libz-sys aarch64-apple-ios compile failure

gistfile1.txt

$ cargo build --release --target=aarch64-apple-ios
   Compiling cc v1.0.25
   Compiling pkg-config v0.3.14
   Compiling libc v0.2.43
   Compiling libz-sys v1.0.21 (file:///Users/jot/libz-sys)
error: failed to run custom build command for `libz-sys v1.0.21 (file:///Users/jot/libz-sys)`
process didn't exit successfully: `/Users/jot/libz-sys/target/release/build/libz-sys-830cfa7a396b97c0/build-script-build` (exit code: 101)
--- stdout
cargo:rerun-if-env-changed=LIBZ_SYS_STATIC
cargo:rerun-if-changed=build.rs
TARGET = Some("aarch64-apple-ios")
OPT_LEVEL = Some("3")
HOST = Some("x86_64-apple-darwin")
CC_aarch64-apple-ios = None
CC_aarch64_apple_ios = None
TARGET_CC = None
CC = None
CROSS_COMPILE = None
CFLAGS_aarch64-apple-ios = None
CFLAGS_aarch64_apple_ios = None
TARGET_CFLAGS = None
CFLAGS = None
DEBUG = Some("false")
Detecting iOS SDK path for iphoneos
running: "cc" "-O3" "-fPIC" "-arch" "arm64" "-miphoneos-version-min=7.0" "-isysroot" "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.0.sdk" "-fembed-bitcode" "-I" "src/zlib" "-DSTDC" "-D_LARGEFILE64_SOURCE" "-D_POSIX_SOURCE" "-o" "/Users/jot/libz-sys/target/aarch64-apple-ios/release/build/libz-sys-0d2900ef1b0f529c/out/build/src/zlib/adler32.o" "-c" "src/zlib/adler32.c"
exit code: 0
Detecting iOS SDK path for iphoneos
running: "cc" "-O3" "-fPIC" "-arch" "arm64" "-miphoneos-version-min=7.0" "-isysroot" "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.0.sdk" "-fembed-bitcode" "-I" "src/zlib" "-DSTDC" "-D_LARGEFILE64_SOURCE" "-D_POSIX_SOURCE" "-o" "/Users/jot/libz-sys/target/aarch64-apple-ios/release/build/libz-sys-0d2900ef1b0f529c/out/build/src/zlib/compress.o" "-c" "src/zlib/compress.c"
exit code: 0
Detecting iOS SDK path for iphoneos
running: "cc" "-O3" "-fPIC" "-arch" "arm64" "-miphoneos-version-min=7.0" "-isysroot" "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.0.sdk" "-fembed-bitcode" "-I" "src/zlib" "-DSTDC" "-D_LARGEFILE64_SOURCE" "-D_POSIX_SOURCE" "-o" "/Users/jot/libz-sys/target/aarch64-apple-ios/release/build/libz-sys-0d2900ef1b0f529c/out/build/src/zlib/crc32.o" "-c" "src/zlib/crc32.c"
exit code: 0
Detecting iOS SDK path for iphoneos
running: "cc" "-O3" "-fPIC" "-arch" "arm64" "-miphoneos-version-min=7.0" "-isysroot" "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.0.sdk" "-fembed-bitcode" "-I" "src/zlib" "-DSTDC" "-D_LARGEFILE64_SOURCE" "-D_POSIX_SOURCE" "-o" "/Users/jot/libz-sys/target/aarch64-apple-ios/release/build/libz-sys-0d2900ef1b0f529c/out/build/src/zlib/deflate.o" "-c" "src/zlib/deflate.c"
exit code: 0
Detecting iOS SDK path for iphoneos
running: "cc" "-O3" "-fPIC" "-arch" "arm64" "-miphoneos-version-min=7.0" "-isysroot" "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.0.sdk" "-fembed-bitcode" "-I" "src/zlib" "-DSTDC" "-D_LARGEFILE64_SOURCE" "-D_POSIX_SOURCE" "-o" "/Users/jot/libz-sys/target/aarch64-apple-ios/release/build/libz-sys-0d2900ef1b0f529c/out/build/src/zlib/gzclose.o" "-c" "src/zlib/gzclose.c"
exit code: 0
Detecting iOS SDK path for iphoneos
running: "cc" "-O3" "-fPIC" "-arch" "arm64" "-miphoneos-version-min=7.0" "-isysroot" "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.0.sdk" "-fembed-bitcode" "-I" "src/zlib" "-DSTDC" "-D_LARGEFILE64_SOURCE" "-D_POSIX_SOURCE" "-o" "/Users/jot/libz-sys/target/aarch64-apple-ios/release/build/libz-sys-0d2900ef1b0f529c/out/build/src/zlib/gzlib.o" "-c" "src/zlib/gzlib.c"
cargo:warning=src/zlib/gzlib.c:214:15: error: implicitly declaring library function 'snprintf' with type 'int (char *, unsigned long, const char *, ...)' [-Werror,-Wimplicit-function-declaration]
cargo:warning=        (void)snprintf(state->path, len + 1, "%s", (const char *)path);
cargo:warning=              ^
cargo:warning=src/zlib/gzlib.c:214:15: note: include the header <stdio.h> or explicitly provide a declaration for 'snprintf'
cargo:warning=1 error generated.
exit code: 1

--- stderr
thread 'main' panicked at '

Internal error occurred: Command "cc" "-O3" "-fPIC" "-arch" "arm64" "-miphoneos-version-min=7.0" "-isysroot" "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS12.0.sdk" "-fembed-bitcode" "-I" "src/zlib" "-DSTDC" "-D_LARGEFILE64_SOURCE" "-D_POSIX_SOURCE" "-o" "/Users/jot/libz-sys/target/aarch64-apple-ios/release/build/libz-sys-0d2900ef1b0f529c/out/build/src/zlib/gzlib.o" "-c" "src/zlib/gzlib.c" with args "cc" did not execute successfully (status code exit code: 1).

', /Users/jot/.cargo/registry/src/github.com-1ecc6299db9ec823/cc-1.0.25/src/lib.rs:2260:5
note: Run with `RUST_BACKTRACE=1` for a backtrace.