On 11/16/24 05:23, Bruno Haible wrote:
What is this line meant to test?
- Support for hex escapes in UTF-8 string literals?
- Comparison of bool values against int values?
The former. Thanks for reporting that; I installed the attached.
From 69d4a320a06e158d2f1e5df678186f2e84a9f6d2 Mon Sep 17 00:00:00 2001
From: Paul Eggert <[email protected]>
Date: Sat, 16 Nov 2024 11:51:23 -0800
Subject: [PATCH] std-gnu23: pacify GCC 15
MIME-Version: 1.0
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Problem reported by Bruno Haible in:
https://lists.gnu.org/r/bug-gnulib/2024-11/msg00140.html
* m4/std-gnu23.m4 (_AC_C_C23_TEST_GLOBALS): Add parens.
While we’re at it, use sizeof so that the expression is a
conforming integer constant expression.
---
ChangeLog | 9 +++++++++
m4/std-gnu23.m4 | 6 ++++--
2 files changed, 13 insertions(+), 2 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index b66fe3f4ca..c33d652b07 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2024-11-16 Paul Eggert <[email protected]>
+
+ std-gnu23: pacify GCC 15
+ Problem reported by Bruno Haible in:
+ https://lists.gnu.org/r/bug-gnulib/2024-11/msg00140.html
+ * m4/std-gnu23.m4 (_AC_C_C23_TEST_GLOBALS): Add parens.
+ While we’re at it, use sizeof so that the expression is a
+ conforming integer constant expression.
+
2024-11-16 Bruno Haible <[email protected]>
calloc-gnu: Fix bug on 32-bit AIX (regression 2024-11-04).
diff --git a/m4/std-gnu23.m4 b/m4/std-gnu23.m4
index cebf62d283..5b088d2966 100644
--- a/m4/std-gnu23.m4
+++ b/m4/std-gnu23.m4
@@ -1,5 +1,5 @@
# std-gnu23.m4
-# serial 2
+# serial 3
# Prefer GNU C23 to earlier versions.
@@ -425,7 +425,9 @@ int function_with_unnamed_parameter (int) { return 0; }
void c23_noreturn ();
-bool use_u8 = !u8"\xFF" == u8'\''x'\'';
+/* Test parsing of string and char UTF-8 literals (including hex escapes).
+ The parens pacify GCC 15. */
+bool use_u8 = (!sizeof u8"\xFF") == (!u8'\''x'\'');
bool check_that_bool_works = true | false | !nullptr;
#if !true
--
2.34.1
