Issue 6207 - Add option to configure build output directory

Makefile

 V8_DIR :=$(shell pwd -L)/third_party/v8/
 HOST_ARCH :=$(shell python third_party/detect_v8_host_arch.py)
 
 GYP_PARAMETERS=host_arch=${HOST_ARCH}
 
 ifndef HOST_OS
   raw_OS = $(shell uname -s)
   ifeq (${raw_OS},Linux)
     HOST_OS=linux
   else ifeq (${raw_OS},Darwin)
     HOST_OS=mac
   endif
 endif
 
+ifndef BUILD_DIR
+  BUILD_DIR=$(shell pwd -L)/build
+endif
+
 ifneq "$(and ${LIBV8_LIB_DIR}, ${LIBV8_INCLUDE_DIR})" ""
 BUILD_V8=do-nothing
 ABP_GYP_PARAMETERS+= libv8_lib_dir=${LIBV8_LIB_DIR} libv8_include_dir=${LIBV8_INCLUDE_DIR}
 else
 BUILD_V8=build-v8
 endif
 
 ifneq ($(ANDROID_ARCH),)
 ANDROID_PLATFORM_LEVEL=android-9
 GYP_PARAMETERS+= OS=android target_arch=${ANDROID_ARCH}
@@ skipping 17 matching lines @@
 
 else # if ${ANDROID_ARCH} is empty
 TARGET_ARCH=${HOST_ARCH}
 ifdef ARCH
 TARGET_ARCH=${ARCH}
 endif
 GYP_PARAMETERS+= OS=${HOST_OS} target_arch=${TARGET_ARCH}
 endif
 
 
-TEST_EXECUTABLE = build/out/Debug/tests
+TEST_EXECUTABLE = ${BUILD_DIR}/out/Debug/tests
 
 .PHONY: do-nothing all test clean docs build-v8 build-v8-android v8_android_multi android_multi android_x86 \
         android_arm ensure_dependencies
 
 .DEFAULT_GOAL:=all
 
 do-nothing:
 
 ensure_dependencies:
         python ensure_dependencies.py
 
 build-v8: ensure_dependencies
-        GYP_DEFINES="${GYP_PARAMETERS}" third_party/gyp/gyp --depth=. -f make -I build-v8.gypi --generator-output=build/v8 ${V8_DIR}src/v8.gyp
-        make -C build/v8 v8_snapshot v8_libplatform v8_libsampler
+        GYP_DEFINES="${GYP_PARAMETERS}" third_party/gyp/gyp --depth=. -f make -I build-v8.gypi --generator-output=${BUILD_DIR}/v8 ${V8_DIR}src/v8.gyp
+        make -C ${BUILD_DIR}/v8 v8_snapshot v8_libplatform v8_libsampler
 
 all: ${BUILD_V8} ensure_dependencies 
-        GYP_DEFINES="${GYP_PARAMETERS} ${ABP_GYP_PARAMETERS}" third_party/gyp/gyp --depth=. -f make -I libadblockplus.gypi --generator-output=build libadblockplus.gyp
-        $(MAKE) -C build
+        GYP_DEFINES="${GYP_PARAMETERS} ${ABP_GYP_PARAMETERS}" third_party/gyp/gyp --depth=. -f make -I libadblockplus.gypi --generator-output=${BUILD_DIR} libadblockplus.gyp
+        $(MAKE) -C ${BUILD_DIR}
 
 test: all
 ifdef FILTER
         $(TEST_EXECUTABLE) --gtest_filter=$(FILTER)
 else
         $(TEST_EXECUTABLE)
 endif
 
 docs:
         doxygen
 
 clean:
-        $(RM) -r build docs
+        $(RM) -r ${BUILD_DIR} docs
 
 android_x86:
         ANDROID_ARCH="ia32" $(MAKE) android_multi
 
 android_arm:
         ANDROID_ARCH="arm" $(MAKE) android_multi
 
 android_arm64:
         ANDROID_ARCH="arm64" $(MAKE) android_multi
 
 ifneq ($(ANDROID_ARCH),)
 v8_android_multi: ensure_dependencies
         cd third_party/v8 && GYP_GENERATORS=make-android \
           GYP_DEFINES="${GYP_PARAMETERS} v8_target_arch=${ANDROID_ARCH}" \
           PYTHONPATH="${V8_DIR}tools/generate_shim_headers:${V8_DIR}gypfiles:${PYTHONPATH}" \
           python ../../make_gyp_wrapper.py \
-            --generator-output=../../build src/v8.gyp \
+            --generator-output=${BUILD_DIR} src/v8.gyp \
             -Igypfiles/standalone.gypi \
             --depth=. \
             -S.android_${ANDROID_ARCH}.release \
             -I../../android-v8-options.gypi
         cd third_party/v8 && make \
-          -C ../../build \
+          -C ${BUILD_DIR} \
           -f Makefile.android_${ANDROID_ARCH}.release \
           v8_snapshot v8_libplatform v8_libsampler \
           BUILDTYPE=Release \
-          builddir=${V8_DIR}../../build/android_${ANDROID_ARCH}.release
+          builddir=${BUILD_DIR}/android_${ANDROID_ARCH}.release
 
 v8_android_multi_linux_${ANDROID_ARCH}: v8_android_multi
 
 v8_android_multi_mac_ia32: v8_android_multi
-        find build/android_ia32.release/ -depth 1 -iname \*.a -exec ${ANDROID_NDK_ROOT}/toolchains/x86-4.9/prebuilt/darwin-x86_64/bin/i686-linux-android-ranlib {} \;
+        find ${BUILD_DIR}/android_ia32.release/ -depth 1 -iname \*.a -exec ${ANDROID_NDK_ROOT}/toolchains/x86-4.9/prebuilt/darwin-x86_64/bin/i686-linux-android-ranlib {} \;
 
 v8_android_multi_mac_arm: v8_android_multi
-        find build/android_arm.release/ -depth 1 -iname \*.a -exec ${ANDROID_NDK_ROOT}/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-ranlib {} \;
+        find ${BUILD_DIR}/android_arm.release/ -depth 1 -iname \*.a -exec ${ANDROID_NDK_ROOT}/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-ranlib {} \;
 
 v8_android_multi_mac_arm64: v8_android_multi
-        find build/android_arm64.release/ -depth 1 -iname \*.a -exec ${ANDROID_NDK_ROOT}/toolchains/aarch64-linux-android-4.9/prebuilt/darwin-x86_64/bin/aarch64-linux-android-ranlib {} \;
+        find ${BUILD_DIR}/android_arm64.release/ -depth 1 -iname \*.a -exec ${ANDROID_NDK_ROOT}/toolchains/aarch64-linux-android-4.9/prebuilt/darwin-x86_64/bin/aarch64-linux-android-ranlib {} \;
 
 build-v8-android: v8_android_multi_${HOST_OS}_${ANDROID_ARCH}
 
 android_multi: ${BUILD_V8} ensure_dependencies
         GYP_DEFINES="${GYP_PARAMETERS} ${ABP_GYP_PARAMETERS}" \
-        python ./make_gyp_wrapper.py --depth=. -f make-android -Ilibadblockplus.gypi --generator-output=build -Gandroid_ndk_version=r12b libadblockplus.gyp
-        $(ANDROID_NDK_ROOT)/ndk-build -C build installed_modules \
+        python ./make_gyp_wrapper.py --depth=. -f make-android -Ilibadblockplus.gypi --generator-output=${BUILD_DIR} -Gandroid_ndk_version=r12b libadblockplus.gyp
+        $(ANDROID_NDK_ROOT)/ndk-build -C ${BUILD_DIR} installed_modules \
         BUILDTYPE=Release \
         APP_ABI=$(ANDROID_ABI) \
         APP_PLATFORM=${ANDROID_PLATFORM_LEVEL} \
         APP_PIE=true \
         APP_STL=c++_static \
         APP_BUILD_SCRIPT=Makefile \
         NDK_PROJECT_PATH=. \
         NDK_OUT=. \
         NDK_APP_DST_DIR=$(ANDROID_DEST_DIR)
 endif