Add windows feature and make unix imply generic

Cargo.toml

@@ -35,7 +35,10 @@ unix = [
   "uptime",
   "users",
   "who",
+
+  "generic"
 ]
+windows = ["generic"]
 # Feature "fuchsia" contains the exclusive list of utilities
 # that can be compiled and run on Fuchsia. Should be built
 # with --no-default-features when selecting this feature.
@@ -149,7 +152,7 @@ redox = [
 ]
 test_unimplemented = []
 nightly = []
-default = ["generic", "unix"]
+default = ["unix"]
 
 [workspace]
 

README.md

@@ -33,8 +33,6 @@ Requirements
 
 * Rust (`cargo`, `rustc`)
 * GNU Make (required to build documentation)
-* CMake (Unix; used by Oniguruma, which is required for `expr`)
-* NMake (Windows; used by Oniguruma, which is required for `expr`)
 * [Sphinx](http://www.sphinx-doc.org/) (for documentation)
 * gzip (for installing documentation)
 
@@ -72,7 +70,7 @@ Unix-like platforms at the moment, to build on Windows, you must do the
 following:
 ```bash
 # to keep debug information, compile without --release
-$ cargo build --release --no-default-features --features generic
+$ cargo build --release --no-default-features --features windows
 ```
 
 If you don't want to build every utility available on your platform into the

build.rs

@@ -16,7 +16,7 @@ pub fn main() {
         if val == "1" && key.starts_with(feature_prefix) {
             let krate = key[feature_prefix.len()..].to_lowercase();
             match krate.as_ref() {
-                "default" | "unix" | "redox" | "redox_generic" | "fuchsia" | "generic"
+                "default" | "unix" | "redox" | "redox_generic" | "fuchsia" | "generic" | "windows"
                 | "nightly" | "test_unimplemented" => continue,
                 _ => {}
             }