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Update cmake integration #4

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16 changes: 10 additions & 6 deletions README.md
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Expand Up @@ -22,14 +22,18 @@ IDL is used for creating COM servers. Unfortunately CMake has a limited support
- Tlbimp.exe (optional)

# Usage
## find_package()
Add [FindIDL](https://github.com/apriorit/FindIDL) to the module search path and call `find_package`:
## Simplest integration
```cmake
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/../cmake")
find_package(IDL REQUIRED)
if(NOT EXISTS "${CMAKE_CURRENT_BINARY_DIR}/FindIDL.cmake")
message(STATUS "Downloading FindIDL.cmake from https://github.com/apriorit/FindIDL")
file(DOWNLOAD "https://raw.githubusercontent.com/apriorit/FindIDL/1.0.2/cmake/FindIDL.cmake"
"${CMAKE_CURRENT_BINARY_DIR}/FindIDL.cmake"
EXPECTED_HASH SHA256=d88db93c485227b287371bd1848d82110fa5ef32e5febe6865aa3ec27c7558b3
TLS_VERIFY ON)
endif()

include(${CMAKE_CURRENT_BINARY_DIR}/FindIDL.cmake)
```
[FindIDL](https://github.com/apriorit/FindIDL) will search for midl.exe and tlbimp.exe

## add_idl()
Takes two arguments: the name of the target project and idl file.
```cmake
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