[libcxx-commits] [libcxx] [libc++][AIX] Support file offsets larger than 2GB in basic_filebuf on 32-bit (PR #215892)

[Hubert Tong via libcxx-commits]

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@@ -217,6 +217,20 @@ typedef basic_fstream<wchar_t> wfstream;
 #      pragma GCC system_header
 #    endif
 
+#    if defined(_AIX) || (defined(__linux__) && defined(__GLIBC__))
+#      define _LIBCPP_HAS_LARGEFILE_API 1
+#    else
+#      define _LIBCPP_HAS_LARGEFILE_API 0
+#    endif
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hubert-reinterpretcast wrote:

It might be better to have the value of this be set by the `__config` header based on CMake tests for the symbol names during the build. I don't know what the preference of the libc++ maintainers would be though.

https://github.com/llvm/llvm-project/pull/215892