libstdcxx: don’t set stdlib automatically #54614
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We don’t need to set -stdlib=libstdc++. This only works on Clang so it is not good to set it globally. In addition, Clang knows to use libstdc++ on Linux by default if no stdlib is set: https://github.com/llvm-mirror/clang/blob/324f918438715b4a0d024af5930628c1674f4fcd/lib/Driver/ToolChains/Linux.cpp#L456 It’s a good policy to just leave off stdlib for now. Fixes NixOS#29877.
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We don’t need to set -stdlib=libstdc++. This only works on Clang so it
is not good to set it globally. In addition, Clang knows to use
libstdc++ on Linux by default if no stdlib is set:
https://github.com/llvm-mirror/clang/blob/324f918438715b4a0d024af5930628c1674f4fcd/lib/Driver/ToolChains/Linux.cpp#L456
It’s a good policy to just leave off stdlib for now.
Fixes #29877.