如何从本地Windows .dll和/或.lib文件创建与Cygwin兼容的库文件

Question

I have downloaded both a .dll and a .lib file compatible for 32-bit Windows from libspotify . The project I am working on requires me to use other libraries that does not work on Windows, but compile and work using Cygwin. I therefore need a way to get the .dll and/or .lib file "converted" into a compatible Cygwin format. Is that possible?

The .dll file does not contain symbols, so the suggested method described in the bottom of the Cygwin doc did not work.

The other libraries that I have, generated the following files:

/usr/local/lib/{libname.la, libname.dll.a and sometimes libname.a}
/usr/local/bin/cyglibname.dll

Where libname is the name of the library correctly compiled and installed. How do I get these files from the native 32-bit Windows .dll and .lib files?

Update:

I tried to include the full path to the .dll file instead of using -l and -L as I am used to linking libraries, and I got the following message:

/usr/bin/ld: i386 architecture of input file `/usr/local/test/libspotify.dll' is 
incompatible with i386:x86-64 output

It seems like the problem is the 32-bit vs 64-bit. Anyone know how to fix that?

Another update:

It worked by adding -m32 to CFLAGS and LDFLAGS. I now got a different error that I believe is irrelevant for the original question.

Answer 1

It seems like the problem is the 32-bit vs 64-bit. Anyone know how to fix that?

Yes; use 32 bit Cygwin for a project that depends on third party DLL's only available in 32 bit form. Do not use 64 bit Cygwin.

Cygwin and Cygwin-64 can be installed side by side, by the way. (And it's possible to share the same home folder between them, so you don't have to duplicate your .bashrc and whatnot.)

This is not a Cygwin problem. If you build a 64 bit executable with, say, Microsoft Visual Studio, it also will not load the 32 bit libspotify DLL.