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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2012 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is 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 (gnu packages m4)
+ #:use-module (guix licenses)
+ #:use-module (distro)
+ #:use-module (guix packages)
+ #:use-module (guix download)
+ #:use-module (guix utils)
+ #:use-module (guix build-system gnu))
+
+(define-public m4
+ (package
+ (name "m4")
+ (version "1.4.16")
+ (source (origin
+ (method url-fetch)
+ (uri (string-append "mirror://gnu/m4/m4-"
+ version ".tar.bz2"))
+ (sha256
+ (base32
+ "035r7ma272j2cwni2961jp22k6bn3n9xwn3b3qbcn2yrvlghql22"))))
+ (build-system gnu-build-system)
+ (arguments (case-lambda
+ ((system)
+ ;; XXX: Disable tests on those platforms with know issues.
+ `(#:tests? ,(not (member system
+ '("x86_64-darwin"
+ "i686-cygwin"
+ "i686-sunos")))
+ #:patches (list (assoc-ref %build-inputs "patch/s_isdir")
+ (assoc-ref %build-inputs
+ "patch/readlink-EINVAL")
+ (assoc-ref %build-inputs "patch/gets"))
+ #:phases (alist-cons-before
+ 'check 'pre-check
+ (lambda* (#:key inputs #:allow-other-keys)
+ ;; Fix references to /bin/sh.
+ (let ((bash (assoc-ref inputs "bash")))
+ (for-each patch-shebang
+ (find-files "tests" "\\.sh$"))
+ (substitute* (find-files "tests"
+ "posix_spawn")
+ (("/bin/sh")
+ (format #f "~a/bin/bash" bash)))))
+ %standard-phases)))
+ ((system cross-system)
+ `(#:patches (list (assoc-ref %build-inputs "patch/s_isdir")
+ (assoc-ref %build-inputs
+ "patch/readlink-EINVAL")
+ (assoc-ref %build-inputs "patch/gets"))))))
+ (inputs `(("patch/s_isdir" ,(search-patch "m4-s_isdir.patch"))
+ ("patch/readlink-EINVAL"
+ ,(search-patch "m4-readlink-EINVAL.patch"))
+ ("patch/gets" ,(search-patch "m4-gets-undeclared.patch"))))
+ (synopsis "GNU M4, a macro processor")
+ (description
+ "GNU M4 is an implementation of the traditional Unix macro processor. It
+is mostly SVR4 compatible although it has some extensions (for example,
+handling more than 9 positional parameters to macros). GNU M4 also has
+built-in functions for including files, running shell commands, doing
+arithmetic, etc.
+
+GNU M4 is a macro processor in the sense that it copies its input to the
+output expanding macros as it goes. Macros are either builtin or
+user-defined and can take any number of arguments. Besides just doing macro
+expansion, m4 has builtin functions for including named files, running UNIX
+commands, doing integer arithmetic, manipulating text in various ways,
+recursion etc... m4 can be used either as a front-end to a compiler or as a
+macro processor in its own right.")
+ (license gpl3+)
+ (home-page "http://www.gnu.org/software/m4/")))