diff --git a/libc/include/CMakeLists.txt b/libc/include/CMakeLists.txt
index 3f4bbf85160b..ab1cf79dbc42 100644
--- a/libc/include/CMakeLists.txt
+++ b/libc/include/CMakeLists.txt
@@ -236,6 +236,14 @@ add_header_macro(
     .llvm-libc-types.cfloat16
 )
 
+add_header_macro(
+  cpio
+  ../libc/include/cpio.yaml
+  cpio.h
+  DEPENDS
+    .llvm_libc_common_h
+)
+
 add_header_macro(
   setjmp
   ../libc/include/setjmp.yaml
diff --git a/libc/include/cpio.yaml b/libc/include/cpio.yaml
new file mode 100644
index 000000000000..518bc73bc876
--- /dev/null
+++ b/libc/include/cpio.yaml
@@ -0,0 +1,50 @@
+header: cpio.h
+standards:
+  - posix
+macros:
+  - macro_name: C_IRUSR
+    macro_value: "000400"
+  - macro_name: C_IWUSR
+    macro_value: "000200"
+  - macro_name: C_IXUSR
+    macro_value: "000100"
+  - macro_name: C_IRGRP
+    macro_value: "000040"
+  - macro_name: C_IWGRP
+    macro_value: "000020"
+  - macro_name: C_IXGRP
+    macro_value: "000010"
+  - macro_name: C_IROTH
+    macro_value: "000004"
+  - macro_name: C_IWOTH
+    macro_value: "000002"
+  - macro_name: C_IXOTH
+    macro_value: "000001"
+  - macro_name: C_ISUID
+    macro_value: "004000"
+  - macro_name: C_ISGID
+    macro_value: "002000"
+  - macro_name: C_ISVTX
+    macro_value: "001000"
+  - macro_name: C_ISDIR
+    macro_value: "040000"
+  - macro_name: C_ISFIFO
+    macro_value: "010000"
+  - macro_name: C_ISREG
+    macro_value: "0100000"
+  - macro_name: C_ISBLK
+    macro_value: "060000"
+  - macro_name: C_ISCHR
+    macro_value: "020000"
+  - macro_name: C_ISCTG
+    macro_value: "0110000"
+  - macro_name: C_ISLNK
+    macro_value: "0120000"
+  - macro_name: C_ISSOCK
+    macro_value: "0140000"
+  - macro_name: MAGIC
+    macro_value: '"070707"'
+types: []
+enums: []
+objects: []
+functions: []