Hi Kumar, The background of this commit is, when I upgraded PowerPC gcc to 4.5, tinylogin would crash with certain GCC build parameters.
The root cause for that bug is, if enabled both "-frename-registers" and "-Os" options to build tinylogin in powerpc architecture, the tinylogin/getty application will encounter segmentation fault. Other combinations like "-frename-registers and -O2" or only "-Os" will not trigger this issue. Poky cross environment provides the "-frename-registers" parameter, however it does not provide -Os option since "--enable-target-optspace" option is disabled for powerpc gcc. The "-Os" option in tinylogin is added by its own Makefile. This commit is to prevent the above case. If --enable-target-optspace is disabled for GCC, "-Os" should not be added by recipe. Thanks, Dongxiao > -----Original Message----- > From: Kumar Gala [mailto:ga...@kernel.crashing.org] > Sent: Wednesday, August 24, 2011 8:53 AM > To: Xu, Dongxiao > Cc: Patches and discussions about the oe-core layer; Khem Raj > Subject: why do we poison -Os? > > Dongxiao, > > Can you explain why this was needed: > > commit ce456306dad3fdf42494830011dacae213c48edf > Author: Dongxiao Xu <dongxiao...@intel.com> > Date: Sat Sep 25 10:16:26 2010 +0800 > > gcc: enable poison parameters detection > > If not configured with --enable-target-optspace, gcc will report > errors if there is '-Os' optimization in parameters. > > This fixes [BUGID #342] > > Also add "--enable-target-optspace" option to arm gcc configuration. > > Signed-off-by: Dongxiao Xu <dongxiao...@intel.com> > > > - k _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
