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Update SCons link-time optimization option for 3.5 and later

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This commit is contained in:
Hugo Locurcio
2023-06-30 12:58:08 +02:00
parent c5b747f40d
commit b169cc2a4a
4 changed files with 5 additions and 10 deletions
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2
development/compiling/compiling_for_windows.rst
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@@ -151,7 +151,7 @@ dependencies. Running it will bring up the Project Manager.
SCons option ``target=release_debug``.
If you are compiling Godot with MinGW, you can make the binary
even smaller and faster by adding the SCons option ``use_lto=yes``.
even smaller and faster by adding the SCons option ``lto=full``.
As link-time optimization is a memory-intensive process,
this will require about 7 GB of available RAM while compiling.

2
development/compiling/compiling_for_x11.rst
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@@ -129,7 +129,7 @@ manager.
SCons option ``target=release_debug``.
If you are compiling Godot with GCC, you can make the binary
even smaller and faster by adding the SCons option ``use_lto=yes``.
even smaller and faster by adding the SCons option ``lto=full``.
As link-time optimization is a memory-intensive process,
this will require about 7 GB of available RAM while compiling.

2
development/compiling/optimizing_for_size.rst
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@@ -79,7 +79,7 @@ and MSVC compilers:
::
scons p=windows target=release tools=no use_lto=yes
scons p=windows target=release tools=no lto=full
Linking becomes much slower and more RAM-consuming with this option,
so it should be used only for release builds:

9
development/cpp/using_cpp_profilers.rst
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@@ -29,13 +29,8 @@ To get useful profiling information, it is **absolutely required** to use a Godo
build that includes debugging symbols. Official binaries do not include debugging
symbols, since these would make the download size significantly larger.
To get profiling data that best matches the production environment, you should
compile binaries with the following SCons options:
- For editor binaries: ``target=release_debug use_lto=yes``
- For debug export templates: ``target=release_debug use_lto=yes``
- For release export templates: ``tools=no target=release debug_symbols=yes``
- ``debug_symbols=yes`` is required as export templates are stripped from debugging symbols by default.
To get profiling data that best matches the production environment (but with debugging symbols),
you should compile binaries with the ``production=yes debug_symbols=yes`` SCons options.
It is possible to run a profiler on less optimized builds (e.g. ``target=debug`` without LTO),
but results will naturally be less representative of real world conditions.