e.g. ``` cargo:rerun-if-env-changed=LIBZ_SYS_STAT...
# development
a
e.g.
Copy code
cargo:rerun-if-env-changed=LIBZ_SYS_STATIC
  cargo:rerun-if-changed=<http://build.rs|build.rs>
  TARGET = Some("x86_64-apple-darwin")
  OPT_LEVEL = Some("0")
  HOST = Some("x86_64-apple-darwin")
  CC_x86_64-apple-darwin = None
  CC_x86_64_apple_darwin = None
  HOST_CC = None
  CC = Some("/usr/bin/cc")
  CFLAGS_x86_64-apple-darwin = None
  CFLAGS_x86_64_apple_darwin = None
  HOST_CFLAGS = None
  CFLAGS = Some("-Wno-error")
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some("true")
  CARGO_CFG_TARGET_FEATURE = Some("fxsr,sse,sse2,sse3,ssse3")