add better working-g++ check (patch from #2017)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8118 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/include/prereq-build.mk b/include/prereq-build.mk
index 6311e601ba46410bad706961fdac380adc12d81d..c31020c3211d528acca14d8d4a1a233652dfb1d6 100644 (file)
--- a/include/prereq-build.mk
+++ b/include/prereq-build.mk
@@ -52,7 +52,8 @@ $(eval $(call Require,working-gcc, \
 
 define Require/working-g++
        echo 'int main(int argc, char **argv) { return 0; }' | \
-               g++ -x c++ -o $(TMP_DIR)/a.out -lstdc++ -
+               g++ -x c++ -o $(TMP_DIR)/a.out -lstdc++ - && \
+               $(TMP_DIR)/a.out
 endef
 
 $(eval $(call Require,working-g++, \