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| author | Samuel Martin <s.martin49@gmail.com> | 2014-03-08 15:38:31 +0100 |
|---|---|---|
| committer | Peter Korsgaard <peter@korsgaard.com> | 2014-03-23 23:17:56 +0100 |
| commit | a1a86ebfbad1bcce471376ae74e42304553e725e (patch) | |
| tree | 7578653d579c858377413444a617f73bd7c4a6b5 /package/lttng-libust | |
| parent | 7e634a4836c5a2754cf94924baee7082efa9dd49 (diff) | |
liburcu: disable build with gcc-4.8.x on ARM
Because of a gcc bug [1], liburcu checks for compiler version [2] and
stops the build prematurely if gcc-4.8.[0-2] is detected for ARM.
However a bug fix exists [3] and may be backported by ARM toolchain
providers; that's what is done in Buildroot [4] or Linaro [5].
So, this change:
- add a patch in liburcu to allow build with ARM gcc-4.8.2;
- adds a new hidden symbol to reflect the toolchain status with regard
to this bug [1];
- and controls liburcu visibility.
However, a limitation of this is when the user is using a custom
toolchain; that's why the bug details have been added in the liburcu
help message.
[1] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854
[2] http://git.lttng.org/?p=userspace-rcu.git;a=commitdiff;h=4b79310
[3] http://gcc.gnu.org/viewcvs/gcc?view=revision&revision=204665
[4] http://git.buildroot.net/buildroot/commit/?id=c443c2be1768ebbdcb76c55d0a08fd7c983488c8
[5] http://bazaar.launchpad.net/~linaro-toolchain-dev/gcc-linaro/4.8/revision/122147
[Peter: hide normal toolchain comment if bug, add comment explaining issue if bug]
Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Diffstat (limited to 'package/lttng-libust')
| -rw-r--r-- | package/lttng-libust/Config.in | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/package/lttng-libust/Config.in b/package/lttng-libust/Config.in index 5e1a6d4c8..458338040 100644 --- a/package/lttng-libust/Config.in +++ b/package/lttng-libust/Config.in @@ -8,6 +8,7 @@ config BR2_PACKAGE_LTTNG_LIBUST depends on BR2_LARGEFILE # liburcu only works on some architectures and requires threads support" depends on BR2_arm || BR2_armeb || BR2_i386 || BR2_powerpc || BR2_x86_64 + depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_58854 # liburcu/gcc-4.8.x bug depends on BR2_TOOLCHAIN_HAS_THREADS help Userspace tracing library for the Lttng tracing @@ -20,3 +21,7 @@ config BR2_PACKAGE_LTTNG_LIBUST comment "lttng-libust needs a toolchain w/ wchar, largefile, threads" depends on BR2_arm || BR2_armeb || BR2_i386 || BR2_powerpc || BR2_x86_64 depends on !BR2_USE_WCHAR || !BR2_LARGEFILE || !BR2_TOOLCHAIN_HAS_THREADS + depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_58854 # liburcu/gcc-4.8.x bug + +comment "lttng-libust needs a toolchain not affected by GCC bug 58854" + depends on BR2_TOOLCHAIN_HAS_GCC_BUG_58854 |