Handong Ye via llvm-dev
2016-Feb-20 08:09 UTC
[llvm-dev] compiler-rt only builds x86 sanitizers by default
Hi All, I looked into the configure and cmake files, it seems compiler-rt only target x86 by default. It is determined by COMPILER_RT_DEFAULT_TARGET_ARCH, which is coming from host TARGET triple. Can anyone tell me why? Why not do the same as Clang is doing to build for all targets by default. Also, if I want to make it to build for all targets by default, what's the best way to change it. -- Thanks. Handong -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20160220/a747c8d9/attachment.html>
Chris Bieneman via llvm-dev
2016-Feb-22 22:30 UTC
[llvm-dev] compiler-rt only builds x86 sanitizers by default
This is a complicated problem, and it doesn’t have an easy solution. The problem is CMake generally assumes that you’re building for one target at a time, which is a safe assumption for most projects, but doesn’t work great when you’re building a cross-compiler. The correct solution to this will be to extend the LLVM_BUILD_EXTERNAL_COMPILER_RT option to take a list of target specifiers (or triples) and configure and build compiler-rt n times. I have plans to work on that support sometime hopefully in the next few months. Overhauling the LLVM_BUILD_EXTERNAL_COMPILER_RT option is basically the next logical step after I finish my work on the builtin libraries (See: http://reviews.llvm.org/D16653). -Chris> On Feb 20, 2016, at 12:09 AM, Handong Ye via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > Hi All, I looked into the configure and cmake files, it seems compiler-rt only target x86 by default. It is determined by COMPILER_RT_DEFAULT_TARGET_ARCH, which is coming from host TARGET triple. > > Can anyone tell me why? Why not do the same as Clang is doing to build for all targets by default. > > Also, if I want to make it to build for all targets by default, what's the best way to change it. > > -- > Thanks. > Handong > _______________________________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20160222/8432acce/attachment.html>