games/albion: Fix build with Automake 1.16

This has been broken since a while when Automake 1.16 was introduced in
NixOS/nixpkgs@e0c155e26b6a73bba06d6f2ced12bd4bcb0d6503.

The upstream WildMIDI project has since moved to CMake and the patches
from the static recompilation project haven't been ported to a newer
version, so we're stuck with the Automake variant.

Fortunately, the fix is rather easy and it's more obvious when you look
at the changelog of Automake 1.16:

  The 'subdir-object' option no longer causes object files corresponding
  to source files specified with an explicit '$(srcdir)' component to be
  placed in the source tree rather than in the build tree.

  For example, if Makefile.am contains:

      AUTOMAKE_OPTIONS = subdir-objects
      foo_SOURCES = $(srcdir)/foo.c $(srcdir)/s/bar.c $(top_srcdir)/baz.c

  then "make all" will create 'foo.o' and 's/bar.o' in $(builddir)
  rather than in $(srcdir), and will create 'baz.o' in $(top_builddir)
  rather than in $(top_srcdir).

So all we need to do is strip off the absolute pathname of
libWildMidi.la/libWildMidiA.la and the build passes.

Signed-off-by: aszlig <aszlig@nix.build>

1 files changed, 4 insertions, 1 deletions

diff --git a/pkgs/games/gog/albion/default.nix b/pkgs/games/gog/albion/default.nix
index 8ecc6e6e..09b8d39a 100644
--- a/pkgs/games/gog/albion/default.nix
+++ b/pkgs/games/gog/albion/default.nix
@@ -23,7 +23,10 @@ let
     nativeBuildInputs = [ autoreconfHook ];
     buildInputs = [ alsaLib ];
     patches = [ ./wildmidi-build-fixes.patch ];
-    postPatch = "sed -i -e '/^CFLAGS/s/-pedantic//' configure.ac";
+    postPatch = ''
+      sed -i -e '/^CFLAGS/s/-pedantic//' configure.ac
+      sed -i -e '/^wildmidi_libs *=/s!\$(top_builddir)/src/!!' src/Makefile.am
+    '';
   };
 
   compileMidiPlugin = variant: let