Compatibility of *.dll *.a *.lib *.def between VisualStudio and gcc

Question

this is very confusing. I spent a lot of time reading posts on this on stack, etc. Still confused.

I am using Qt and C++ for coding. In Qt, I am using the gcc optio

Answer 1

question 1: you should import .h file and link .a file by linker command and copy .dll near your .exe output.

question 2: you can make .a file by .def file

set PATH=C:\Program Files\CodeBlocks\MinGW\bin;%PATH%

dlltool.exe -d libfftw3-3.def -l libfftw3-3.a

question 3: no. you can make .def file manually and after make .a file.

question 4,5: yes

question 6: I think it is depend on your hardware and operation system not on your compiler.

question 7: I don't know.

question 8: you need only .h .a .dll not .def

question 9: .lib files is for visual studio.

question 10: no you need .def and .dll to make .lib and you can make . def yourself if you don't have it.

set PATH=C:\Program Files\Microsoft Visual Studio 12.0\VC\bin;%PATH%

lib /machine:x86 /def:libfftw3-3.def

or

lib /machine:x64 /def:libfftw3-3.def

Question 11: yes i told you above.

question 12: yes

question 13: no.