A seemingly simple problem

Apollo · Post by **Apollo** » Mon Mar 06, 2006 5:31 am

I see under ps2dev/ee/ee/include that there is a math.h file, but when I include this and try to use the sin and cos functions I get this error.

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obj/spiral.o&#40;.text+0x90&#41;&#58; In function `spiral'&#58;
spiral.c&#58; undefined reference to `litodp'
obj/spiral.o&#40;.text+0x98&#41;&#58;spiral.c&#58; undefined reference to `cos'
obj/spiral.o&#40;.text+0xa0&#41;&#58;spiral.c&#58; undefined reference to `dptofp'
obj/spiral.o&#40;.text+0xac&#41;&#58;spiral.c&#58; undefined reference to `litodp'
obj/spiral.o&#40;.text+0xb4&#41;&#58;spiral.c&#58; undefined reference to `sin'
obj/spiral.o&#40;.text+0xbc&#41;&#58;spiral.c&#58; undefined reference to `dptofp'
collect2&#58; ld returned 1 exit status
make&#58; *** &#91;spiral.elf&#93; Error 1

I'm new to the ps2 and all I am making is a simple rotating hypnotic spiral. Any ideas why the functions won't work?

Post by **Drakonite** » Mon Mar 06, 2006 7:01 am

You need to link with libm.

In other words, you need to add -lm to the EE_LIBS line the makefile.

Apollo · Post by **Apollo** » Tue Mar 07, 2006 12:49 pm

That brought about a ton of more errors. I am using the binary sdk of the website. I'm going to download the cygwin toolchain tonight and maybe that will help. Thanks for the response.

Post by **Drakonite** » Tue Mar 07, 2006 12:53 pm

Linking order DOES matter

Apollo · Post by **Apollo** » Wed Mar 08, 2006 7:38 am

Is this correct?

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spiral.elf&#58; $&#40;C_OBJ&#41; $&#40;S_OBJ&#41;
	@echo "-------------------------------------------------"
	$&#40;CC&#41; $&#40;CFLAGS&#41; -Tlinkfile -o spiral.elf $&#40;C_OBJ&#41; $&#40;S_OBJ&#41; -lm -Wl,-Map,spiral.map

Post by **Drakonite** » Wed Mar 08, 2006 9:25 am

Eww.. you might want to look at the sample makefiles... There should be numerous libraries being linked, and I don't see where any of them are being added...

Apollo · Post by **Apollo** » Wed Mar 08, 2006 11:03 am

I'm going off of dreamtime's demos. I'll try to look at other examples.

Apollo · Post by **Apollo** » Wed Mar 08, 2006 2:41 pm

Any hints would be greatly appreciated though.

Post by **Drakonite** » Wed Mar 08, 2006 3:10 pm

I'm using a modified version of the sample makefiles included with ps2sdk.

You should probably have something like '-lm -lc -lkernel -lsyscall -lc'

Post by **jbit** » Thu Mar 09, 2006 2:11 am

By the way, libmf (part of ps2sdk) is supposed to be faster than libm (part of newlib), so you might want to use that.

evilo · Post by **evilo** » Thu Mar 09, 2006 4:09 am

duh... I wasn't aware of that !! I MUST test it ASAP !

thanks for the tip :)