On 06/10/2011 09:17 AM, Barry Song wrote:
we will find many compiling error like: "break strict-aliasing rules",
"used uninitialized in this function" and so on. all those actually
are warnings which become errors due to -Werror option. A patch like
the below can make compiling pass, but we feel strange why old
toolchain has no this issue.
Hi Barry,
I also encountered that the Android code violates the C aliasing rules.
As GCC evolves it gets more strict about those errors. The fact that a
GCC 4.4 based toolchain didn't complain doesn't necessarily mean that
there were no bugs. :) As a workaround you may add -fno-strict-aliasing
to the CFLAGS (and remove -fstrict-aliasing). There is a branch called
'dev_toolchain_preview_1105' that employs these changes. On my system it
builds with the gcc-linaro-4.5-2011.05-0.
However, there are at least two knows issues:
1) The boot animation runs forever. This seems to be related to
prelinking and libgui.so. A workaround is to disable prelinking for that
module as posted at:
http://lists.linaro.org/pipermail/linaro-dev/2011-June/004993.html
2) The libaudioflinger.so segfaults. A workaround seems to build this
module with -O1.
Both issues are under investigation by the Linaro Android and Toolchain
teams.
Regards
Ken
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