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Hello,

when building gnutls 3.6.9 with e.g. ./configure [...] --prefix=/usr [...] --libdir=\${prefix}/lib/x86_64-linux-gnu--libexecdir=\${prefix}/lib/x86_64-linux-gnu one ends up with essentially the following list of files:

/usr/share/guile/site/2.2/gnutls.scm
/usr/lib/x86_64-linux-gnu/guile/2.2/site-ccache/gnutls.go
/usr/lib/x86_64-linux-gnu/guile/2.2/extensions/guile-gnutls-v-2.so.0
/usr/lib/x86_64-linux-gnu/guile/2.2/extensions/guile-gnutls-v-2.so
/usr/lib/x86_64-linux-gnu/guile/2.2/extensions/guile-gnutls-v-2.so.0.0.0

and /usr/share/guile/site/2.2/gnutls.scm contains

(eval-when (expand load eval)
  (define %libdir
    (or (getenv "GNUTLS_GUILE_EXTENSION_DIR")
        "/usr/lib/x86_64-linux-gnu/guile/2.2/extensions"))

  (load-extension (string-append %libdir "/guile-gnutls-v-2")
                  "scm_init_gnutls"))

i.e. we have a file in /usr/share ("architecture independent data") whose contents are not identical on different architectures.

This is a long-standing issue (see https://bugs.debian.org/658110) but is supposed to be fixable in guile-2.0 and later.