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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2022 Pierre Langlois <pierre.langlois@gmx.com>
;;;
;;; This file is not part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (nongnu packages wasm)
#:use-module (guix gexp)
#:use-module (guix packages)
#:use-module ((guix licenses) #:prefix license:)
#:use-module (guix utils)
#:use-module (guix git-download)
#:use-module (guix build-system gnu)
#:use-module (gnu packages llvm))
(define-public wasi-libc
(let ((commit "ad5133410f66b93a2381db5b542aad5e0964db96")
(revision "1"))
(package
(name "wasi-libc")
(version (git-version "0.1-alpha" revision commit))
(source (origin
(method git-fetch)
(uri (git-reference
(url "https://github.com/WebAssembly/wasi-libc")
(commit commit)
(recursive? #t)))
(file-name (git-file-name name version))
(sha256
(base32
"146jamq2q24vxjfpcwlqj84wzc80cbpbg0ns2wimyvzbanah48j6"))))
(build-system gnu-build-system)
(native-inputs (list clang-13))
(arguments
(list #:tests? #f ;No test suite
#:phases
#~(modify-phases %standard-phases
(delete 'configure)
(add-before 'build 'set-sysroot-include
(lambda _
(setenv "C_INCLUDE_PATH"
(string-append (getcwd) "/sysroot/include"))))
(add-before 'install 'set-install-dir
(lambda _
(setenv "INSTALL_DIR"
(string-append #$output "/wasm32-wasi")))))))
(home-page "https://wasi.dev")
(synopsis "WASI libc implementation for WebAssembly")
(description
"WASI Libc is a libc for WebAssembly programs built on top of WASI
system calls. It provides a wide array of POSIX-compatible C APIs, including
support for standard I/O, file I/O, filesystem manipulation, memory
management, time, string, environment variables, program startup, and many
other APIs.")
(license (list
;; For wasi-libc, with LLVM exceptions
license:asl2.0
;; For malloc.c.
license:cc0
;; For cloudlibc.
license:bsd-2
;; For wasi-libc and musl-libc.
license:expat)))))
(define-public wasm32-wasi-clang-runtime
(package (inherit clang-runtime-13)
(native-inputs
(list clang-13
wasi-libc))
(inputs (list llvm-13))
(arguments
(list
#:build-type "Release"
#:tests? #f
;; Stripping binaries breaks wasm linking, resulting in the following
;; error: "archive has no index; run ranlib to add one".
#:strip-binaries? #f
#:configure-flags
#~(list "-DCMAKE_C_COMPILER=clang"
"-DCMAKE_C_COMPILER_TARGET=wasm32-wasi"
(string-append
"-DCMAKE_SYSROOT=" #$wasi-libc "/wasm32-wasi")
(string-append
"-DCMAKE_C_FLAGS=-I " #$wasi-libc "/wasm32-wasi/include")
"-DCOMPILER_RT_OS_DIR=wasi"
"-DCOMPILER_RT_BAREMETAL_BUILD=On"
"-DCOMPILER_RT_DEFAULT_TARGET_ONLY=On"
;; WASM only needs libclang_rt.builtins-wasm32.a from
;; compiler-rt.
(string-append "../compiler-rt-"
#$(package-version clang-runtime-13)
".src/lib/builtins"))))))
;; FIXME: Ideally we wouldn't need to build a separate compiler because clang
;; can support multiple targets at runtime. However Guix patches the default
;; clang with a specific clang-runtime package. It would be good to improve
;; upstream Guix's support for cross-compiling with clang.
(define clang-from-llvm (@@ (gnu packages llvm) clang-from-llvm))
(define-public wasm32-wasi-clang
(let ((base (clang-from-llvm llvm-13 wasm32-wasi-clang-runtime
"0zp1p6syii5iajm8v2c207s80arv00yz5ckfwimn5dng0sxiqqax")))
(package (inherit base)
(name "wasm32-wasi-clang")
(inputs
(modify-inputs (package-inputs base)
(prepend wasi-libc)))
(arguments
(substitute-keyword-arguments (package-arguments base)
((#:configure-flags flags)
#~(list "-DCLANG_INCLUDE_TESTS=True"
;; Use a sane default include directory.
(string-append "-DC_INCLUDE_DIRS="
#$wasi-libc
"/wasm32-wasi/include")))
((#:phases phases)
`(modify-phases ,phases
(delete 'symlink-cfi_ignorelist))))))))
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