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Add known issues about the fact that the toolchain by default targets Vista or newer

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Martin Storsjö committed 2018-09-05 13:39:28 +03:00
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@@ -72,6 +72,15 @@ normal GCC/binutils based MinGW.
- The DLL version of libc++ doesn't have a fixed supported ABI, so in theory, - The DLL version of libc++ doesn't have a fixed supported ABI, so in theory,
code built against an older version of the DLL is not guaranteed to work code built against an older version of the DLL is not guaranteed to work
with a newer version of the DLL. with a newer version of the DLL.
- The toolchain defaults to using the Universal CRT (which is only available
out of the box since Windows 10, but can be installed on Vista or newer)
and defaults to targeting Vista. These defaults can be changed in
`build-mingw-w64.sh` though.
- The toolchain uses Windows native TLS support, which doesn't work properly
until Windows Vista. This has no effect on code not using thread local
variables.
- The runtime libraries libunwind, libcxxabi and libcxx also assume that the
target is Vista or newer.
Additionally, one may run into other minor differences between GCC and clang. Additionally, one may run into other minor differences between GCC and clang.