[llvm] r308698 - Generate a compile_commands.json DB for external projects.

[George Karpenkov via llvm-commits]

Author: george.karpenkov
Date: Thu Jul 20 16:46:46 2017
New Revision: 308698

URL: http://llvm.org/viewvc/llvm-project?rev=308698&view=rev
Log:
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

Modified:
    llvm/trunk/cmake/modules/LLVMExternalProjectUtils.cmake

Modified: llvm/trunk/cmake/modules/LLVMExternalProjectUtils.cmake
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/cmake/modules/LLVMExternalProjectUtils.cmake?rev=308698&r1=308697&r2=308698&view=diff
==============================================================================
--- llvm/trunk/cmake/modules/LLVMExternalProjectUtils.cmake (original)
+++ llvm/trunk/cmake/modules/LLVMExternalProjectUtils.cmake Thu Jul 20 16:46:46 2017
@@ -149,6 +149,7 @@ function(llvm_ExternalProject_Add name s
                -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 ""