Make cmake use CC and CXX that are first in $PATH, not the ones in /usr/bin

Makefile

@@ -45,6 +45,9 @@ endif
 
 PUBHEADERS = pusherpqueue.h dcdbdaemon.h
 
+FULL_CC = $(shell which $(CC))
+FULL_CXX = $(shell which $(CXX))
+
 .PHONY : info all clean cleanall distclean check-cross-compile deps depsinstall $(SUB_DIRS)
 
 info:
@@ -128,7 +131,7 @@ $(DCDBDEPSPATH)/mosquitto-$(MOSQUITTO_VERSION)/.built: $(DCDBDEPSPATH)/mosquitto
 	@echo "Building Mosquitto library...";
 	mkdir -p $(DCDBDEPSPATH)/mosquitto_build; 
 	cd $(DCDBDEPSPATH)/mosquitto_build && \
-		cmake $(CMAKE_CROSS_FLAGS) \
+	CC=$(FULL_CC) CXX=$(FULL_CXX) cmake $(CMAKE_CROSS_FLAGS) \
 		-DOPENSSL_ROOT_DIR=$(DCDBDEPLOYPATH)/ \
 		-DWITH_SRV=no \
 		-DWITH_TLS=yes \
@@ -174,7 +177,7 @@ $(DCDBDEPSPATH)/cpp-driver-$(CPPDRV_VERSION)/.built: $(DCDBDEPSPATH)/cpp-driver-
 	@echo "Building cpp-driver..."
 	mkdir -p $(DCDBDEPSPATH)/cpp-driver_build
 	cd $(DCDBDEPSPATH)/cpp-driver_build && \
-	cmake $(CMAKE_CROSS_FLAGS) \
+	CC=$(FULL_CC) CXX=$(FULL_CXX) cmake $(CMAKE_CROSS_FLAGS) \
 		-DCMAKE_CXX_FLAGS="$(CXX11FLAGS) -Wno-unused-command-line-argument -L$(DCDBDEPLOYPATH)/lib " \
 		-DOPENSSL_ROOT_DIR=$(DCDBDEPSPATH)/openssl-$(OPENSSL_VERSION) \
 		-DLIBUV_ROOT_DIR=$(DCDBDEPSPATH)/libuv-v$(LIBUV_VERSION) \
@@ -194,7 +197,7 @@ $(DCDBDEPSPATH)/cpp-netlib-$(CPPNET_VERSION)/.built: $(DCDBDEPSPATH)/cpp-netlib-
 	@echo "Building cpp-netlib..."
 	mkdir -p $(DCDBDEPSPATH)/cpp-netlib_build
 	cd $(DCDBDEPSPATH)/cpp-netlib_build && \
-	cmake $(CMAKE_CROSS_FLAGS) \
+	CC=$(FULL_CC) CXX=$(FULL_CXX) cmake $(CMAKE_CROSS_FLAGS) \
 		-DCMAKE_CXX_FLAGS="$(CXX11FLAGS) -Wno-unused-command-line-argument -L$(DCDBDEPLOYPATH)/lib " \
 		-DCPP-NETLIB_ENABLE_HTTPS=off \
 		-DCPP-NETLIB_BUILD_TESTS=OFF \