diff options
Diffstat (limited to 'tools/common_compiler_flags.py')
| -rw-r--r-- | tools/common_compiler_flags.py | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tools/common_compiler_flags.py b/tools/common_compiler_flags.py index 6a1fb69..e645f39 100644 --- a/tools/common_compiler_flags.py +++ b/tools/common_compiler_flags.py @@ -22,6 +22,10 @@ def exists(env): def generate(env): + assert env["lto"] in ["thin", "full", "none"], "Unrecognized lto: {}".format(env["lto"]) + if env["lto"] != "none": + print("Using LTO: " + env["lto"]) + # Require C++17 if env.get("is_msvc", False): env.Append(CXXFLAGS=["/std:c++17"]) @@ -64,6 +68,22 @@ def generate(env): env.Append(LINKFLAGS=["/OPT:REF"]) elif env["optimize"] == "debug" or env["optimize"] == "none": env.Append(CCFLAGS=["/Od"]) + + if env["lto"] == "thin": + if not env["use_llvm"]: + print("ThinLTO is only compatible with LLVM, use `use_llvm=yes` or `lto=full`.") + env.Exit(255) + + env.Append(CCFLAGS=["-flto=thin"]) + env.Append(LINKFLAGS=["-flto=thin"]) + elif env["lto"] == "full": + if env["use_llvm"]: + env.Append(CCFLAGS=["-flto"]) + env.Append(LINKFLAGS=["-flto"]) + else: + env.AppendUnique(CCFLAGS=["/GL"]) + env.AppendUnique(ARFLAGS=["/LTCG"]) + env.AppendUnique(LINKFLAGS=["/LTCG"]) else: if env["debug_symbols"]: # Adding dwarf-4 explicitly makes stacktraces work with clang builds, @@ -91,3 +111,13 @@ def generate(env): env.Append(CCFLAGS=["-Og"]) elif env["optimize"] == "none": env.Append(CCFLAGS=["-O0"]) + + if env["lto"] == "thin": + if (env["platform"] == "windows" or env["platform"] == "linux") and not env["use_llvm"]: + print("ThinLTO is only compatible with LLVM, use `use_llvm=yes` or `lto=full`.") + env.Exit(255) + env.Append(CCFLAGS=["-flto=thin"]) + env.Append(LINKFLAGS=["-flto=thin"]) + elif env["lto"] == "full": + env.Append(CCFLAGS=["-flto"]) + env.Append(LINKFLAGS=["-flto"]) |