Bug 696844 – sys-devel/clang-9.0.0 - CMake Error at CMakeLists.txt:116 (include): include could not find load file: VersionFromVCS

• Status: RESOLVED FIXED
• Product: Gentoo/Alt

[Description indocomsoft 2019-10-06 11:38:19 UTC]

I am using Gentoo Prefix on Ubuntu 16.04. Installing clang fails because the CMAKEDIR used during configuration is the system LLVM instead of Gentoo Prefix's LLVM. Seems like this is because in clang-9.0.0.ebuild, -DLLVM_CONFIG is not being passed anymore. Adding it fixes this issue

Reproducible: Always

Steps to Reproduce:
emerge -atv sys-devel/clang
Actual Results:  
Configuration failed, with errors from CMake unable to read from /usr/share/llvm-3.8/cmake/ which is strange given that it is not reading the LLVM Cmake from the Gentoo Prefix

Expected Results:  
Configuration phase succeeds

[Comment 1 indocomsoft 2019-10-06 11:41:13 UTC]

I can see from https://github.com/llvm-mirror/clang/blob/master/CMakeLists.txt#L17 that LLVM_CONFIG is being deprecated. Perhaps we should pass in LLVM_CMAKE_DIR or LLVM_CMAKE_PATH instead? (Sorry, a bit unfamiliar with the CMake syntax)

[Comment 2 Jeroen Roovers (RETIRED) 2019-10-06 11:42:46 UTC]

Please attach the entire build log to this bug report.

[Comment 3 indocomsoft 2019-10-06 11:47:12 UTC]

Created attachment 591968 [details]
clang-9.0.0 reading system's llvm cmake instead of gentoo prefix's

[Comment 4 indocomsoft 2019-10-06 11:48:55 UTC]

Created attachment 591970 [details]
emerge --info '=sys-devel/clang-9.0.0::gentoo' output

[Comment 5 indocomsoft 2019-10-06 11:49:38 UTC]

Created attachment 591972 [details]
build.log

[Comment 6 indocomsoft 2019-10-06 11:51:02 UTC]

I've attached the build log and the output of emerge --info.

Note that I am using Gentoo Prefix, on Ubuntu 16.04. On the Ubuntu side, LLVM 3.8.0 is installed, while on the Gentoo Prefix side, LLVM 9.0.0 is installed

[Comment 7 Larry the Git Cow 2019-12-22 08:28:55 UTC]

The bug has been closed via the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=74becb19ba7f7c46ae22e8a1ec6270e2caeaa725

commit 74becb19ba7f7c46ae22e8a1ec6270e2caeaa725
Author:     Julius Putra Tanu Setiaji <[e-mail]>
AuthorDate: 2019-12-18 13:59:05 +0000
Commit:     Michał Górny <[e-mail]>
CommitDate: 2019-12-22 08:16:27 +0000

    sys-devel/clang: Set the correct LLVM_CMAKE_PATH on Gentoo Prefix
    
    Signed-off-by: Julius Putra Tanu Setiaji <[e-mail]>
    Closes: https://bugs.gentoo.org/696844
    Package-Manager: Portage-2.3.82, Repoman-2.3.20
    Closes: https://github.com/gentoo/gentoo/pull/14036
    Signed-off-by: Michał Górny <[e-mail]>

 sys-devel/clang/clang-10.0.0.9999.ebuild | 1 +
 sys-devel/clang/clang-9.0.1.ebuild       | 1 +
 2 files changed, 2 insertions(+)