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llvm: add dependency on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735

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LLVM uses std::shared_future, which until gcc 7.x isn't available on
architectures that don't provide lock-free atomics, see
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64735.

Buildroot already has a BR2_TOOLCHAIN_HAS_GCC_BUG_64735 option to
handle such a case, so simply add this new dependency to LLVM. It will
make sure LLVM doesn't get built on ARMv5 platforms using a gcc older
than 7.x.

Fixes:

  http://autobuild.buildroot.net/results/ada497f6a8d20fa1a9adb2b17a138d7b726a6cdc/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Acked-by: Valentin Korenblit <valentin.korenblit@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Thomas Petazzoni 2018-04-06 11:00:12 +02:00
parent 9850612ea5
commit 8f921700b7
1 changed files with 5 additions and 0 deletions
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5
package/llvm/Config.in
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@ -18,6 +18,7 @@ config BR2_PACKAGE_LLVM
depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
depends on BR2_TOOLCHAIN_HAS_THREADS
depends on BR2_INSTALL_LIBSTDCPP
depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # std::shared_future
help
The LLVM Project is a collection of modular and reusable
compiler and toolchain technologies.
@ -38,3 +39,7 @@ comment "llvm needs a toolchain w/ threads, C++, gcc >= 4.8, host gcc >= 4.8"
depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_INSTALL_LIBSTDCPP || \
!BR2_HOST_GCC_AT_LEAST_4_8 || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
comment "llvm needs a toolchain not affected by GCC bug 64735"
depends on BR2_PACKAGE_LLVM_ARCH_SUPPORTS
depends on BR2_TOOLCHAIN_HAS_GCC_BUG_64735