Re: Where is sqrtf?
Re: Where is sqrtf?
- Subject: Re: Where is sqrtf?
- From: Robert Purves <email@hidden>
- Date: Mon, 10 Jan 2005 00:02:45 +1300
Eric Albert wrote:
On Jan 8, 2005, at 7:18 PM, Robert Purves wrote:
Note: -lmx is required for C99 float functions such as sqrtf, in
math.h
When I try the same in Xcode (with -lmx specified in Other C Flags),
I get an error:
gcc-3.3: -lmx: linker input file unused because linking not done
ld: Undefined symbols: _sqrtf
How can I persuade Xcode that sqrtf exists?
Other C Flags is used for compiling, but -lmx is a linker flag. Other
Linker Flags is used for linking. Set that and this'll work.
A more Xcode-like way to do this is to add /usr/lib/libmx.dylib to
your project: Project->Add To Project, type '/' to get a Go To dialog,
go to /usr/lib, select libmx.dylib, and then build.
Thank you for the clear explanation.
Mike Lazear wrote:
In XCode I selected a new project of type "Carbon Application". I
replaced the standard main() with yours and it compiled, linked and
ran fine.
Interesting. That works because a Carbon Application is preset to link
to libstdc++.a (which presumably includes libmx). I chose to make my
test with a Standard Tool, which is not set up in that way. My choice,
combined with misunderstanding -lmx, excluded the C99 functions that I
wanted to investigate :-(
Robert P.
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