use unexport instead of export to clear perforce variables

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15708 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/include/toplevel.mk b/include/toplevel.mk
index 2ee1518..78a03d8 100644 (file)
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -27,10 +27,7 @@ export LD_LIBRARY_PATH:=$(if $(LD_LIBRARY_PATH),$(LD_LIBRARY_PATH):)$(STAGING_DI
 export DYLD_LIBRARY_PATH:=$(if $(DYLD_LIBRARY_PATH),$(DYLD_LIBRARY_PATH):)$(STAGING_DIR_HOST)/lib
 
 # prevent perforce from messing with the patch utility
-export P4PORT=
-export P4USER=
-export P4CONFIG=
-export P4CLIENT=
+unexport P4PORT P4USER P4CONFIG P4CLIENT
 
 # make sure that a predefined CFLAGS variable does not disturb packages
 export CFLAGS=