[PATCH] D117888: [clang][driver][wasm] Support -stdlib=libstdc++ for WebAssembly

[Sam Clegg via Phabricator via cfe-commits]

sbc100 added inline comments.


================
Comment at: clang/lib/Driver/ToolChains/WebAssembly.cpp:448
+    addSystemInclude(DriverArgs, CC1Args,
+                     getDriver().SysRoot + "/include/c++/11");
+    break;
----------------
tbaeder wrote:
> sbc100 wrote:
> > Where does `11` come from here?  Do other drivers hardcode this the same way?
> `11` is just the current version. `lib/Driver/ToolChains/Gnu.cpp` figures out the correct version here via `GCCInstallationDetector`. I thought hard-coding is find for wasm because the `v1` for libc++ above is also hardcoded and `Gnu.cpp` figures that out dynamically as well (in `addLibCxxIncludePaths`).
I'd rather not hardcode that current version, that seems rather fragile/wrong.

I agree the `v1` is probably also wrong (feel free to add a TODO or update that too).



Repository:
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CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D117888/new/

https://reviews.llvm.org/D117888