Build functioning dev packages for IREECompiler and IREERuntime. (iree-org#16008)

With this patch, external projects can do:

```
find_package(IREECompiler)
find_package(IREERuntime)
```

and access our targets by adding either the build or install tree
`lib/cmake/IREE` to the CMake package search path.

There are still some ergonomic issues that need to be addressed going
forward:

* cpuinfo breaks the one downstream I am testing this against. We really
should just finish killing that, so I am setting
-DIREE_ENABLE_CPUINFO=OFF in the dist package.
* We are not yet re-establishing the pretty `iree::runtime:...` aliases.
The underscore versions are available (`iree_runtime_...`).
* I want to further isolate the remaining bundled deps (yaml and
flatcc).
* New convenience install targets do not have full dependency
information. Need to do an `all` build first.

As part of this, I did some longstanding cleanups:

* Normalized the install component namespace. Defined
`IREECMakeExports`, `IREEDevLibraries-Compiler`,
`IREEDevLibraries-Runtime`, `IREERuntimeLibraries-Compiler`,
`IREEBundledLibraries`, `IREETools-Runtime`.
* Added convenience `iree-install-*` targets. Each includes a
`-stripped` variant as well.
* Moved MLIRInterop.h to the bindings/c directory where it should have
been all along and straightened the deps.
* Install the mlir-c headers to support libIREECompiler.so dev.
* Added the "busybox" tool binaries to the install distribution
(iree-lld, etc).
* Stopped bundling upstream `lld` and `clang` by default because they
bloat the size. `lld` is now bundled as `iree-lld` just like in the
Python packages. Clang and llvm-link can be gotten by installing the new
`IREETools-CompilerExtra` component if folks need those.

Note that this only installs public headers and libraries needed to
build against the compiler and runtime. Installing private things needed
to develop parts of the system are out of scope.

Author: stellaraccident

CMakeLists.txt

@@ -544,6 +544,7 @@ include(iree_cc_binary)
 include(iree_cc_library)
 include(iree_cc_test)
 include(iree_import_binary)
+include(iree_install_support)
 include(iree_external_cmake_options)
 include(iree_tablegen_library)
 include(iree_tablegen_doc)
@@ -854,10 +855,16 @@ else()
   # Also add a library that can be depended on to get LLVM includes setup
   # properly. bazel_to_cmake targets this for some header only pseudo deps.
   add_library(IREELLVMIncludeSetup INTERFACE)
-  target_include_directories(IREELLVMIncludeSetup INTERFACE
-    ${LLVM_INCLUDE_DIRS}
-    ${MLIR_INCLUDE_DIRS}
-    ${LLD_INCLUDE_DIRS}
+  foreach(_d ${LLVM_INCLUDE_DIRS} ${MLIR_INCLUDE_DIRS} ${LLD_INCLUDE_DIRS})
+    # BUILD_INTERFACE only works one at a time.
+    target_include_directories(IREELLVMIncludeSetup INTERFACE
+      $<BUILD_INTERFACE:${_d}>
+    )
+  endforeach()
+  iree_install_targets(
+    TARGETS IREELLVMIncludeSetup
+    COMPONENT IREEPublicLibraries-Compiler
+    EXPORT_SET Compiler
   )
 
   # Splice the includes setup into base LLVM libraries so that using them
@@ -895,24 +902,49 @@ endif()
 
 #-------------------------------------------------------------------------------
 # Other dependencies
+# By default we bundle a number of dependencies needed to build the project.
+# When bundled like this, they are installed into the IREEBundledLibraries
+# component and exported to their subsystem which requires them (if a static
+# dep from the public API): "Runtime" or "Compiler".
+#
+# Some deps have a usable CMake build, and we add_subdirectory these, manually
+# using iree_install_targets to include them in our installation. Others require
+# custom CMake and these are in the build_tools/third_party directory.
+#
+# TODO: We should have a mode that purely uses find_package for OS friendly
+# packaging/externalizing deps.
 #-------------------------------------------------------------------------------
 
 include(external_cc_library)
 include(flatbuffer_c_library)
 
+# libyaml
 add_subdirectory(build_tools/third_party/libyaml EXCLUDE_FROM_ALL)
+
 add_subdirectory(build_tools/third_party/llvm-project EXCLUDE_FROM_ALL)
 add_subdirectory(build_tools/third_party/tracy_client EXCLUDE_FROM_ALL)
 
 iree_set_googletest_cmake_options()
 add_subdirectory(third_party/googletest EXCLUDE_FROM_ALL)
 
 if(IREE_ENABLE_THREADING)
+  # Benchmark.
   iree_set_benchmark_cmake_options()
   add_subdirectory(third_party/benchmark EXCLUDE_FROM_ALL)
+  iree_install_targets(
+    TARGETS benchmark
+    COMPONENT IREEBundledLibraries
+    EXPORT_SET Runtime
+  )
+
   if(IREE_ENABLE_CPUINFO)
     iree_set_cpuinfo_cmake_options()
     add_subdirectory(third_party/cpuinfo EXCLUDE_FROM_ALL)
+    iree_install_targets(
+      TARGETS cpuinfo
+      COMPONENT IREEBundledLibraries
+      EXPORT_SET Runtime
+    )
   endif()
 endif()
 
@@ -925,6 +957,11 @@ endif()
 
 if(IREE_HAL_DRIVER_VULKAN)
   add_subdirectory(third_party/vulkan_headers EXCLUDE_FROM_ALL)
+  iree_install_targets(
+    TARGETS Vulkan-Headers
+    COMPONENT IREEBundledLibraries
+    EXPORT_SET Runtime
+  )
 endif()
 
 if(IREE_BUILD_COMPILER)
@@ -1056,3 +1093,71 @@ endif()
 if(IREE_BUILD_TESTS)
   iree_create_ctest_customization()
 endif()
+
+#-------------------------------------------------------------------------------
+# Install/exports
+#-------------------------------------------------------------------------------
+
+add_subdirectory(build_tools/cmake ${IREE_BINARY_DIR}/lib/cmake/IREE)
+
+# See runtime/src/CMakeLists.txt
+iree_generate_export_targets(
+  EXPORT_SET Runtime
+)
+
+# See compiler/bindings/c/CMakeLists.txt
+iree_generate_export_targets(
+  EXPORT_SET Compiler
+)
+
+# Convenience installation targets.
+iree_add_install_target(NAME iree-install-dev-libraries)
+iree_add_install_target(NAME iree-install-runtime-libraries)
+iree_add_install_target(NAME iree-install-tools)
+
+iree_add_install_target(
+  NAME iree-install-cmake-exports
+  COMPONENT IREECMakeExports
+  ADD_TO iree-install-dev-libraries
+)
+
+iree_add_install_target(
+  NAME iree-install-dev-libraries-runtime
+  COMPONENT IREEDevLibraries-Runtime
+  ADD_TO iree-install-dev-libraries
+)
+
+iree_add_install_target(
+  NAME iree-install-bundled-libraries
+  COMPONENT IREEBundledLibraries
+  ADD_TO iree-install-dev-libraries-runtime
+)
+
+if(IREE_BUILD_COMPILER)
+  iree_add_install_target(
+    NAME iree-install-dev-libraries-compiler
+    COMPONENT IREEDevLibraries-Compiler
+    ADD_TO iree-install-dev-libraries
+  )
+
+  iree_add_install_target(
+    NAME iree-install-tools-compiler
+    COMPONENT IREETools-Compiler
+    ADD_TO iree-install-tools
+  )
+
+  iree_add_install_target(
+    NAME iree-install-runtime-libraries-compiler
+    COMPONENT IREERuntimeLibraries-Compiler
+    ADD_TO 
+      iree-install-runtime-libraries
+      iree-install-tools-compiler
+      iree-install-dev-libraries-compiler
+  )
+endif()
+
+iree_add_install_target(
+  NAME iree-install-tools-runtime
+  COMPONENT IREETools-Runtime
+  ADD_TO iree-install-tools
+)

build_tools/cmake/CMakeLists.txt

@@ -0,0 +1,31 @@
+# Copyright 2023 The IREE Authors
+#
+# Licensed under the Apache License v2.0 with LLVM Exceptions.
+# See https://llvm.org/LICENSE.txt for license information.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+set(_cmake_installdir "${CMAKE_INSTALL_LIBDIR}/cmake/IREE")
+
+if(IREE_BUILD_COMPILER)
+  configure_file(
+    ${CMAKE_CURRENT_SOURCE_DIR}/IREECompilerConfig.cmake.in
+    ${CMAKE_CURRENT_BINARY_DIR}/IREECompilerConfig.cmake
+    @ONLY
+  )
+  install(FILES
+    ${CMAKE_CURRENT_BINARY_DIR}/IREECompilerConfig.cmake
+    DESTINATION ${_cmake_installdir}
+    COMPONENT IREECMakeExports
+  )  
+endif()
+
+configure_file(
+  ${CMAKE_CURRENT_SOURCE_DIR}/IREERuntimeConfig.cmake.in
+  ${CMAKE_CURRENT_BINARY_DIR}/IREERuntimeConfig.cmake
+  @ONLY
+)
+install(FILES
+  ${CMAKE_CURRENT_BINARY_DIR}/IREERuntimeConfig.cmake
+  DESTINATION ${_cmake_installdir}
+  COMPONENT IREECMakeExports
+)

build_tools/cmake/IREECompilerConfig.cmake.in

@@ -0,0 +1,6 @@
+# This allows users to call find_package(IREECompiler) and access our targets.
+
+include("${CMAKE_CURRENT_LIST_DIR}/IREETargets-Compiler.cmake")
+
+# TODO: Define some properties to reference all libraries and config options.
+# TODO: Iterate over all exported libraries and re-alias them.

build_tools/cmake/IREERuntimeConfig.cmake.in

@@ -0,0 +1,6 @@
+# This allows users to call find_package(IREERuntime) and access our targets.
+
+include("${CMAKE_CURRENT_LIST_DIR}/IREETargets-Runtime.cmake")
+
+# TODO: Define some properties to reference all libraries and config options.
+# TODO: Iterate over all exported libraries and re-alias them.

build_tools/cmake/external_cc_library.cmake

@@ -169,13 +169,17 @@ function(external_cc_library)
     )
   endif()
 
-  add_library(${_RULE_PACKAGE}::${_RULE_NAME} ALIAS ${_NAME})
+  iree_install_targets(
+    TARGETS ${_NAME}
+    HDRS ${_RULE_HDRS}
+  )    
+
+  iree_add_alias_library(${_RULE_PACKAGE}::${_RULE_NAME} ${_NAME})
   # If the library name matches the final component of the package then treat it
   # as a default. For example, 'foo::bar' library 'bar' would end up as
   # 'foo::bar'.
   string(REGEX REPLACE "^.*::" "" _PACKAGE_DIR ${_RULE_PACKAGE})
   if(${_PACKAGE_DIR} STREQUAL ${_RULE_NAME})
-
-    add_library(${_RULE_PACKAGE} ALIAS ${_NAME})
+    iree_add_alias_library(${_RULE_PACKAGE} ${_NAME})
   endif()
 endfunction()

build_tools/cmake/flatbuffer_c_library.cmake

@@ -116,7 +116,7 @@ function(flatbuffer_c_library)
   add_dependencies(${_NAME} ${_GEN_TARGET})
   target_include_directories(${_NAME} SYSTEM
     INTERFACE
-      ${CMAKE_CURRENT_BINARY_DIR}
+      $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>
     )
   target_link_libraries(${_NAME}
     INTERFACE
@@ -127,10 +127,13 @@ function(flatbuffer_c_library)
       "-I${IREE_ROOT_DIR}/third_party/flatcc/include/"
       "-I${IREE_ROOT_DIR}/third_party/flatcc/include/flatcc/reflection/"
   )
-
+  iree_install_targets(
+    TARGETS ${_NAME}
+  )
+  
   # Alias the iree_package_name library to iree::package::name.
   # This lets us more clearly map to Bazel and makes it possible to
   # disambiguate the underscores in paths vs. the separators.
   iree_package_ns(_PACKAGE_NS)
-  add_library(${_PACKAGE_NS}::${_RULE_NAME} ALIAS ${_NAME})
+  iree_add_alias_library(${_PACKAGE_NS}::${_RULE_NAME} ${_NAME})
 endfunction()

build_tools/cmake/iree_cc_binary.cmake

@@ -27,7 +27,7 @@ include(CMakeParseArguments)
 # HOSTONLY: host only; compile using host toolchain when cross-compiling
 # SETUP_INSTALL_RPATH: Sets an install RPATH which assumes the standard
 #   directory layout (to be used if linking against installed shared libs).
-#
+# INSTALL_COMPONENT: CMake install component (Defaults to "IREETool-${_RULE_NAME}").
 # Note:
 # iree_cc_binary will create a binary called ${PACKAGE_NAME}_${NAME}, e.g.
 # iree_base_foo with an alias to ${PACKAGE_NS}::${NAME}.
@@ -55,7 +55,7 @@ function(iree_cc_binary)
   cmake_parse_arguments(
     _RULE
     "EXCLUDE_FROM_ALL;HOSTONLY;TESTONLY;SETUP_INSTALL_RPATH;DISABLE_LLVM_LINK_LLVM_DYLIB"
-    "NAME"
+    "NAME;INSTALL_COMPONENT"
     "SRCS;COPTS;DEFINES;LINKOPTS;DATA;DEPS"
     ${ARGN}
   )
@@ -155,18 +155,23 @@ function(iree_cc_binary)
   set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD ${IREE_CXX_STANDARD})
   set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
 
+  set(_INSTALL_COMPONENT "${_RULE_INSTALL_COMPONENT}")
+  if(NOT _INSTALL_COMPONENT)
+    set(_INSTALL_COMPONENT "IREETool-${_RULE_NAME}")
+  endif()
+
   if(_RULE_EXCLUDE_FROM_ALL)
     set_property(TARGET ${_NAME} PROPERTY EXCLUDE_FROM_ALL ON)
     install(TARGETS ${_NAME}
             RENAME ${_RULE_NAME}
-            COMPONENT ${_RULE_NAME}
+            COMPONENT ${_INSTALL_COMPONENT}
             RUNTIME DESTINATION bin
             BUNDLE DESTINATION bin
             EXCLUDE_FROM_ALL)
   else()
     install(TARGETS ${_NAME}
       RENAME ${_RULE_NAME}
-      COMPONENT ${_RULE_NAME}
+      COMPONENT ${_INSTALL_COMPONENT}
       RUNTIME DESTINATION bin
       BUNDLE DESTINATION bin)
   endif()

build_tools/cmake/iree_cc_library.cmake

@@ -292,21 +292,28 @@ function(iree_cc_library)
     )
   endif()
 
+  if(NOT _RULE_TESTONLY)
+    iree_install_targets(
+      TARGETS ${_NAME}
+      HDRS ${_RULE_HDRS} ${_RULE_TEXTUAL_HDRS}
+    )
+  endif()
+
   # Alias the iree_package_name library to iree::package::name.
   # This lets us more clearly map to Bazel and makes it possible to
   # disambiguate the underscores in paths vs. the separators.
   if(_DEBUG_IREE_PACKAGE_NAME)
     message(STATUS "  + alias ${_PACKAGE_NS}::${_RULE_NAME}")
   endif()
-  add_library(${_PACKAGE_NS}::${_RULE_NAME} ALIAS ${_NAME})
+  iree_add_alias_library(${_PACKAGE_NS}::${_RULE_NAME} ${_NAME})
 
   if(NOT "${_PACKAGE_NS}" STREQUAL "")
     # If the library name matches the final component of the package then treat
     # it as a default. For example, foo/bar/ library 'bar' would end up as
     # 'foo::bar'.
     iree_package_dir(_PACKAGE_DIR)
     if("${_RULE_NAME}" STREQUAL "${_PACKAGE_DIR}")
-      add_library(${_PACKAGE_NS} ALIAS ${_NAME})
+      iree_add_alias_library(${_PACKAGE_NS} ${_NAME})
     endif()
   endif()
 endfunction()
@@ -428,17 +435,21 @@ function(iree_cc_unified_library)
       $<TARGET_PROPERTY:${_RULE_ROOT},INTERFACE_LINK_LIBRARIES>
   )
 
+  iree_install_targets(
+    TARGETS ${_NAME}
+  )
+
   # Alias the iree_package_name library to iree::package::name.
   # This lets us more clearly map to Bazel and makes it possible to
   # disambiguate the underscores in paths vs. the separators.
-  add_library(${_PACKAGE_NS}::${_RULE_NAME} ALIAS ${_NAME})
+  iree_add_alias_library(${_PACKAGE_NS}::${_RULE_NAME} ${_NAME})
 
   # If the library name matches the final component of the package then treat
   # it as a default. For example, foo/bar/ library 'bar' would end up as
   # 'foo::bar'.
   iree_package_dir(_PACKAGE_DIR)
   if(${_RULE_NAME} STREQUAL ${_PACKAGE_DIR})
-    add_library(${_PACKAGE_NS} ALIAS ${_NAME})
+    iree_add_alias_library(${_PACKAGE_NS} ${_NAME})
   endif()
 endfunction()