Summary:
The date-based approach to detecting unsupported versions of libstdc++
does not handle bug fix releases of older versions. As an example, the
`__GLIBCXX__` value associated with version 5.1, `20150422`, is less
than the values associated with versions 4.8.5 and 4.9.3.
This patch adds secondary checks based on certain properties in
sufficiently new versions of libstdc++.
Reviewers: jfb, tstellar, rnk, sfertile, nemanjai
Reviewed By: jfb
Subscribers: mgorny, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D58682
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@355638 91177308-0d34-0410-b5e6-96231b3b80d8
Reverting D57264 again, it looks like we're down to two bots that need fixing:
polly-amd64-linux
polly-arm-linux
They both have old versions of libstdc++ and recent clang.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@352954 91177308-0d34-0410-b5e6-96231b3b80d8
A handful of bots are still breaking, either because I missed them in my audit,
they were offline, or something else. I'm contacting their authors, but I'll
revert for now and re-commit later.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@352814 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Capture the current agreed-upon toolchain update policy based on the following
discussions:
- LLVM dev meeting 2018 BoF "Migrating to C++14, and beyond!"
llvm.org/devmtg/2018-10/talk-abstracts.html#bof3
- A Short Policy Proposal Regarding Host Compilers
lists.llvm.org/pipermail/llvm-dev/2018-May/123238.html
- Using C++14 code in LLVM (2018)
lists.llvm.org/pipermail/llvm-dev/2018-May/123182.html
- Using C++14 code in LLVM (2017)
lists.llvm.org/pipermail/llvm-dev/2017-October/118673.html
- Using C++14 code in LLVM (2016)
lists.llvm.org/pipermail/llvm-dev/2016-October/105483.html
- Document and Enforce new Host Compiler Policy
llvm.org/D47073
- Require GCC 5.1 and LLVM 3.5 at a minimum
llvm.org/D46723
Subscribers: jkorous, dexonsmith, llvm-commits
Differential Revision: https://reviews.llvm.org/D56819
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351765 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: This change factors out compiler checking / warning, and documents LLVM_FORCE_USE_OLD_TOOLCHAIN. It doesn't introduce any functional changes nor policy changes, these will come late.
Subscribers: mgorny, jkorous, dexonsmith, llvm-commits
Differential Revision: https://reviews.llvm.org/D56799
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351387 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Always respect existing CMAKE_REQUIRED_FLAGS when adding
additional ones. This is important when cross compiling where
--sysroot and -target were already added.
In particular, this is needed when cross compiling from Darwin to
Linux, since --sysroot is required to find headers and libraries.
Cmake has a similar bug in check_include_file[_cxx] where
CMAKE_REQUIRED_LIBRARIES isn't passed, which causes
try_compile to fail.
(please see https://gitlab.kitware.com/cmake/cmake/merge_requests/1620)
Reviewers: compnerd, silvas, beanz, brad.king
Reviewed By: compnerd
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D41568
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321434 91177308-0d34-0410-b5e6-96231b3b80d8
I'm not sure what determines the minor version, but it appears
that it's possible for a fully updated, release version of
VS2015 with Update 3 can go (at least) as low as 19.00.24213.1.
Updating the compiler version check to account for this so we
don't generate superfluous warnings.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290914 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This is temporary, until bot that builds public facing LLVM
documentation is upgraded. It reverts only the cmake change in r284497,
but leaves the doc changes in place to preserve intent.
Reviewers: aaron.ballman
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D26078
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285406 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
The RFC proposal sent to increase the minimum required GCC version
to 4.8 received a lot of support. See the following thread:
http://lists.llvm.org/pipermail/llvm-dev/2016-October/105955.html,
This patch implements that by updating the docs. I believe the
references to libstdc++ 4.7 issues can be removed as well, please
let me know if that is not the case or if they should be updated
a different way.
Reviewers: rengolin
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D25683
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284497 91177308-0d34-0410-b5e6-96231b3b80d8
Add a missing include. This is important in the case HandleLLVMOptions is
included prior to the missing CheckCXXSourceCompiles or CheckCXXCompilerFlag
which includes CheckCXXSourceCompiles.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262949 91177308-0d34-0410-b5e6-96231b3b80d8
Otherwise users get messages from CheckAtomic about missing libatomic
instead of a sensible message that says "use GCC 4.7 or newer".
I structured the change along the lines of HandleLLVMStdlib.cmake, so
that the standalone build of Clang still gets the compiler version
check.
Reviewers: beanz
Differential Revision: http://reviews.llvm.org/D17789
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262491 91177308-0d34-0410-b5e6-96231b3b80d8
