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Set ALLOW_MEMORY_GROWTH in the Emscripten build.

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How embarrassing. When I updated the Emscripten build to use WASM, a
major reason I bothered to do it at all was that I'd heard that WASM
was capable of reallocating its memory arena larger on the fly. Turns
out that it _can_, but only if you specifically set the option in
Emscripten to allow it.

With this option set, I can finish a 25x25 Galaxies, where previously
the game would crash part way through (and not even a very large part)
with errors about memory growth in the Javascript console.
This commit is contained in:
Simon Tatham
2021-04-16 18:07:15 +01:00
parent f8b15bab6b
commit 8fa545c76c
1 changed files with 1 additions and 0 deletions
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cmake/platforms/emscripten.cmake
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@ -30,6 +30,7 @@ list(TRANSFORM emcc_export_list PREPEND \")
list(TRANSFORM emcc_export_list APPEND \") list(TRANSFORM emcc_export_list APPEND \")
string(JOIN "," emcc_export_string ${emcc_export_list}) string(JOIN "," emcc_export_string ${emcc_export_list})
set(CMAKE_C_LINK_FLAGS "\ set(CMAKE_C_LINK_FLAGS "\
-s ALLOW_MEMORY_GROWTH=1 \
-s EXPORTED_FUNCTIONS='[${emcc_export_string}]' \ -s EXPORTED_FUNCTIONS='[${emcc_export_string}]' \
-s EXTRA_EXPORTED_RUNTIME_METHODS='[cwrap,callMain]'") -s EXTRA_EXPORTED_RUNTIME_METHODS='[cwrap,callMain]'")