diff --git a/llvm/cmake/config-ix.cmake b/llvm/cmake/config-ix.cmake
--- a/llvm/cmake/config-ix.cmake
+++ b/llvm/cmake/config-ix.cmake
@@ -10,6 +10,7 @@
 include(CheckFunctionExists)
 include(CheckStructHasMember)
 include(CheckCCompilerFlag)
+include(CheckCSourceCompiles)
 include(CMakePushCheckState)
 
 include(CheckCompilerVersion)
@@ -63,12 +64,17 @@
 check_include_file(fenv.h HAVE_FENV_H)
 check_symbol_exists(FE_ALL_EXCEPT "fenv.h" HAVE_DECL_FE_ALL_EXCEPT)
 check_symbol_exists(FE_INEXACT "fenv.h" HAVE_DECL_FE_INEXACT)
+check_c_source_compiles("
+        void *foo() {
+          return __builtin_thread_pointer();
+        }
+        int main(void) { return 0; }"
+        HAVE_BUILTIN_THREAD_POINTER)
 
 check_include_file(mach/mach.h HAVE_MACH_MACH_H)
 check_include_file(CrashReporterClient.h HAVE_CRASHREPORTERCLIENT_H)
 if(APPLE)
-  include(CheckCSourceCompiles)
-  CHECK_C_SOURCE_COMPILES("
+  check_c_source_compiles("
      static const char *__crashreporter_info__ = 0;
      asm(\".desc ___crashreporter_info__, 0x10\");
      int main(void) { return 0; }"
diff --git a/llvm/include/llvm/Config/config.h.cmake b/llvm/include/llvm/Config/config.h.cmake
--- a/llvm/include/llvm/Config/config.h.cmake
+++ b/llvm/include/llvm/Config/config.h.cmake
@@ -331,4 +331,6 @@
 
 #cmakedefine HAVE_PROC_PID_RUSAGE 1
 
+#cmakedefine HAVE_BUILTIN_THREAD_POINTER ${HAVE_BUILTIN_THREAD_POINTER}
+
 #endif
diff --git a/llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp b/llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp
--- a/llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp
+++ b/llvm/tools/llvm-exegesis/lib/BenchmarkRunner.cpp
@@ -39,7 +39,7 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
-#if defined(__GLIBC__) && __has_include(<sys/rseq.h>) && __has_builtin(__builtin_thread_pointer)
+#if defined(__GLIBC__) && __has_include(<sys/rseq.h>) && defined(HAVE_BUILTIN_THREAD_POINTER)
 #include <sys/rseq.h>
 #ifdef RSEQ_SIG
 #define GLIBC_INITS_RSEQ