C++ cross compile WxWidgets with MXE using CMAKE

Question

I am trying to make a CMAKE file that allows me to cross compile a WxWidgets application From Ubuntu For Windows. My tools are all installed correctly, and I am able to run:

i686-w64-mingw32.static-gcc main.cpp $(i686-w64-mingw32.static-wx-config --cxxflags --libs) -o main.exe -std=c++11 -lstdc++

and produce a working output. But I have been unsuccessful in finding a way to convert this into a CMAKE file. Does anyone have any resources or even examples of a working example?

Here is an example of my non-working file:

cmake_minimum_required(VERSION 3.11)

SET (PROJECT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
SET(PROJECT_NAME "WxWidgets")
SET(CMAKE_C_COMPILER i686-w64-mingw32.static)
project(
  ${PROJECT_NAME}
  VERSION 1.0
  LANGUAGES CXX)

  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} (i686-w64-mingw32.static-wx-config --cxxflags --libs) -L /home/kevin/wxWidgets/include/ -Wall -std=gnu++2a -static -g")
  
  
  file(GLOB all_SRCS
        "${PROJECT_SOURCE_DIR}/src/*.h"
        "${PROJECT_SOURCE_DIR}/src/*.hpp"
        "${PROJECT_SOURCE_DIR}/src/*.c"
        "${PROJECT_SOURCE_DIR}/src/*.cpp"
        "${PROJECT_SOURCE_DIR}/src/**/*.c"
        "${PROJECT_SOURCE_DIR}/src/**/*.cpp"
        "${PROJECT_SOURCE_DIR}/src/**/*.hpp"
        )

  add_executable(${PROJECT_NAME} ${all_SRCS})

I am running the command: i686-w64-mingw32.static-cmake .. within my build directory.

By removing: **(i686-w64-mingw32.static-wx-config --cxxflags --libs) -L /home/kevin/wxWidgets/include/**, I am getting the error:

fatal error: wx/wxprec.h: No such file or directory
    8 | #include "wx/wxprec.h"

I have this file I checked with locate:

$ locate wx/wxprec.h
/home/kevin/mxe/usr/i686-w64-mingw32.static/include/wx-3.1/wx/wxprec.h
/home/kevin/wxWidgets/include/wx/wxprec.h
/usr/local/include/wx-3.3/wx/wxprec.h

EDIT:

Thanks to @vre's comment, I have updated my CMakeLists.txt file and have moved closer, it seems now that I just need to link correctly Here is what I have:

cmake_minimum_required(VERSION 3.11)

SET (PROJECT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
SET(PROJECT_NAME "WxWidgets")
SET(CMAKE_C_COMPILER i686-w64-mingw32.static)
project(
  ${PROJECT_NAME}
  VERSION 1.0)

  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=gnu++2a -static -g")
  
  file(GLOB all_SRCS
        "${PROJECT_SOURCE_DIR}/src/*.h"
        "${PROJECT_SOURCE_DIR}/src/*.hpp"
        "${PROJECT_SOURCE_DIR}/src/*.c"
        "${PROJECT_SOURCE_DIR}/src/*.cpp"
        "${PROJECT_SOURCE_DIR}/src/**/*.c"
        "${PROJECT_SOURCE_DIR}/src/**/*.cpp"
        "${PROJECT_SOURCE_DIR}/src/**/*.hpp"
        )

  add_executable(${PROJECT_NAME} ${all_SRCS})

  include( "${wxWidgets_USE_FILE}" )
  find_package(wxWidgets REQUIRED)
  target_include_directories(${PROJECT_NAME} PUBLIC /home/kevin/mxe/usr/i686-w64-mingw32.static/include/wx-3.1/ /home/kevin/mxe/usr/i686-w64-mingw32.static/lib/wx/include/i686-w64-mingw32.static-msw-unicode-static-3.1/)
  target_link_directories(${PROJECT_NAME} PRIVATE /home/kevin/mxe/usr/i686-w64-mingw32.static/lib/)

But sadly, I have many linker errors such as:

undefined reference to `wxFrame::GetDefaultIcon() const'

C++ cross compile WxWidgets with MXE using CMAKE

0 Answers