[OE-core] [PATCH V2] llvm: fix link error for powerpc

[ChenQi]

I'm recently getting llvm build failure on qemuppc. After reverting this 
patch, the build succeeds.
My host is ubuntu16.04.

I'm also wondering why autobuilder does not detect the build failure. No 
world build for qemuppc?

Best Regards,
Chen Qi

On 04/02/2019 08:43 AM, changqing.li at windriver.com wrote:
> From: Changqing Li <changqing.li at windriver.com>
>
> fix below link error for powerpc
>
> lib/libLLVMSupport.a(CommandLine.cpp.o): in function `llvm::cl::opt_storage<(anonymous namespace):
> :HelpPrinterWrapper, true, true>::setLocation(llvm::cl::Option&, (anonymous namespace)::HelpPrinterWrapper&) [clone .isra.189]':
> /usr/src/debug/llvm/8.0-r0/git/llvm/include/llvm/Support/CommandLine.h:1218:(.text.startup+0x5c):
> relocation truncated to fit: R_PPC_PLTREL24 against symbol `llvm::errs()' defined in .text section in lib/libLLVMSupport.a(raw_ostream.cpp.o)+8000
> lib/libLLVMSupport.a(CommandLine.cpp.o): in function `setLocation':
>
> Signed-off-by: Changqing Li <changqing.li at windriver.com>
> ---
>   meta/recipes-devtools/llvm/llvm_git.bb | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/meta/recipes-devtools/llvm/llvm_git.bb b/meta/recipes-devtools/llvm/llvm_git.bb
> index d2ea927..a35ea4a 100644
> --- a/meta/recipes-devtools/llvm/llvm_git.bb
> +++ b/meta/recipes-devtools/llvm/llvm_git.bb
> @@ -88,6 +88,8 @@ EXTRA_OECMAKE_append_class-nativesdk = "\
>                     -DLLVM_CONFIG_PATH=${STAGING_BINDIR_NATIVE}/llvm-config${PV} \
>                    "
>   
> +CXXFLAGS_append_class-target_powerpc = " -mlongcall"
> +
>   do_configure_prepend() {
>   # Fix paths in llvm-config
>   	sed -i "s|sys::path::parent_path(CurrentPath))\.str()|sys::path::parent_path(sys::path::parent_path(CurrentPath))).str()|g" ${S}/tools/llvm-config/llvm-config.cpp