[Openmp-commits] [openmp] b32c6d1 - [OpenMP] Fix KMP_OS_AIX handling (#138499)
via Openmp-commits
openmp-commits at lists.llvm.org
Mon May 5 11:57:45 PDT 2025
Author: Rainer Orth
Date: 2025-05-05T20:57:41+02:00
New Revision: b32c6d18a458d8a4d18f5b3efa5a9d7ffb2abba9
URL: https://github.com/llvm/llvm-project/commit/b32c6d18a458d8a4d18f5b3efa5a9d7ffb2abba9
DIFF: https://github.com/llvm/llvm-project/commit/b32c6d18a458d8a4d18f5b3efa5a9d7ffb2abba9.diff
LOG: [OpenMP] Fix KMP_OS_AIX handling (#138499)
When building `openmp` on Linux/sparc64, I get
```
In file included fromopenmp/runtime/src/kmp_utility.cpp:16:
openmp/runtime/src/kmp_wrapper_getpid.h:47:2: warning: No gettid found, use getpid instead [-W#warnings]
47 | #warning No gettid found, use getpid instead
| ^
```
This is highly confusing since `<sys/syscall.h>` **does** define
`SYS_gettid` and the header is supposed to be included:
```
#if !defined(KMP_OS_AIX) && !defined(KMP_OS_HAIKU)
#include <sys/syscall.h>
#endif
```
However, this actually is **not** the case for two reasons:
- `KMP_OS_HAIKU` is always defined, either as 1 on Haiku or as 0
otherwise.
- `KMP_OS_AIX` is even worse: it is only defined as 1 on on AIX, but
undefined otherwise.
All those `KMP_OS_*` macros are supposed to always be defined as 1/0 as
appropriate, and to be checked with `#if`, not `#ifdef`. AIX is
violating this, causing the problem above.
Other targets probably get `<sys/syscall.h>` indirectly otherwise, but
Linux/sparc64 does not.
This patch fixes this by also defining `KMP_OS_AIX` as 0 on other OSes
and changing the checks to `#if` as necessary.
Tested on `sparc64-unknown-linux-gnu`, `sparcv9-sun-solaris2.11`,
`amd64-pc-solaris2.11`, and `x86_64-pc-linux-gnu`.
Added:
Modified:
openmp/runtime/src/kmp.h
openmp/runtime/src/kmp_affinity.cpp
openmp/runtime/src/kmp_platform.h
openmp/runtime/src/kmp_wrapper_getpid.h
Removed:
################################################################################
diff --git a/openmp/runtime/src/kmp.h b/openmp/runtime/src/kmp.h
index d5d667c32c643..a2cacc8792b15 100644
--- a/openmp/runtime/src/kmp.h
+++ b/openmp/runtime/src/kmp.h
@@ -821,7 +821,7 @@ class KMPAffinity {
typedef KMPAffinity::Mask kmp_affin_mask_t;
extern KMPAffinity *__kmp_affinity_dispatch;
-#ifndef KMP_OS_AIX
+#if !KMP_OS_AIX
class kmp_affinity_raii_t {
kmp_affin_mask_t *mask;
bool restored;
diff --git a/openmp/runtime/src/kmp_affinity.cpp b/openmp/runtime/src/kmp_affinity.cpp
index f2520db145552..a6065fe792d55 100644
--- a/openmp/runtime/src/kmp_affinity.cpp
+++ b/openmp/runtime/src/kmp_affinity.cpp
@@ -5468,7 +5468,7 @@ void __kmp_affinity_bind_init_mask(int gtid) {
__kmp_set_system_affinity(th->th.th_affin_mask, FALSE);
} else
#endif
-#ifndef KMP_OS_AIX
+#if !KMP_OS_AIX
// Do not set the full mask as the init mask on AIX.
__kmp_set_system_affinity(th->th.th_affin_mask, TRUE);
#endif
diff --git a/openmp/runtime/src/kmp_platform.h b/openmp/runtime/src/kmp_platform.h
index 80afba6c6af2e..609b7c4688842 100644
--- a/openmp/runtime/src/kmp_platform.h
+++ b/openmp/runtime/src/kmp_platform.h
@@ -27,6 +27,7 @@
#define KMP_OS_SOLARIS 0
#define KMP_OS_WASI 0
#define KMP_OS_EMSCRIPTEN 0
+#define KMP_OS_AIX 0
#define KMP_OS_UNIX 0 /* disjunction of KMP_OS_LINUX, KMP_OS_DARWIN etc. */
#ifdef _WIN32
@@ -163,11 +164,11 @@
#undef KMP_ARCH_PPC64_ELFv1
#define KMP_ARCH_PPC64_ELFv1 1
#endif
-#elif defined KMP_OS_AIX
+#elif KMP_OS_AIX
#undef KMP_ARCH_PPC64_XCOFF
#define KMP_ARCH_PPC64_XCOFF 1
#endif
-#elif defined(__powerpc__) && defined(KMP_OS_AIX)
+#elif defined(__powerpc__) && KMP_OS_AIX
#undef KMP_ARCH_PPC_XCOFF
#define KMP_ARCH_PPC_XCOFF 1
#undef KMP_ARCH_PPC
diff --git a/openmp/runtime/src/kmp_wrapper_getpid.h b/openmp/runtime/src/kmp_wrapper_getpid.h
index 6b41dfcc20880..c6c7ac01799a0 100644
--- a/openmp/runtime/src/kmp_wrapper_getpid.h
+++ b/openmp/runtime/src/kmp_wrapper_getpid.h
@@ -17,7 +17,7 @@
// On Unix-like systems (Linux* OS and OS X*) getpid() is declared in standard
// headers.
-#if !defined(KMP_OS_AIX) && !defined(KMP_OS_HAIKU)
+#if !KMP_OS_AIX && !KMP_OS_HAIKU
#include <sys/syscall.h>
#endif
#include <sys/types.h>
More information about the Openmp-commits
mailing list