set(CMAKE_C_STANDARD_LIBRARIES "${CMAKE_C_STANDARD_LIBRARIES}${LLVM_SYSTEM_LIBS}")
endif()
+if( MINGW )
+ # People report that -O3 is unreliable on MinGW. The traditional
+ # build also uses -O2 for that reason:
+ llvm_replace_compiler_option(CMAKE_CXX_FLAGS_RELEASE "-O3" "-O2")
+endif()
+
add_subdirectory(lib/Support)
# Everything else depends on Support:
include(AddFileDependencies)
+macro(llvm_replace_compiler_option var old new)
+ # Replaces a compiler option or switch `old' in `var' by `new'.
+ # If `old' is not in `var', appends `new' to `var'.
+ # Example: llvm_replace_compiler_option(CMAKE_CXX_FLAGS_RELEASE "-O3" "-O2")
+ if( "${${var}}" MATCHES "(^| )${old}($| )" )
+ string( REGEX REPLACE "(^| )${old}($| )" " ${new} " ${var} "${${var}}" )
+ else()
+ set( ${var} "${${var}} ${new}" )
+ endif()
+endmacro(llvm_replace_compiler_option)
macro(add_td_sources srcs)
file(GLOB tds *.td)