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To: djgpp AT delorie DOT com
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Date: Wed, 02 Feb 2005 14:50:05 +0000
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Hi,
I compiled a test prog, referencing long double floating point functions (like cosl, sinl, etc.) with DJGPP 2.03, but these function names aren't found by the linker, even if I put the define <math.h> or <libm/math.h> statement inside the source code, and use the -lm switch.

This is the test program.


#include <libm/math.h>
#include <stdio.h>
#include <stdlib.h>

int main (void)
{
	long double	r1 = 0.0L, r2 = 0.0L, r3 = 0.0L, r4 = 0.0L, x = 0.0L;

	x = 1.320089L;
	r1 = sinl(x);
	r2 = cosl(x);
	r3 = expl(x);
	r4 = logl(x);
	printf("\n\n");
	printf("Variable x: %24.16Lf, r1: %24.16Lf, r2: %24.16Lf, r3: %24.16Lf, r4: 
%24.16Lf\n\n",x,r1,r2,r3,r4);

	return 0;
}


The error message returned during the compilation/linking is:

c:/djgpp/tmp/ccCsWzqh.o(.text+0x10c):test_long_double.c: undefined reference 
to `_sinl'
c:/djgpp/tmp/ccCsWzqh.o(.text+0x135):test_long_double.c: undefined reference 
to `_cosl'
c:/djgpp/tmp/ccCsWzqh.o(.text+0x15e):test_long_double.c: undefined reference 
to `_expl'
c:/djgpp/tmp/ccCsWzqh.o(.text+0x175):test_long_double.c: undefined reference 
to `_logl'
collect2: ld returned 1 exit status

even if I put the include of math.h (with or without libm/) in the source code.

Is something missing in the DJGPP math library? What can I do to use long double math functions?

Is there any math library, compatible with DJGPP 2.03, supporting such long double floating point functions?

Thanks in advance.

Luigi
(Italy)

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