<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/125566>125566</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            compiler-rt: build fix for NetBSD-10.99.12
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          0-wiz-0
      </td>
    </tr>
</table>

<pre>
    In [this commit](https://github.com/NetBSD/src/commit/16543c49052c820334cffc5c69b2afde18f02458), `__lwp_getprivate_fast()` was moved to a new arch-specific header file.
This breaks the build of compiler-rt:
```
FAILED: lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_linux_libcdep.cpp.o
/scratch/lang/compiler-rt/work/.cwrapper/bin/c++ -DHAVE_RPC_XDR_H=0 -I/scratch/lang/compiler-rt/work/compiler-rt-18.1.8.src/lib/sanitizer_common/.. -O2 -g -fstack-clash-protection -I/usr/pkg/include -I/usr/include -I/usr/pkg/include/python3.13 -Wall -Wno-unused-parameter -DNDEBUG -std=c++17 -m64 -fPIC -fno-builtin -fno-exceptions -fomit-frame-pointer -funwind-tables -fno-stack-protector -fvisibility=hidden -fno-lto -O3 -g -Wno-variadic-macros -nostdinc++ -Wno-format -fno-rtti -Wframe-larger-than=570 -MD -MT lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_linux_libcdep.cpp.o -MF lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_linux_libcdep.cpp.o.d -o lib/sanitizer_common/CMakeFiles/RTSanitizerCommonLibc.x86_64.dir/sanitizer_linux_libcdep.cpp.o -c /scratch/lang/compiler-rt/work/compiler-rt-18.1.8.src/lib/sanitizer_common/sanitizer_linux_libcdep.cpp
/scratch/lang/compiler-rt/work/compiler-rt-18.1.8.src/lib/sanitizer_common/sanitizer_linux_libcdep.cpp: In function 'tls_tcb* __sanitizer::ThreadSelfTlsTcb()':
/scratch/lang/compiler-rt/work/compiler-rt-18.1.8.src/lib/sanitizer_common/sanitizer_linux_libcdep.cpp:452:27: error: '__lwp_getprivate_fast' was not declared in this scope; did you mean '_lwp_getprivate'?
  452 |   tcb = (struct tls_tcb *)__lwp_getprivate_fast();
      | ^~~~~~~~~~~~~~~~~~~~~
      | _lwp_getprivate
```

The fix is to include the new header `machine/lwp_private.h`. A tentative patch that fixes the build looks like this:

```
--- lib/sanitizer_common/sanitizer_linux_libcdep.cpp.orig 2024-06-15 17:21:32.000000000 +0000
+++ lib/sanitizer_common/sanitizer_linux_libcdep.cpp
@@ -29,7 +29,13 @@
 # include "sanitizer_solaris.h"

 #  if SANITIZER_NETBSD
-#    define _RTLD_SOURCE  // for __lwp_gettcb_fast() / __lwp_getprivate_fast()
+#    // for __lwp_gettcb_fast() / __lwp_getprivate_fast()
+#    include <sys/param.h>
+#    if defined(__NetBSD_Version__) && (__NetBSD_Version__ >= 1099001200)
+#      include <machine/lwp_private.h>
+#    else
+# define _RTLD_SOURCE
+#    endif
 #  endif

 #  include <dlfcn.h>  // for dlsym()
```
but I don't know the llvm codebase well enough, so I'd appreciate feedback.
</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzEV82O47gRfhr6UqBAkZZsH3yQW3bWwPwsur07QS4CRVIWY1oUSKo9vYc8e0BZ090eTDeSYDMrGJAlFr_6qlh_4t7rY6fUGmUblJUzPoTWujXBF_0HJrPayqf1vgOUbUKrPQh7PuuAshLRZRtC7xErEN0hujvq0A51IuwZ0d0nFTYPJaI77wSiu2kX3aV5NmdiviIZFUtKGJuLphGZyFc15Y1U6bIhdJ4tEV0hegcoJ1VlLn11VKF3-pEHVTXcB0RHiZzAhXs420clIVjg0KkLcCda7HsldKMFtIpL5aDRRiWIFIdoRO0UP3kIrYJ60EaCbaJhvTbKYReiSaRAOZl-pNgV-w_bErECjK6jVbzTQf-hXBUtsx2iu7uP_KR22iiP6O7-8PBN4m4U-KBrkXxd5lU-T6R2NxBGd8PXyuhaSNUnou8TG9XTnReOB9EiujO8O17d-MyR7i7WnRDdJeLieN-rCFrrSEUgukF0A7j8pfh9W93_elf9vbyvfkGsJID3_zHyq5c4XSZpskyux_mmE5IE8GcK-Ai48YGLExaG-xb3zgYlgrbdVf_gI9v-FFXrTphBqtcLP3h1Ixufn0JrO5akDPAXbgzgL53FQzd4JXHPHT-roBzg8lO53fz2N8A-SMTKyTXpAvA5nwNuft3fAW46i2MgBN1dH9RXofpI1wNu7FkH3ERE3FvdjbDN0F10J3HgtVH-uulq8GSqjUKP2utaGx2eECtbLaWa8E2wgD-z0VGR9yN3mkst8JkLZz3gzvogdfd8klGose7MwxXAhaABf7myMtwdlcOh5R1iZbYggD-WgD8eflK0Av64-0mqEgnY_jSzBPwfc-Ud3f9N-v-5ilkB-w6aobsmK6KLYHwVRI1oAVX1vDWWSFYcWqe4fFCmORh_iELXwr2YKuhfZcM8o4gVIw1QztlIN9ryRi9ZjF2kswGkEoY7JUF3MLY7L2yvENuA1BKe7ABnxUe3fIc02rxDpACYZxTQ4g4AgqgBsRIQXfrgBhFgciYgWiC6eq-1sc0IFq8IhrLtv35w3ch8T-m2hY29T0Gjv4L2sVl-K7KxC8a2OTVKlJMzF63uYpWNiBNc0qKcJFBAUF3gQT8q6OPRQmh5iLDqdUM11p48GH1Sox-neLhlhDF-O5PfzUynj0AJnWOS4zSDNB40TRErGE3ItwsQ3cT7GIibqZD-r9k4J2hOAI9TySIij_9SBteVeA6IsmefIkpfAL013GmftIjSqxdGWdANPBSf9of9P7b31aftIQ5MpMDjGoBUje4UVPeHD2X18Pm3-7stwHXSgsY6eA6eIOpXgRNF4L3Amrwx6viT4Z6tZ3f-KVbgsQ8nLWLbW7lmsk4iuqyq66xY_a6c17arqqvaHNEcfrgOEY-VkJLVipCUEvI9kRsqb0Xzd6SU8erlxQ-8fyvdSd08n-S3p5ejfVEvTSO6Ud2Nv6XxT-cXH75Ki3oIsAcZo3IR4NTZy5hXxjyeQVipau4VXJQxoDo7HNs4J3sLe0QXEnjfOyU0DwoapWTNxSmZyTWTK7biM7VOF2yZpzSj-axdr7JFxmW2yBrFarbiDVmulk0-XyyXrCHz1UyvKaEZoYSlqyyjedJk2UJJVZO5WOVM5WhO1Jlrk0R2iXXHmfZ-UOuUZlmezwyvlfHjlwWlscaMqzENsnLm1nETroejR3NitA_-BSboYNT6diafSkusYNGD17DAKUlWqySls8GZ9TtfJBF6usUZ7Z9KxAY0EoqhOjF-XNN_BwAA___euDPF">