VS: Fix subproject .sln dependencies on custom targets

Each project listed in a .sln must be marked (or not) as part of the
"default build" for each configuration.  For targets created by the
add_custom_target() command we add them to the default build if they
are not excluded in some way or if another target depends on them.
In the top-level .sln, a custom target is excluded if it is not
created with the ALL option to add_custom_target.  In subdirectory
.sln files, a target may also be excluded if it is not within the
directory and is brought into the solution only due to a dependency
from another target in the solution.

Fix the "IsPartOfDefaultBuild" and "IsDependedOn" methods to check
every target to be included in the .sln for a dependency on the
custom target.  Otherwise transitive dependencies through targets
not in the current subdirectory will not be considered.

Extend the SubProject test with a custom target to cover this case.

Reported-by: William Deurwaarder <William.Deurwaarder@tomtom.com>
Reported-by: Dirk Steenpass <dirk.steenpass@gmail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/Tests/SubProject/gen.cxx.in b/Tests/SubProject/gen.cxx.in
new file mode 100644
index 0000000..c3f6a18
--- /dev/null
+++ b/Tests/SubProject/gen.cxx.in
@@ -0,0 +1,4 @@
+int bar()
+{
+  return 10;
+}