522510 – =sys-devel/llvm-3.5.0 - CMake Error at /usr/share/llvm/cmake/LLVMExports.cmake:6 (set_property): set_property could not find TARGET LLVMSupport. Perhaps it has not yet been created.

Bug 522510 - =sys-devel/llvm-3.5.0 - CMake Error at /usr/share/llvm/cmake/LLVMExports.cmake:6 (set_property): set_property could not find TARGET LLVMSupport. Perhaps it has not yet been created.

Summary: =sys-devel/llvm-3.5.0 - CMake Error at /usr/share/llvm/cmake/LLVMExports.cmak...

Status:	VERIFIED FIXED

Alias:	None

Product:	Gentoo Linux
Classification:	Unclassified
Component:	[OLD] Development (show other bugs)
Hardware:	All Linux

Importance:	Normal normal (vote)
Assignee:	Bernard Cafarelli

URL:
Whiteboard:
Keywords:

Depends on:
Blocks:

Reported:	2014-09-10 14:04 UTC by David Hallas
Modified:	2014-09-16 19:27 UTC (History)
CC List:	1 user (show)

See Also:
Package list:
Runtime testing required:	---

Attachments
Patch from upstream (cleaner_fix_llvm_broken_cmake_export.patch,1.53 KB, patch) 2014-09-15 20:01 UTC, David Hallas	Details \| Diff
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Description David Hallas 2014-09-10 14:04:17 UTC

After the upgrade to llvm-3.5.0/clang-3.5.0 the installed cmake files (/usr/share/llvm/cmake/*.cmake) no longer works, I get errors like this:
CMake Error at /usr/share/llvm/cmake/LLVMExports.cmake:6 (set_property):
  set_property could not find TARGET LLVMSupport.  Perhaps it has not yet
  been created.
Call Stack (most recent call first):
  /usr/share/llvm/cmake/LLVMConfig.cmake:50 (include)
  CMakeLists.txt:5 (Find_Package)


CMake Error at /usr/share/llvm/cmake/LLVMExports.cmake:7 (set_property):
  set_property could not find TARGET LLVMMC.  Perhaps it has not yet been
  created.
Call Stack (most recent call first):
  /usr/share/llvm/cmake/LLVMConfig.cmake:50 (include)
  CMakeLists.txt:5 (Find_Package)

...

When building my clang plugin using a cmake based build system. I even tested with the sample posted on the llvm website:

http://llvm.org/releases/3.5.0/docs/CMake.html#embedding-llvm-in-your-project

and it gives the same result.

After googling I found a Debian report of the same thing:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=735592
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=749580

and it seems to be that when building llvm using the autotools based build system it doesn't correctly install all the needed cmake files, but it looks like the Debian folks solved it.

Reproducible: Always

Comment 1 David Hallas 2014-09-15 20:01:12 UTC

Upstream has a bug report (and fix): http://llvm.org/bugs/show_bug.cgi?id=20884 and applying the patch mentioned in the bug report fixes the problem for me.

Comment 2 David Hallas 2014-09-15 20:01:59 UTC

Created attachment 384806 [details, diff]
Patch from upstream

Comment 3 Bernard Cafarelli gentoo-dev

2014-09-16 14:33:13 UTC

Thanks for the report and research on this! Hopefully 3.5.1 will work out of the box :)

In the meantime I added the patch to current 3.5.0 ebuild (no revbump as it is still masked)

Comment 4 David Hallas 2014-09-16 19:27:55 UTC

Works like a charm - thanks for you support :)