CMake remake

[gaurapanasenko]

Now it is easy to pack library with cpack and use library with:

find_package(cimgui REQUIRED)
target_link_libraries(${PROJECT_NAME} PRIVATE ${CIMGUI_LIBRARIES})

[sonoro1234]

compilation with Freetype gets broken for me, not only for missing PATHS ${FREETYPE_PATH} (I installed freetype to standard path but freetype is not found unless I use find_package(freetype REQUIRED PATHS ${CMAKE_PREFIX_PATH}))

If I add PATHS ${FREETYPE_PATH} the error is

C:\LuaGL\gitsources\anima\LuaJIT-ImGui\cimgui\imgui\misc\freetype\imgui_freetype.cpp:35:10: fatal error: ft2build.h: No such file or directory
 #include <ft2build.h>
          ^~~~~~~~~~~~

It is only solved by list(APPEND IMGUI_LIBRARIES freetype)

[sonoro1234]

For being backward compatible this should be used

if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/../imgui/backends)
	set(BAKENDS_FOLDER "../imgui/backends/")
else()
	set(BAKENDS_FOLDER "../imgui/examples/")
endif()

As found in https://github.com/cimgui/cimgui/blob/master/backend_test/CMakeLists.txt

[gaurapanasenko]

If I add PATHS ${FREETYPE_PATH} the error is

C:\LuaGL\gitsources\anima\LuaJIT-ImGui\cimgui\imgui\misc\freetype\imgui_freetype.cpp:35:10: fatal error: ft2build.h: No such file or directory
 #include <ft2build.h>
          ^~~~~~~~~~~~

You got compile error when including header file. This is why I added:

list(APPEND IMGUI_INCLUDE_DIRS ${FREETYPE_INCLUDE_DIRS})

Did you copied header files to ${CMAKE_PREFIX_PATH} when you was installing Freetype?

[sonoro1234]

You got compile error when including header file. This is why I added:

list(APPEND IMGUI_INCLUDE_DIRS ${FREETYPE_INCLUDE_DIRS})

Not working for me

Did you copied header files to ${CMAKE_PREFIX_PATH} when you was installing Freetype?

Yes. I did the cmake installation as explained in CMakeLists.txt from freetype: https://github.com/freetype/freetype2.git

first: cmake -G"MinGW Makefiles" -B build -D BUILD_SHARED_LIBS=true -D CMAKE_BUILD_TYPE=Release ../../freetype2
second:cmake --build build --target install

[gaurapanasenko]

@sonoro1234 I got exactly same compile error when tried to add PATHS in find_package. I tried also ${CMAKE_SYSTEM_PREFIX_PATH}. So for now I appended FREETYPE_PATH to CMAKE_SYSTEM_PREFIX_PATH because cmake documentation says that this variable is used by find_package but not sure that it will work for you.
What environment you use for compilation? I use OpenSUSE Tumbleweed and tried prebuild freetype package and custom build freetype package with cpack and all works good. Later I can try to compile and pack it on Windows with MSYS2.

[sonoro1234]

I have been using https://github.com/freetype/freetype2.git with mingw-w64 without MSYS.
I seems outdated so I used https://gitlab.freedesktop.org/freetype/freetype but it fails to run cmake (posted an issue there and is already solved)

I used FREETYPE_PATH to point to a non standard installation directory, so it should not be necessary with a standard installation but in both cases find_package is failing unless I add PATHS.

For solving the two issues (find freetype and avoid compile errors) only this is working for me

	find_package(freetype REQUIRED PATHS ${CMAKE_SYSTEM_PREFIX_PATH})
	#list(APPEND IMGUI_INCLUDE_DIRS ${FREETYPE_INCLUDE_DIRS})
	list(APPEND IMGUI_LIBRARIES freetype)
	list(APPEND IMGUI_SOURCES imgui/misc/freetype/imgui_freetype.cpp)
	add_definitions("-DCIMGUI_FREETYPE=1")

second line (commented as does not help), freetype succeds but Freetype not.
list(APPEND IMGUI_LIBRARIES freetype) solves the include issue.