[bug#55813] autogen: Use guile-3.0

[Vagrant Cascadian <vagrant@reproducible-builds.org>]

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Some relatively simply patches make autogen build with guile-3.0. Used
by both Debian an openSUSE, so already has a bit of field testing.

I'm not 100% sure that it wasn't just dumb luck, but it seemed like
building autogen with guile-3.0 was more likely to build reproducibly.

It did require adding automake and autoconf to inputs, seeming to detect
that something changed since configure was generated. Not sure if that
could be avoided by being cleverer, or if that is an acceptible change.


live well,
  vagrant

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From 9745d65234b70115a07d324f5514b125ad97369a Mon Sep 17 00:00:00 2001
From: Vagrant Cascadian <vagrant@reproducible-builds.org>
Date: Sun, 5 Jun 2022 16:05:02 -0700
Subject: [PATCH 3/3] gnu: autogen: Build with guile 3.0.

* gnu/packages/autogen.scm (autogen)[arguments]: Add 'support-guile-3.0 phase.
  [inputs]: Remove guile-2.2 and add automake, autoconf and guile-3.0.
---
 gnu/packages/autogen.scm | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/autogen.scm b/gnu/packages/autogen.scm
index d0c8df17ec..7e22167be5 100644
--- a/gnu/packages/autogen.scm
+++ b/gnu/packages/autogen.scm
@@ -25,6 +25,7 @@ (define-module (gnu packages autogen)
   #:use-module (guix download)
   #:use-module (guix build-system gnu)
   #:use-module (gnu packages)
+  #:use-module (gnu packages autotools)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages base)
@@ -49,7 +50,7 @@ (define-public autogen
             "def_bf[MAXNAMELEN + 10]")))))
     (build-system gnu-build-system)
     (native-inputs (list pkg-config which))
-    (inputs (list guile-2.2 perl))          ; for doc generator mdoc
+    (inputs (list automake autoconf guile-3.0 perl))          ; for doc generator mdoc
     (arguments
      '(#:configure-flags
        ;; XXX Needed to build 5.18.16.  ./configure fails without it:
@@ -62,6 +63,21 @@ (define-public autogen
 
        #:phases
        (modify-phases %standard-phases
+         (add-after 'unpack 'support-guile-3.0
+           ;; Upstream bug:
+           ;; https://sourceforge.net/p/autogen/bugs/196/
+           ;;
+           ;; Supported in Debian and openSUSE:
+           ;; https://salsa.debian.org/debian/autogen/-/blob/master/debian/patches/40_suse_04-guile-version.patch
+           (lambda _
+             (substitute*
+                 "agen5/guile-iface.h"
+               (("#elif GUILE_VERSION < 203000") "#elif GUILE_VERSION < 301000"))
+             (substitute*
+                 (list
+                  "configure"
+                  "config/guile.m4")
+               (("2.2 2.0 1.8") "3.0 2.2 2.0 1.8"))))
          (add-before 'build 'set-man-page-date
            ;; Avoid embedding the current date for reproducible builds
            (lambda _
-- 
2.35.1


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