Bug 651514

Summary:	sys-devel/llvm-6.0.0 configure phase fails on ppc64 (works ok on llvm-5.0.1)
Product:	Gentoo Linux	Reporter:	ernsteiswuerfel <erhard_f>
Component:	Current packages	Assignee:	Gentoo Linux bug wranglers <bug-wranglers>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	Normal
Version:	unspecified
Hardware:	PPC64
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	emerge --info

Description ernsteiswuerfel archtester

2018-03-25 21:43:17 UTC

Created attachment 525450 [details]
emerge --info

I know llvm is not keyworded on ppc/ppc64, but it would still be nice to build llvm-6.0.0 via the regular ebuilds, as this works fine with llvm-5.0.1 too. Building 6.0.0 vanilla from source (http://llvm.org/docs/CMake.html#quick-start) works too.

I tested following combinations:
llvm-6.0.0 built w. gcc-7.3.0 / amd64           ... works!
llvm-6.0.0 built w. gcc-6.4.0 / amd64           ... works!
llvm-6.0.0 built w. gcc-7.3.0 / ppc64           ... this bug
llvm-5.0.1 built w. gcc-7.3.0 / ppc64           ... works!
llvm-6.0.0 built (vanilla) w. gcc-7.3.0 / ppc64 ... works!

Looks like an amd64-only flag "-mno-bmi" is emitted on ppc64. This does not happen with llvm-5.0.1.


-- Check for working C compiler: /usr/bin/powerpc64-unknown-linux-gnu-gcc
-- Check for working C compiler: /usr/bin/powerpc64-unknown-linux-gnu-gcc -- broken
CMake Error at /usr/share/cmake/Modules/CMakeTestCCompiler.cmake:51 (message):
  The C compiler "/usr/bin/powerpc64-unknown-linux-gnu-gcc" is not able to
  compile a simple test program.

  It fails with the following output:

   Change Dir: /var/tmp/portage/sys-devel/llvm-6.0.0/work/llvm-6.0.0.src-abi_ppc_64.ppc64/CMakeFiles/CMakeTmp

  

  Run Build Command:"/usr/bin/ninja" "cmTC_f22c6"

  [1/2] Building C object CMakeFiles/cmTC_f22c6.dir/testCCompiler.c.o

  FAILED: CMakeFiles/cmTC_f22c6.dir/testCCompiler.c.o

  /usr/bin/powerpc64-unknown-linux-gnu-gcc -DNDEBUG -O2 -pipe -mcpu=powerpc64
  -mtune=powerpc64 -mno-bmi -o CMakeFiles/cmTC_f22c6.dir/testCCompiler.c.o -c
  testCCompiler.c

  powerpc64-unknown-linux-gnu-gcc: error: unrecognized command line option
  ‘-mno-bmi’; did you mean ‘-Wno-abi’?

  ninja: build stopped: subcommand failed.

Comment 1 Arfrever Frehtes Taifersar Arahesis 2018-03-25 23:58:02 UTC


*** This bug has been marked as a duplicate of bug 650506 ***