android.mk sdl構建錯誤

Question

我到處都在尋找有關編寫android.mk文件和“ make：*沒有規則使目標.c成為.o所需的規則” **的問題，它們都圍繞錯別字，我認為我沒有。

這是一個SDL項目，可以使用CMake構建腳本很好地構建，但是我無法讓android.mk為我工作。

這是cmake中的項目設置

CMAKE_MINIMUM_REQUIRED(VERSION 2.8)

PROJECT(blp)
#set(CMAKE_MACOSX_RPATH 1)

set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)

set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake_modules)

FIND_PACKAGE(SDL2 REQUIRED)
INCLUDE_DIRECTORIES(${SDL2_INCLUDE_DIR})

INCLUDE_DIRECTORIES("${PROJECT_SOURCE_DIR}/source/core_math")
INCLUDE_DIRECTORIES("${PROJECT_SOURCE_DIR}/source/utils/time_utils")
INCLUDE_DIRECTORIES("${PROJECT_SOURCE_DIR}/source/utils/resource_utils")
INCLUDE_DIRECTORIES("${PROJECT_SOURCE_DIR}/source/ren_opengl")
INCLUDE_DIRECTORIES("${PROJECT_SOURCE_DIR}/source/core_engine")
INCLUDE_DIRECTORIES("${PROJECT_SOURCE_DIR}/source/components/renderable2d")

INCLUDE_DIRECTORIES("${PROJECT_SOURCE_DIR}/source/glm/vec3.hpp")

FIND_PACKAGE(SDL2 REQUIRED)
INCLUDE_DIRECTORIES(${SDL2_INCLUDE_DIR})

FIND_PACKAGE(SDL2_IMAGE)
INCLUDE_DIRECTORIES(${SDL2_IMAGE_INCLUDE_DIR})

ADD_SUBDIRECTORY(source)
ADD_SUBDIRECTORY(project)

SET(SRC_FILES main.c)
SET(EXTERNAL_TARGET_LIBS ${SDL2_LIBRARY} ${SDL2_IMAGE_LIBRARY})
SET(COMPONENTS renderable2d)
SET(INTERNAL_TARGET_LIBS core_math time_utils resource_utils ren_opengl)

SET(TARGET_LIBS ${INTERNAL_TARGET_LIBS} ${EXTERNAL_TARGET_LIBS} ${COMPONENTS})

FILE(COPY ${CMAKE_CURRENT_SOURCE_DIR}/resources/ DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/bin/resources/)

在項目子文件夾中，我可以創建不同的項目並重用我創建的源動態庫。

在源代碼中，您可以看到我創建了一堆動態庫。 最后是動態庫以及一個導入所有動態庫的.h和.c類，然后我將一個.h文件導入到項目中以使用這些庫。

現在到我的android.mk文件上，它還不是很完整，但這是我遇到麻煩的地方。

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE := main

SDL_PATH := ../SDL

LOCAL_C_INCLUDES := $(LOCAL_PATH)/$(SDL_PATH)/include/
LOCAL_C_INCLUDES += $(LOCAL_PATH)/src/utils/time_utils/

# Add your application source files here...
LOCAL_SRC_FILES := $(SDL_PATH)/src/main/android/SDL_android_main.c \
                 utils/time_utils.c \
//removing the above line, core_engine.c throws an import error
//adding the above line I get the error listed at the bottom
                 core_engine/core_engine.c \
                 project.c


LOCAL_SHARED_LIBRARIES := SDL2

LOCAL_LDLIBS := -lGLESv1_CM -lGLESv2 -llog

include $(BUILD_SHARED_LIBRARY)

make: *** No rule to make target `/Users/blubee/SDL/android-project/jni/src/time_utils/time_utils.c', needed by `/Users/blubee/SDL/android-project/obj/local/armeabi/objs/main/time_utils/time_utils.o'.  Stop.

每個lib都在其自己的文件夾下，並在項目源樹中像這樣

source/components/renderable2d/renderable2d.c /.h
source/core_engine/core_engine.c /.h
source/core_math/mat4_scalar/mat4_scalar.c /.h
source/core_math/vec3_scalar/vec3_scalar.c /.h
source/..
etc...

我不確定這可能是構建版本，也可能是我在android.mk文件夾中定義源文件的順序。 有什么建議么？ 我還確保環境變量或android.mk的源文件中沒有錯別字或多余的空格

Answer 1

似乎android.mk對標頭包含順序比cmake更加敏感。

我將項目簡化為帶有#include“ SDL.h”的main.c，並且構建良好。

我將從那里開始學習android.mk，盡管它與cmake相似，但更加挑剔。