[tracker] build: Add generated enumeration files to BUILT_SOURCES

[Emmanuele Bassi <ebassi src gnome org>]

commit 50dc250aa3075eead9cdd72843a82f8c4a6f3df5
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sun Jul 16 13:07:12 2017 +0100

    build: Add generated enumeration files to BUILT_SOURCES
    
    Dependency tracking in Automake is a side effect of compilation. This
    means two things:
    
      * headers are ignored when it comes to building dependencies, even
        when listed inside sources for a binary target
      * generated headers included inside source files are not used
        as a dependency until compilation of the source file completes
        successfully
    
    If binary target L depends on a source file C, and that source file
    includes a generated header H, there is no guarantee that the header
    H will be available by the time source file C is built, because the
    dependency is extracted from C itself, not from the list of sources.
    Additionally, any header H does not count towards the dependency
    resolution because headers are only used for ancillary features, like
    extracting tags.
    
    For this reason, Automake has `BUILT_SOURCES`.
    
    This is a bit of obscure corner of Automake that trips up many who are
    not practitioners of the Dark Arts.
    
    More information is available here:
    
    https://www.gnu.org/software/automake/manual/html_node/Built-Sources-Example.html#Built-Sources-Example

 src/libtracker-sparql/Makefile.am |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/libtracker-sparql/Makefile.am b/src/libtracker-sparql/Makefile.am
index 5a96f81..34cc893 100644
--- a/src/libtracker-sparql/Makefile.am
+++ b/src/libtracker-sparql/Makefile.am
@@ -102,7 +102,8 @@ vapi_DATA =                                            \
        tracker-sparql-$(TRACKER_API_VERSION).deps
 
 BUILT_SOURCES =                                        \
-       libtracker_sparql_intermediate_vala_la_vala.stamp
+       libtracker_sparql_intermediate_vala_la_vala.stamp \
+       $(ENUM_SOURCES)
 
 MAINTAINERCLEANFILES =                                 \
        tracker-sparql-$(TRACKER_API_VERSION).vapi     \