[gnome-code-assistance] Fix compilation with vala 0.36

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 508e157a08eda979683d130bd779792ee4d90d58
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Sun Nov 6 01:27:49 2016 -0800

    Fix compilation with vala 0.36
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772861

 backends/vala/Makefile.am           |    4 ++++
 backends/vala/valaoptionparser.vala |    4 ++++
 configure.ac                        |   25 +++++++++++++++++++++----
 3 files changed, 29 insertions(+), 4 deletions(-)
---
diff --git a/backends/vala/Makefile.am b/backends/vala/Makefile.am
index dc3d5e0..4799429 100644
--- a/backends/vala/Makefile.am
+++ b/backends/vala/Makefile.am
@@ -34,6 +34,10 @@ if ENABLE_DEBUG
 backends_vala_common_valaflags += --debug -X -O0
 endif
 
+if BACKENDS_VALA_ENABLE_VALA_CODE_CONTEXT_SET_THREAD
+backends_vala_common_valaflags += -D ENABLE_VALA_CODE_CONTEXT_SET_THREAD
+endif
+
 backends_vala_libvalashared_la_VALAFLAGS =     \
        $(backends_vala_common_valaflags)       \
        --library libvalashared                 \
diff --git a/backends/vala/valaoptionparser.vala b/backends/vala/valaoptionparser.vala
index 0aaad79..5ca5643 100644
--- a/backends/vala/valaoptionparser.vala
+++ b/backends/vala/valaoptionparser.vala
@@ -184,7 +184,11 @@ class OptionParser {
                context.gir_directories = realpaths(wd, gir_directories);
                context.metadata_directories = realpaths(wd, metadata_directories);
                context.debug = debug;
+
+#if ENABLE_VALA_CODE_CONTEXT_SET_THREAD
                context.thread = thread;
+#endif
+
                context.mem_profiler = mem_profiler;
                context.save_temps = save_temps;
 
diff --git a/configure.ac b/configure.ac
index 008c2ac..00bfc45 100644
--- a/configure.ac
+++ b/configure.ac
@@ -414,6 +414,7 @@ BACKEND_VALA_LIBVALA_VERSIONS="libvala-0.36 libvala-0.34 libvala-0.32 libvala-0.
 BACKEND_VALA_MODULES="gobject-2.0 >= 2.36 glib-2.0 >= 2.36 gio-2.0 >= 2.36 gee-0.8 gio-unix-2.0 >= 2.36"
 
 BACKEND_VALA_LIBVALA=
+
 for i in $BACKEND_VALA_LIBVALA_VERSIONS; do
        if test "x$BACKEND_VALA_LIBVALA" = "x"; then
                BACKEND_VALA_LIBVALA="$i"
@@ -428,10 +429,6 @@ for i in $BACKEND_VALA_LIBVALA_VERSIONS; do
        fi
 done
 
-if test "x$libvala_found" != "xyes"; then
-       BACKEND_VALA_MODULES="$BACKEND_VALA_MODULES $BACKEND_VALA_LIBVALA"
-fi
-
 AC_SUBST(BACKEND_VALA_LIBVALA)
 
 if test "x$enable_vala" != "xno"; then
@@ -467,9 +464,29 @@ if test "x$enable_vala" != "xno"; then
        fi
 fi
 
+# Check for deprecated threading support
+AS_IF([test x$enable_vala = xyes],[
+       cflags_save="${CFLAGS}"
+       libs_save="${LIBS}"
+       CFLAGS="${CFLAGS} ${BACKEND_VALA_CFLAGS}"
+       LIBS="${LIBS} ${BACKEND_VALA_LIBS}"
+
+       AC_MSG_CHECKING([if vala CodeContext supports thread property])
+
+       AC_TRY_LINK([#include <vala.h>],[
+               vala_code_context_set_thread (NULL, TRUE);
+       ], [have_vala_code_context_set_thread=yes], [have_vala_code_context_set_thread=no])
+
+       CFLAGS="${cflags_save}"
+       LIBS="${libs_save}"
+])
+AC_MSG_RESULT([$have_vala_code_context_set_thread])
+
 color_enable_var("$enable_vala", [enable_vala_msg])
 
 AM_CONDITIONAL(BACKENDS_VALA_ENABLE, test "x$enable_vala" = "xyes")
+AM_CONDITIONAL(BACKENDS_VALA_ENABLE_VALA_CODE_CONTEXT_SET_THREAD, test x$have_vala_code_context_set_thread = 
xyes)
+
 AC_SUBST(BACKEND_VALA_LIBVALA)