[OpenMP] Fix building for 32-bit DragonFly, NetBSD, OpenBSD (#70527)

Fixing ```#error "Unknown or unsupported OS"```

(cherry picked from commit 223852aecf3f01cea21c40ea128a26f6a194345d)

diff --git a/openmp/runtime/src/kmp_runtime.cpp b/openmp/runtime/src/kmp_runtime.cpp
index e55798d..c63bd1c 100644 (file)
--- a/openmp/runtime/src/kmp_runtime.cpp
+++ b/openmp/runtime/src/kmp_runtime.cpp
@@ -8858,7 +8858,8 @@ __kmp_determine_reduction_method(
 
 #elif KMP_ARCH_X86 || KMP_ARCH_ARM || KMP_ARCH_AARCH || KMP_ARCH_MIPS
 
-#if KMP_OS_LINUX || KMP_OS_FREEBSD || KMP_OS_WINDOWS || KMP_OS_HURD
+#if KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD ||     \
+    KMP_OS_OPENBSD || KMP_OS_WINDOWS || KMP_OS_HURD
 
     // basic tuning