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From https://github.com/podofo/podofo/commit/aa9267229b40b49e5927f286841be4cbe81d05d5.patch Mon Sep 17 00:00:00 2001
From: Yao Zi <ziyao@disroot.org>
Date: Sun, 22 Jun 2025 07:02:49 +0000
Subject: [PATCH] private: charconv: Don't define from_chars for libc++ 20 or
later
LLVM libc++ starts to provide a float-point-capable std::from_chars()
since LLVM 20 release[1]. Unconditionally defining from_chars() when
using Clang will cause ambiguous references and fails the build.
Link: https://github.com/llvm/llvm-project/pull/91651 # [1]
Signed-off-by: Yao Zi <ziyao@disroot.org>
--- a/src/podofo/private/charconv_compat.h
+++ b/src/podofo/private/charconv_compat.h
@@ -7,7 +7,7 @@
#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 10
#define WANT_CHARS_FORMAT
#endif
-#if (defined(__GNUC__) && __GNUC__ < 11) || defined(__clang__)
+#if (defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 11) || (defined(__clang__) && defined(_LIBCPP_VERSION) && (_LIBCPP_VERSION < 200000))
#define WANT_FROM_CHARS
#endif
#if (defined(__GNUC__) && !defined(__clang__) && !defined(__MINGW32__) && __GNUC__ < 11) || (defined(__MINGW32__) && __GNUC__ < 12) || (defined(__clang__) && ((defined(__apple_build_version__) && __apple_build_version__ < 15000000) || __clang_major__ < 14))
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