1RUN: lld-link -lldmingw %S/Inputs/gnu-weak.o %S/Inputs/gnu-weak2.o -out:%t.exe 2 3GNU ld can handle several definitions of the same weak symbol, and 4unless there is a strong definition of it, it just picks the first 5weak definition encountered. 6 7For each of the weak definitions, GNU tools produce a regular symbol 8named .weak.<weaksymbol>.<othersymbol>, where the other symbol name is 9another symbol defined close by. 10 11This can't be reproduced by assembling with llvm-mc, as llvm-mc always 12produces similar regular symbols named .weak.<weaksymbol>.default. 13 14The bundled object files can be produced from test code that looks like 15this: 16 17$ cat gnu-weak.c 18void weakfunc(void) __attribute__((weak)); 19void otherfunc(void); 20 21__attribute__((weak)) void weakfunc() { 22} 23 24int main(int argc, char* argv[]) { 25 otherfunc(); 26 weakfunc(); 27 return 0; 28} 29void mainCRTStartup(void) { 30 main(0, (char**)0); 31} 32void __main(void) { 33} 34 35$ cat gnu-weak2.c 36void weakfunc(void) __attribute__((weak)); 37 38__attribute__((weak)) void weakfunc() { 39} 40 41void otherfunc(void) { 42} 43 44$ x86_64-w64-mingw32-gcc -c -O2 gnu-weak.c 45$ x86_64-w64-mingw32-gcc -c -O2 gnu-weak2.c 46 47$ x86_64-w64-mingw32-nm gnu-weak.o | grep weakfunc 480000000000000000 T .weak.weakfunc.main 49 w weakfunc 50$ x86_64-w64-mingw32-nm gnu-weak2.o | grep weakfunc 510000000000000000 T .weak.weakfunc.otherfunc 52 w weakfunc 53