yocto/meta-clang/README.md

1 …Yoe Distro CI](https://github.com/kraj/meta-clang/workflows/Yoe%20Distro%20CI/badge.svg?branch=mas…
3 # meta-clang (C/C++ frontend and LLVM compiler backend)
12 git clone git://github.com/openembedded/openembedded-core.git
13 cd openembedded-core
15 git clone git://github.com/kraj/meta-clang.git
17 $ . ./oe-init-build-env
24 git clone git://github.com/kraj/meta-clang.git
26 $ . ./oe-init-build-env
29 Add meta-clang overlay
31 bitbake-layers add-layer ../meta-clang
34 Check `conf/bblayers.conf` to see that meta-clang is added to layer mix e.g.
45 in `local.conf`, this would now switch default cross-compiler to be clang
58 compile-rt, llvm libunwind, and libc++ are used to provide C/C++ runtime, while
79 LIBCPLUSPLUS = "-stdlib=libc++"
86 LIBCPLUSPLUS:toolchain-clang:pn-<recipe> = "-stdlibc=libc++"
93 # Adding clang in generated SDK toolchain
95 Clang based cross compiler is not included into the generated SDK using `bitbake meta-toolchain` or
96 `bitbake -cpopulate_sdk <image>` if clang is expected to be part of SDK, add `CLANGSDK = "1"`
108 $ MACHINE=qemuarm bitbake core-image-full-cmdline
122 TOOLCHAIN:pn-<recipe> = "gcc"
130 CXX:remove:pn-<recipe>:toolchain-clang = " -stdlib=libc++ "
133 # compiler-rt failing in do_configure with custom TARGET_VENDOR
136 CLANG_EXTRA_OE_VENDORS, it should be done automatically, but if compiler-rt fails
137 like bellow, then check the end of work-shared/llvm-project-source-12.0.0-r0/temp/log.do_patch
140 …/OE/build/oe-core/tmp-glibc/work-shared/llvm-project-source-12.0.0-r0/git/llvm/lib/Support/Triple.…
141 …/OE/build/oe-core/tmp-glibc/work-shared/llvm-project-source-12.0.0-r0/git/clang/lib/Driver/ToolCha…
143 Read add_more_target_vendors function in recipes-devtools/clang/llvm-project-source.inc for more de…
147 -- Found assembler: TOPDIR/tmp-glibc/work/core2-64-foo-linux/compiler-rt/12.0.0-r0/recipe-sysroot-n…
148 -- Detecting C compiler ABI info
149 -- Detecting C compiler ABI info - failed
150 -- Check for working C compiler: TOPDIR/tmp-glibc/work/core2-64-foo-linux/compiler-rt/12.0.0-r0/rec…
151 -- Check for working C compiler: TOPDIR/tmp-glibc/work/core2-64-foo-linux/compiler-rt/12.0.0-r0/rec…
152 CMake Error at TOPDIR/tmp-glibc/work/core2-64-foo-linux/compiler-rt/12.0.0-r0/recipe-sysroot-native…
155 …"TOPDIR/tmp-glibc/work/core2-64-foo-linux/compiler-rt/12.0.0-r0/recipe-sysroot-native/usr/bin/x86_…
161 …Change Dir: TOPDIR/tmp-glibc/work/core2-64-foo-linux/compiler-rt/12.0.0-r0/build/CMakeFiles/CMakeT…
170 URI: git://github.com/openembedded/openembedded-core.git