[gcc r15-9423] libstdc++: Use UTF-32BE as wide encoding for big-endian machines [PR119725]

[Tomasz Kaminski]

https://gcc.gnu.org/g:c2f1dda34defe739db6016dda97a6516243372e6

commit r15-9423-gc2f1dda34defe739db6016dda97a6516243372e6
Author: Tomasz Kamiński <tkaminsk@redhat.com>
Date:   Mon Apr 14 08:43:58 2025 +0200

    libstdc++: Use UTF-32BE as wide encoding for big-endian machines [PR119725]
    
    This changes the `dg-options` line so UTF-32 with byte order native to the
    machine is used as wide encoding.
    
    We still do not handle mismatch in the byte order of the Unicode encodings
    (UTF32-BE on little-endian machines). This would require larger changes,
    as for example `unicode-data.h` tables are encoded with native byte order.
    
            PR libstdc++/119725
    
    libstdc++-v3/ChangeLog:
    
            * testsuite/std/format/debug.cc: Updated dg-options.
            * testsuite/std/format/debug_nonunicode.cc: Updated dg-options.
    
    Reviewed-by: Jonathan Wakely <jwakely@redhat.com>
    Signed-off-by: Tomasz Kamiński <tkaminsk@redhat.com>

Diff:
---
 libstdc++-v3/testsuite/std/format/debug.cc            | 3 ++-
 libstdc++-v3/testsuite/std/format/debug_nonunicode.cc | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/libstdc++-v3/testsuite/std/format/debug.cc b/libstdc++-v3/testsuite/std/format/debug.cc
index 07cd1e0e349e..71bb7f4a0fe8 100644
--- a/libstdc++-v3/testsuite/std/format/debug.cc
+++ b/libstdc++-v3/testsuite/std/format/debug.cc
@@ -1,4 +1,5 @@
-// { dg-options "-fexec-charset=UTF-8 -fwide-exec-charset=UTF-32LE -DUNICODE_ENC" }
+// { dg-options "-fexec-charset=UTF-8 -fwide-exec-charset=UTF-32LE -DUNICODE_ENC" { target le } }
+// { dg-options "-fexec-charset=UTF-8 -fwide-exec-charset=UTF-32BE -DUNICODE_ENC" { target be } }
 // { dg-do run { target c++23 } }
 // { dg-add-options no_pch }
 
diff --git a/libstdc++-v3/testsuite/std/format/debug_nonunicode.cc b/libstdc++-v3/testsuite/std/format/debug_nonunicode.cc
index 5c03171d71a1..2ac7e757ea8d 100644
--- a/libstdc++-v3/testsuite/std/format/debug_nonunicode.cc
+++ b/libstdc++-v3/testsuite/std/format/debug_nonunicode.cc
@@ -1,4 +1,4 @@
-// { dg-options "-fexec-charset=ISO8859-1 -fwide-exec-charset=UTF-32LE" }
+// { dg-options "-fexec-charset=ISO8859-1" }
 // { dg-do run { target c++23 } }
 // { dg-add-options no_pch }