Summary:
This is a first patch for GSoC project, bash-completion for clang.
To use this on bash, please run `source clang/utils/bash-autocomplete.sh`.
bash-autocomplete.sh is code for bash-completion.

Simple flag completion and path completion is available in this patch.

Reviewers: teemperor, v.g.vassilev, ruiu, Bigcheese, efriedma

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D33237

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Thanks to Matthew Larionov <matthewtff@gmail.com>

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Summary: Implement new Z3 constraint manager backend.

Reviewers: zaks.anna, dcoughlin, NoQ, xazax.hun

Subscribers: mgorny, cfe-commits

Differential Revision: https://reviews.llvm.org/D28952

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CMake handles paths with slashes. It caused cmake/install failure on msbuild.exe.

Note, Other llvm-config-oriented variables have been normalized since they are stored in the cache attributed with PATH.

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Use the new llvm_canonicalize_cmake_booleans() function to canonicalize
booleans for lit tests. Replace the duplicate ENABLE_CLANG* variables
used to hold canonicalized values with in-place canonicalization. Use
implicit logic in Python code to avoid overrelying on exact 0/1 values.

Differential Revision: https://reviews.llvm.org/D28529

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These two are independent: it's possible to use LLD without LTO,
and it's possible to do LTO build without LLD.

Differential Revision: https://reviews.llvm.org/D28821

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Use the new --cmakedir option to obtain LLVM_CMAKE_PATH straight from
llvm-config instead of reconstructing it locally.

Differential Revision: https://reviews.llvm.org/D26900

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This diff fixes the clean build of the target generate-order-file.
In llvm/tools/clang/CMakeLists.txt 
add_subdirectory(utils/perf-training) should go after the block where 
the value of the variable CLANG_ORDER_FILE is set - otherwise 
(tested with cmake's version 3.6.2) the arguments of perf-helper.py gen-order-file
will be ill-formed (CLANG_ORDER_FILE will be empty).

Differential revision: https://reviews.llvm.org/D28153


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This change allows setting the default linker used by the Clang
driver when configuring the build.

Differential Revision: https://reviews.llvm.org/D25263

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lld has LTO support, if requested we should add a dependency on lld
rather than LLVMgold when doing LTO bootstrap build.

Differential Revision: https://reviews.llvm.org/D26649

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Having this target allows other parts of the build system to add to the bootstrap dependencies without needing to be defined before the bootstrap targets are created.

This will specifically be used connect the builtins build from the LLVM runtimes directory as a dependency of the next build stage.

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Update the lit search logic to support all names supported in LLVM
(since r283029). The search order (i.e. PATHS vs HINTS) does no really
matter since the established path is not used, except for determining
whether lit is available.

Differential Revision: https://reviews.llvm.org/D23745

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This just passes through a few missing CMake variables for multi-stage builds.

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Checking defined isn't good enough we also need to handle defined to empty string.

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Checking if they evaluate to true cases prevents passing values that evaluate to false cases. Instead we should check if the variables are defined.

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When supporting overriding clang versions we also need to pass those through to the next stage so they remain overridden.

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As with how we handle LLVM_VERSION_* variables we should support
overriding clang version variables.

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Currently, the Clang version is computed as follows:

 1. LLVM defines major, minor, and patch versions, all statically set. Today,
    these are 4, 0, and 0, respectively.
 2. The static version numbers are combined into PACKAGE_VERSION along with a
    suffix, so the result today looks like "4.0.0svn".
 3. Clang extracts CLANG_VERSION from PACKAGE_VERSION using a regexp. The regexp
    allows the patch level to omitted, and drops any non-digit trailing values.
    Today, this result looks like "4.0.0".
 4. CLANG_VERSION is then split further into CLANG_VERSION_MAJOR and
    CLANG_VERSION_MINOR. Today, these resolve to 4 and 0, respectively.
 5. If CLANG_VERSION matches a regexp with three version components, then
    CLANG_VERSION_PATCHLEVEL is extracted and the CLANG_HAS_VERSION_PATCHLEVEL
    variable is set to 1. Today, these values are 0 and 1, respectively.
 6. The CLANG_VERSION_* variables (and CLANG_HAS_VERSION_PATCHLEVEL) are
    configured into [llvm/tools/clang/]include/clang/Basic/Version.inc
    verbatim by CMake.
 7. In [llvm/tools/clang/]include/clang/Basic/Version.h, macros are defined
    conditionally, based on CLANG_HAS_VERSION_PATCHLEVEL, to compute
    CLANG_VERSION_STRING as either a two- or three-level version number. Today,
    this value is "4.0.0", because despite the patchlevel being 0, it was
    matched by regexp and is thus "HAS"ed by the preprocessor. This string is
    then used wherever Clang's "version" is needed [*].

[*] Including, notably, by compiler-rt, for computing its installation path.

This change collapses steps 2-5 by defaulting Clang to use LLVM's (non-string)
version components for the Clang version (see [*] for why not PACKAGE_VERSION),
and collapses steps 6 and 7 by simply writing CLANG_VERSION_STRING into
Version.inc. The Clang version today always uses the patchlevel form, so the
collapsed Version.inc does not have logic for a version without a patch level.

Historically speaking, this technique began with the VER file in r82085 (which
survives in the form of the regexp in #3). The major, minor, and patchlevel
versions were introduced by r106863 (which remains in #4-6). The VER file itself
was deleted in favor of the LLVM version number in r106914. On the LLVM side,
the individual LLVM_VERSION_MAJOR, LLVM_VERSION_MINOR, and PACKAGE_VERSION
weren't introduced for nearly two more years, until r150405.

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Summary:
Add a cmake check for sys/resource.h and replace the __has_include() check with its result, in order to make it possible to use rlimits when building with compilers not supporting __has_include() -- i.e. when bootstrapping.

// Please also re-apply dfcd52eb (llvm-config.h fix)

Patch by: Michał Górny

Reviewers: rsmith, beanz

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D23744

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This patch adds a few new convenience options used by the PGO CMake cache to setup options on bootstrap stages. The new options are:

PGO_INSTRUMENT_LTO - Builds the instrumented and final builds with LTO
PGO_BUILD_CONFIGURATION - Accepts a CMake cache script that can be used for complex configuration of the stage2-instrumented and stage2 builds.

The patch also includes a fix for bootstrap dependencies so that the instrumented LTO tools don't get used when building the final stage, and it adds distribution targets to the passthrough.

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This patch introduces a new cmake variable: CLANG_DEFAULT_RTLIB, thru
which we can specify a default value for -rtlib (libgcc or
compiler-rt) at build time, just like how we set the default C++
stdlib thru CLANG_DEFAULT_CXX_STDLIB.

With these two options, we can configure clang to build binaries on
Linux that have no runtime dependence on any gcc libs (libstdc++ or
libgcc_s).

Patch by Lei Zhang!

Differential Revision: https://reviews.llvm.org/D22663

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On OS X 10.11 System Integrity Protection prevents the DYLD environment variables from being set on system binaries. To work around this r276710 accepts DYLD_LIBRARY_PATH as a CMake variable and sets it directly on the archiver commands.

To make this work with bootstrapping we need to set DYLD_LIBRARY_PATH to the current stage's library directory and pass that into the next stage's configuration.

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In Bootstrap builds Clang logs some warnings. These are caused because Clang passes CLANG_STAGE and BOOTSTRAP_DEFAULT_PASSTHROUGH into the next stage's configuration.

BOOTSTRAP_DEFAULT_PASSTHROUGH shouldn't be passed, so it is renamed to _BOOTSTRAP_DEFAULT_PASSTHROUGH, to prevent passthrough.

CLANG_STAGE should be passed, so I've changed the code to log it if it is set outside the if(CLANG_ENABLE_BOOTSTRAP) block. This makes the variable always used, so the warning goes away.

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We agreed to call it "platform default" instead of "architecture default".
(see D17286)

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LLVM_BUILD_TOOLS is a boolean variable that controls whether or not generated
targets for llvm tools are built by the "all" target. CLANG_BUILD_TOOLS is an
analogous variable for clang targets.

This is useful functionality for selectively disabling the building of clang
targets by default to speed up builds.

In terms of implementation, I just followed the model of LLVM's implementation
of this functionality.

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This matches how LLVM has its cmake files organized and is cleaner than just
shoving this business logic into the main CMakeLists.txt.

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[cmake] Move creation of ClangTargets and installation of ClangConfig.cmake from ./CMakeLists.txt -> ./cmake/modules/CMakeLists.txt.

This matches LLVM.

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I added this option in r257827 to try and add compatibility with autoconf. At the time I misunderstood the problem.

Our CMake automatically generates the SVN revision information and generates a build action to update it so builds don't need to be re-configured on SCM update (which is a better solution than we had in autoconf).

The problem I was actually seeing was isolated cases where SVN revision information isn't available because the repository structures have been removed. This happens in some automated testing systems.

This patch allows SVN_REVISION to be overridden if the build configuration could not find the SCM repository structures, and removes the code from my original patch because it is unnecessary.

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This corresponds to binutils' --enable-x86-relax-relocations.

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Now that we're on CMake 3.4.3 all the ExternalProject features we use are supported everywhere, so we don't need the version checks anymore.

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We don't need any checks for this code anymore. Since CMake version is always greater than 3 we can always generate the exports file.

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CMake 2.8.12 introduced interface libraries and some related policies. This removes the conditional block because we're now past 2.8.12.

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This reverts r272275. This actually wasn't the right way to fix the problem. The correct solution is in r272279.

Applying the fix to LLVM as done in r272279, means this fix will get picked up by all projects building out of tree using LLVM's CMake modules. As opposed to the fix I had in r272275, which would require each project to change.

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The out-of-tree build needs to read LLVM_TOOLS_INSTALL_DIR out of TOOLS_BINARY_DIR because LLVM_TOOLS_INSTALL_DIR is used by AddLLVM.cmake

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We now have a cmake option to change the default: ENABLE_LINKER_BUILD_ID.

The reason is that build-id is fairly expensive, so we shouldn't impose
it in the regular edit/build cycle.

This is similar to gcc, that has an off by default --enable-linker-build-id
option.

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Summary:
This is as per the discussions on developer lists:

http://lists.llvm.org/pipermail/llvm-dev/2016-April/098780.html
http://lists.llvm.org/pipermail/llvm-dev/2016-May/100058.html

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D20823

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llvm-ar isn't really supported for Darwin, instead the host tools will load libLTO, so we can use the just-built libLTO.

This actually makes Darwin bootstrap builds a little faster because you don't need to build llvm-ar before starting the next stage.

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This is re-landing r260742. I've reworked the conditionals so that it only hits when targeting Apple platforms with ld64.

Original Summary:
With this change generating clang order files using dtrace uses the following workflow:

cmake <whatever options you want>

ninja generate-order-file

ninja clang

This patch works by setting a default path to the order file (which can be overridden by the user). If the order file doesn't exist during configuration CMake will create an empty one.

CMake then ties up the dependencies between the clang link job and the order file, and generate-order-file overwrites CLANG_ORDER_FILE with the new order file.

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