libgo: Fix use of -D_GNU_SOURCE and friends when building libgo.

From-SVN: r182548

libgo/Makefile.am

@@ -37,7 +37,7 @@ AM_CPPFLAGS = -I $(srcdir)/runtime $(LIBFFIINCS) $(PTHREAD_CFLAGS)
 ACLOCAL_AMFLAGS = -I ./config -I ../config
 
 AM_CFLAGS = -fexceptions -fplan9-extensions $(SPLIT_STACK) $(WARN_CFLAGS) \
-	$(STRINGOPS_FLAG) \
+	$(STRINGOPS_FLAG) $(OSCFLAGS) \
 	-I $(srcdir)/../libgcc -I $(MULTIBUILDTOP)../../gcc/include
 
 if USING_SPLIT_STACK

libgo/Makefile.in

@@ -509,7 +509,7 @@ WARN_CFLAGS = $(WARN_FLAGS) $(WERROR)
 AM_CPPFLAGS = -I $(srcdir)/runtime $(LIBFFIINCS) $(PTHREAD_CFLAGS)
 ACLOCAL_AMFLAGS = -I ./config -I ../config
 AM_CFLAGS = -fexceptions -fplan9-extensions $(SPLIT_STACK) $(WARN_CFLAGS) \
-	$(STRINGOPS_FLAG) \
+	$(STRINGOPS_FLAG) $(OSCFLAGS) \
 	-I $(srcdir)/../libgcc -I $(MULTIBUILDTOP)../../gcc/include
 
 @USING_SPLIT_STACK_TRUE@AM_LDFLAGS = -XCClinker $(SPLIT_STACK)

libgo/configure

@@ -13804,22 +13804,23 @@ fi
 
 
 
+OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 case "$target" in
     mips-sgi-irix6.5*)
 	# IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
 	# msghdr in <sys/socket.h>.
-	OSCFLAGS='-D_XOPEN_SOURCE=500'
+	OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
 	;;
     *-*-solaris2.[89])
 	# Solaris 8/9 need this so struct msghdr gets the msg_control
 	# etc. fields in <sys/socket.h> (_XPG4_2).
-	OSCFLAGS='-D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__'
+	OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__"
 	;;
     *-*-solaris2.1[01])
 	# Solaris 10+ needs this so struct msghdr gets the msg_control
 	# etc. fields in <sys/socket.h> (_XPG4_2).  _XOPEN_SOURCE=500 as
 	# above doesn't work with C99.
-	OSCFLAGS='-D_XOPEN_SOURCE=600 -D__EXTENSIONS__'
+	OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
 	;;
 esac
 

libgo/configure.ac

@@ -277,23 +277,24 @@ AC_SUBST(GO_LIBCALL_OS_ARCH_FILE)
 AC_SUBST(GO_SYSCALL_OS_FILE)
 AC_SUBST(GO_SYSCALL_OS_ARCH_FILE)
 
-dnl Some targets need special flags to build sysinfo.go.
+dnl Special flags used to generate sysinfo.go.
+OSCFLAGS="-D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
 case "$target" in
     mips-sgi-irix6.5*)
 	# IRIX 6 needs _XOPEN_SOURCE=500 for the XPG5 version of struct
 	# msghdr in <sys/socket.h>.
-	OSCFLAGS='-D_XOPEN_SOURCE=500'
+	OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500"
 	;;
     *-*-solaris2.[[89]])
 	# Solaris 8/9 need this so struct msghdr gets the msg_control
 	# etc. fields in <sys/socket.h> (_XPG4_2).
-	OSCFLAGS='-D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__'
+	OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=500 -D_XOPEN_SOURCE_EXTENDED -D__EXTENSIONS__"
 	;;
     *-*-solaris2.1[[01]])
 	# Solaris 10+ needs this so struct msghdr gets the msg_control
 	# etc. fields in <sys/socket.h> (_XPG4_2).  _XOPEN_SOURCE=500 as
 	# above doesn't work with C99.
-	OSCFLAGS='-D_XOPEN_SOURCE=600 -D__EXTENSIONS__'
+	OSCFLAGS="$OSCFLAGS -D_XOPEN_SOURCE=600 -D__EXTENSIONS__"
 	;;
 esac
 AC_SUBST(OSCFLAGS)

libgo/go/syscall/wait.c

@@ -7,9 +7,6 @@
    We use C code to extract the wait status so that we can easily be
    OS-independent.  */
 
-#define _GNU_SOURCE
-#define __EXTENSIONS__
-
 #include <stdint.h>
 #include <sys/wait.h>
 

libgo/mksysinfo.sh

@@ -25,10 +25,6 @@ rm -f sysinfo.c
 cat > sysinfo.c <<EOF
 #include "config.h"
 
-#define _GNU_SOURCE
-#define _LARGEFILE_SOURCE
-#define _FILE_OFFSET_BITS 64
-
 #include <sys/types.h>
 #include <dirent.h>
 #include <errno.h>