Buildsystem: Add the fftw lib to the repository for windows users

Author: David Graeff

cmake/fftw-3.3.5-dll32.zip

@@ -9,15 +9,20 @@ macro( CheckExitCodeAndExitIfError MSG)
   endif()
 endmacro( CheckExitCodeAndExitIfError )
 
+set(filename "${CMAKE_BINARY_DIR}/fftw.zip")
+
 if (CMAKE_SIZEOF_VOID_P EQUAL 4)
-    message("Download FFTW for mingw32")
+    message("Download/Extract FFTW for 32bit")
     if (NOT EXISTS "${CMAKE_BINARY_DIR}/fftw.zip")
-        file(DOWNLOAD "ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll32.zip" "${CMAKE_BINARY_DIR}/fftw.zip" SHOW_PROGRESS)
+        # file(DOWNLOAD "ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll32.zip" "${filename}" SHOW_PROGRESS)
+        set(filename "${CMAKE_CURRENT_LIST_DIR}/fftw-3.3.5-dll32.zip")
     endif()
 elseif(CMAKE_SIZEOF_VOID_P EQUAL 8)
-    message("Download FFTW for mingw64")
+    set(LIBEXE_64 "/machine:x64")
+    message("Download/Extract FFTW for 64bit")
     if (NOT EXISTS "${CMAKE_BINARY_DIR}/fftw.zip")
-        file(DOWNLOAD "ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll64.zip" "${CMAKE_BINARY_DIR}/fftw.zip" SHOW_PROGRESS)
+        # file(DOWNLOAD "ftp://ftp.fftw.org/pub/fftw/fftw-3.3.5-dll64.zip" "${filename}" SHOW_PROGRESS)
+        set(filename "${CMAKE_CURRENT_LIST_DIR}/fftw-3.3.5-dll64.zip")
     endif()
 else()
     message(FATAL_ERROR "Target architecture not known")
@@ -26,7 +31,7 @@ endif()
 file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/fftw")
 
 execute_process(
-    COMMAND ${CMAKE_COMMAND} -E tar xzf ${CMAKE_BINARY_DIR}/fftw.zip
+    COMMAND ${CMAKE_COMMAND} -E tar xzf "${filename}"
     WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/fftw"
     RESULT_VARIABLE ExitCode
 )
@@ -35,10 +40,12 @@ CheckExitCodeAndExitIfError("tar")
 get_filename_component(_vs_bin_path "${CMAKE_LINKER}" DIRECTORY)
 
 execute_process(
-    COMMAND "${_vs_bin_path}/lib.exe" /machine:x64 /def:${CMAKE_BINARY_DIR}/fftw/libfftw3-3.def /out:${CMAKE_BINARY_DIR}/fftw/libfftw3-3.lib
+    COMMAND "${_vs_bin_path}/lib.exe" ${LIBEXE_64} /def:${CMAKE_BINARY_DIR}/fftw/libfftw3-3.def /out:${CMAKE_BINARY_DIR}/fftw/libfftw3-3.lib
     WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/fftw"
+    OUTPUT_VARIABLE OutVar
+    ERROR_VARIABLE ErrVar
     RESULT_VARIABLE ExitCode)
-CheckExitCodeAndExitIfError("lib")
+CheckExitCodeAndExitIfError("lib.exe: ${OutVar} ${ErrVar}")
 
 target_link_libraries(${PROJECT_NAME} "${CMAKE_BINARY_DIR}/fftw/libfftw3-3.lib")
 target_include_directories(${PROJECT_NAME} PRIVATE "${CMAKE_BINARY_DIR}/fftw")

cmake/fftw-3.3.5-dll64.zip

@@ -37,10 +37,16 @@ Please adjust the path to Qt5. You can find the path with the command:
 
 ### [Windows](#windows)
 
-Run the **CMake GUI** program and select the source directory, build directory and your compiler.
-If your compiler is for example Visual Studio, cmake will generate a Visual Studio Project and solution file (\*.sln).
-Open the project and build it. If you use an IDE that has inbuild support for cmake projects like QtCreator,
-you can just open and build this project.
+We highly recommend to use QtCreator to build this software. All reported issues regarding other IDEs
+will be closed as invalid!
+
+* Open the project in QtCreator
+* Compile the software
+
+Hints for Visual Studio 2015/2017 users:
+* Install the right Qt package that matches your Visual Studio installation.
+* Build for 64bit. 32bit builds theoretically work, but you are on your own then.
+* Use the **CMake GUI** to setup all required Qt include and library paths.
 
 Microsoft Windows needs an installed driver for every usb device:
 

cmake/fftw_on_windows.cmake

@@ -43,10 +43,10 @@ else()
     target_compile_options(${PROJECT_NAME} PRIVATE "$<$<CONFIG:RELEASE>:-fno-rtti>")
 endif()
 
-if(WIN32)
-    include(../cmake/fftw_on_windows.cmake)
-    include(../cmake/libusb_on_windows.cmake)
-else()
+include(../cmake/fftw_on_windows.cmake)
+include(../cmake/libusb_on_windows.cmake)
+
+if(NOT WIN32)
     find_package(libusb REQUIRED)
     target_include_directories(${PROJECT_NAME} PRIVATE ${LIBUSB_INCLUDE_DIRS})
     target_link_libraries(${PROJECT_NAME} ${LIBUSB_LIBRARIES})