03/03: gnu: exim: Build (more) reproducibly.

[guix-commits]

nckx pushed a commit to branch master
in repository guix.

commit bb335e84ed98055599752740a0f6114fe31f325d
Author: Tobias Geerinckx-Rice <address@hidden>
AuthorDate: Tue Jan 7 18:55:40 2020 +0100

    gnu: exim: Build (more) reproducibly.
    
    * gnu/packages/mail.scm (exim)[arguments]: Add a ‘build-reproducibly’
    phase.
---
 gnu/packages/mail.scm | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/mail.scm b/gnu/packages/mail.scm
index 30623d7..7d56949 100644
--- a/gnu/packages/mail.scm
+++ b/gnu/packages/mail.scm
@@ -1338,7 +1338,14 @@ delivery.")
              (let ((bash (assoc-ref inputs "bash")))
                (substitute* '("scripts/Configure-eximon")
                  (("#!/bin/sh") (string-append "#!" bash "/bin/sh"))))
-             #t)))
+             #t))
+         (add-before 'build 'build-reproducibly
+           (lambda _
+             ;; The ‘compilation number’ is incremented for every build from 
the
+             ;; same source tree.  It appears to vary over different 
(parallel?)
+             ;; builds.  Make it a ‘constant number’ instead.
+             (substitute* "src/version.c"
+               (("#include \"cnumber.h\"") "1")))))
        #:make-flags
        (list "CC=gcc"
              "INSTALL_ARG=-no_chown")