On 2024-02-28, Helmut Grohne wrote:
> guile-lib actually does cross build, but we still track it as cross
> build failure, because the resulting package contains a build
> architecture multiarch tuple and that trips post-build sanity checks.

I am surprised that it actually cross builds at all... for me with or
without your patch, it still fails on configure:

  configure: exit 1
  dh_auto_configure: error: cd debian/build/guile-3.0 && ../../../configure 
--build=x86_64-linux-gnu --prefix=/usr --includedir=\${prefix}
  /include --mandir=\${prefix}/share/man --infodir=\${prefix}/share/info 
--sysconfdir=/etc --localstatedir=/var --disable-option-checking
  --disable-silent-rules --libdir=\${prefix}/lib/aarch64-linux-gnu 
--runstatedir=/run --disable-maintainer-mode --disable-dependency-track
  ing --host=aarch64-linux-gnu --with-guile-site=yes 
GUILE_EFFECTIVE_VERSION=3.0 GUILE=/usr/bin/guile-3.0 GUILD=/usr/bin/guild-3.0 
returne
  d exit code 1


live well,
  vagrant
>
> The root cause of the failure lies in the way the ccache directory is
> determined. There are actually several ways this is being done during
> configure - some of which work correctly - and ultimately, the last
> attempt using GUILE_SITE_CCACHE_DIR gets to set the value wrongly.
> Surprisingly, there already is a more complete and working
> implementation GUILE_SITE_DIR and simply reusing that makes it compute
> the ccache directory correctly. Is the attached patch acceptable?



>
> Helmut
> --- guile-lib-0.2.7.orig/m4/guile-ext.m4
> +++ guile-lib-0.2.7/m4/guile-ext.m4
> @@ -63,12 +63,4 @@
>  # The variable is marked for substitution, as by @code{AC_SUBST}.
>  #
>  AC_DEFUN([GUILE_SITE_CCACHE_DIR],
> - [AC_REQUIRE([GUILE_PROGS])
> -  AC_MSG_CHECKING(for Guile site ccache directory)
> -  GUILE_SITE_CCACHE=`$GUILE -c "(display (%site-ccache-dir))"`
> -  if test "$GUILE_SITE_CCACHE" = ""; then
> -     AC_MSG_FAILURE(site ccache dir not found)
> -  fi
> -  AC_MSG_RESULT($GUILE_SITE_CCACHE)
> -  AC_SUBST(GUILE_SITE_CCACHE)
> - ])
> + [AC_REQUIRE([GUILE_SITE_DIR])])

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