Potential tablegen dependency fix (#139)

This PR attempts to fix a missing dependency issue in the cmake system. 

Occasionally we will run into build errors of the form:
```
No such file or directory
   28 | #include "Dialect/QUIR/IR/QUIRTypes.h.inc"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```

This is caused by a missing dependency between the files created by
tablegen and any source file that attempts to include something that
includes them (such as the dialect headers).

I have added explicit dependencies to the `mlir-headers` cmake target
that is defined by `add_mlir_dialect` to hopefully resolve this problem.
Unfortunately source file creation is not a typical part of the build
process outside of LLVM, so it's hard to be sure that cmake will still
respect this dependency the way we want.

Author: mbhealy

CMakeLists.txt

@@ -382,6 +382,7 @@ endforeach()
 source_group(TREE ${CMAKE_CURRENT_SOURCE_DIR} FILES ${SOURCE_FILES})
 
 add_library(qss-compiler-opt ${SOURCE_FILES})
+add_dependencies(qss-compiler-opt mlir-headers)
 
 set(CPACK_PROJECT_NAME ${PROJECT_NAME})
 set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})

lib/API/CMakeLists.txt

@@ -26,4 +26,4 @@ target_sources(QSSCAPI
     FILES ${QSSC_INCLUDE_DIR}/API/api.h ${QSSC_INCLUDE_DIR}/API/error.h
     )
 
-add_dependencies(QSSCAPI QSSCError MLIROQ3Dialect MLIRQCSDialect MLIRQUIRDialect)
+add_dependencies(QSSCAPI QSSCError MLIROQ3Dialect MLIRQCSDialect MLIRQUIRDialect mlir-headers)

lib/Arguments/CMakeLists.txt

@@ -11,5 +11,6 @@
 # that they have been altered from the originals.
 
 add_library(QSSCArguments Signature.cpp Arguments.cpp)
+add_dependencies(QSSCArguments mlir-headers)
 
 target_link_libraries(QSSCArguments QSSCPayloadZip libzip::zip)

lib/CMakeLists.txt

@@ -24,6 +24,7 @@ set(SOURCES
         QSSC.cpp
 )
 add_library(QSSCCore ${SOURCES})
+add_dependencies(QSSCCore mlir-headers)
 
 get_property(qssc_targets GLOBAL PROPERTY QSSC_TARGETS)
 get_property(mlir_dialect_libs GLOBAL PROPERTY MLIR_DIALECT_LIBS)
@@ -59,6 +60,7 @@ set_property(GLOBAL PROPERTY QSSC_API_LIBS ${qssc_api_libs})
 # INTERFACE and dependencies to all targets that refer to the library yet does
 # not materialize as an artifact by itself
 add_library(QSSCLib INTERFACE)
+add_dependencies(QSSCLib mlir-headers)
 target_link_libraries(QSSCLib INTERFACE ${qssc_api_libs})
 
 if(INSTALL_BUNDLED_STATIC_LIB)
@@ -67,6 +69,7 @@ if(INSTALL_BUNDLED_STATIC_LIB)
         # If you consider adding that support, MacOS's libtool could be an option since it appears capable of bundling static libraries.
     endif()
     add_library(QSSCompiler STATIC API/api.cpp)
+    add_dependencies(QSSCompiler mlir-headers)
     target_link_libraries(QSSCompiler PUBLIC
            ${qssc_targets}
             QSSCAPI

lib/Payload/ZipPayload/CMakeLists.txt

@@ -30,3 +30,5 @@ qssc_add_plugin(QSSCPayloadZip QSSC_PAYLOAD_PLUGIN
         PLUGIN_REGISTRATION_HEADERS
         ${CMAKE_CURRENT_SOURCE_DIR}/Payload.inc
         )
+
+add_dependencies(QSSCPayloadZip mlir-headers)