[FYI] {branch-1.13.2} vala tests: skip in a cross compiler setup

[Stefano Lattarini]

The "vala + pkg-config" doesn't interact well with cross-compilation:
<https://mail.gnome.org/archives/vala-list/2012-September/msg00094.html>

That is causing annoying failures in our testsuite when it's run in
cross-compilation mode.  It's not worth trying too be overly smart and
work around these problems; just skip the affected tests instead.

* t/ax/am-test-lib.sh (require_tool): A new requirement 'valac', telling
that the test needs to compile Vala-generated C files.  In particular,
this causes the test to be skipped when using a cross-compiler.

Signed-off-by: Stefano Lattarini <address@hidden>
---
 t/ax/am-test-lib.sh | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/t/ax/am-test-lib.sh b/t/ax/am-test-lib.sh
index 8508197..e14f96f 100644
--- a/t/ax/am-test-lib.sh
+++ b/t/ax/am-test-lib.sh
@@ -765,6 +765,19 @@ require_tool ()
       echo "$me: running bison --version"
       bison --version || skip_all_ "required program 'bison' not available"
       ;;
+    valac)
+      echo "$me: running valac --version"
+      if ! valac --version; then
+        skip_all_ "required program 'valac' not available"
+      elif cross_compiling; then
+        skip_all_ "cross-compiling valac-generated C files is brittle"
+      fi
+      # TODO: We also know we need GNU make, the C compiler, and pkg-config
+      # here, but there is no easy way to express this with the current
+      # code organization.  We should improve the situation, sooner or
+      # later.  At which point the tests requiring 'valac' can drop the
+      # explicit requirements for those tools.
+      ;;
     *)
       # Generic case: the tool must support --version.
       echo "$me: running $1 --version"
-- 
1.8.3.rc2