Modify the gcc configure script to allow override of the "target libc

has ssp functions built-in" test via the TARGET_LIBC_PROVIDES_SSP environment
variable, to allow us to configure a cross-compiler appropriately without
having to try to find out by looking in the target's source directory.

Tweak our build to tell gcc that the ssp bits are now in libc.

The native compiler appears to already think that the ssp bits
live in libc, so no change appears to be needed there.

The autoconf-generated configure script will be committed separately shortly.

gnu/dist/gcc4/gcc/configure.ac

@@ -3124,12 +3124,16 @@ case "$target" in
 	fi
       fi]) ;;
   *-*-netbsd*)
+    if test x$TARGET_LIBC_PROVIDES_SSP != x; then
+        gcc_cv_libc_provides_ssp=$TARGET_LIBC_PROVIDES_SSP
+    else
       if $gcc_cv_nm $($CC -print-file-name=libc.a) | \
 	grep 'B __stack_chk_guard' > /dev/null; then
 	gcc_cv_libc_provides_ssp=yes
       else
 	gcc_cv_libc_provides_ssp=no
-      fi ;;
+      fi
+    fi ;;
   *) gcc_cv_libc_provides_ssp=no ;;
 esac
 if test x$gcc_cv_libc_provides_ssp = xyes; then

tools/gcc/Makefile

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.24 2007/03/31 05:55:43 matt Exp $
+#	$NetBSD: Makefile,v 1.25 2007/06/07 08:58:58 he Exp $
 
 .include <bsd.own.mk>
 
@@ -23,6 +23,8 @@ MAKE_ARGS=	MACHINE= MAKEINFO=${TOOL_MAKEINFO:Q} \
 		EXTRA_PARTS= CPPFLAGS=-DNETBSD_TOOLS \
 		AR=${HOST_AR:Q} RANLIB=${HOST_RANLIB:Q}
 
+CONFIGURE_ENV+= TARGET_LIBC_PROVIDES_SSP=yes
+
 MKNATIVE_ENV=	${BINENV} ${CONFIGURE_ENV:NC*:NLD*} \
 			CC_FOR_BUILD=${HOST_CC:Q} \
 			CC=${CC:Q}' '${CCADDFLAGS:Q} \