[gcc r16-3477] libstdc++: Fix bootstrap failures in src/c++26/debugging.cc

[Jonathan Wakely]

https://gcc.gnu.org/g:fb80a5f4c33188a87e852c1725e57a65b4645615

commit r16-3477-gfb80a5f4c33188a87e852c1725e57a65b4645615
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Sun Aug 31 10:11:25 2025 +0100

    libstdc++: Fix bootstrap failures in src/c++26/debugging.cc
    
    ptrace on Darwin requires <sys/types.h>.
    
    The inline x86 asm doesn't work with the Solaris assembler.
    
    libstdc++-v3/ChangeLog:
    
            * src/c++26/debugging.cc [_GLIBCXX_HAVE_SYS_PTRACE_H]: Include
            <sys/types.h>.
            (breakpoint) [__i386__ || __x86_64__]: Use "int 0x03" instead of
            "int3".

Diff:
---
 libstdc++-v3/src/c++26/debugging.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libstdc++-v3/src/c++26/debugging.cc b/libstdc++-v3/src/c++26/debugging.cc
index 72e305d3272b..c6262db73f44 100644
--- a/libstdc++-v3/src/c++26/debugging.cc
+++ b/libstdc++-v3/src/c++26/debugging.cc
@@ -33,6 +33,7 @@
 #endif
 
 #if _GLIBCXX_HAVE_SYS_PTRACE_H
+# include <sys/types.h> // for darwin ptrace
 # include <sys/ptrace.h>
 # include <errno.h>
 #endif
@@ -138,7 +139,7 @@ std::breakpoint() noexcept
   __builtin_debugtrap(); // Clang
 #elif defined(__i386__) || defined(__x86_64__)
   // nop is for GDB, see https://sourceware.org/bugzilla/show_bug.cgi?id=31194
-  __asm__ volatile ("int3\n\tnop");
+  __asm__ volatile ("int $0x3\n\tnop");
 #elifdef __thumb__
   __asm__ volatile (".inst 0xde01");
 #elifdef __aarch64__