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Home » Language IDEs » C / C++ IDE (CDT) » Linking referenced project when building a static lib.(Looking for a way to create a static lib which contains the object from a couple ofother referenced projects.)

Linking referenced project when building a static lib. [message #854218]

Mon, 23 April 2012 15:35

Eclipse User

I currently have the following

lib a (static)
lib b (static)
lib c (reference static a, static b -- wrapper lib)

exec reference lib c (i do not want this project to know about lib a,b)

When I build lib c, as a static lib, I do not get the object of lib a,b packaged within the .a file.

Isn't there a way to achive this ?

Re: Linking referenced project when building a static lib. [message #854769 is a reply to message #854218]

Tue, 24 April 2012 04:18

Eclipse User

I am not sure if this is possible out of the box.
But you can try the following:
1) Open project properties of lib c
2) C/C++ Build->Settings
3) Select GCC Archiver
4) add the the object of lib a,b to the line

${COMMAND} ${FLAGS} ${OUTPUT_FLAG} ${OUTPUT_PREFIX}${OUTPUT} ${INPUTS}

Re: Linking referenced project when building a static lib. [message #855054 is a reply to message #854769]

Tue, 24 April 2012 09:41

Eclipse User

thanks Ill give it a try.

sokmething along those lines:

${workspace_loc:<liba>}/${ConfigName}/liba.a

?

Re: Linking referenced project when building a static lib. [message #855232 is a reply to message #855054]

Tue, 24 April 2012 12:20

Eclipse User

Sylvain Boily wrote on Tue, 24 April 2012 15:41

thanks Ill give it a try.

sokmething along those lines:

${workspace_loc:<liba>}/${ConfigName}/liba.a

?

I am not sure if the archiver ar accepts static libs (lib.a) as input. I was thinking about adding the object files (*.o) from liba. But if you have a lot of files that would be a mess ...

Wait, it seems to be possible!
From http://stackoverflow.com/questions/3821916/how-to-merge-two-ar-static-libraries-into-one
Quote:

Or you can simply use the "quick append" option (man ar, look at q or r)
ar q libaz.a libabc.a libxyz.a

Re: Linking referenced project when building a static lib. [message #855567 is a reply to message #855232]

Tue, 24 April 2012 19:34

Eclipse User

Awesome!

I will be trying this tomrorow, ill update this thread with my finding.

Thanks for your input.

Re: Linking referenced project when building a static lib. [message #857467 is a reply to message #855567]

Thu, 26 April 2012 11:08

Eclipse User

no luck, the -r option is already the default option. -q is the same as -r...

Ohh Well.

thanks though for your help.

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