On Thu, Mar 9, 2017 at 1:32 PM, Martin Kelly <[email protected]> wrote: > On 03/09/2017 01:06 PM, Khem Raj wrote: >> >> On Fri, Mar 3, 2017 at 12:09 PM, Khem Raj <[email protected]> wrote: >>> >>> >>> meta-clang has only provided static compiler thus far, so using shared >>> or static did not matter as much in fact it could be helping with >>> faster compile >>> times that we see with clang. However, there is no binding to keep it >>> static >>> link. Feel free to send a pull request to change it. >> >> >> I did try this and I see a considerable slowdown in compiler speed. I >> changed >> two things at a time so may be its the other >> >> diff --git a/recipes-devtools/clang/clang_git.bb >> b/recipes-devtools/clang/clang_git.bb >> index 6c6e66a..7de2be1 100644 >> --- a/recipes-devtools/clang/clang_git.bb >> +++ b/recipes-devtools/clang/clang_git.bb >> @@ -73,7 +73,8 @@ EXTRA_OECMAKE_append_class-nativesdk = "\ >> -DCLANG_TABLEGEN=${STAGING_BINDIR_NATIVE}/clang-tblgen \ >> " >> EXTRA_OECMAKE_append_class-target = "\ >> - -DLLVM_ENABLE_PIC=False \ >> + -DBUILD_SHARED_LIBS=ON \ >> + -DLLVM_ENABLE_PIC=ON \ >> -DLLVM_TABLEGEN=${STAGING_BINDIR_NATIVE}/llvm-tblgen \ >> -DCLANG_TABLEGEN=${STAGING_BINDIR_NATIVE}/clang-tblgen \ >> -DLLVM_TARGETS_TO_BUILD=${@get_clang_target_arch(bb, d)} \ >> >>> > > Those are the exact changes I have been testing with; -DLLVM_ENABLE_PIC=ON > is certainly necessary to prevent QA errors regarding text relocation, so > you can't really make the changes in isolation. That said, the change is > still very useful, as there are some programs that use only shared > libLLVM.so, and without them you can't really use them with bitbake. >
slow down is 6x when using clang to compile on target, I dont know if such a patch would be a good thing from compiler pov. > I hope to have a pull request for you soon once I iron out the rest of the > issues. -- _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
