tcg: Add WebAssembly backend

[PATCH 32/33] meson: Propagate optimization flag for linking on Emscripten

Kohei Tokunaga posted 33 patches 6 months, 4 weeks ago

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Maintainers: "Alex Bennée" <alex.bennee@linaro.org>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Thomas Huth <thuth@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Paolo Bonzini <pbonzini@redhat.com>, "Marc-André Lureau" <marcandre.lureau@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, WANG Xuerui <git@xen0n.name>, Aurelien Jarno <aurelien@aurel32.net>, Huacai Chen <chenhuacai@kernel.org>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Aleksandar Rikalo <arikalo@gmail.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <Alistair.Francis@wdc.com>, Stefan Weil <sw@weilnetz.de>, Kohei Tokunaga <ktokunaga.mail@gmail.com>

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[PATCH 32/33] meson: Propagate optimization flag for linking on Emscripten

Posted by Kohei Tokunaga 6 months, 4 weeks ago

Emscripten uses the optimization flag at link time to enable optimizations
via Binaryen [1]. While meson.build currently recognizes the -Doptimization
option, it does not propagate it to the linking. This commit updates
meson.build to propagate the optimization flag to the linking when targeting
WebAssembly.

[1] https://emscripten.org/docs/optimizing/Optimizing-Code.html#how-emscripten-optimizes

Signed-off-by: Kohei Tokunaga <ktokunaga.mail@gmail.com>
---
 meson.build | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/meson.build b/meson.build
index f6ed867819..91e182092d 100644
--- a/meson.build
+++ b/meson.build
@@ -869,6 +869,10 @@ elif host_os == 'openbsd'
     # Disable OpenBSD W^X if available
     emulator_link_args = cc.get_supported_link_arguments('-Wl,-z,wxneeded')
   endif
+elif host_os == 'emscripten'
+  if get_option('optimization') != 'plain'
+    emulator_link_args += ['-O' + get_option('optimization')]
+  endif
 endif
 
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-- 
2.43.0