diff --git a/libc-test/build.rs b/libc-test/build.rs
index d35101d4cae3..d023c466a391 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -364,9 +364,6 @@ fn test_apple(target: &str) {
             // FIXME: "'__uint128' undeclared" in C
             "__uint128" => true,
 
-            // `c_char_def` is always public but not always reexported.
-            "c_char_def" => true,
-
             _ => false,
         }
     });
@@ -647,11 +644,6 @@ fn test_openbsd(target: &str) {
         }
     });
 
-    cfg.skip_type(move |ty| {
-        // `c_char_def` is always public but not always reexported.
-        ty == "c_char_def"
-    });
-
     cfg.type_name(move |ty, is_struct, is_union| {
         match ty {
             // Just pass all these through, no need for a "struct" prefix
@@ -766,8 +758,6 @@ fn test_windows(target: &str) {
         "ssize_t" if !gnu => true,
         // FIXME: The size and alignment of this type are incorrect
         "time_t" if gnu && i686 => true,
-        // `c_char_def` is always public but not always reexported.
-        "c_char_def" => true,
         _ => false,
     });
 
@@ -985,8 +975,6 @@ fn test_solarish(target: &str) {
 
     cfg.skip_type(move |ty| match ty {
         "sighandler_t" => true,
-        // `c_char_def` is always public but not always reexported.
-        "c_char_def" => true,
         _ => false,
     });
 
@@ -1290,8 +1278,6 @@ fn test_netbsd(target: &str) {
         match ty {
             // FIXME: sighandler_t is crazy across platforms
             "sighandler_t" => true,
-            // `c_char_def` is always public but not always reexported.
-            "c_char_def" => true,
             _ => false,
         }
     });
@@ -1511,8 +1497,6 @@ fn test_dragonflybsd(target: &str) {
         match ty {
             // sighandler_t is crazy across platforms
             "sighandler_t" => true,
-            // `c_char_def` is always public but not always reexported.
-            "c_char_def" => true,
             _ => false,
         }
     });
@@ -1674,8 +1658,6 @@ fn test_wasi(target: &str) {
         }
     });
 
-    cfg.skip_type(|ty| ty == "c_char_def");
-
     // These have a different and internal type in header files and are only
     // used here to generate a pointer to them in bindings so skip these tests.
     cfg.skip_static(|c| c.starts_with("_CLOCK_"));
@@ -1924,9 +1906,6 @@ fn test_android(target: &str) {
             // FIXME: "'__uint128' undeclared" in C
             "__uint128" => true,
 
-            // `c_char_def` is always public but not always reexported.
-            "c_char_def" => true,
-
             _ => false,
         }
     });
@@ -2689,9 +2668,6 @@ fn test_freebsd(target: &str) {
             // `eventfd(2)` and things come with it are added in FreeBSD 13
             "eventfd_t" if Some(13) > freebsd_ver => true,
 
-            // `c_char_def` is always public but not always reexported.
-            "c_char_def" => true,
-
             _ => false,
         }
     });
@@ -3012,9 +2988,6 @@ fn test_emscripten(target: &str) {
             // https://github.com/emscripten-core/emscripten/issues/5033
             ty if ty.starts_with("epoll") => true,
 
-            // `c_char_def` is always public but not always reexported.
-            "c_char_def" => true,
-
             // LFS64 types have been removed in Emscripten 3.1.44
             // https://github.com/emscripten-core/emscripten/pull/19812
             t => t.ends_with("64") || t.ends_with("64_t"),
@@ -3286,9 +3259,6 @@ fn test_neutrino(target: &str) {
             // Does not exist in Neutrino
             "locale_t" => true,
 
-            // `c_char_def` is always public but not always reexported.
-            "c_char_def" => true,
-
             _ => false,
         }
     });
@@ -3455,8 +3425,6 @@ fn test_vxworks(target: &str) {
     // FIXME
     cfg.skip_type(move |ty| match ty {
         "stat64" | "sighandler_t" | "off64_t" => true,
-        // `c_char_def` is always public but not always reexported.
-        "c_char_def" => true,
         _ => false,
     });
 
@@ -3804,9 +3772,6 @@ fn test_linux(target: &str) {
             // FIXME: "'__uint128' undeclared" in C
             "__uint128" => true,
 
-            // `c_char_def` is always public but not always reexported.
-            "c_char_def" => true,
-
             t => {
                 if musl {
                     // LFS64 types have been removed in musl 1.2.4+
@@ -4036,7 +4001,7 @@ fn test_linux(target: &str) {
             }
             // FIXME: Requires >= 5.4 kernel headers
             if name == "PTP_CLOCK_GETCAPS2"
-                || name == "PTP_ENABLE_PPS2" 
+                || name == "PTP_ENABLE_PPS2"
                 || name == "PTP_EXTTS_REQUEST2"
                 || name == "PTP_PEROUT_REQUEST2"
                 || name == "PTP_PIN_GETFUNC2"
@@ -4759,8 +4724,6 @@ fn test_linux_like_apis(target: &str) {
             })
             .skip_type(move |ty| match ty {
                 "Elf64_Phdr" | "Elf32_Phdr" => false,
-                // `c_char_def` is always public but not always reexported.
-                "c_char_def" => true,
                 _ => true,
             });
         cfg.generate(src_hotfix_dir().join("lib.rs"), "linux_elf.rs");
@@ -4996,8 +4959,6 @@ fn test_haiku(target: &str) {
             "pthread_condattr_t" => true,
             "pthread_mutexattr_t" => true,
             "pthread_rwlockattr_t" => true,
-            // `c_char_def` is always public but not always reexported.
-            "c_char_def" => true,
             _ => false,
         }
     });
diff --git a/src/fuchsia/aarch64.rs b/src/fuchsia/aarch64.rs
index b82237510094..577f0d99cf24 100644
--- a/src/fuchsia/aarch64.rs
+++ b/src/fuchsia/aarch64.rs
@@ -1,7 +1,6 @@
 use crate::off_t;
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type __u64 = c_ulonglong;
 pub type wchar_t = u32;
 pub type nlink_t = c_ulong;
diff --git a/src/fuchsia/riscv64.rs b/src/fuchsia/riscv64.rs
index bed7a926030f..c57d52aad138 100644
--- a/src/fuchsia/riscv64.rs
+++ b/src/fuchsia/riscv64.rs
@@ -2,7 +2,6 @@ use crate::off_t;
 use crate::prelude::*;
 
 // From psABI Calling Convention for RV64
-pub type c_char = u8;
 pub type __u64 = c_ulonglong;
 pub type wchar_t = i32;
 
diff --git a/src/fuchsia/x86_64.rs b/src/fuchsia/x86_64.rs
index b82b86adcd41..ffff3a78b5ed 100644
--- a/src/fuchsia/x86_64.rs
+++ b/src/fuchsia/x86_64.rs
@@ -1,7 +1,6 @@
 use crate::off_t;
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type nlink_t = u64;
 pub type blksize_t = c_long;
diff --git a/src/hermit.rs b/src/hermit.rs
index 9363fed78830..03947bc01ade 100644
--- a/src/hermit.rs
+++ b/src/hermit.rs
@@ -1,6 +1,5 @@
 //! Hermit C type definitions
 
-pub use crate::arch::c_char_def as c_char;
 use crate::prelude::*;
 
 pub type c_schar = i8;
diff --git a/src/lib.rs b/src/lib.rs
index 569775095fa8..c1cdc7f1bc4e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -41,41 +41,35 @@ cfg_if! {
 
 pub use core::ffi::c_void;
 
-/// Type definitions that are coupled tighter to architecture than OS.
-mod arch {
-    cfg_if! {
-        // This configuration comes from `rust-lang/rust` in `library/core/src/ffi/mod.rs`.
-        if #[cfg(all(
-            not(windows),
-            // FIXME(ctest): just use `target_vendor` = "apple"` once `ctest` supports it
-            not(any(
-                target_os = "macos",
-                target_os = "ios",
-                target_os = "tvos",
-                target_os = "watchos",
-                target_os = "visionos",
-            )),
-            any(
-                target_arch = "aarch64",
-                target_arch = "arm",
-                target_arch = "csky",
-                target_arch = "hexagon",
-                target_arch = "msp430",
-                target_arch = "powerpc",
-                target_arch = "powerpc64",
-                target_arch = "riscv64",
-                target_arch = "riscv32",
-                target_arch = "s390x",
-                target_arch = "xtensa",
-            )
-        ))] {
-            // To be reexported as `c_char`
-            // FIXME(ctest): just name these `c_char` once `ctest` learns that these don't get
-            // exported.
-            pub type c_char_def = u8;
-        } else {
-            pub type c_char_def = i8;
-        }
+cfg_if! {
+    // This configuration comes from `rust-lang/rust` in `library/core/src/ffi/mod.rs`.
+    if #[cfg(all(
+        not(windows),
+        // FIXME(ctest): just use `target_vendor` = "apple"` once `ctest` supports it
+        not(any(
+            target_os = "macos",
+            target_os = "ios",
+            target_os = "tvos",
+            target_os = "watchos",
+            target_os = "visionos",
+        )),
+        any(
+            target_arch = "aarch64",
+            target_arch = "arm",
+            target_arch = "csky",
+            target_arch = "hexagon",
+            target_arch = "msp430",
+            target_arch = "powerpc",
+            target_arch = "powerpc64",
+            target_arch = "riscv64",
+            target_arch = "riscv32",
+            target_arch = "s390x",
+            target_arch = "xtensa",
+        )
+    ))] {
+        pub type c_char = u8;
+    } else {
+        pub type c_char = i8;
     }
 }
 
diff --git a/src/psp.rs b/src/psp.rs
index e1bf285967ed..ed9d4f4d5b41 100644
--- a/src/psp.rs
+++ b/src/psp.rs
@@ -25,7 +25,6 @@ pub type intptr_t = isize;
 pub type uintptr_t = usize;
 pub type ssize_t = isize;
 
-pub type c_char = u8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 
diff --git a/src/sgx.rs b/src/sgx.rs
index e37ccd79c3a5..65eded63ad46 100644
--- a/src/sgx.rs
+++ b/src/sgx.rs
@@ -19,7 +19,6 @@ pub type intptr_t = isize;
 pub type uintptr_t = usize;
 pub type ssize_t = isize;
 
-pub type c_char = i8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 
diff --git a/src/solid/aarch64.rs b/src/solid/aarch64.rs
index 4032488b6c0d..630c7db54b55 100644
--- a/src/solid/aarch64.rs
+++ b/src/solid/aarch64.rs
@@ -1,4 +1,3 @@
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type c_long = i64;
 pub type c_ulong = u64;
diff --git a/src/solid/arm.rs b/src/solid/arm.rs
index 55240068aa08..01fc7262f03e 100644
--- a/src/solid/arm.rs
+++ b/src/solid/arm.rs
@@ -1,4 +1,3 @@
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type c_long = i32;
 pub type c_ulong = u32;
diff --git a/src/switch.rs b/src/switch.rs
index 4a8b16e15f56..1875ea81ad1e 100644
--- a/src/switch.rs
+++ b/src/switch.rs
@@ -20,7 +20,6 @@ pub type uintptr_t = usize;
 pub type ssize_t = isize;
 
 pub type off_t = i64;
-pub type c_char = u8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type wchar_t = u32;
diff --git a/src/teeos/mod.rs b/src/teeos/mod.rs
index 40bc0c0549a0..b055d2aca8c7 100644
--- a/src/teeos/mod.rs
+++ b/src/teeos/mod.rs
@@ -45,9 +45,6 @@ pub type ssize_t = isize;
 
 pub type pid_t = c_int;
 
-// aarch64 specific
-pub type c_char = u8;
-
 pub type wchar_t = u32;
 
 pub type c_long = i64;
diff --git a/src/trusty.rs b/src/trusty.rs
index 676a456d892f..db908d5c6d47 100644
--- a/src/trusty.rs
+++ b/src/trusty.rs
@@ -1,4 +1,3 @@
-pub use crate::arch::c_char_def as c_char;
 use crate::prelude::*;
 pub type size_t = usize;
 pub type ssize_t = isize;
diff --git a/src/unix/aix/mod.rs b/src/unix/aix/mod.rs
index 6e98709dc546..647836b6f671 100644
--- a/src/unix/aix/mod.rs
+++ b/src/unix/aix/mod.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type caddr_t = *mut c_char;
 pub type clockid_t = c_longlong;
 pub type blkcnt_t = c_long;
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index 943d9e400ecc..fe8bad4209f3 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -5,7 +5,6 @@
 use crate::prelude::*;
 use crate::{cmsghdr, off_t};
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type clock_t = c_ulong;
 pub type time_t = c_long;
diff --git a/src/unix/bsd/freebsdlike/dragonfly/mod.rs b/src/unix/bsd/freebsdlike/dragonfly/mod.rs
index db83835f12c9..2897ad377f14 100644
--- a/src/unix/bsd/freebsdlike/dragonfly/mod.rs
+++ b/src/unix/bsd/freebsdlike/dragonfly/mod.rs
@@ -2,7 +2,6 @@ use crate::prelude::*;
 use crate::{cmsghdr, off_t};
 
 pub type dev_t = u32;
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type clock_t = u64;
 pub type ino_t = u64;
diff --git a/src/unix/bsd/freebsdlike/freebsd/aarch64.rs b/src/unix/bsd/freebsdlike/freebsd/aarch64.rs
index 81d3eb351cdb..0201008e485f 100644
--- a/src/unix/bsd/freebsdlike/freebsd/aarch64.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/aarch64.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type clock_t = i32;
diff --git a/src/unix/bsd/freebsdlike/freebsd/arm.rs b/src/unix/bsd/freebsdlike/freebsd/arm.rs
index 07492c9333d7..1624e655a0f4 100644
--- a/src/unix/bsd/freebsdlike/freebsd/arm.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/arm.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type c_long = i32;
 pub type c_ulong = u32;
 pub type clock_t = u32;
diff --git a/src/unix/bsd/freebsdlike/freebsd/powerpc.rs b/src/unix/bsd/freebsdlike/freebsd/powerpc.rs
index 0bd678c9821b..6c8c973d570d 100644
--- a/src/unix/bsd/freebsdlike/freebsd/powerpc.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/powerpc.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type c_long = i32;
 pub type c_ulong = u32;
 pub type clock_t = u32;
diff --git a/src/unix/bsd/freebsdlike/freebsd/powerpc64.rs b/src/unix/bsd/freebsdlike/freebsd/powerpc64.rs
index e1548a2fa4a0..a812568b38e7 100644
--- a/src/unix/bsd/freebsdlike/freebsd/powerpc64.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/powerpc64.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type clock_t = u32;
diff --git a/src/unix/bsd/freebsdlike/freebsd/riscv64.rs b/src/unix/bsd/freebsdlike/freebsd/riscv64.rs
index e425411436d2..212413cbe22a 100644
--- a/src/unix/bsd/freebsdlike/freebsd/riscv64.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/riscv64.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type clock_t = i32;
diff --git a/src/unix/bsd/freebsdlike/freebsd/x86.rs b/src/unix/bsd/freebsdlike/freebsd/x86.rs
index 5af53cd76f66..c5a922b45564 100644
--- a/src/unix/bsd/freebsdlike/freebsd/x86.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/x86.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type c_long = i32;
 pub type c_ulong = u32;
 pub type clock_t = c_ulong;
diff --git a/src/unix/bsd/freebsdlike/freebsd/x86_64/mod.rs b/src/unix/bsd/freebsdlike/freebsd/x86_64/mod.rs
index fca9a126f81c..199ea643fdab 100644
--- a/src/unix/bsd/freebsdlike/freebsd/x86_64/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/x86_64/mod.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type clock_t = i32;
diff --git a/src/unix/bsd/netbsdlike/netbsd/aarch64.rs b/src/unix/bsd/netbsdlike/netbsd/aarch64.rs
index 2391801fe458..dbac03d2fb2a 100644
--- a/src/unix/bsd/netbsdlike/netbsd/aarch64.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/aarch64.rs
@@ -3,7 +3,6 @@ use crate::PT_FIRSTMACH;
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = u8;
 pub type greg_t = u64;
 pub type __cpu_simple_lock_nv_t = c_uchar;
 
diff --git a/src/unix/bsd/netbsdlike/netbsd/arm.rs b/src/unix/bsd/netbsdlike/netbsd/arm.rs
index 1f54c8135bf4..698eba93b31a 100644
--- a/src/unix/bsd/netbsdlike/netbsd/arm.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/arm.rs
@@ -3,7 +3,6 @@ use crate::PT_FIRSTMACH;
 
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type c_char = u8;
 pub type __cpu_simple_lock_nv_t = c_int;
 
 pub(crate) const _ALIGNBYTES: usize = mem::size_of::<c_longlong>() - 1;
diff --git a/src/unix/bsd/netbsdlike/netbsd/mips.rs b/src/unix/bsd/netbsdlike/netbsd/mips.rs
index 7129c0f54eb6..028deb0cfbf7 100644
--- a/src/unix/bsd/netbsdlike/netbsd/mips.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/mips.rs
@@ -3,7 +3,6 @@ use crate::PT_FIRSTMACH;
 
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type c_char = i8;
 pub type __cpu_simple_lock_nv_t = c_int;
 
 pub(crate) const _ALIGNBYTES: usize = mem::size_of::<c_longlong>() - 1;
diff --git a/src/unix/bsd/netbsdlike/netbsd/powerpc.rs b/src/unix/bsd/netbsdlike/netbsd/powerpc.rs
index a086396ed610..20eba6849a3e 100644
--- a/src/unix/bsd/netbsdlike/netbsd/powerpc.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/powerpc.rs
@@ -3,7 +3,6 @@ use crate::PT_FIRSTMACH;
 
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type c_char = u8;
 pub type __cpu_simple_lock_nv_t = c_int;
 
 pub(crate) const _ALIGNBYTES: usize = mem::size_of::<c_double>() - 1;
diff --git a/src/unix/bsd/netbsdlike/netbsd/riscv64.rs b/src/unix/bsd/netbsdlike/netbsd/riscv64.rs
index 68cd264aadb7..0437b994ca27 100644
--- a/src/unix/bsd/netbsdlike/netbsd/riscv64.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/riscv64.rs
@@ -4,7 +4,6 @@ use crate::prelude::*;
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = u8;
 pub type __greg_t = u64;
 pub type __cpu_simple_lock_nv_t = c_int;
 pub type __gregset = [__greg_t; _NGREG];
diff --git a/src/unix/bsd/netbsdlike/netbsd/sparc64.rs b/src/unix/bsd/netbsdlike/netbsd/sparc64.rs
index d564f58a3e68..3cfe535e7edf 100644
--- a/src/unix/bsd/netbsdlike/netbsd/sparc64.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/sparc64.rs
@@ -2,7 +2,6 @@ use crate::prelude::*;
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = i8;
 pub type __cpu_simple_lock_nv_t = c_uchar;
 
 // should be pub(crate), but that requires Rust 1.18.0
diff --git a/src/unix/bsd/netbsdlike/netbsd/x86.rs b/src/unix/bsd/netbsdlike/netbsd/x86.rs
index 3c55792defcb..04741f2dc1f4 100644
--- a/src/unix/bsd/netbsdlike/netbsd/x86.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/x86.rs
@@ -2,7 +2,6 @@ use crate::prelude::*;
 
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type c_char = i8;
 pub type __cpu_simple_lock_nv_t = c_uchar;
 
 pub(crate) const _ALIGNBYTES: usize = mem::size_of::<c_int>() - 1;
diff --git a/src/unix/bsd/netbsdlike/netbsd/x86_64.rs b/src/unix/bsd/netbsdlike/netbsd/x86_64.rs
index f968e36d67aa..52f3da771a15 100644
--- a/src/unix/bsd/netbsdlike/netbsd/x86_64.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/x86_64.rs
@@ -3,7 +3,6 @@ use crate::PT_FIRSTMACH;
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = i8;
 pub type c___greg_t = u64;
 pub type __cpu_simple_lock_nv_t = c_uchar;
 
diff --git a/src/unix/bsd/netbsdlike/openbsd/aarch64.rs b/src/unix/bsd/netbsdlike/openbsd/aarch64.rs
index bf704757c59d..4cd0b3254983 100644
--- a/src/unix/bsd/netbsdlike/openbsd/aarch64.rs
+++ b/src/unix/bsd/netbsdlike/openbsd/aarch64.rs
@@ -2,7 +2,6 @@ use crate::prelude::*;
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = u8;
 pub type ucontext_t = sigcontext;
 
 s! {
diff --git a/src/unix/bsd/netbsdlike/openbsd/arm.rs b/src/unix/bsd/netbsdlike/openbsd/arm.rs
index 1e66ed247a2e..7fd17cf65a55 100644
--- a/src/unix/bsd/netbsdlike/openbsd/arm.rs
+++ b/src/unix/bsd/netbsdlike/openbsd/arm.rs
@@ -2,7 +2,6 @@ use crate::prelude::*;
 
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type c_char = u8;
 
 pub(crate) const _ALIGNBYTES: usize = mem::size_of::<c_double>() - 1;
 
diff --git a/src/unix/bsd/netbsdlike/openbsd/mips64.rs b/src/unix/bsd/netbsdlike/openbsd/mips64.rs
index 15803ced09a0..17ebae2889f1 100644
--- a/src/unix/bsd/netbsdlike/openbsd/mips64.rs
+++ b/src/unix/bsd/netbsdlike/openbsd/mips64.rs
@@ -1,6 +1,5 @@
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = i8;
 
 #[doc(hidden)]
 pub const _ALIGNBYTES: usize = 7;
diff --git a/src/unix/bsd/netbsdlike/openbsd/powerpc.rs b/src/unix/bsd/netbsdlike/openbsd/powerpc.rs
index 1e66ed247a2e..7fd17cf65a55 100644
--- a/src/unix/bsd/netbsdlike/openbsd/powerpc.rs
+++ b/src/unix/bsd/netbsdlike/openbsd/powerpc.rs
@@ -2,7 +2,6 @@ use crate::prelude::*;
 
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type c_char = u8;
 
 pub(crate) const _ALIGNBYTES: usize = mem::size_of::<c_double>() - 1;
 
diff --git a/src/unix/bsd/netbsdlike/openbsd/powerpc64.rs b/src/unix/bsd/netbsdlike/openbsd/powerpc64.rs
index cb808719fb8e..1a3b452091ce 100644
--- a/src/unix/bsd/netbsdlike/openbsd/powerpc64.rs
+++ b/src/unix/bsd/netbsdlike/openbsd/powerpc64.rs
@@ -2,7 +2,6 @@ use crate::prelude::*;
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = u8;
 
 pub(crate) const _ALIGNBYTES: usize = mem::size_of::<c_long>() - 1;
 
diff --git a/src/unix/bsd/netbsdlike/openbsd/riscv64.rs b/src/unix/bsd/netbsdlike/openbsd/riscv64.rs
index 6a39f3494dd1..d37e9a67e688 100644
--- a/src/unix/bsd/netbsdlike/openbsd/riscv64.rs
+++ b/src/unix/bsd/netbsdlike/openbsd/riscv64.rs
@@ -2,7 +2,6 @@ use crate::prelude::*;
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = u8;
 pub type ucontext_t = sigcontext;
 
 s! {
diff --git a/src/unix/bsd/netbsdlike/openbsd/sparc64.rs b/src/unix/bsd/netbsdlike/openbsd/sparc64.rs
index 070fc9385f6c..f8e165a7de29 100644
--- a/src/unix/bsd/netbsdlike/openbsd/sparc64.rs
+++ b/src/unix/bsd/netbsdlike/openbsd/sparc64.rs
@@ -1,6 +1,5 @@
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = i8;
 
 #[doc(hidden)]
 pub const _ALIGNBYTES: usize = 0xf;
diff --git a/src/unix/bsd/netbsdlike/openbsd/x86.rs b/src/unix/bsd/netbsdlike/openbsd/x86.rs
index 4b495d0c16de..cac4ea7f8e94 100644
--- a/src/unix/bsd/netbsdlike/openbsd/x86.rs
+++ b/src/unix/bsd/netbsdlike/openbsd/x86.rs
@@ -2,7 +2,6 @@ use crate::prelude::*;
 
 pub type c_long = i32;
 pub type c_ulong = u32;
-pub type c_char = i8;
 
 pub(crate) const _ALIGNBYTES: usize = mem::size_of::<c_int>() - 1;
 
diff --git a/src/unix/bsd/netbsdlike/openbsd/x86_64.rs b/src/unix/bsd/netbsdlike/openbsd/x86_64.rs
index 4380c1d11892..683046836320 100644
--- a/src/unix/bsd/netbsdlike/openbsd/x86_64.rs
+++ b/src/unix/bsd/netbsdlike/openbsd/x86_64.rs
@@ -3,7 +3,6 @@ use crate::PT_FIRSTMACH;
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = i8;
 pub type ucontext_t = sigcontext;
 
 s! {
diff --git a/src/unix/haiku/mod.rs b/src/unix/haiku/mod.rs
index 78477a10bfc5..10ee719b9c18 100644
--- a/src/unix/haiku/mod.rs
+++ b/src/unix/haiku/mod.rs
@@ -6,7 +6,6 @@ pub type pthread_key_t = c_int;
 pub type nfds_t = c_ulong;
 pub type tcflag_t = c_uint;
 pub type speed_t = c_uchar;
-pub type c_char = i8;
 pub type clock_t = i32;
 pub type clockid_t = i32;
 pub type suseconds_t = i32;
diff --git a/src/unix/hurd/mod.rs b/src/unix/hurd/mod.rs
index 1a04a725ada5..3a9253fc31f5 100644
--- a/src/unix/hurd/mod.rs
+++ b/src/unix/hurd/mod.rs
@@ -4,8 +4,6 @@ use crate::c_schar;
 use crate::prelude::*;
 
 // types
-pub type c_char = i8;
-
 pub type __s16_type = c_short;
 pub type __u16_type = c_ushort;
 pub type __s32_type = c_int;
diff --git a/src/unix/linux_like/android/b32/arm.rs b/src/unix/linux_like/android/b32/arm.rs
index 0bf4087fde75..a6170adc14d3 100644
--- a/src/unix/linux_like/android/b32/arm.rs
+++ b/src/unix/linux_like/android/b32/arm.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type greg_t = i32;
 pub type mcontext_t = sigcontext;
diff --git a/src/unix/linux_like/android/b32/x86/mod.rs b/src/unix/linux_like/android/b32/x86/mod.rs
index 9f80d8a71f44..a5560e051660 100644
--- a/src/unix/linux_like/android/b32/x86/mod.rs
+++ b/src/unix/linux_like/android/b32/x86/mod.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type greg_t = i32;
 
diff --git a/src/unix/linux_like/android/b64/aarch64/mod.rs b/src/unix/linux_like/android/b64/aarch64/mod.rs
index 39d8bc07c4dd..b678eb8da6aa 100644
--- a/src/unix/linux_like/android/b64/aarch64/mod.rs
+++ b/src/unix/linux_like/android/b64/aarch64/mod.rs
@@ -1,7 +1,6 @@
 use crate::off64_t;
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type __u64 = c_ulonglong;
 pub type __s64 = c_longlong;
diff --git a/src/unix/linux_like/android/b64/riscv64/mod.rs b/src/unix/linux_like/android/b64/riscv64/mod.rs
index d35c40895510..c4dc98e010ae 100644
--- a/src/unix/linux_like/android/b64/riscv64/mod.rs
+++ b/src/unix/linux_like/android/b64/riscv64/mod.rs
@@ -1,7 +1,6 @@
 use crate::off64_t;
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type greg_t = i64;
 pub type __u64 = c_ulonglong;
diff --git a/src/unix/linux_like/android/b64/x86_64/mod.rs b/src/unix/linux_like/android/b64/x86_64/mod.rs
index 4da5cd499567..ad878462c8c1 100644
--- a/src/unix/linux_like/android/b64/x86_64/mod.rs
+++ b/src/unix/linux_like/android/b64/x86_64/mod.rs
@@ -1,7 +1,6 @@
 use crate::off64_t;
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type greg_t = i64;
 pub type __u64 = c_ulonglong;
diff --git a/src/unix/linux_like/emscripten/mod.rs b/src/unix/linux_like/emscripten/mod.rs
index 866a20cd0072..c51935ee99f9 100644
--- a/src/unix/linux_like/emscripten/mod.rs
+++ b/src/unix/linux_like/emscripten/mod.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type useconds_t = u32;
 pub type dev_t = u32;
diff --git a/src/unix/linux_like/linux/gnu/b32/arm/mod.rs b/src/unix/linux_like/linux/gnu/b32/arm/mod.rs
index f3869723996c..9462f627d63e 100644
--- a/src/unix/linux_like/linux/gnu/b32/arm/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/arm/mod.rs
@@ -1,7 +1,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = u8;
 pub type wchar_t = u32;
 
 s! {
diff --git a/src/unix/linux_like/linux/gnu/b32/csky/mod.rs b/src/unix/linux_like/linux/gnu/b32/csky/mod.rs
index eb6f70d8fed0..96cc52c55854 100644
--- a/src/unix/linux_like/linux/gnu/b32/csky/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/csky/mod.rs
@@ -1,7 +1,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = u8;
 pub type wchar_t = u32;
 
 s! {
diff --git a/src/unix/linux_like/linux/gnu/b32/m68k/mod.rs b/src/unix/linux_like/linux/gnu/b32/m68k/mod.rs
index 3d252c625303..2de54f047bbb 100644
--- a/src/unix/linux_like/linux/gnu/b32/m68k/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/m68k/mod.rs
@@ -1,7 +1,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 
 s! {
diff --git a/src/unix/linux_like/linux/gnu/b32/mips/mod.rs b/src/unix/linux_like/linux/gnu/b32/mips/mod.rs
index 73da7739dabf..9fd8f819379e 100644
--- a/src/unix/linux_like/linux/gnu/b32/mips/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/mips/mod.rs
@@ -1,7 +1,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 
 s! {
diff --git a/src/unix/linux_like/linux/gnu/b32/powerpc.rs b/src/unix/linux_like/linux/gnu/b32/powerpc.rs
index 75ec2385a123..025ae37002e3 100644
--- a/src/unix/linux_like/linux/gnu/b32/powerpc.rs
+++ b/src/unix/linux_like/linux/gnu/b32/powerpc.rs
@@ -1,7 +1,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = u8;
 pub type wchar_t = i32;
 
 s! {
diff --git a/src/unix/linux_like/linux/gnu/b32/riscv32/mod.rs b/src/unix/linux_like/linux/gnu/b32/riscv32/mod.rs
index 43547cc7ad86..91b17847e10a 100644
--- a/src/unix/linux_like/linux/gnu/b32/riscv32/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/riscv32/mod.rs
@@ -3,7 +3,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = u8;
 pub type wchar_t = c_int;
 
 s! {
diff --git a/src/unix/linux_like/linux/gnu/b32/sparc/mod.rs b/src/unix/linux_like/linux/gnu/b32/sparc/mod.rs
index cfe62018f5fd..fcd3c52bcee3 100644
--- a/src/unix/linux_like/linux/gnu/b32/sparc/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/sparc/mod.rs
@@ -3,7 +3,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 
 s! {
diff --git a/src/unix/linux_like/linux/gnu/b32/x86/mod.rs b/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
index d626236dda79..84fb3ae31e6c 100644
--- a/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
@@ -1,7 +1,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type greg_t = i32;
 
diff --git a/src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs b/src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs
index 27ba5263c536..a4df172b8f5f 100644
--- a/src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/aarch64/mod.rs
@@ -3,7 +3,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type nlink_t = u32;
 pub type blksize_t = i32;
diff --git a/src/unix/linux_like/linux/gnu/b64/loongarch64/mod.rs b/src/unix/linux_like/linux/gnu/b64/loongarch64/mod.rs
index 8c05659dc09a..e8f045ba5f83 100644
--- a/src/unix/linux_like/linux/gnu/b64/loongarch64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/loongarch64/mod.rs
@@ -1,7 +1,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t, pthread_mutex_t};
 
-pub type c_char = i8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type wchar_t = i32;
diff --git a/src/unix/linux_like/linux/gnu/b64/mips64/mod.rs b/src/unix/linux_like/linux/gnu/b64/mips64/mod.rs
index 2d85df1385a1..e1aef3759ddd 100644
--- a/src/unix/linux_like/linux/gnu/b64/mips64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/mips64/mod.rs
@@ -2,7 +2,6 @@ use crate::prelude::*;
 use crate::{off64_t, off_t, pthread_mutex_t};
 
 pub type blksize_t = i64;
-pub type c_char = i8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type nlink_t = u64;
diff --git a/src/unix/linux_like/linux/gnu/b64/powerpc64/mod.rs b/src/unix/linux_like/linux/gnu/b64/powerpc64/mod.rs
index 86d047dbf387..8d79845eb401 100644
--- a/src/unix/linux_like/linux/gnu/b64/powerpc64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/powerpc64/mod.rs
@@ -5,7 +5,6 @@ use crate::{off64_t, off_t, pthread_mutex_t};
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = u8;
 pub type wchar_t = i32;
 pub type nlink_t = u64;
 pub type blksize_t = i64;
diff --git a/src/unix/linux_like/linux/gnu/b64/riscv64/mod.rs b/src/unix/linux_like/linux/gnu/b64/riscv64/mod.rs
index db8deafe896b..3dd936945735 100644
--- a/src/unix/linux_like/linux/gnu/b64/riscv64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/riscv64/mod.rs
@@ -3,7 +3,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = u8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type wchar_t = c_int;
diff --git a/src/unix/linux_like/linux/gnu/b64/s390x.rs b/src/unix/linux_like/linux/gnu/b64/s390x.rs
index 95dacc9f91cb..d5ab89a86fc3 100644
--- a/src/unix/linux_like/linux/gnu/b64/s390x.rs
+++ b/src/unix/linux_like/linux/gnu/b64/s390x.rs
@@ -4,7 +4,6 @@ use crate::prelude::*;
 use crate::{off64_t, off_t, pthread_mutex_t};
 
 pub type blksize_t = i64;
-pub type c_char = u8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type nlink_t = u64;
diff --git a/src/unix/linux_like/linux/gnu/b64/sparc64/mod.rs b/src/unix/linux_like/linux/gnu/b64/sparc64/mod.rs
index 5626cd3e4693..b9f9485de1e3 100644
--- a/src/unix/linux_like/linux/gnu/b64/sparc64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/sparc64/mod.rs
@@ -5,7 +5,6 @@ use crate::{off64_t, off_t, pthread_mutex_t};
 
 pub type c_long = i64;
 pub type c_ulong = u64;
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type nlink_t = u32;
 pub type blksize_t = i64;
diff --git a/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs b/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
index 0d9971252391..a0dbb99ed76d 100644
--- a/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
@@ -3,7 +3,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type nlink_t = u64;
 pub type blksize_t = i64;
diff --git a/src/unix/linux_like/linux/musl/b32/arm/mod.rs b/src/unix/linux_like/linux/musl/b32/arm/mod.rs
index 3116837322b6..5829b0270d69 100644
--- a/src/unix/linux_like/linux/musl/b32/arm/mod.rs
+++ b/src/unix/linux_like/linux/musl/b32/arm/mod.rs
@@ -1,7 +1,6 @@
 use crate::off_t;
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type wchar_t = u32;
 
 s! {
diff --git a/src/unix/linux_like/linux/musl/b32/hexagon.rs b/src/unix/linux_like/linux/musl/b32/hexagon.rs
index 9becabd146f8..61174fbd408d 100644
--- a/src/unix/linux_like/linux/musl/b32/hexagon.rs
+++ b/src/unix/linux_like/linux/musl/b32/hexagon.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type stat64 = crate::stat;
 
diff --git a/src/unix/linux_like/linux/musl/b32/mips/mod.rs b/src/unix/linux_like/linux/musl/b32/mips/mod.rs
index aacdc4457949..56418ededd38 100644
--- a/src/unix/linux_like/linux/musl/b32/mips/mod.rs
+++ b/src/unix/linux_like/linux/musl/b32/mips/mod.rs
@@ -1,7 +1,6 @@
 use crate::off_t;
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type wchar_t = c_int;
 
 s! {
diff --git a/src/unix/linux_like/linux/musl/b32/powerpc.rs b/src/unix/linux_like/linux/musl/b32/powerpc.rs
index 29e797959123..de2c5d5e3f72 100644
--- a/src/unix/linux_like/linux/musl/b32/powerpc.rs
+++ b/src/unix/linux_like/linux/musl/b32/powerpc.rs
@@ -1,7 +1,6 @@
 use crate::off_t;
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type wchar_t = i32;
 
 s! {
diff --git a/src/unix/linux_like/linux/musl/b32/riscv32/mod.rs b/src/unix/linux_like/linux/musl/b32/riscv32/mod.rs
index ff5839c64bc4..291dc7ec644d 100644
--- a/src/unix/linux_like/linux/musl/b32/riscv32/mod.rs
+++ b/src/unix/linux_like/linux/musl/b32/riscv32/mod.rs
@@ -3,7 +3,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = u8;
 pub type wchar_t = c_int;
 
 s! {
diff --git a/src/unix/linux_like/linux/musl/b32/x86/mod.rs b/src/unix/linux_like/linux/musl/b32/x86/mod.rs
index 476bacdb6b88..5b947f38d99f 100644
--- a/src/unix/linux_like/linux/musl/b32/x86/mod.rs
+++ b/src/unix/linux_like/linux/musl/b32/x86/mod.rs
@@ -1,7 +1,6 @@
 use crate::off_t;
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 
 s! {
diff --git a/src/unix/linux_like/linux/musl/b64/aarch64/mod.rs b/src/unix/linux_like/linux/musl/b64/aarch64/mod.rs
index c660ec5c3453..e84b9f563c66 100644
--- a/src/unix/linux_like/linux/musl/b64/aarch64/mod.rs
+++ b/src/unix/linux_like/linux/musl/b64/aarch64/mod.rs
@@ -1,7 +1,6 @@
 use crate::off_t;
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type __u64 = c_ulonglong;
 pub type __s64 = c_longlong;
 pub type wchar_t = u32;
diff --git a/src/unix/linux_like/linux/musl/b64/loongarch64/mod.rs b/src/unix/linux_like/linux/musl/b64/loongarch64/mod.rs
index 1be59ada9aad..36f05e10e6ea 100644
--- a/src/unix/linux_like/linux/musl/b64/loongarch64/mod.rs
+++ b/src/unix/linux_like/linux/musl/b64/loongarch64/mod.rs
@@ -3,7 +3,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = i8;
 pub type wchar_t = c_int;
 
 pub type nlink_t = c_uint;
diff --git a/src/unix/linux_like/linux/musl/b64/mips64.rs b/src/unix/linux_like/linux/musl/b64/mips64.rs
index 09191a5f8275..0ce7e932a2db 100644
--- a/src/unix/linux_like/linux/musl/b64/mips64.rs
+++ b/src/unix/linux_like/linux/musl/b64/mips64.rs
@@ -1,7 +1,6 @@
 use crate::off_t;
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type __u64 = c_ulong;
 pub type __s64 = c_long;
diff --git a/src/unix/linux_like/linux/musl/b64/powerpc64.rs b/src/unix/linux_like/linux/musl/b64/powerpc64.rs
index 3753293c8e0c..f85e2748b184 100644
--- a/src/unix/linux_like/linux/musl/b64/powerpc64.rs
+++ b/src/unix/linux_like/linux/musl/b64/powerpc64.rs
@@ -1,7 +1,6 @@
 use crate::off_t;
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type wchar_t = i32;
 pub type __u64 = c_ulong;
 pub type __s64 = c_long;
diff --git a/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs b/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs
index ec0ba4c1f926..2b9b394d51d1 100644
--- a/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs
+++ b/src/unix/linux_like/linux/musl/b64/riscv64/mod.rs
@@ -3,7 +3,6 @@
 use crate::prelude::*;
 use crate::{off64_t, off_t};
 
-pub type c_char = u8;
 pub type wchar_t = c_int;
 
 pub type nlink_t = c_uint;
diff --git a/src/unix/linux_like/linux/musl/b64/s390x.rs b/src/unix/linux_like/linux/musl/b64/s390x.rs
index 22a6cec4185f..25f49fc15534 100644
--- a/src/unix/linux_like/linux/musl/b64/s390x.rs
+++ b/src/unix/linux_like/linux/musl/b64/s390x.rs
@@ -2,7 +2,6 @@ use crate::off_t;
 use crate::prelude::*;
 
 pub type blksize_t = i64;
-pub type c_char = u8;
 pub type nlink_t = u64;
 pub type wchar_t = i32;
 pub type greg_t = u64;
diff --git a/src/unix/linux_like/linux/musl/b64/x86_64/mod.rs b/src/unix/linux_like/linux/musl/b64/x86_64/mod.rs
index 6399f33209ac..b8f659b72392 100644
--- a/src/unix/linux_like/linux/musl/b64/x86_64/mod.rs
+++ b/src/unix/linux_like/linux/musl/b64/x86_64/mod.rs
@@ -1,7 +1,6 @@
 use crate::off_t;
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type nlink_t = u64;
 pub type blksize_t = c_long;
diff --git a/src/unix/linux_like/linux/uclibc/arm/mod.rs b/src/unix/linux_like/linux/uclibc/arm/mod.rs
index da3203f98a3d..cbeedb51630f 100644
--- a/src/unix/linux_like/linux/uclibc/arm/mod.rs
+++ b/src/unix/linux_like/linux/uclibc/arm/mod.rs
@@ -1,7 +1,6 @@
 use crate::off64_t;
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type wchar_t = c_uint;
 pub type c_long = i32;
 pub type c_ulong = u32;
diff --git a/src/unix/linux_like/linux/uclibc/mips/mips32/mod.rs b/src/unix/linux_like/linux/uclibc/mips/mips32/mod.rs
index 6118928312b9..049b987fcd98 100644
--- a/src/unix/linux_like/linux/uclibc/mips/mips32/mod.rs
+++ b/src/unix/linux_like/linux/uclibc/mips/mips32/mod.rs
@@ -1,7 +1,6 @@
 use crate::off64_t;
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type c_long = i32;
 pub type c_ulong = u32;
 pub type clock_t = i32;
diff --git a/src/unix/linux_like/linux/uclibc/mips/mips64/mod.rs b/src/unix/linux_like/linux/uclibc/mips/mips64/mod.rs
index 86ee7bdff472..d0a0f345546b 100644
--- a/src/unix/linux_like/linux/uclibc/mips/mips64/mod.rs
+++ b/src/unix/linux_like/linux/uclibc/mips/mips64/mod.rs
@@ -3,7 +3,6 @@ use crate::prelude::*;
 
 pub type blkcnt_t = i64;
 pub type blksize_t = i64;
-pub type c_char = i8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type fsblkcnt_t = c_ulong;
diff --git a/src/unix/linux_like/linux/uclibc/x86_64/mod.rs b/src/unix/linux_like/linux/uclibc/x86_64/mod.rs
index 709b0d152444..8a363d558257 100644
--- a/src/unix/linux_like/linux/uclibc/x86_64/mod.rs
+++ b/src/unix/linux_like/linux/uclibc/x86_64/mod.rs
@@ -6,7 +6,6 @@ use crate::prelude::*;
 pub type blkcnt_t = i64;
 pub type blksize_t = i64;
 pub type clock_t = i64;
-pub type c_char = i8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type fsblkcnt_t = c_ulong;
diff --git a/src/unix/newlib/aarch64/mod.rs b/src/unix/newlib/aarch64/mod.rs
index 0aa1de7dcc82..f0ab09443da2 100644
--- a/src/unix/newlib/aarch64/mod.rs
+++ b/src/unix/newlib/aarch64/mod.rs
@@ -1,7 +1,6 @@
 use crate::prelude::*;
 
 pub type clock_t = c_long;
-pub type c_char = u8;
 pub type wchar_t = u32;
 
 pub type c_long = i64;
diff --git a/src/unix/newlib/arm/mod.rs b/src/unix/newlib/arm/mod.rs
index a32e37ede596..ae89440f237d 100644
--- a/src/unix/newlib/arm/mod.rs
+++ b/src/unix/newlib/arm/mod.rs
@@ -1,7 +1,6 @@
 use crate::prelude::*;
 
 pub type clock_t = c_long;
-pub type c_char = u8;
 pub type wchar_t = u32;
 
 pub type c_long = i32;
diff --git a/src/unix/newlib/espidf/mod.rs b/src/unix/newlib/espidf/mod.rs
index 1ac5113c917b..0bb8e3ae9c76 100644
--- a/src/unix/newlib/espidf/mod.rs
+++ b/src/unix/newlib/espidf/mod.rs
@@ -1,7 +1,6 @@
 use crate::prelude::*;
 
 pub type clock_t = c_ulong;
-pub type c_char = u8;
 pub type wchar_t = u32;
 
 pub type c_long = i32;
diff --git a/src/unix/newlib/horizon/mod.rs b/src/unix/newlib/horizon/mod.rs
index 8c662f2a4517..05a1b284e295 100644
--- a/src/unix/newlib/horizon/mod.rs
+++ b/src/unix/newlib/horizon/mod.rs
@@ -3,7 +3,6 @@
 use crate::off_t;
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type c_long = i32;
 pub type c_ulong = u32;
 
diff --git a/src/unix/newlib/powerpc/mod.rs b/src/unix/newlib/powerpc/mod.rs
index 6a9c42bdb722..b53c832a71ae 100644
--- a/src/unix/newlib/powerpc/mod.rs
+++ b/src/unix/newlib/powerpc/mod.rs
@@ -1,7 +1,6 @@
 use crate::prelude::*;
 
 pub type clock_t = c_ulong;
-pub type c_char = u8;
 pub type wchar_t = c_int;
 
 pub type c_long = i32;
diff --git a/src/unix/newlib/vita/mod.rs b/src/unix/newlib/vita/mod.rs
index 1a8c89319fa2..1f531cb4d35f 100644
--- a/src/unix/newlib/vita/mod.rs
+++ b/src/unix/newlib/vita/mod.rs
@@ -3,7 +3,6 @@ use crate::prelude::*;
 
 pub type clock_t = c_long;
 
-pub type c_char = u8;
 pub type wchar_t = u32;
 
 pub type c_long = i32;
diff --git a/src/unix/nto/aarch64.rs b/src/unix/nto/aarch64.rs
index d0987f28be6b..acc36bbf7536 100644
--- a/src/unix/nto/aarch64.rs
+++ b/src/unix/nto/aarch64.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type c_long = i64;
 pub type c_ulong = u64;
diff --git a/src/unix/nto/x86_64.rs b/src/unix/nto/x86_64.rs
index 425f47994946..6cd24e187c44 100644
--- a/src/unix/nto/x86_64.rs
+++ b/src/unix/nto/x86_64.rs
@@ -1,6 +1,5 @@
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type wchar_t = u32;
 pub type c_long = i64;
 pub type c_ulong = u64;
diff --git a/src/unix/nuttx/mod.rs b/src/unix/nuttx/mod.rs
index ed3e1ed8bfa3..bf6efdd7ae36 100644
--- a/src/unix/nuttx/mod.rs
+++ b/src/unix/nuttx/mod.rs
@@ -1,4 +1,3 @@
-pub use crate::arch::c_char_def as c_char;
 use crate::prelude::*;
 use crate::{in6_addr, in_addr_t, timespec, DIR};
 
diff --git a/src/unix/redox/mod.rs b/src/unix/redox/mod.rs
index c55750922443..7b918494c72c 100644
--- a/src/unix/redox/mod.rs
+++ b/src/unix/redox/mod.rs
@@ -1,4 +1,3 @@
-pub use crate::arch::c_char_def as c_char;
 use crate::prelude::*;
 
 pub type wchar_t = i32;
diff --git a/src/unix/solarish/mod.rs b/src/unix/solarish/mod.rs
index 0f398ca44826..9def117803e5 100644
--- a/src/unix/solarish/mod.rs
+++ b/src/unix/solarish/mod.rs
@@ -1,6 +1,5 @@
 use core::mem::size_of;
 
-pub use crate::arch::c_char_def as c_char;
 use crate::prelude::*;
 
 pub type c_long = i64;
diff --git a/src/vxworks/aarch64.rs b/src/vxworks/aarch64.rs
index 4032488b6c0d..630c7db54b55 100644
--- a/src/vxworks/aarch64.rs
+++ b/src/vxworks/aarch64.rs
@@ -1,4 +1,3 @@
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type c_long = i64;
 pub type c_ulong = u64;
diff --git a/src/vxworks/arm.rs b/src/vxworks/arm.rs
index 55240068aa08..01fc7262f03e 100644
--- a/src/vxworks/arm.rs
+++ b/src/vxworks/arm.rs
@@ -1,4 +1,3 @@
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type c_long = i32;
 pub type c_ulong = u32;
diff --git a/src/vxworks/powerpc.rs b/src/vxworks/powerpc.rs
index 55240068aa08..01fc7262f03e 100644
--- a/src/vxworks/powerpc.rs
+++ b/src/vxworks/powerpc.rs
@@ -1,4 +1,3 @@
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type c_long = i32;
 pub type c_ulong = u32;
diff --git a/src/vxworks/powerpc64.rs b/src/vxworks/powerpc64.rs
index 4032488b6c0d..630c7db54b55 100644
--- a/src/vxworks/powerpc64.rs
+++ b/src/vxworks/powerpc64.rs
@@ -1,4 +1,3 @@
-pub type c_char = u8;
 pub type wchar_t = u32;
 pub type c_long = i64;
 pub type c_ulong = u64;
diff --git a/src/vxworks/riscv32.rs b/src/vxworks/riscv32.rs
index 40a8e338e83a..741e312afce1 100644
--- a/src/vxworks/riscv32.rs
+++ b/src/vxworks/riscv32.rs
@@ -1,4 +1,3 @@
-pub type c_char = u8;
 pub type wchar_t = i32;
 pub type c_long = i32;
 pub type c_ulong = u32;
diff --git a/src/vxworks/riscv64.rs b/src/vxworks/riscv64.rs
index ccd68b0c64f8..7bacd5c5abec 100644
--- a/src/vxworks/riscv64.rs
+++ b/src/vxworks/riscv64.rs
@@ -1,4 +1,3 @@
-pub type c_char = u8;
 pub type wchar_t = i32;
 pub type c_long = i64;
 pub type c_ulong = u64;
diff --git a/src/vxworks/x86.rs b/src/vxworks/x86.rs
index e617bb83c6ce..741e312afce1 100644
--- a/src/vxworks/x86.rs
+++ b/src/vxworks/x86.rs
@@ -1,4 +1,3 @@
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type c_long = i32;
 pub type c_ulong = u32;
diff --git a/src/vxworks/x86_64.rs b/src/vxworks/x86_64.rs
index 5e95ea2567dd..7bacd5c5abec 100644
--- a/src/vxworks/x86_64.rs
+++ b/src/vxworks/x86_64.rs
@@ -1,4 +1,3 @@
-pub type c_char = i8;
 pub type wchar_t = i32;
 pub type c_long = i64;
 pub type c_ulong = u64;
diff --git a/src/wasi/mod.rs b/src/wasi/mod.rs
index 5919d43b857b..909b33a20ac7 100644
--- a/src/wasi/mod.rs
+++ b/src/wasi/mod.rs
@@ -7,7 +7,6 @@ use core::iter::Iterator;
 
 use crate::prelude::*;
 
-pub type c_char = i8;
 pub type c_uchar = u8;
 pub type c_schar = i8;
 pub type c_int = i32;
diff --git a/src/windows/mod.rs b/src/windows/mod.rs
index 927f01f40978..6e343db53f02 100644
--- a/src/windows/mod.rs
+++ b/src/windows/mod.rs
@@ -22,7 +22,6 @@ pub type uintptr_t = usize;
 pub type ssize_t = isize;
 pub type sighandler_t = usize;
 
-pub type c_char = i8;
 pub type c_long = i32;
 pub type c_ulong = u32;
 pub type wchar_t = u16;
diff --git a/src/xous.rs b/src/xous.rs
index 4073349306fb..468865c8d413 100644
--- a/src/xous.rs
+++ b/src/xous.rs
@@ -20,7 +20,6 @@ pub type uintptr_t = usize;
 pub type ssize_t = isize;
 
 pub type off_t = i64;
-pub type c_char = u8;
 pub type c_long = i64;
 pub type c_ulong = u64;
 pub type wchar_t = u32;