Merge pull request #78232 from akien-mga/scons-debug-ffile-prefix-map
SCons: Add `-ffile-prefix-map` GCC/Clang option to make debug file paths relative
This commit is contained in:
Rémi Verschelde
commit
e5c4ce60de
1 changed files with 81 additions and 67 deletions
148
SConstruct
148
SConstruct
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@ -180,6 +180,7 @@ opts.Add(
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)
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opts.Add(BoolVariable("debug_symbols", "Build with debugging symbols", False))
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opts.Add(BoolVariable("separate_debug_symbols", "Extract debugging symbols to a separate file", False))
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opts.Add(BoolVariable("debug_paths_relative", "Make file paths in debug symbols relative (if supported)", True))
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opts.Add(EnumVariable("lto", "Link-time optimization (production builds)", "none", ("none", "auto", "thin", "full")))
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opts.Add(BoolVariable("production", "Set defaults to build Godot for use in production", False))
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opts.Add(BoolVariable("threads", "Enable threading support", True))
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@ -583,73 +584,6 @@ print(f'Building for platform "{selected_platform}", architecture "{env["arch"]}
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if env.dev_build:
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print("NOTE: Developer build, with debug optimization level and debug symbols (unless overridden).")
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# Set optimize and debug_symbols flags.
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# "custom" means do nothing and let users set their own optimization flags.
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# Needs to happen after configure to have `env.msvc` defined.
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if env.msvc:
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if env["debug_symbols"]:
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env.Append(CCFLAGS=["/Zi", "/FS"])
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env.Append(LINKFLAGS=["/DEBUG:FULL"])
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else:
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env.Append(LINKFLAGS=["/DEBUG:NONE"])
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if env["optimize"] == "speed":
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env.Append(CCFLAGS=["/O2"])
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env.Append(LINKFLAGS=["/OPT:REF"])
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elif env["optimize"] == "speed_trace":
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env.Append(CCFLAGS=["/O2"])
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env.Append(LINKFLAGS=["/OPT:REF", "/OPT:NOICF"])
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elif env["optimize"] == "size":
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env.Append(CCFLAGS=["/O1"])
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env.Append(LINKFLAGS=["/OPT:REF"])
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elif env["optimize"] == "debug" or env["optimize"] == "none":
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env.Append(CCFLAGS=["/Od"])
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else:
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if env["debug_symbols"]:
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# Adding dwarf-4 explicitly makes stacktraces work with clang builds,
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# otherwise addr2line doesn't understand them
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env.Append(CCFLAGS=["-gdwarf-4"])
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if env.dev_build:
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env.Append(CCFLAGS=["-g3"])
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else:
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env.Append(CCFLAGS=["-g2"])
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else:
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if methods.using_clang(env) and not methods.is_vanilla_clang(env):
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# Apple Clang, its linker doesn't like -s.
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env.Append(LINKFLAGS=["-Wl,-S", "-Wl,-x", "-Wl,-dead_strip"])
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else:
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env.Append(LINKFLAGS=["-s"])
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if env["optimize"] == "speed":
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env.Append(CCFLAGS=["-O3"])
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# `-O2` is friendlier to debuggers than `-O3`, leading to better crash backtraces.
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elif env["optimize"] == "speed_trace":
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env.Append(CCFLAGS=["-O2"])
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elif env["optimize"] == "size":
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env.Append(CCFLAGS=["-Os"])
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elif env["optimize"] == "debug":
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env.Append(CCFLAGS=["-Og"])
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elif env["optimize"] == "none":
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env.Append(CCFLAGS=["-O0"])
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# Needs to happen after configure to handle "auto".
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if env["lto"] != "none":
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print("Using LTO: " + env["lto"])
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# Set our C and C++ standard requirements.
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# C++17 is required as we need guaranteed copy elision as per GH-36436.
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# Prepending to make it possible to override.
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# This needs to come after `configure`, otherwise we don't have env.msvc.
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if not env.msvc:
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# Specifying GNU extensions support explicitly, which are supported by
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# both GCC and Clang. Both currently default to gnu11 and gnu++14.
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env.Prepend(CFLAGS=["-std=gnu11"])
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env.Prepend(CXXFLAGS=["-std=gnu++17"])
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else:
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# MSVC doesn't have clear C standard support, /std only covers C++.
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# We apply it to CCFLAGS (both C and C++ code) in case it impacts C features.
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env.Prepend(CCFLAGS=["/std:c++17"])
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# Enforce our minimal compiler version requirements
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cc_version = methods.get_compiler_version(env) or {
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"major": None,
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@ -695,6 +629,9 @@ if methods.using_gcc(env):
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"to switch to posix threads."
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)
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Exit(255)
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if env["debug_paths_relative"] and cc_version_major < 8:
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print("GCC < 8 doesn't support -ffile-prefix-map, disabling `debug_paths_relative` option.")
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env["debug_paths_relative"] = False
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elif methods.using_clang(env):
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if cc_version_major == -1:
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print(
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@ -717,12 +654,89 @@ elif methods.using_clang(env):
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"support C++17. Supported versions are Apple Clang 10 and later."
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)
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Exit(255)
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if env["debug_paths_relative"] and not vanilla and cc_version_major < 12:
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print("Apple Clang < 12 doesn't support -ffile-prefix-map, disabling `debug_paths_relative` option.")
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env["debug_paths_relative"] = False
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elif cc_version_major < 6:
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print(
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"Detected Clang version older than 6, which does not fully support "
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"C++17. Supported versions are Clang 6 and later."
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)
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Exit(255)
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if env["debug_paths_relative"] and cc_version_major < 10:
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print("Clang < 10 doesn't support -ffile-prefix-map, disabling `debug_paths_relative` option.")
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env["debug_paths_relative"] = False
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# Set optimize and debug_symbols flags.
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# "custom" means do nothing and let users set their own optimization flags.
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# Needs to happen after configure to have `env.msvc` defined.
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if env.msvc:
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if env["debug_symbols"]:
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env.Append(CCFLAGS=["/Zi", "/FS"])
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env.Append(LINKFLAGS=["/DEBUG:FULL"])
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else:
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env.Append(LINKFLAGS=["/DEBUG:NONE"])
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if env["optimize"] == "speed":
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env.Append(CCFLAGS=["/O2"])
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env.Append(LINKFLAGS=["/OPT:REF"])
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elif env["optimize"] == "speed_trace":
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env.Append(CCFLAGS=["/O2"])
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env.Append(LINKFLAGS=["/OPT:REF", "/OPT:NOICF"])
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elif env["optimize"] == "size":
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env.Append(CCFLAGS=["/O1"])
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env.Append(LINKFLAGS=["/OPT:REF"])
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elif env["optimize"] == "debug" or env["optimize"] == "none":
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env.Append(CCFLAGS=["/Od"])
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else:
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if env["debug_symbols"]:
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# Adding dwarf-4 explicitly makes stacktraces work with clang builds,
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# otherwise addr2line doesn't understand them
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env.Append(CCFLAGS=["-gdwarf-4"])
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if env.dev_build:
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env.Append(CCFLAGS=["-g3"])
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else:
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env.Append(CCFLAGS=["-g2"])
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if env["debug_paths_relative"]:
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# Remap absolute paths to relative paths for debug symbols.
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project_path = Dir("#").abspath
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env.Append(CCFLAGS=[f"-ffile-prefix-map={project_path}=."])
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else:
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if methods.using_clang(env) and not methods.is_vanilla_clang(env):
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# Apple Clang, its linker doesn't like -s.
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env.Append(LINKFLAGS=["-Wl,-S", "-Wl,-x", "-Wl,-dead_strip"])
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else:
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env.Append(LINKFLAGS=["-s"])
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if env["optimize"] == "speed":
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env.Append(CCFLAGS=["-O3"])
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# `-O2` is friendlier to debuggers than `-O3`, leading to better crash backtraces.
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elif env["optimize"] == "speed_trace":
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env.Append(CCFLAGS=["-O2"])
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elif env["optimize"] == "size":
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env.Append(CCFLAGS=["-Os"])
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elif env["optimize"] == "debug":
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env.Append(CCFLAGS=["-Og"])
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elif env["optimize"] == "none":
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env.Append(CCFLAGS=["-O0"])
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# Needs to happen after configure to handle "auto".
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if env["lto"] != "none":
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print("Using LTO: " + env["lto"])
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# Set our C and C++ standard requirements.
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# C++17 is required as we need guaranteed copy elision as per GH-36436.
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# Prepending to make it possible to override.
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# This needs to come after `configure`, otherwise we don't have env.msvc.
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if not env.msvc:
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# Specifying GNU extensions support explicitly, which are supported by
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# both GCC and Clang. Both currently default to gnu11 and gnu++14.
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env.Prepend(CFLAGS=["-std=gnu11"])
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env.Prepend(CXXFLAGS=["-std=gnu++17"])
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else:
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# MSVC doesn't have clear C standard support, /std only covers C++.
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# We apply it to CCFLAGS (both C and C++ code) in case it impacts C features.
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env.Prepend(CCFLAGS=["/std:c++17"])
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# Disable exception handling. Godot doesn't use exceptions anywhere, and this
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# saves around 20% of binary size and very significant build time (GH-80513).
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