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Re: [PATCH] RTEMS: Use __cxa_atexit by default for RTEMS


This is now committed.

Please double check me, Sebastian.

--joel

On 7/31/2013 2:02 AM, Sebastian Huber wrote:
Ping.

On 2013-07-08 15:29, Sebastian Huber wrote:
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.huber@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)"





--
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill@OARcorp.com        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
Support Available                (256) 722-9985


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