Add ReleaseLTO cache file

This is currently a copy of Release with a more obvious name.

llvm-svn: 295147

Author: MatzeB

cmake/caches/ReleaseLTO.cmake

@@ -0,0 +1,9 @@
+# Aggressive settings to produce fast code.
+set(OPTFLAGS "${OPTFLAGS} -O3 -fomit-frame-pointer -flto -DNDEBUG")
+if(APPLE)
+  set(OPTFLAGS "${OPTFLAGS} -mdynamic-no-pic")
+endif()
+
+set(CMAKE_C_FLAGS_RELEASE "${OPTFLAGS}" CACHE STRING "")
+set(CMAKE_CXX_FLAGS_RELEASE "${OPTFLAGS}" CACHE STRING "")
+set(CMAKE_BUILD_TYPE "Release" CACHE STRING "")