[scripts] Fix CXX arg.

Author: dlyr

scripts/build.sh

@@ -194,20 +194,22 @@ if [ ! -z ${CMAKE_GENERATOR+x} ]; then
     GENERATOR_ARG="-G ${CMAKE_GENERATOR}"
 fi
 
-COMPILER_ARG=""
+COMPILER_ARG1=""
 if [ ! -z ${CC+x} ]; then
     COMPILER_ARG="-DCMAKE_C_COMPILER=${CC}"
 fi
-if [ ! -z ${CCX+x} ]; then
-    COMPILER_ARG="${COMPILER_ARG} -DCMAKE_C_COMPILER=${CXX}"
+COMPILER_ARG2=""
+if [ ! -z ${CXX+x} ]; then
+    COMPILER_ARG2="-DCMAKE_CXX_COMPILER=${CXX}"
 fi
 
 if [ "${BUILD_EXT}" = true ]; then
     echo -e "\n${GREEN}Configure externals...${NC}"
 
     eval_verbose cmake -S "${THIS_DIR}/external" -B "${EXTERNAL_BUILD_DIR}" \
                  ${GENERATOR_ARG:+"${GENERATOR_ARG}"} \
-                 ${COMPILER_ARG:+"${COMPILER_ARG}"} \
+                 ${COMPILER_ARG1:+"${COMPILER_ARG1}"} \
+                 ${COMPILER_ARG2:+"${COMPILER_ARG2}"} \
                  -DCMAKE_BUILD_TYPE="${BUILD_TYPE}" \
                  -DCMAKE_EXECUTE_PROCESS_COMMAND_ECHO=NONE \
                  -DCMAKE_INSTALL_MESSAGE=LAZY \
@@ -227,7 +229,8 @@ if [ "${BUILD_RADIUM}" = true ]; then
     eval_verbose cmake -S "${THIS_DIR}/" -B "${RADIUM_BUILD_DIR}" \
                  -DCMAKE_EXECUTE_PROCESS_COMMAND_ECHO=NONE \
                  ${GENERATOR_ARG:+"${GENERATOR_ARG}"} \
-                 ${COMPILER_ARG:+"${COMPILER_ARG}"} \
+                 ${COMPILER_ARG1:+"${COMPILER_ARG1}"} \
+                 ${COMPILER_ARG2:+"${COMPILER_ARG2}"} \
                  -DCMAKE_BUILD_TYPE="${BUILD_TYPE}" \
                  -DCMAKE_INSTALL_PREFIX="${RADIUM_INSTALL_DIR}" \
                  -C "${EXTERNAL_INSTALL_DIR}/radium-options.cmake" \