Pass CXX_FLAGS from properties to maesdk module (#1137)

Author: TedaLIEz

lib/android_build/gradle.properties

@@ -17,4 +17,6 @@ org.gradle.jvmargs=-Xmx1536m
 android.useAndroidX=true
 # Automatically convert third-party libraries to use AndroidX
 android.enableJetifier=true
+# Uncomment CXXFLAGS to set CXX flags
+# CXXFLAGS=-DHAVE_CS4=1
 

lib/android_build/maesdk/build.gradle

@@ -15,8 +15,20 @@ android {
         if(!ext.has("build_cpp_client") || ext.build_cpp_client) {
             externalNativeBuild {
                 cmake {
+                    String cxxFlag = project.findProperty("CXXFLAGS") ?: System.getenv("CXXFLAGS") ?: ""
+                    ArrayList<String> args = new ArrayList<String>()
+                    args.add("-DANDROID_STL=c++_shared")
+                    args.add("-DBUILD_SHARED_LIBS=1")
+                    args.add("-DUSE_ROOM=1")
+                    String linkerFlag = project.findProperty("CMAKE_SHARED_LINKER_FLAGS") ?: ""
+                    linkerFlag = "-DCMAKE_SHARED_LINKER_FLAGS=" + linkerFlag
+                    args.add(linkerFlag)
+                    if (!cxxFlag.isEmpty()) {
+                        args.add("-DCMAKE_CXX_FLAGS=\"" + cxxFlag + "\"")
+                    }
                     // Passes optional arguments to CMake.
-                    arguments "-DANDROID_STL=c++_shared", "-DBUILD_SHARED_LIBS=1", "-DUSE_ROOM=1", "-DCMAKE_SHARED_LINKER_FLAGS=${project.findProperty("CMAKE_SHARED_LINKER_FLAGS") ?: ''}"
+                    arguments args.toArray(new String[args.size()])
+                    println "cmake flag: " + arguments
                 }
             }
         }