added instructions to cross compile on linux for windows

build a statically linked executable

BUILD_SPECIAL.md

@@ -0,0 +1,23 @@
+### Build for windows on linux
+
+Assuming the host platform is "arch linux".
+
+install from [AUR](https://aur.archlinux.org/):
+1. mingw-w64-gcc-base
+2. mingw-w64-gcc
+3. mingw-w64-libiconv
+
+After that you will have following tool chains available:
+
+- /usr/i686-w64-mingw32
+- /usr/x86_64-w64-mingw32
+
+
+    git checkout https://github.com/ferkulat/csv2xls.git
+    cd csv2xls
+    mkdir build
+    cd build
+    cmake -DCMAKE_TOOLCHAIN_FILE=../cmake/modules/Toolchain-mingw.cmake ..
+    cmake --build .
+
+This builds with tool chain 'i686-w64-mingw32'. If you want to build with another tool chain, you need to change it in file 'Toolchain-mingw.cmake'

CMakeLists.txt

@@ -28,6 +28,6 @@ add_subdirectory(csv2xlslib)
 add_subdirectory(csv2xlslib.Test )
 add_executable(csv2xls csv2xls.cpp ${version_file})
 target_compile_options( csv2xls PUBLIC ${WARNINGOPTS} )
-target_link_libraries(csv2xls csv2xlslib )
+target_link_libraries(csv2xls csv2xlslib -static)
 
 install(TARGETS csv2xls DESTINATION bin)

README.md

@@ -31,12 +31,10 @@ csv2xls (csv to xls) is a command line utility which converts csv files into one
     cd build
     cmake ..
     cmake --build .
-
+For other build targets, please have a look at [BUILD_SPECIAL.md](BUILD_SPECIAL.md)
 ### Documentaion
 
 - Print help:  csv2xls -h
-- manual page: man csv2xls
-- https://github.com/ferkulat/csv2xls/wiki
 
 ### How to contribute
 

cmake/modules/Toolchain-mingw.cmake

@@ -0,0 +1,19 @@
+# the name of the target operating system
+SET(CMAKE_SYSTEM_NAME Windows)
+
+SET(MINGW_CHAIN i686-w64-mingw32)
+SET(I_USE_MINGW true)
+# which compilers to use for C and C++
+SET(CMAKE_C_COMPILER ${MINGW_CHAIN}-gcc)
+SET(CMAKE_CXX_COMPILER ${MINGW_CHAIN}-g++)
+SET(CMAKE_RC_COMPILER ${MINGW_CHAIN}-windres)
+
+# here is the target environment located
+SET(CMAKE_FIND_ROOT_PATH  /usr/${MINGW_CHAIN} )
+
+# adjust the default behaviour of the FIND_XXX() commands:
+# search headers and libraries in the target environment, search
+# programs in the host environment
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

cmake/modules/xlslib.cmake

@@ -5,7 +5,7 @@ set(EXTERN_XLSLIB_DIR ${EXTERN_DEPENDENCIES_DIR}/xlslib)
 FetchContent_Declare(
   xlslib
   GIT_REPOSITORY https://github.com/ferkulat/xlslib.git
-  GIT_TAG        227776845cca16a50213359c58c7b9e8264520d9
+  GIT_TAG        28fb458bc5ba2da614f4738d9560a6fb917d49a9
   SOURCE_DIR     ${EXTERN_XLSLIB_DIR}
 )
 FetchContent_MakeAvailable(xlslib)

csv2xlslib/CMakeLists.txt

@@ -24,9 +24,11 @@ add_library(csv2xlslib
         csv2xls_types.cpp)
 target_compile_options( csv2xlslib PUBLIC ${WARNINGOPTS} )
 target_include_directories(csv2xlslib SYSTEM PRIVATE ${CMAKE_PREFIX_PATH}/include/xlslib)
+message("CMAKE_CXX_COMPILER_ID ${CMAKE_CXX_COMPILER_ID}" )
 if( CMAKE_CXX_COMPILER_ID MATCHES "MSVC" )
-	target_link_libraries(csv2xlslib xlslib csv )
-endif()
-if( CMAKE_CXX_COMPILER_ID MATCHES "Clang|AppleClang|GNU" )
-    target_link_libraries(csv2xlslib xlslib csv stdc++fs)
+	target_link_libraries(csv2xlslib xlslib csv -static)
+elseif(I_USE_MINGW)
+    target_link_libraries(csv2xlslib xlslib csv iconv -static)
+elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang|AppleClang|GNU")
+    target_link_libraries(csv2xlslib xlslib csv stdc++fs -static)
 endif()