Don't build code with _GNU_SOURCE, use _XOPEN_SOURCE=500 instead.

_GNU_SOURCE is only now for xbps_xasprintf() if vasprintf is found,
and only for <stdio.h>, it's unset immediately once the header is included.

bin/xbps-bin/main.c

@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2008-2010 Juan Romero Pardines.
+ * Copyright (c) 2008-2011 Juan Romero Pardines.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -27,6 +27,7 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <errno.h>
 #include <signal.h>
 #include <assert.h>

bin/xbps-bin/question.c

@@ -28,6 +28,7 @@
 #include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
+#include <strings.h>
 #include <ctype.h>
 
 #include "defs.h"

bin/xbps-repo/main.c

@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2008-2010 Juan Romero Pardines.
+ * Copyright (c) 2008-2011 Juan Romero Pardines.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -27,6 +27,7 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <errno.h>
 #include <limits.h>
 #include <libgen.h>

bin/xbps-uhelper/main.c

@@ -27,6 +27,7 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <errno.h>
 #include <ctype.h>
 #include <assert.h>

configure

@@ -184,9 +184,8 @@ fi
 
 case "$OS" in
 linux)
-	echo "CPPFLAGS += 	-D_XOPEN_SOURCE=600 -D_GNU_SOURCE" >>$CONFIG_MK
-	echo "CPPFLAGS += 	-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE" >> $CONFIG_MK
-	echo "CPPFLAGS += 	-D_LARGE_FILES" >> $CONFIG_MK
+	echo "CPPFLAGS += 	-D_XOPEN_SOURCE=500" >>$CONFIG_MK
+	echo "CPPFLAGS += 	-D_FILE_OFFSET_BITS=64" >> $CONFIG_MK
 	;;
 *)
 	;;

lib/Makefile

@@ -14,6 +14,7 @@ LIBPROP_OBJS += portableproplib/prop_stack.o portableproplib/prop_string.o
 LIBPROP_OBJS += portableproplib/prop_array_util.o portableproplib/prop_number.o
 LIBPROP_OBJS += portableproplib/prop_dictionary_util.o
 LIBPROP_OBJS += portableproplib/prop_data.o
+LIBPROP_CPPFLAGS = -D_GNU_SOURCE
 LIBPROP_CFLAGS = -Wno-old-style-definition -Wno-cast-qual -Wno-unused-parameter
 
 ifdef USE_EXTERNAL_PROPLIB
@@ -23,7 +24,7 @@ endif
 # libfetch
 LIBFETCH_OBJS = fetch/common.o fetch/fetch.o fetch/file.o
 LIBFETCH_OBJS += fetch/ftp.o fetch/http.o
-LIBFETCH_CPPFLAGS = -DFTP_COMBINE_CWDS -DNETBSD -DINET6 -DWITH_SSL
+LIBFETCH_CPPFLAGS = -D_GNU_SOURCE -DFTP_COMBINE_CWDS -DNETBSD -DINET6 -DWITH_SSL
 LIBFETCH_CFLAGS = -Wno-error -Wno-unused-macros -Wno-conversion
 ifdef HAVE_VISIBILITY
 LIBFETCH_SHLIBCFLAGS = -fvisibility=hidden
@@ -66,7 +67,8 @@ $(LIBFETCH_OBJS): %.o: %.c $(LIBFETCH_INCS) $(LIBFETCH_GEN)
 
 $(LIBPROP_OBJS): %.o: %.c
 	@printf " [CC]\t\t$@\n"
-	${SILENT}$(CC) $(CPPFLAGS) $(CFLAGS) $(LIBPROP_CFLAGS) -c $< -o $@
+	${SILENT}$(CC) $(CPPFLAGS) $(LIBPROP_CPPFLAGS) \
+		$(CFLAGS) $(LIBPROP_CFLAGS) -c $< -o $@
 
 $(OBJS): %.o: %.c
 	@printf " [CC]\t\t$@\n"

lib/cmpver.c

@@ -22,6 +22,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <ctype.h>
 
 #include <xbps_api.h>

lib/fexec.c

@@ -33,6 +33,7 @@
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #include <xbps_api.h>
 #include "xbps_api_impl.h"

lib/util.c

@@ -23,7 +23,13 @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#ifdef HAVE_VASPRINTF
+# define _GNU_SOURCE	/* for vasprintf(3) */
 # include <stdio.h>
+# undef _GNU_SOURCE
+#else
+# include <stdio.h>
+#endif
 #include <stdbool.h>
 #include <stdlib.h>
 #include <stdarg.h>