Update LLVM CMakeFiles to include BOLT

[Amir]

Summary

Add BOLT to the project list enabling its build.

[mehdi_amini]

LGTM.

This is to land after Bolt merge gets pushed right?

[Amir]

In D117063#3235777, @mehdi_amini wrote:

LGTM.

This is to land after Bolt merge gets pushed right?

BOLT is now merged! https://github.com/llvm/llvm-project/commit/4c106cfdf7cf7eec861ad3983a3dd9a9e8f3a8ae

Actually, would it make sense to add it to LLVM_EXTRA_PROJECTS instead similar to flang?

[mehdi_amini]

Actually, would it make sense to add it to LLVM_EXTRA_PROJECTS instead similar to flang?

Flang is there because it requires C++17 I believe.

[mehdi_amini]

(I assume Bolt supports the same environments (compilers / host) as LLVM overall?)

[Amir]

In D117063#3235807, @mehdi_amini wrote:

(I assume Bolt supports the same environments (compilers / host) as LLVM overall?)

Right.

[Amir]

Rebase

[Amir]

In D117063#3235777, @mehdi_amini wrote:

LGTM.

This is to land after Bolt merge gets pushed right?

Could you accept the diff?

llvm/CMakeLists.txt

if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
   message(STATUS "No build type selected, default to Debug")
   set(CMAKE_BUILD_TYPE "Debug" CACHE STRING "Build type (default Debug)" FORCE)
 endif()
 
 # Side-by-side subprojects layout: automatically set the
 # LLVM_EXTERNAL_${project}_SOURCE_DIR using LLVM_ALL_PROJECTS
 # This allows an easy way of setting up a build directory for llvm and another
 # one for llvm+clang+... using the same sources.
-set(LLVM_ALL_PROJECTS "clang;clang-tools-extra;compiler-rt;cross-project-tests;libc;libclc;libcxx;libcxxabi;libunwind;lld;lldb;mlir;openmp;polly;pstl")
+set(LLVM_ALL_PROJECTS "bolt;clang;clang-tools-extra;compiler-rt;cross-project-tests;libc;libclc;libcxx;libcxxabi;libunwind;lld;lldb;mlir;openmp;polly;pstl")
 # The flang project is not yet part of "all" projects (see C++ requirements)
 set(LLVM_EXTRA_PROJECTS "flang")
 # List of all known projects in the mono repo
 set(LLVM_KNOWN_PROJECTS "${LLVM_ALL_PROJECTS};${LLVM_EXTRA_PROJECTS}")
 set(LLVM_ENABLE_PROJECTS "" CACHE STRING
     "Semicolon-separated list of projects to build (${LLVM_KNOWN_PROJECTS}), or \"all\".")
 foreach(proj ${LLVM_ENABLE_PROJECTS})
   if (NOT proj STREQUAL "all" AND NOT proj STREQUAL "llvm" AND NOT "${proj}" IN_LIST LLVM_KNOWN_PROJECTS)

llvm/tools/CMakeLists.txt

 # Projects supported via LLVM_EXTERNAL_*_SOURCE_DIR need to be explicitly
 # specified.
 add_llvm_external_project(clang)
 add_llvm_external_project(lld)
 add_llvm_external_project(lldb)
 add_llvm_external_project(mlir)
 # Flang depends on mlir, so place it afterward
 add_llvm_external_project(flang)
+add_llvm_external_project(bolt)
 
 # Automatically add remaining sub-directories containing a 'CMakeLists.txt'
 # file as external projects.
 add_llvm_implicit_projects()
 
 add_llvm_external_project(polly)
 
 # Add subprojects specified using LLVM_EXTERNAL_PROJECTS
 foreach(p ${LLVM_EXTERNAL_PROJECTS})
   add_llvm_external_project(${p})
 endforeach(p)
 
 set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} PARENT_SCOPE)