diff --git a/libc-test/build.rs b/libc-test/build.rs
index d5bf3ea61ba39..08c07e6776131 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -204,6 +204,7 @@ fn test_apple(target: &str) {
         "iconv.h",
         "ifaddrs.h",
         "langinfo.h",
+        "libgen.h",
         "libproc.h",
         "limits.h",
         "locale.h",
@@ -417,6 +418,7 @@ fn test_openbsd(target: &str) {
         "errno.h",
         "execinfo.h",
         "fcntl.h",
+        "libgen.h",
         "limits.h",
         "link.h",
         "locale.h",
@@ -992,6 +994,7 @@ fn test_netbsd(target: &str) {
         "elf.h",
         "errno.h",
         "fcntl.h",
+        "libgen.h",
         "limits.h",
         "link.h",
         "locale.h",
@@ -1206,6 +1209,7 @@ fn test_dragonflybsd(target: &str) {
         "ifaddrs.h",
         "kvm.h",
         "langinfo.h",
+        "libgen.h",
         "limits.h",
         "link.h",
         "locale.h",
@@ -1505,6 +1509,7 @@ fn test_android(target: &str) {
                "fcntl.h",
                "grp.h",
                "ifaddrs.h",
+               "libgen.h",
                "limits.h",
                "link.h",
                "locale.h",
@@ -1866,6 +1871,7 @@ fn test_freebsd(target: &str) {
                 "iconv.h",
                 "ifaddrs.h",
                 "langinfo.h",
+                "libgen.h",
                 "libutil.h",
                 "limits.h",
                 "link.h",
@@ -2771,6 +2777,7 @@ fn test_linux(target: &str) {
                "iconv.h",
                "ifaddrs.h",
                "langinfo.h",
+               "libgen.h",
                "limits.h",
                "link.h",
                "locale.h",
diff --git a/libc-test/semver/android.txt b/libc-test/semver/android.txt
index d5d9fc5600ee6..6445af0264b56 100644
--- a/libc-test/semver/android.txt
+++ b/libc-test/semver/android.txt
@@ -3548,3 +3548,5 @@ winsize
 wmemchr
 write
 writev
+dirname
+basename
\ No newline at end of file
diff --git a/libc-test/semver/apple.txt b/libc-test/semver/apple.txt
index 723541817468c..95af36bbb41f7 100644
--- a/libc-test/semver/apple.txt
+++ b/libc-test/semver/apple.txt
@@ -2227,3 +2227,5 @@ wait4
 waitid
 xsw_usage
 xucred
+dirname
+basename
\ No newline at end of file
diff --git a/libc-test/semver/dragonfly.txt b/libc-test/semver/dragonfly.txt
index fa472ce662747..f8f0fa08915a8 100644
--- a/libc-test/semver/dragonfly.txt
+++ b/libc-test/semver/dragonfly.txt
@@ -1546,3 +1546,5 @@ wait4
 waitid
 xucred
 eaccess
+dirname
+basename
diff --git a/libc-test/semver/freebsd.txt b/libc-test/semver/freebsd.txt
index 649ef77161524..09bda1f2dd64f 100644
--- a/libc-test/semver/freebsd.txt
+++ b/libc-test/semver/freebsd.txt
@@ -1925,4 +1925,6 @@ wait4
 waitid
 xallocx
 xucred
-eaccess
\ No newline at end of file
+eaccess
+dirname
+basename
\ No newline at end of file
diff --git a/libc-test/semver/linux-gnu.txt b/libc-test/semver/linux-gnu.txt
index a4289ad8496cf..deec042d59780 100644
--- a/libc-test/semver/linux-gnu.txt
+++ b/libc-test/semver/linux-gnu.txt
@@ -657,4 +657,6 @@ eaccess
 asctime_r
 ctime_r
 strftime
-strptime
\ No newline at end of file
+strptime
+dirname
+basename
\ No newline at end of file
diff --git a/libc-test/semver/linux-musl.txt b/libc-test/semver/linux-musl.txt
index c00934af108e2..7af14189312d1 100644
--- a/libc-test/semver/linux-musl.txt
+++ b/libc-test/semver/linux-musl.txt
@@ -52,4 +52,6 @@ euidaccess
 eaccess
 asctime_r
 strftime
-strptime
\ No newline at end of file
+strptime
+dirname
+basename
\ No newline at end of file
diff --git a/libc-test/semver/netbsd.txt b/libc-test/semver/netbsd.txt
index f14f2eae45775..97d76cb3049d2 100644
--- a/libc-test/semver/netbsd.txt
+++ b/libc-test/semver/netbsd.txt
@@ -1533,3 +1533,5 @@ uucred
 vm_size_t
 wait4
 waitid
+dirname
+basename
\ No newline at end of file
diff --git a/libc-test/semver/openbsd.txt b/libc-test/semver/openbsd.txt
index 0ae23f549bd26..d540671e1b037 100644
--- a/libc-test/semver/openbsd.txt
+++ b/libc-test/semver/openbsd.txt
@@ -1231,3 +1231,5 @@ utmp
 utrace
 wait4
 xucred
+dirname
+basename
\ No newline at end of file
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index 8a7e2f1f09e01..6b391893a3bcd 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -5870,6 +5870,9 @@ extern "C" {
 
     pub fn malloc_size(ptr: *const ::c_void) -> ::size_t;
     pub fn malloc_good_size(size: ::size_t) -> ::size_t;
+
+    pub fn dirname(path: *mut ::c_char) -> *mut ::c_char;
+    pub fn basename(path: *mut ::c_char) -> *mut ::c_char;
 }
 
 pub unsafe fn mach_task_self() -> ::mach_port_t {
diff --git a/src/unix/bsd/freebsdlike/dragonfly/mod.rs b/src/unix/bsd/freebsdlike/dragonfly/mod.rs
index 96818616b2c6f..70fe6e2edd03b 100644
--- a/src/unix/bsd/freebsdlike/dragonfly/mod.rs
+++ b/src/unix/bsd/freebsdlike/dragonfly/mod.rs
@@ -1663,6 +1663,9 @@ extern "C" {
 
     pub fn umtx_sleep(ptr: *const ::c_int, value: ::c_int, timeout: ::c_int) -> ::c_int;
     pub fn umtx_wakeup(ptr: *const ::c_int, count: ::c_int) -> ::c_int;
+
+    pub fn dirname(path: *mut ::c_char) -> *mut ::c_char;
+    pub fn basename(path: *mut ::c_char) -> *mut ::c_char;
 }
 
 #[link(name = "rt")]
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index f34b24c579a45..e52e0fd338acf 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -4356,6 +4356,9 @@ extern "C" {
         uaddr: *mut ::c_void,
         uaddr2: *mut ::c_void,
     ) -> ::c_int;
+
+    pub fn dirname(path: *mut ::c_char) -> *mut ::c_char;
+    pub fn basename(path: *const ::c_char) -> *mut ::c_char;
 }
 
 #[link(name = "kvm")]
diff --git a/src/unix/bsd/netbsdlike/mod.rs b/src/unix/bsd/netbsdlike/mod.rs
index 6c2096b1d9acf..b71531c253db1 100644
--- a/src/unix/bsd/netbsdlike/mod.rs
+++ b/src/unix/bsd/netbsdlike/mod.rs
@@ -743,6 +743,9 @@ extern "C" {
     pub fn gethostid() -> ::c_long;
     pub fn sethostid(hostid: ::c_long) -> ::c_int;
     pub fn ftok(path: *const ::c_char, id: ::c_int) -> ::key_t;
+
+    pub fn dirname(path: *mut ::c_char) -> *mut ::c_char;
+    pub fn basename(path: *mut ::c_char) -> *mut ::c_char;
 }
 
 cfg_if! {
diff --git a/src/unix/linux_like/android/mod.rs b/src/unix/linux_like/android/mod.rs
index 67e5eb52b4e60..683a4c3ef9ae1 100644
--- a/src/unix/linux_like/android/mod.rs
+++ b/src/unix/linux_like/android/mod.rs
@@ -3227,6 +3227,9 @@ extern "C" {
     pub fn reallocarray(ptr: *mut ::c_void, nmemb: ::size_t, size: ::size_t) -> *mut ::c_void;
 
     pub fn pthread_getcpuclockid(thread: ::pthread_t, clk_id: *mut ::clockid_t) -> ::c_int;
+
+    pub fn dirname(path: *const ::c_char) -> *mut ::c_char;
+    pub fn basename(path: *const ::c_char) -> *mut ::c_char;
 }
 
 cfg_if! {
diff --git a/src/unix/linux_like/linux/gnu/mod.rs b/src/unix/linux_like/linux/gnu/mod.rs
index 3506d922ddf74..b6cc36a588f8b 100644
--- a/src/unix/linux_like/linux/gnu/mod.rs
+++ b/src/unix/linux_like/linux/gnu/mod.rs
@@ -1346,6 +1346,9 @@ extern "C" {
         tm: *const ::tm,
     ) -> ::size_t;
     pub fn strptime(s: *const ::c_char, format: *const ::c_char, tm: *mut ::tm) -> *mut ::c_char;
+
+    pub fn dirname(path: *mut ::c_char) -> *mut ::c_char;
+    pub fn basename(path: *mut ::c_char) -> *mut ::c_char;
 }
 
 extern "C" {
diff --git a/src/unix/linux_like/linux/musl/mod.rs b/src/unix/linux_like/linux/musl/mod.rs
index 32d35782187f8..25291c2306115 100644
--- a/src/unix/linux_like/linux/musl/mod.rs
+++ b/src/unix/linux_like/linux/musl/mod.rs
@@ -767,6 +767,9 @@ extern "C" {
         tm: *const ::tm,
     ) -> ::size_t;
     pub fn strptime(s: *const ::c_char, format: *const ::c_char, tm: *mut ::tm) -> *mut ::c_char;
+
+    pub fn dirname(path: *mut ::c_char) -> *mut ::c_char;
+    pub fn basename(path: *mut ::c_char) -> *mut ::c_char;
 }
 
 cfg_if! {