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Atari coding BBS
| Re: LDFLAGS in Makefile |
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Posted by: mikro
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Apr,10.2008-13:35
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yes, it's simple but no, not _such_ simple ;)
simply, you have to know two things:
- where your library is (e.g. /usr/local/lib)
- what is its name (e.g. libsdlmixer.a)
now, you have to tell gcc this stuff. the path is often not an issue (gcc knows that libs can be found also in /usr/local/lib) but in some special cases you have to add it manually:
LDFLAGS=-L/usr/local/lib
(you can also add it to CFLAGS instead of LDFLAGS, if you prefer -- it has the same effect)
the tricky stuff comes with library name... linker wants its name in special form -- without "lib" prefix and without ".a" suffix... i.e. libsdlmixer.a becomes: sdlmixer, in our context:
LDFLAGS=-L/usr/local/lib -lsdlmixer
(please note that difference between -L and -l)
and... that's it ;) Math library (libm.a) is for example just "m" so if you use some math stuff, you add "-lm" to your gcc command line.
have fun! ;-)
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