+define Require/libssl
+ echo 'int main(int argc, char **argv) { SSL_library_init(); return 0; }' | \
+ gcc -include openssl/ssl.h -x c -o $(TMP_DIR)/a.out - -lcrypto -lssl
+endef
+
+$(eval $(call Require,libssl, \
+ Please install the openssl library (with development headers) \
+))
+