diff --git a/llvm/cmake/config-ix.cmake b/llvm/cmake/config-ix.cmake
index 15ae04f5a6913..cdda9711f0db1 100644
--- a/llvm/cmake/config-ix.cmake
+++ b/llvm/cmake/config-ix.cmake
@@ -22,6 +22,7 @@ if (ANDROID OR CYGWIN OR CMAKE_SYSTEM_NAME MATCHES "AIX|DragonFly|FreeBSD|Haiku|
   set(HAVE_MALLOC_MALLOC_H 0)
   set(HAVE_PTHREAD_H 1)
   set(HAVE_SYS_MMAN_H 1)
+  set(HAVE_SYS_RESOURCE_H 1)
   set(HAVE_SYSEXITS_H 1)
   set(HAVE_UNISTD_H 1)
 elseif (APPLE)
@@ -29,6 +30,7 @@ elseif (APPLE)
   set(HAVE_MALLOC_MALLOC_H 1)
   set(HAVE_PTHREAD_H 1)
   set(HAVE_SYS_MMAN_H 1)
+  set(HAVE_SYS_RESOURCE_H 1)
   set(HAVE_SYSEXITS_H 1)
   set(HAVE_UNISTD_H 1)
 elseif (PURE_WINDOWS)
@@ -36,6 +38,7 @@ elseif (PURE_WINDOWS)
   set(HAVE_MALLOC_MALLOC_H 0)
   set(HAVE_PTHREAD_H 0)
   set(HAVE_SYS_MMAN_H 0)
+  set(HAVE_SYS_RESOURCE_H 0)
   set(HAVE_SYSEXITS_H 0)
   set(HAVE_UNISTD_H 0)
 elseif (ZOS)
@@ -45,6 +48,7 @@ elseif (ZOS)
   set(HAVE_MALLOC_MALLOC_H 0)
   set(HAVE_PTHREAD_H 1)
   set(HAVE_SYS_MMAN_H 1)
+  set(HAVE_SYS_RESOURCE_H 1)
   set(HAVE_SYSEXITS_H 0)
   set(HAVE_UNISTD_H 1)
 else()
@@ -53,6 +57,7 @@ else()
   check_include_file(malloc/malloc.h HAVE_MALLOC_MALLOC_H)
   check_include_file(pthread.h HAVE_PTHREAD_H)
   check_include_file(sys/mman.h HAVE_SYS_MMAN_H)
+  check_include_file(sys/resource.h HAVE_SYS_RESOURCE_H)
   check_include_file(sysexits.h HAVE_SYSEXITS_H)
   check_include_file(unistd.h HAVE_UNISTD_H)
 endif()
diff --git a/llvm/include/llvm/Config/config.h.cmake b/llvm/include/llvm/Config/config.h.cmake
index 835201f2a45b0..81f347cd18bc3 100644
--- a/llvm/include/llvm/Config/config.h.cmake
+++ b/llvm/include/llvm/Config/config.h.cmake
@@ -168,6 +168,9 @@
 /* Define to 1 if you have the <sys/mman.h> header file. */
 #cmakedefine HAVE_SYS_MMAN_H ${HAVE_SYS_MMAN_H}
 
+/* Define to 1 if you have the <sys/resource.h> header file. */
+#cmakedefine HAVE_SYS_RESOURCE_H ${HAVE_SYS_RESOURCE_H}
+
 /* Define to 1 if stat struct has st_mtimespec member .*/
 #cmakedefine HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC ${HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC}