a1a86ebfba
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>
28 lines
1.1 KiB
Plaintext
28 lines
1.1 KiB
Plaintext
config BR2_PACKAGE_LTTNG_LIBUST
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bool "lttng-libust"
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select BR2_PACKAGE_LIBURCU
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select BR2_PACKAGE_UTIL_LINUX
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select BR2_PACKAGE_UTIL_LINUX_LIBUUID
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# util-linux needs wchar and largefile
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depends on BR2_USE_WCHAR
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depends on BR2_LARGEFILE
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# liburcu only works on some architectures and requires threads support"
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depends on BR2_arm || BR2_armeb || BR2_i386 || BR2_powerpc || BR2_x86_64
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depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_58854 # liburcu/gcc-4.8.x bug
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depends on BR2_TOOLCHAIN_HAS_THREADS
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help
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Userspace tracing library for the Lttng tracing
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infrastructure. It allows userspace programs to create
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custom trace events that are integrated with all other
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events gathered by LTTng.
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http://lttng.org
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comment "lttng-libust needs a toolchain w/ wchar, largefile, threads"
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depends on BR2_arm || BR2_armeb || BR2_i386 || BR2_powerpc || BR2_x86_64
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depends on !BR2_USE_WCHAR || !BR2_LARGEFILE || !BR2_TOOLCHAIN_HAS_THREADS
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depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_58854 # liburcu/gcc-4.8.x bug
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comment "lttng-libust needs a toolchain not affected by GCC bug 58854"
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depends on BR2_TOOLCHAIN_HAS_GCC_BUG_58854
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