[cmake] Add function for building native tool
Instead of duplicating functionality for building native versions of
tblgen and llvm-config, add a function to set up a native tool build.
This will also be used for llvm-nm in a follow-up.
This should be NFC for tblgen, besides the slightly different COMMENT
for the custom command (it'll display the tablegen target name instead
of always saying TableGen). For the native llvm-config, it's a behavior
change in that we'll use llvm_ExternalProject_BuildCmd instead of
constructing the build command manually, always build in Release, and
reference the correct binary path for multi-config generators. I believe
all of these changes to be bug fixes.
Differential Revision: https://reviews.llvm.org/D60024
llvm-svn: 357486
diff --git a/llvm/cmake/modules/CrossCompile.cmake b/llvm/cmake/modules/CrossCompile.cmake
index bc3b210..d199605 100644
--- a/llvm/cmake/modules/CrossCompile.cmake
+++ b/llvm/cmake/modules/CrossCompile.cmake
@@ -1,3 +1,5 @@
+include(LLVMExternalProjectUtils)
+
function(llvm_create_cross_target_internal target_name toolchain buildtype)
if(NOT DEFINED LLVM_${target_name}_BUILD)
@@ -67,4 +69,29 @@
llvm_create_cross_target_internal(${target_name} ${sysroot} ${CMAKE_BUILD_TYPE})
endfunction()
+# Sets up a native build for a tool, used e.g. for cross-compilation and
+# LLVM_OPTIMIZED_TABLEGEN. Always builds in Release.
+# - target: The target to build natively
+# - output_path_var: A variable name which receives the path to the built target
+# - DEPENDS: Any additional dependencies for the target
+function(build_native_tool target output_path_var)
+ cmake_parse_arguments(ARG "" "" "DEPENDS" ${ARGN})
+
+ if(CMAKE_CONFIGURATION_TYPES)
+ set(output_path "${LLVM_NATIVE_BUILD}/Release/bin/${target}")
+ else()
+ set(output_path "${LLVM_NATIVE_BUILD}/bin/${target}")
+ endif()
+
+ llvm_ExternalProject_BuildCmd(build_cmd ${target} ${LLVM_NATIVE_BUILD}
+ CONFIGURATION Release)
+ add_custom_command(OUTPUT "${output_path}"
+ COMMAND ${build_cmd}
+ DEPENDS CONFIGURE_LLVM_NATIVE ${ARG_DEPENDS}
+ WORKING_DIRECTORY "${LLVM_NATIVE_BUILD}"
+ COMMENT "Building native ${target}..."
+ USES_TERMINAL)
+ set(${output_path_var} "${output_path}" PARENT_SCOPE)
+endfunction()
+
llvm_create_cross_target_internal(NATIVE "" Release)
