tree 4d29c0564af2489334acabfc5f98d84e7bce98f8
parent 0462795095e57d9cac3c68ff1f28bc4bef8c4865
author Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> 1585680359 -0700
committer Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> 1585938218 -0700

[CMAKE] Plumb include_directories() into tablegen()

Previously, the tablegen() cmake command, which defines custom
commands for running tablegen, included several hardcoded paths.  This
becomes unwieldy as there are more users for which these paths are
insufficient.  For most targets, cmake uses include_directories() and
the INCLUDE_DIRECTORIES directory property to specify include paths.
This change picks up the INCLUDE_DIRECTORIES property and adds it
to the include path used when running tablegen.  As a side effect, this
allows us to remove several hard coded paths to tablegen that are redundant
with specified include_directories().

I haven't removed the hardcoded path to CMAKE_CURRENT_SOURCE_DIR, which
seems generically useful.  There are several users in clang which apparently
don't have the current directory as an include_directories().  This could
be considered separately.

The new version of this path uses list APPEND rather than list TRANSFORM,
in order to be compatible with cmake 3.4.3. If we update to cmake 3.12 then
we can use list TRANSFORM instead.

Differential Revision: https://reviews.llvm.org/D77156