Index: cmake/config-ix.cmake
===================================================================
--- cmake/config-ix.cmake
+++ cmake/config-ix.cmake
@@ -586,7 +586,7 @@
 endif()
 
 if (PROFILE_SUPPORTED_ARCH AND NOT LLVM_USE_SANITIZER AND
-    OS_NAME MATCHES "Darwin|Linux|FreeBSD|Windows|Android|Fuchsia|SunOS")
+    OS_NAME MATCHES "Darwin|Linux|FreeBSD|Windows|Android|Fuchsia|SunOS|NetBSD")
   set(COMPILER_RT_HAS_PROFILE TRUE)
 else()
   set(COMPILER_RT_HAS_PROFILE FALSE)
Index: lib/profile/InstrProfilingPlatformLinux.c
===================================================================
--- lib/profile/InstrProfilingPlatformLinux.c
+++ lib/profile/InstrProfilingPlatformLinux.c
@@ -8,7 +8,7 @@
 \*===----------------------------------------------------------------------===*/
 
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \
-    (defined(__sun__) && defined(__svr4__))
+    (defined(__sun__) && defined(__svr4__)) || defined(__NetBSD__)
 
 #include <stdlib.h>
 
Index: lib/profile/InstrProfilingPlatformOther.c
===================================================================
--- lib/profile/InstrProfilingPlatformOther.c
+++ lib/profile/InstrProfilingPlatformOther.c
@@ -8,7 +8,7 @@
 \*===----------------------------------------------------------------------===*/
 
 #if !defined(__APPLE__) && !defined(__linux__) && !defined(__FreeBSD__) && \
-    !(defined(__sun__) && defined(__svr4__))
+    !(defined(__sun__) && defined(__svr4__)) && !defined(__NetBSD__)
 
 #include <stdlib.h>
 
Index: test/profile/instrprof-dlopen-dlclose-gcov.test
===================================================================
--- test/profile/instrprof-dlopen-dlclose-gcov.test
+++ test/profile/instrprof-dlopen-dlclose-gcov.test
@@ -1,3 +1,6 @@
+# atexit(3) not supported in dlopen(3)ed+dlclose(3)d DSO
+XFAIL: netbsd
+
 RUN: mkdir -p %t.d
 RUN: cd %t.d
 
Index: test/profile/lit.cfg
===================================================================
--- test/profile/lit.cfg
+++ test/profile/lit.cfg
@@ -67,7 +67,7 @@
 
 config.substitutions.append( ("%clang_lto_profgen=", build_invocation(clang_cflags, True) + " -fprofile-instr-generate=") )
 
-if config.host_os not in ['Darwin', 'FreeBSD', 'Linux', 'SunOS']:
+if config.host_os not in ['Darwin', 'FreeBSD', 'Linux', 'NetBSD', 'SunOS']:
   config.unsupported = True
 
 if config.target_arch in ['armv7l']: