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SCons: Pass optimization flags to the linker too, needed by Emscripten #94109

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merged 1 commit into from
Jul 10, 2024

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@akien-mga akien-mga commented Jul 8, 2024

Needs testing with various compilers to confirm that it doesn't have a negative impact / cause errors to pass those to the linker for MSVC, GCC, and Clang.

From a quick test with GCC, both with and without LTO, it didn't seem to make a difference in my tests.

@akien-mga akien-mga added bug topic:buildsystem cherrypick:3.x Considered for cherry-picking into a future 3.x release cherrypick:3.5 Considered for cherry-picking into a future 3.5.x release cherrypick:4.1 Considered for cherry-picking into a future 4.1.x release cherrypick:4.2 Considered for cherry-picking into a future 4.2.x release labels Jul 8, 2024
@akien-mga akien-mga added this to the 4.3 milestone Jul 8, 2024
@akien-mga akien-mga requested a review from a team as a code owner July 8, 2024 23:18
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Repiteo commented Jul 9, 2024

Doesn't look like the MSVC linker can use the optimization flags

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Doesn't look like the MSVC linker can use the optimization flags

I tried to use ChatGPT as a "read tech docs for me and summarize it", but sounds like I wasn't critical enough of its claim that those flags impact MSVC whole-program optimization :P

@akien-mga akien-mga force-pushed the scons-linker-optflags branch from ddc442d to 7d70862 Compare July 9, 2024 07:34
@akien-mga akien-mga merged commit 543f694 into godotengine:master Jul 10, 2024
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@akien-mga akien-mga deleted the scons-linker-optflags branch July 10, 2024 22:29
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Just pointing out the regression in #94725 for myself, so I don't cherry-pick this change before we've solved that too.

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bug cherrypick:3.x Considered for cherry-picking into a future 3.x release cherrypick:3.5 Considered for cherry-picking into a future 3.5.x release cherrypick:4.1 Considered for cherry-picking into a future 4.1.x release cherrypick:4.2 Considered for cherry-picking into a future 4.2.x release topic:buildsystem
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Web build/Emscripten needs optimization flags passed to the linker too (LINKFLAGS)
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