CMakeFile.txt通过sysroot方式后生成makefile报错

怪不得博客园干不过别家，体验真的不太好。通过openwrite发布文章，其他平台都能发布，就博客园限制了，理由是文字少的文章限制发布到该平台。

哎，这种行为当真是扶不起的阿斗。以后也不要太把博客园当回事了，迟早要关门的

报错信息如下：

-- The C compiler identification is unknown
-- The CXX compiler identification is unknown
-- Check for working C compiler: /home/xj/asm/host/bin/aarch64-buildroot-linux-gnu-gcc
-- Check for working C compiler: /home/xj/asm/host/bin/aarch64-buildroot-linux-gnu-gcc -- broken
CMake Error at /usr/share/cmake-3.10/Modules/CMakeTestCCompiler.cmake:52 (message):
	The C compiler

		"/home/xj/asm/host/bin/aarch64-buildroot-linux-gnu-gcc"

	is not able to compile a simple test program.

	It fails with the following output:

		Change Dir: /home/xj/asm/lv_mygui/S5_LVGL/CMakeFiles/CMakeTmp

		Run Build Command:"/usr/bin/make" "cmTC_ee744/fast"
		/usr/bin/make -f CMakeFiles/cmTC_ee744.dir/build.make CMakeFiles/cmTC_ee744.dir/build
		make[1]: Entering directory '/home/xj/asm/lv_mygui/S5_LVGL/CMakeFiles/CMakeTmp'
		Building C object CMakeFiles/cmTC_ee744.dir/testCCompiler.c.obj
		/home/xj/asm/host/bin/aarch64-buildroot-linux-gnu-gcc    -o CMakeFiles/cmTC_ee744.dir/testCCompiler.c.obj   -c /home/xj/asm/lv_mygui/S5_LVGL/CMakeFiles/CMakeTmp/testCCompiler.c
		/home/xj/asm/host/bin/../libexec/gcc/aarch64-buildroot-linux-gnu/10.3.0/cc1: error while loading shared libraries: libmpfr.so.4: cannot open shared object file: No such file or directory
		CMakeFiles/cmTC_ee744.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_ee744.dir/testCCompiler.c.obj' failed
		make[1]: *** [CMakeFiles/cmTC_ee744.dir/testCCompiler.c.obj] Error 1
		make[1]: Leaving directory '/home/xj/asm/lv_mygui/S5_LVGL/CMakeFiles/CMakeTmp'
		Makefile:126: recipe for target 'cmTC_ee744/fast' failed
		make: *** [cmTC_ee744/fast] Error 2




	CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
	CMakeLists.txt:18 (project)


-- Configuring incomplete, errors occurred!
See also "/home/xj/asm/lv_mygui/S5_LVGL/CMakeFiles/CMakeOutput.log".
See also "/home/xj/asm/lv_mygui/S5_LVGL/CMakeFiles/CMakeError.log".

关键信息：
'/home/xj/asm/host/bin/../libexec/gcc/aarch64-buildroot-linux-gnu/10.3.0/cc1: error while loading shared libraries: libmpfr.so.4: cannot open shared object file: No such file or directory'

搜索libmpfr.so.4发现它在

然后修改了CMakeFile.txt里的这句发现cmake 可以执行了

但是make还是报错

进入这个目录查看下具体文件信息

发现有软连接
查看连接发现

将host/lib里的此文件复制到这里来

在查看软连接发现就有了

然后再重新cmake后再make，可以正常执行了！

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