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richfelker / musl-cross-make

Simple makefile-based build for musl cross compiler
MIT License
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I wrote a hello world applet, but it can't run #152

Closed skychengzhixing closed 2 years ago

skychengzhixing commented 2 years ago

hi，friend： I wrote a hello world applet, but it can't run； I generated a hello world applet from GCC in the cross tool chain compiled by myself, but it failed to run. The specific errors are as follows: The steps are as follows: （1）x86_64-linux-musl-gcc 11.c -o main （2）./main Errors are reported as follows:

  1. Execute the following command ： ./main Error reporting： -bash: ./main: No such file or directory
  2. Use the following command to view the dependent dynamic libraries: ldd main Error reporting：./main: error while loading shared libraries: /lib64/libc.so: invalid ELF header my host： Use this command to view my hosts ：uname -m result：x86_64

I tried some methods, but the problem still hasn't been solved. Can you help me see what caused the problem?

rofl0r commented 2 years ago

bash: ./main: No such file or directory

clear indication that the dynamic link interpreter isn't in the expected path.

check readelf -a main | grep -i interp to see the expected path.

you need to either install the musl dynlinker to that location, or run path/to/musl-cross-install/lib/libc.so main. alternatively you can static link your binary. the reason the dynlinker isnt installed to your system /lib is because mcm is a cross-compiler intended to compile binaries for other systems (which have the proper filesystem layout), and since it would require additional privileges.

skychengzhixing commented 2 years ago

Thank you for your reply. According to your method, both the static link method and the dynamic link method can make the program run. I record my method. If other people encounter similar problems, you can refer to the following:

  1. static link library: running: x86_ 64 Linux musl CC -static 11 C -o Jing
  2. dynlinker ：### readelf -a main | grep -i interp ### to see the expected path，result：[Requesting program interpreter: /lib/ld-musl-x86_64.so.1]. Run the LS -al command to check whether the current library has a soft connection?
  3. Finally, copy the required library to the corresponding directory. My copy library commands are: sudo cp -r libc.so /usr/lib sudo cp -r ld-musl-x86_64.so.1 /usr/lib Good wishes！