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C question.
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C question.


  • Subject: C question.
  • From: Josh Morris <email@hidden>
  • Date: Sat, 15 Jun 2002 11:47:34 -0500

I am trying to make plib (plib.sourceforge.net) work aside my Cocoa
program so I can use its math routines.

Unfortunately, ProjectBuilder refuses to compile the header file because
it has multiple declarations of the same function. These functions have
different arguments, however.

Here's a snippet:

//Function #1
extern void sgMakeCoordMat4 ( sgMat4 dst, const SGfloat x, const SGfloat
y, const SGfloat z,
const SGfloat h, const SGfloat
p, const SGfloat r ) ;

//Function #2
inline void sgMakeCoordMat4( sgMat4 dst, const sgVec3 xyz, const sgVec3
hpr )
{
sgMakeCoordMat4 ( dst, xyz[0], xyz[1], xyz[2],
hpr[0], hpr[1], hpr[2] ) ;
}

Here are some of the errors:
/Users/jmorris/Documents/L3D/SG Library for OS X/sg.h:135: conflicting
types for `sgMakeCoordMat4'
/Users/jmorris/Documents/L3D/SG Library for OS X/sg.h:132: previous
declaration of `sgMakeCoordMat4'
/Users/jmorris/Documents/L3D/SG Library for OS X/sg.h: In function
`sgMakeCoordMat4':
/Users/jmorris/Documents/L3D/SG Library for OS X/sg.h:137: incompatible
type for argument 2 of `sgMakeCoordMat4'
/Users/jmorris/Documents/L3D/SG Library for OS X/sg.h:137: incompatible
type for argument 3 of `sgMakeCoordMat4'

I would guess that this has something to do with the namespace not
wanting to allow two same names. I thought that you were supposed to be
able to do this in C, provided there were different arguments. Is this a
build setting or something? I thought you could use Obj-C and C in the
same project. :/

Thanks for any help.

-Josh Morris
email@hidden
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