From: George Karpenkov <ekarpenkov@apple.com>
Date: Thu, 20 Jul 2017 23:46:46 +0000 (+0000)
Subject: Generate a compile_commands.json DB for external projects.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7f5a7a443da9bee41c3399f67e4482f1dbc7065c;p=llvm

Generate a compile_commands.json DB for external projects.

compile_commands.json file is very useful both for tooling and for
reproducible builds.
For files generated from recursive CMake invocation this information was
not previously generated.

Differential Review: https://reviews.llvm.org/D35219

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308698 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/cmake/modules/LLVMExternalProjectUtils.cmake b/cmake/modules/LLVMExternalProjectUtils.cmake
index c851eb8dbf0..c3560836f7e 100644
--- a/cmake/modules/LLVMExternalProjectUtils.cmake
+++ b/cmake/modules/LLVMExternalProjectUtils.cmake
@@ -149,6 +149,7 @@ function(llvm_ExternalProject_Add name source_dir)
                -DPACKAGE_VERSION=${PACKAGE_VERSION}
                -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
                -DCMAKE_MAKE_PROGRAM=${CMAKE_MAKE_PROGRAM}
+               -DCMAKE_EXPORT_COMPILE_COMMANDS=1
                ${ARG_CMAKE_ARGS}
                ${PASSTHROUGH_VARIABLES}
     INSTALL_COMMAND ""