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[CMake] Copy C++ headers before configuring runtimes build

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Summary: On some platforms C++ headers are packaged with the compiler not the sysroot. If you don't copy C++ headers into the build include directory during configuraiton of the outer build the C++ check during the runtime configuration may get inaccurate results.

Reviewers: phosek, compnerd, smeenai, EricWF

Reviewed By: compnerd

Subscribers: EricWF, christof, libcxx-commits, mgorny, llvm-commits

Tags: #llvm, #libc

Differential Revision: https://reviews.llvm.org/D62155

llvm-svn: 361513
This commit is contained in:
Chris Bieneman 2019-05-23 17:06:46 +00:00
parent 0d19bba33e
commit 8070c97a76
1 changed files with 13 additions and 4 deletions
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17
runtimes/CMakeLists.txt
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@ -4,8 +4,12 @@
# should be built with the LLVM toolchain from the build directory. This file is
# a first step to formalizing runtime build interfaces.
# In the current state this file only works with compiler-rt, other runtimes
# will work as the runtime build interface standardizes.
# Setting CMake minimum required version should be at the very top of the file
# if this is the entry point.
if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
cmake_minimum_required(VERSION 3.4.3)
project(Runtimes C CXX ASM)
endif()
# Find all subdirectories containing CMake projects
file(GLOB entries *)
@ -205,6 +209,11 @@ if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR})
else() # if this is included from LLVM's CMake
include(LLVMExternalProjectUtils)
if (LLVM_EXTERNAL_LIBCXX_SOURCE_DIR)
set(LIBCXX_HEADER_DIR ${LLVM_INCLUDE_DIR}/c++/v1/)
set(CXX_HEADER_TARGET runtime-libcxx-headers)
add_subdirectory(${LLVM_EXTERNAL_LIBCXX_SOURCE_DIR}/include ${CXX_HEADER_TARGET})
endif()
if(NOT LLVM_BUILD_RUNTIMES)
set(EXTRA_ARGS EXCLUDE_FROM_ALL)
@ -354,7 +363,7 @@ else() # if this is included from LLVM's CMake
llvm_ExternalProject_Add(runtimes
${CMAKE_CURRENT_SOURCE_DIR}
DEPENDS ${ARG_DEPENDS}
DEPENDS ${ARG_DEPENDS} runtime-libcxx-headers
# Builtins were built separately above
CMAKE_ARGS -DCOMPILER_RT_BUILD_BUILTINS=Off
-DLLVM_INCLUDE_TESTS=${LLVM_INCLUDE_TESTS}
@ -445,7 +454,7 @@ else() # if this is included from LLVM's CMake
llvm_ExternalProject_Add(runtimes-${name}
${CMAKE_CURRENT_SOURCE_DIR}
DEPENDS ${${name}_deps}
DEPENDS ${${name}_deps} runtime-libcxx-headers
# Builtins were built separately above
CMAKE_ARGS -DCOMPILER_RT_BUILD_BUILTINS=Off
-DLLVM_INCLUDE_TESTS=${LLVM_INCLUDE_TESTS}