https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121201
Bug ID: 121201
Summary: genpreds uses deprecated rawmemchr, breaks build on
musl based system
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: dkm at gcc dot gnu.org
Target Milestone: ---
Since r16-2374-ga51c146ebce41b
commit a51c146ebce41b5e4326b222f2d9e04bb22d276f
Author: Stefan Schulze Frielinghaus <stefa...@gcc.gnu.org>
Date: Mon Jul 21 13:05:26 2025 +0200
Hard register constraints
There's:
```
puts (" default: break;\n"
" }\n"
" if (str[0] == '{')\n"
" return ((const char *) rawmemchr (str + 1, '}') - str) + 1;\n"
" return 1;\n"
"}\n");
```
rawmemchr is marked as deprecated on glibc and does not even exist on musl.
A build on alpine linux gives:
```
In file included from ./tm_p.h:6,
from build/gencondmd.cc:29:
./tm-preds.h: In function 'size_t insn_constraint_len(char, const char*)':
./tm-preds.h:432:30: error: 'rawmemchr' was not declared in this scope; did you
mean 'wmemchr'?
432 | return ((const char *) rawmemchr (str + 1, '}') - str) + 1;
| ^~~~~~~~~
| wmemchr
make[2]: *** [Makefile:3204: build/gencondmd.o] Error 1
```
