[Bug target/54908] misc regressions on emutls targets remain from dynamic initialization of non-function-local TLS variables

[howarth at nitro dot med.uc.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54908



--- Comment #10 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-10-16 
15:50:45 UTC ---

Note that the fix in comment 9 for libgomp/testsuite/libgomp.c++/pr24455.C

works for Xcode 3.2.6 and earlier on darwin10 but not Xcode 4.2. This is

because Apple broke weak symbol lookup in Xcode 4.2's linker (radr://10466868,

"-undefined dynamic_lookup linker bug"). This issue wasn't fixed until Xcode

4.4 (which is only available on darwin11 and darwin12). 



Note that a simple testcase for this bug is...



--------------- weak.c ---------------------

#include <stdio.h>



char *myweakfunc(void) __attribute__((weak)) ;



int main(int argc, char **argv)

{

  if (myweakfunc)

    printf ("found myweakfunc %s\n", myweakfunc());

  else

    printf("Weak func not found\n");

  return 0;

}

--------------------------------------------



% gcc weak.c -o wk -undefined dynamic_lookup

% ./wk

Weak func not found