Pipeclean byo_llvm, add docs and support requested features. (#14164)
* Reworks LLVM/LLD/Clang/MLIR to use CMake initial-cache files to
configure distribution support
(https://llvm.org/docs/BuildingADistribution.html) for a more precise
build that better matches how the regular distributions are done. This
was suggested by a downstream user who helped work out the incantation.
* Implements libLLVM.so shared library redirection for LLVM
dependencies, when the backing LLVM is configured in such a way.
* Changes byo_llvm.sh to a shared-library based LLVM build.
* Fixes so that IREE can build against the installed MLIR, not just the
MLIR build tree.
* Fixes the iree-tblgen target to be correct in shared-library and
installed builds.
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index e37e639..8d440fd 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -229,20 +229,21 @@
)
endif()
+ # Tablegen binaries are special snowflakes among special snowflakes.
+ # They must be statically linked against internal LLVM libraries, and they
+ # therefore must not depend on anything outside of the upstream tablegen
+ # libraries. These targets are specially set up to link in the correct
+ # way. This is a necessary diversion from how Bazel deals with it (which
+ # must deep-link to everything to satisfy its checks).
iree_cc_binary(
NAME
iree-tblgen
SRCS
- "${IREE_ROOT_DIR}/third_party/llvm-project/mlir/tools/mlir-tblgen/mlir-tblgen.cpp"
+ "iree-tblgen.cpp"
"${IREE_SOURCE_DIR}/compiler/src/iree/compiler/Dialect/VM/Tools/VMOpEncoderGen.cpp"
"${IREE_SOURCE_DIR}/compiler/src/iree/compiler/Dialect/VM/Tools/VMOpTableGen.cpp"
DEPS
- LLVMSupport
- LLVMTableGen
- MLIRSupport
- MLIRTableGen
MLIRTblgenLib
- iree::compiler::Utils
HOSTONLY
)
