android-ndk - 使用cmake构建工具链以针对Android进行交叉编译

Question

gcc (GCC) 4.8.1 
android-ndk-r9 

你好，

我的主机是 Fedora 19，我想创建一个工具链来编译要在android上运行的程序，稍后我想将其扩展到iOS。

我收到以下错误：

Check for working C compiler: /opt/ndk/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc -- broken

由于所有内容均已安装，因此我不确定为什么会出现此错误。我还安装了 binutils-arm-linux-gnu。但是，这是我第一次做这种事情，所以很多人都把事情弄混了。

我正在尝试使用cmake创建工具链文件以croos-compile在android设备上运行库。

我已经在以下位置安装了android-ndk-r9并带有编译器的路径：

/opt/ndk/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin

arm-linux-androideabi-addr2line
arm-linux-androideabi-ar
arm-linux-androideabi-as
arm-linux-androideabi-c++
arm-linux-androideabi-c++filt
arm-linux-androideabi-cpp
arm-linux-androideabi-elfedit
arm-linux-androideabi-g++
arm-linux-androideabi-gcc
arm-linux-androideabi-gcc-4.8
arm-linux-androideabi-gcc-ar
arm-linux-androideabi-gcc-nm
arm-linux-androideabi-gcc-ranlib
arm-linux-androideabi-gcov
arm-linux-androideabi-gdb
arm-linux-androideabi-gprof
arm-linux-androideabi-ld
arm-linux-androideabi-ld.bfd
arm-linux-androideabi-ld.gold
arm-linux-androideabi-ld.mcld
arm-linux-androideabi-nm
arm-linux-androideabi-objcopy
arm-linux-androideabi-objdump
arm-linux-androideabi-ranlib
arm-linux-androideabi-readelf
arm-linux-androideabi-run
arm-linux-androideabi-size
arm-linux-androideabi-strings
arm-linux-androideabi-strip

我的交叉编译文件是：

include(CMakeForceCompiler)

set(toolchain_path /opt/ndk/toolchains)

# Target system
set(CMAKE_SYSTEM_NAME Linux)

set(CMAKE_SYSTEM_PROCESSOR arm)

set(CMAKE_SYSTEM_VERSION 1)

# Compiler to build for the target
set(CMAKE_C_COMPILER /opt/ndk/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc)

set(CMAKE_FIND_ROOT_PATH /opt/ndk/toolchains)

我从build / debug目录运行此文件，工具链位于根目录中。

[ant@localhost debug]$ cmake -DCMAKE_TOOLCHAIN_FILE=arm-eabi-gcc.cmake ../..

输出量

-- The C compiler identification is GNU 4.8.0
-- Check for working C compiler: /opt/ndk/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
-- Check for working C compiler: /opt/ndk/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc -- broken
CMake Error at /usr/share/cmake/Modules/CMakeTestCCompiler.cmake:61 (message):
  The C compiler
  "/opt/ndk/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc"
  is not able to compile a simple test program.

  It fails with the following output:

   Change Dir: /home/steve/mobile_progs/linux_pjsip/build/debug/CMakeFiles/CMakeTmp

  Run Build Command:/usr/bin/gmake "cmTryCompileExec379796592/fast"

  /usr/bin/gmake -f CMakeFiles/cmTryCompileExec379796592.dir/build.make
  CMakeFiles/cmTryCompileExec379796592.dir/build

  gmake[1]: Entering directory
  `/home/steve/mobile_progs/linux_pjsip/build/debug/CMakeFiles/CMakeTmp'

  /usr/bin/cmake -E cmake_progress_report
  /home/steve/mobile_progs/linux_pjsip/build/debug/CMakeFiles/CMakeTmp/CMakeFiles
  1

  Building C object
  CMakeFiles/cmTryCompileExec379796592.dir/testCCompiler.c.o

  /opt/ndk/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
  -o CMakeFiles/cmTryCompileExec379796592.dir/testCCompiler.c.o -c
  /home/steve/mobile_progs/linux_pjsip/build/debug/CMakeFiles/CMakeTmp/testCCompiler.c

  Linking C executable cmTryCompileExec379796592

  /usr/bin/cmake -E cmake_link_script
  CMakeFiles/cmTryCompileExec379796592.dir/link.txt --verbose=1

  /opt/ndk/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
  CMakeFiles/cmTryCompileExec379796592.dir/testCCompiler.c.o -o
  cmTryCompileExec379796592 -rdynamic 

  /opt/android-ndk-r9/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld:
  error: cannot open crtbegin_dynamic.o: No such file or directory


  /opt/android-ndk-r9/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld:
  error: cannot open crtend_android.o: No such file or directory

  /opt/android-ndk-r9/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld:
  error: cannot find -lc

  /opt/android-ndk-r9/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.8/../../../../arm-linux-androideabi/bin/ld:
  error: cannot find -ldl

  collect2: error: ld returned 1 exit status

  gmake[1]: *** [cmTryCompileExec379796592] Error 1

  gmake[1]: Leaving directory
  `/home/steve/mobile_progs/linux_pjsip/build/debug/CMakeFiles/CMakeTmp'

  gmake: *** [cmTryCompileExec379796592/fast] Error 2

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:4 (project)

提前谢谢了，

Answer 1

我设法通过首先访问以下网站解决了这个问题：

http://developer.android.com/tools/sdk/ndk/index.html

有一个使用NDK随附的独立工具链的示例。

make-standalone-toolchain.sh --toolchain=arm-linux-androideabi-4.8

将提取到我的/ opt目录中。

并使用此示例工具链cmake文件

# Target system
set(CMAKE_SYSTEM_NAME  Android)

set(CMAKE_SYSTEM_VERSION 1)

# Compiler to build for the target
set(CMAKE_C_COMPILER /opt/arm-linux-androideabi-4.8/bin/arm-linux-androideabi-gcc)
set(CMAKE_CXX_COMPILER /opt/arm-linux-androideabi-4.8/bin/arm-linux-androideabi-g++)

在那之后一切都工作了。但是，我无法解决以前的问题。也许我将一些环境变量设置为错误的路径。

希望这对其他人有帮助。