Creating a .so from a .a library
September 27, 2005 04:02 PM
Hi,
Newton provides a .a file in their library. My game, however - is .NET. I would like to wrap Newton and use it in my engine, but this requires a .so file, which is not provided. Is it possible for me to "roll my own" ? I do not have source code, only the library file and the headers.
Ollie
"It is better to ask some of the questions than to know all the answers." ~ James Thurber[ mdxinfo | An iridescent tentacle | Game design patterns ]
1,658
September 27, 2005 04:04 PM
I don't think that's possible. As well as being built as a shared library (-shared), .so must contain position-independent code and as such must be compiled specially. So, unless the library has been compiled with -fPIC (even though it's still a static lib), I doubt it's going to work.
"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." — Brian W. Kernighan
September 27, 2005 04:44 PM
Aight - thanks for the snappy reply Fruny, I'll pass this information on to the Newton developer :)
Ollie
"It is better to ask some of the questions than to know all the answers." ~ James Thurber[ mdxinfo | An iridescent tentacle | Game design patterns ]
168
September 28, 2005 12:49 PM
well, you could try:
/Nico
ld --whole-archive -share -o foo.so foo.a/Nico
September 29, 2005 07:38 AM
Quote: Original post by Fruny
I don't think that's possible. As well as being built as a shared library (-shared), .so must contain position-independent code and as such must be compiled specially. So, unless the library has been compiled with -fPIC (even though it's still a static lib), I doubt it's going to work.
It can work, I did it once for some X library that my dist decided for some obscure reason to supply as .a only. I didn't do it exactly like NicoDeLuciferi (though his way probably works), I just extracted al the .o files from the lib with ar, and then instructed ld to build a shared library out of them. I didn't have any problems using the resulting .so.
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