file=$@:$(srcdir)/template/$(@F).in
 
 ruby-runner$(EXEEXT): ruby-runner.c
-	$(Q) $(PURIFY) $(CC) $(LDFLAGS) $(LIBS) $(OUTFLAG)$@ ruby-runner.c
+	$(Q) $(PURIFY) $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(LIBS) $(OUTFLAG)$@ ruby-runner.c
 
 $(RBCONFIG): $($(CROSS_COMPILING:no=)PREP)
 

template/ruby-runner.c.in

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 200809L
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>