Auto merge of #2208 - JohnTitor:memmem-macos, r=Amanieu

Declare `memmem` on macOS

Closes #2181

2 files changed, 14 insertions, 0 deletions

diff --git a/libc-test/semver/macos.txt b/libc-test/semver/macos.txt
new file mode 100644
index 0000000000..d6a91320b8
--- /dev/null
+++ b/libc-test/semver/macos.txt
@@ -0,0 +1 @@
+memmem
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index 8449e9a1f0..bbab89ed61 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -4100,6 +4100,19 @@ extern "C" {
     pub fn proc_libversion(major: *mut ::c_int, mintor: *mut ::c_int) -> ::c_int;
 }
 
+cfg_if! {
+    if #[cfg(target_os = "macos")] {
+        extern "C" {
+            pub fn memmem(
+                haystack: *const ::c_void,
+                haystacklen: ::size_t,
+                needle: *const ::c_void,
+                needlelen: ::size_t,
+            ) -> *mut ::c_void;
+        }
+    }
+}
+
 #[link(name = "iconv")]
 extern "C" {
     pub fn iconv_open(tocode: *const ::c_char, fromcode: *const ::c_char) -> iconv_t;