The __cxa_atexit support is a reqirement for destructor registration of thread-local objects.
For *-*-elf it is already enabled by default. See comment line 810 in "gcc/config.gcc". Define TARGET_LIBGCC_SDATA_SECTION on PowerPC for RTEMS to ".sdata" to place the __dso_handle. The __dso_handle is referenced by application code. In case this code uses the small data section, the __dso_handle must be there. This patch should be committed to GCC 4.8 and 4.9. Test results: http://gcc.gnu.org/ml/gcc-testresults/2013-07/msg00671.html gcc/ChangeLog 2013-07-08 Sebastian Huber <sebastian.hu...@embedded-brains.de> * config.gcc (*-*-rtems*): Use __cxa_atexit by default. * config/rs6000/rtems.h (TARGET_LIBGCC_SDATA_SECTION): Define. --- gcc/config.gcc | 1 + gcc/config/rs6000/rtems.h | 3 +++ 2 files changed, 4 insertions(+), 0 deletions(-) diff --git a/gcc/config.gcc b/gcc/config.gcc index a927964..1648dfe 100644 --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -734,6 +734,7 @@ case ${target} in yes) thread_file='rtems' ;; esac extra_options="${extra_options} rtems.opt" + default_use_cxa_atexit=yes use_gcc_stdint=wrap ;; *-*-uclinux*) diff --git a/gcc/config/rs6000/rtems.h b/gcc/config/rs6000/rtems.h index b910b5e..fb22be1 100644 --- a/gcc/config/rs6000/rtems.h +++ b/gcc/config/rs6000/rtems.h @@ -34,6 +34,9 @@ } \ while (0) +#undef TARGET_LIBGCC_SDATA_SECTION +#define TARGET_LIBGCC_SDATA_SECTION ".sdata" + #undef CPP_OS_DEFAULT_SPEC #define CPP_OS_DEFAULT_SPEC "%(cpp_os_rtems)" -- 1.7.7
