[bug#50449] [PATCH] Add zig

[Andrew Patterson <andrewpatt7@gmail.com>]

---
Note that this is a minor version behind; zig 0.8.0 depends on all the
clang headers version 12.x, and the current version of lld is 11.x.

 gnu/packages/zig.scm | 73 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 gnu/packages/zig.scm

diff --git a/gnu/packages/zig.scm b/gnu/packages/zig.scm
new file mode 100644
index 0000000000..bb8af0c98d
--- /dev/null
+++ b/gnu/packages/zig.scm
@@ -0,0 +1,73 @@
+(define-module (gnu packages zig)
+  #:use-module (guix packages)
+  #:use-module (guix git-download)
+  #:use-module (guix build-system cmake)
+  #:use-module ((guix licenses) #:prefix l:)
+  #:use-module (guix build utils)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages llvm)
+  #:use-module (guix utils))
+
+;; Zig versions depend on specific LLVM major versions; should be able to update
+;; to 0.8.x with lld@12
+(define-public zig
+  (package
+    (name "zig")
+    (version "0.7.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/ziglang/zig")
+             (commit version)))
+       (sha256
+        (base32
+         "0gq8xjqr3n38i2adkv9vf936frac80wh72dvhh4m5s66yafmhphg"))))
+    (build-system cmake-build-system)
+    (inputs
+     `(("llvm" ,llvm-11)
+       ("clang-toolchain" ,clang-toolchain-11)
+       ("lld" ,lld))) ; is currently version 11
+    (arguments
+     `(#:tests? #f
+       #:phases (modify-phases %standard-phases
+                  (add-before 'install 'set-cachedir
+                    (lambda* _ ;; See [[https://github.com/ziglang/zig/issues/6810]]
+                      (setenv "XDG_CACHE_HOME" "/tmp/"))))))
+    (home-page "https://ziglang.org/")
+    (synopsis
+     "Programming language for maintaining robust, optimal, and reusable software")
+    (description
+     "Zig is a general-purpose programming language and toolchain for
+maintaining robust, optimal, and reusable software.
+
+⚡ A Simple Language
+
+Focus on debugging your application rather than debugging your programming
+language knowledge.
+@itemize @bullet
+@item No hidden control flow.
+@item No hidden memory allocations.
+@item No preprocessor, no macros.
+@end itemize
+
+⚡ Comptime
+
+A fresh approach to metaprogramming based on compile-time code execution and
+lazy evaluation.
+@itemize @bullet
+@item Call any function at compile-time.
+@item Manipulate types as values without runtime overhead.
+@item Comptime emulates the target architecture.
+@end itemize
+
+⚡ Performance Meets Safety
+
+Write fast, clear code capable of handling all error conditions.
+@itemize @bullet
+@item The language gracefully guides your error handling logic.
+@item Configurable runtime checks help you strike a balance between performance
+and safety guarantees.
+@item Take advantage of vector types to express SIMD instructions portably.
+@end itemize")
+    (license l:expat)))
-- 
2.33.0