[sanitizer] Cache results of darwin_test_archs
For OS X builds of compiler-rt, we run `darwin_test_archs` to determine which architectures can the toolchain target. This detection takes quite a long time, and the result is always the same (as long as you don't upgrade your OS, system headers or toolchain). Let's cache the result.
Differential Revision: http://reviews.llvm.org/D15179
llvm-svn: 254618
diff --git a/compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake b/compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake
index 4947ae4..b304df2 100644
--- a/compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake
+++ b/compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake
@@ -46,6 +46,11 @@
# This function takes an OS and a list of architectures and identifies the
# subset of the architectures list that the installed toolchain can target.
function(darwin_test_archs os valid_archs)
+ if(${valid_archs})
+ message(STATUS "Using cached valid architectures for ${os}.")
+ return()
+ endif()
+
set(archs ${ARGN})
message(STATUS "Finding valid architectures for ${os}...")
set(SIMPLE_CPP ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/src.cpp)
@@ -75,7 +80,8 @@
list(APPEND working_archs ${arch})
endif()
endforeach()
- set(${valid_archs} ${working_archs} PARENT_SCOPE)
+ set(${valid_archs} ${working_archs}
+ CACHE STRING "List of valid architectures for platform ${os}.")
endfunction()
# This function checks the host cpusubtype to see if it is post-haswell. Haswell