LO Windows SDK - Compiler error: Unkown Platform

[Fatih Yegin]

Hello,

I am experimenting with LO SDK and using cmake to compile according to
this page:
https://dev.blog.documentfoundation.org/2022/04/19/using-cmake-to-build-libreoffice-cpp-sdk-examples/

This works great on Linux.

However, I am having build errors on Windows.

I believe, root cause of this problem is unkown platform error from sal
library. Yet, I can't solve this even though I explicitly specify the
OS within compile commands.

I have added these errors briefly on the attachements in
Build_errors.txt with the addition of CMakeLists.txt file and
compile_commands.json file.

For the build environment, I use MSYS's MINGW64 environment (additional
info can be found at: https://www.msys2.org/docs/environments/).

I can share my configuration steps with a secondary e-mail if needed.

Thank you.

Best Regards,
Fatih Yeğin

compile_commands.json
Description: application/json

#Cmake minimum
cmake_minimum_required(VERSION 3.15)

#C++ standard
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED True)

#Set project properties
project(
	Experiments
	DESCRIPTION "My custom experiments."
	LANGUAGES CXX
)

#Set OS specific variables
if(UNIX AND NOT APPLE)
	add_compile_definitions("LINUX")
	set(LIBRE_ROOT "/usr/lib/libreoffice")
	set(LIBRE_SDK "${LIBRE_ROOT}/sdk")
	set(CPPUMAKER "${LIBRE_SDK}/bin/cppumaker")
elseif(WIN32)
	add_compile_definitions(
		WIN32
		WNT
		_DLL
		CPPU_ENV=gcc3
	)
	set(LIBRE_ROOT "C:/LibreOffice")
	set(LIBRE_SDK "C:/LibreOffice/sdk")
	set(CPPUMAKER "${LIBRE_SDK}/bin/cppumaker.exe")
elseif(APPLE)
	add_compile_definitions("MACOSX")
	#TODO: Apple will be defined later
	#set(LIBRE_ROOT /usr/lib/libreoffice)
	#set(LIBRE_SDK ${LIBRE_ROOT}/sdk)
	#set(CPPUMAKER ${LIBRE_SDK}/bin/cppumaker)
endif()

if(NOT DEFINED LIBRE_ROOT AND NOT DEFINED LIBRE_SDK)
	if(APPLE)
		message(FATAL_ERROR "Cannot build for Apple, sorry!")
	else()
		message(FATAL_ERROR "Unknown architecture!")
	endif()
endif()

#Set necessary variables
set(EXE_NAME experiments)
set(BIN_DIR "${CMAKE_SOURCE_DIR}/bin")
set(LIB_DIR "${CMAKE_SOURCE_DIR}/lib")
set(PROJ_HEADERS_DIR "${CMAKE_SOURCE_DIR}")
set(PROJ_SOURCES_DIR "${CMAKE_SOURCE_DIR}")
set(LIBRE_LOCAL_HEADERS_DIR "${CMAKE_SOURCE_DIR}/../libreoffice-headers")

#Make necessary directories
file(
	MAKE_DIRECTORY
	${BIN_DIR}
	${LIB_DIR}
)

#Configure where to put libraries
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIB_DIR})
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIB_DIR})

#Configure where to put executable
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${BIN_DIR})

#Compile libre cpp headers
if(NOT EXISTS ${LIBRE_LOCAL_HEADERS_DIR})
	file(MAKE_DIRECTORY ${LIBRE_LOCAL_HEADERS_DIR})

	execute_process(
		COMMAND ${CPPUMAKER} -Gc -C "${LIBRE_ROOT}/program/types.rdb" "${LIBRE_ROOT}/program/types/offapi.rdb"
		WORKING_DIRECTORY "${LIBRE_LOCAL_HEADERS_DIR}"
	)
endif()

#Make libre_libs library target
file(GLOB_RECURSE LIBRE_HEADERS ${LIBRE_LOCAL_HEADERS_DIR}/*.hpp ${LIBRE_LOCAL_HEADERS_DIR}/*.hdl ${LIBRE_SDK}/include/*.hxx ${LIBRE_SDK}/include/*.h)
add_library(libre_libs SHARED ${LIBRE_HEADERS})
set_target_properties(libre_libs PROPERTIES LINKER_LANGUAGE CXX)

#Make proj_libs library target
#file(GLOB_RECURSE PROJ_HEADERS ${PROJ_HEADERS_DIR}/*.hpp)
#add_library(proj_libs SHARED ${PROJ_HEADERS})
#set_target_properties(proj_libs PROPERTIES LINKER_LANGUAGE CXX)

#Make executable target
add_executable(${EXE_NAME} ${PROJ_SOURCES_DIR}/experiment.cpp)

#Include directories
target_include_directories(
	${EXE_NAME}
	PUBLIC ${LIBRE_LOCAL_HEADERS_DIR}
	PUBLIC ${PROJ_HEADERS_DIR}
	PUBLIC ${PROJ_SOURCES_DIR}
	PUBLIC ${LIBRE_SDK}/include
)

#Link directories
target_link_directories(
	${EXE_NAME}
	PRIVATE ${LIBRE_SDK}/lib
	PRIVATE ${LIBRE_ROOT}/program
)

#Link libraries
target_link_libraries(
	${EXE_NAME}
	PUBLIC libre_libs
	#PUBLIC proj_libs
	-luno_sal
	-luno_cppu
	-luno_cppuhelpergcc3
	-luno_salhelpergcc3
	-lunoidllo
	-lxmlreaderlo
	-lreglo
)


In file included from C:/LibreOffice/sdk/include/rtl/textenc.h:27,
                 from C:/LibreOffice/sdk/include/rtl/string.hxx:43,
                 from C:\Users\VBox\Desktop\experiments\experiment.cpp:4:
C:/LibreOffice/sdk/include/sal/types.h:250:5: error: #error ("unknown platform")
  250 | #   error("unknown platform")
      |     ^~~~~
In file included from C:/LibreOffice/sdk/include/osl/interlck.h:29,
                 from C:/LibreOffice/sdk/include/rtl/string.h:29,
                 from C:/LibreOffice/sdk/include/rtl/string.hxx:44:
C:/LibreOffice/sdk/include/sal/saldllapi.h:34:23: error: 'SAL_DLLPUBLIC_IMPORT' 
does not name a type; did you mean 'SAL_DLLPUBLIC'?
   34 | #define SAL_DLLPUBLIC SAL_DLLPUBLIC_IMPORT
      |                       ^~~~~~~~~~~~~~~~~~~~

[And goes on...]