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Bug 502318 - sys-devel/llvm: pass --with-c-include-dirs on prefix
Summary: sys-devel/llvm: pass --with-c-include-dirs on prefix
Status: CONFIRMED
Alias: None
Product: Gentoo/Alt
Classification: Unclassified
Component: Prefix Support (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Prefix
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-02-24 04:50 UTC by William Throwe
Modified: 2018-03-13 17:33 UTC (History)
0 users

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Runtime testing required: ---


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Description William Throwe 2014-02-24 04:50:37 UTC
Before the llvm and clang packages were combined, the clang ebuild had:


# Setup the search path to include the Prefix includes                      
if use prefix ; then
    CONF_FLAGS="${CONF_FLAGS} \                                             
        --with-c-include-dirs=${EPREFIX}/usr/include:/usr/include"
fi


This flag never made it into the new llvm ebuild, so clang fails to find header files on prefix.
Comment 1 Fabian Groffen gentoo-dev 2015-08-11 19:17:41 UTC
I think this refers to the situation before Darwin switched primary toolchain to Clang.
Comment 2 William Throwe 2015-09-21 03:37:21 UTC
This is still broken with sys-devel/llvm-3.7.0-r1

$ cat bar.c
#include <gmp.h>
$ gcc bar.c -fsyntax-only
$ clang bar.c -fsyntax-only
bar.c:1:10: fatal error: 'gmp.h' file not found
#include <gmp.h>
         ^
1 error generated.
$ ls ${EPREFIX}/usr/include/gmp.h
/home/supernova/wthrowe/gentoo/usr/include/gmp.h
Comment 3 Fabian Groffen gentoo-dev 2016-01-09 19:11:55 UTC
It could be that due to darwin_prefix-include-paths.patch this works on Darwin, but not on other Prefix platforms.
Comment 4 Fabian Groffen gentoo-dev 2018-02-01 09:06:02 UTC
the with-c-include-dirs equivalent in cmake setup is unknown, so I figure we need a fix like for Darwin.
Comment 5 Guilherme Amadio gentoo-dev 2018-03-13 16:31:36 UTC
(In reply to Fabian Groffen from comment #4)
> the with-c-include-dirs equivalent in cmake setup is unknown, so I figure we
> need a fix like for Darwin.

There is a -DC_INCLUDE_DIRS flag, but adding it in the clang ebuild didn't work for me. Maybe the Darwin fix will be needed in all prefix variants.
Comment 6 Fabian Groffen gentoo-dev 2018-03-13 17:33:30 UTC
should it be in clang or llvm? I'm not sure on that.