Avoid AbslHashValue for std::filesystem::path when <filesystem> is not included

PiperOrigin-RevId: 584675181 Change-Id: I78c9a29055327c84f1e78b8440221439839a041c

Avoid AbslHashValue for std::filesystem::path when <filesystem> is not included
PiperOrigin-RevId: 584675181 Change-Id: I78c9a29055327c84f1e78b8440221439839a041c
2fca6417 · Abseil Team · Copybara-Service · db5c7993 · 2fca6417
Commit 2fca6417 authored Nov 22, 2023 by Abseil Team Committed by Copybara-Service Nov 22, 2023
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absl/hash/internal/hash.h
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--- a/absl/hash/internal/hash.h
+++ b/absl/hash/internal/hash.h
@@ -589,6 +589,7 @@ H AbslHashValue(H hash_state, std::basic_string_view<Char> str) {
 #endif  // ABSL_HAVE_STD_STRING_VIEW

 #if defined(__cpp_lib_filesystem) && __cpp_lib_filesystem >= 201703L && \
+    !defined(_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY) && \
    (!defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) ||        \
     __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ >= 130000)