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Summary:
This commit moves the logic for determining system, resource and C++
header search paths from CC1 to the driver. This refactor has already
been made for several platforms, but Darwin had been left behind.
This refactor tries to implement the previous search path logic with
perfect accuracy. In particular, the order of all include paths inside
CC1 and all paths that were skipped because nonexistent are conserved
after the refactor. This change was also tested against a code base
of significant size and revealed no problems.
Reviewers: jfb, arphaman
Subscribers: nemanjai, javed.absar, kbarton, christof, jkorous, dexonsmith, jsji, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D61963
llvm-svn: 361278
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Summary:
By using '..' instead of fs::parent_path.
The intention of the code was to go from 'path/to/clang/bin' to
'path/to/clang/include'. In most cases parent_path works, however it
would fail when clang is run as './clang'.
This was noticed in Chromium's bug tracker, see
https://bugs.chromium.org/p/chromium/issues/detail?id=919761
Reviewers: arphaman, thakis, EricWF
Reviewed By: arphaman, thakis
Subscribers: christof, cfe-commits
Differential Revision: https://reviews.llvm.org/D56446
llvm-svn: 350714
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llvm-svn: 348425
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Summary:
The intention is to make the tools replaying compilations from 'compile_commands.json'
(clang-tidy, clangd, etc.) find the same standard library as the original compiler
specified in 'compile_commands.json'.
Previously, the library detection logic was in the frontend (InitHeaderSearch.cpp) and relied
on the value of resource dir as an approximation of the compiler install dir. The new logic
uses the actual compiler install dir and is performed in the driver. This is consistent with
the C++ standard library detection on other platforms and allows to override the resource dir
in the tools using the compile_commands.json without altering the
standard library detection mechanism. The tools have to override the resource dir to make sure
they use a consistent version of the builtin headers.
There is still logic in InitHeaderSearch that attemps to add the absolute includes for the
the C++ standard library, so we keep passing the -stdlib=libc++ from the driver to the frontend
via cc1 args to avoid breaking that. In the long run, we should move this logic to the driver too,
but it could potentially break the library detection on other systems, so we don't tackle it in this
patch to keep its scope manageable.
This is a second attempt to fix the issue, first one was commited in r346652 and reverted in r346675.
The original fix relied on an ad-hoc propagation (bypassing the cc1 flags) of the install dir from the
driver to the frontend's HeaderSearchOptions. Unsurpisingly, the propagation was incomplete, it broke
the libc++ detection in clang itself, which caused LLDB tests to break.
The LLDB tests pass with new fix.
Reviewers: JDevlieghere, arphaman, EricWF
Reviewed By: arphaman
Subscribers: mclow.lists, ldionne, dexonsmith, ioeric, christof, kadircet, cfe-commits
Differential Revision: https://reviews.llvm.org/D54630
llvm-svn: 348365
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Until someone rewrites the stdlib logic for Darwin so that we don't need
to pass down the -stdlib argument to cc1.
(see https://llvm.org/bugs/show_bug.cgi?id=30548)
Differential Revision: https://reviews.llvm.org/D24601
llvm-svn: 282701
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I'd accidentally skipped the CMake check in a premature optimisation. I'd also
put the original test in completely the wrong place.
Thanks Jonas Hahnfeld!
llvm-svn: 260898
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