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Can compile and link use different compilers when cross-compile?

I'd like to know if I can use different compilers for compile and link.

For example ,I have two files ,a.c and b.c, I use clang to compile a.c and b.c:

clang -c a.c -o a.o
clang -c b.c -o b.o

and then use gcc to link the two .o file as a so library:

gcc -lm -lz -shared a.o b.o -o libad.so

I generate the so file successfully,but the app will crash when using this library.

Update: More detailed information: What I have done is cross-compile , and target platform is armv7a.I use android-NDK and compile the codes on MAC.So the gcc is arm-linux-androideabi-gcc and clang is arm-linux-androideabi-clang.

Solution

  • Unless special flags are specified at link time (-fuse-ld=xxx[1][2]), both clang and gcc call the default system linker (which on macOS is lld and will probably be gold on linux). So running the second statement with either gcc or clang will produce the same linked binary.

    [1] https://gcc.gnu.org/onlinedocs/gcc/Link-Options.html

    [2] http://clang-developers.42468.n3.nabble.com/LLD-to-be-the-default-linker-in-Clang-td4053949.html