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51 lines
2 KiB
Diff
51 lines
2 KiB
Diff
From c3fda489cfdb2260f9fec706e6fd7259858c4467 Mon Sep 17 00:00:00 2001
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From: Tom Honermann <tom@honermann.net>
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Date: Sun, 24 Jul 2022 01:11:43 -0400
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Subject: [PATCH 01/15] stdlib: Suppress gcc diagnostic that char8_t is a
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keyword in C++20 in uchar.h.
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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gcc 13 issues the following diagnostic for the uchar.h header when the
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-Wc++20-compat option is enabled in C++ modes that do not enable char8_t
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as a builtin type (C++17 and earlier by default; subject to _GNU_SOURCE
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and the gcc -f[no-]char8_t option).
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warning: identifier ‘char8_t’ is a keyword in C++20 [-Wc++20-compat]
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This change modifies the uchar.h header to suppress the diagnostic through
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the use of '#pragma GCC diagnostic' directives for gcc 10 and later (the
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-Wc++20-compat option was added in gcc version 10). Unfortunately, a bug
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in gcc currently prevents those directives from having the intended effect
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as reported at https://gcc.gnu.org/PR106423. A patch for that issue has
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been submitted and is available in the email thread archive linked below.
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https://gcc.gnu.org/pipermail/gcc-patches/2022-July/598736.html
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(cherry picked from commit 825f84f133bd840347dc49229b6d831f07d04775)
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---
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wcsmbs/uchar.h | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/wcsmbs/uchar.h b/wcsmbs/uchar.h
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index c37e8619a0..5f7139f279 100644
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--- a/wcsmbs/uchar.h
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+++ b/wcsmbs/uchar.h
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@@ -34,8 +34,16 @@
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/* Declare the C2x char8_t typedef in C2x modes, but only if the C++
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__cpp_char8_t feature test macro is not defined. */
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#if __GLIBC_USE (ISOC2X) && !defined __cpp_char8_t
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+#if __GNUC_PREREQ (10, 0) && defined __cplusplus
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+/* Suppress the diagnostic regarding char8_t being a keyword in C++20. */
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+# pragma GCC diagnostic push
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+# pragma GCC diagnostic ignored "-Wc++20-compat"
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+#endif
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/* Define the 8-bit character type. */
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typedef unsigned char char8_t;
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+#if __GNUC_PREREQ (10, 0) && defined __cplusplus
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+# pragma GCC diagnostic pop
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+#endif
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#endif
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#ifndef __USE_ISOCXX11
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--
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2.37.2
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