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[libcxx] Use the allocating form of getcwd() on Glibc and Apple platforms

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This avoids having to query pathconf for a max size for
preallocating a buffer for the return value.

This is an extension to the POSIX getcwd() spec.

Differential Revision: https://reviews.llvm.org/D97460
This commit is contained in:
Martin Storsjö 2021-02-25 14:12:46 +02:00
parent fb2e4f5401
commit c7d46f221e
1 changed files with 1 additions and 1 deletions
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libcxx/src/filesystem/operations.cpp
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@ -1095,7 +1095,7 @@ void __create_symlink(path const& from, path const& to, error_code* ec) {
path __current_path(error_code* ec) {
ErrorHandler<path> err("current_path", ec);
#if defined(_LIBCPP_WIN32API)
#if defined(_LIBCPP_WIN32API) || defined(__GLIBC__) || defined(__APPLE__)
// Common extension outside of POSIX getcwd() spec, without needing to
// preallocate a buffer. Also supported by a number of other POSIX libcs.
int size = 0;