Solaris 10 x86 missing math functions in libm.

Question

I'm working with the 3/05 distribution on a 32-bit x86 box. I'm using gcc 3 and am compiling the following:
#include <stdio.h>
#include <math.h>
double x = 3.14;
int
main()
   printf("Hello.\n");
   if ( isnormal(x) )
      printf("x is normal.\n");
   else
      printf("x is abnormal.\n");
   return 0;
}An attempt at compilation yields:
maximus$ gcc -std=c99 -o missing missing.c -lm
missing.c: In function `main':
missing.c:10: warning: implicit declaration of function `__builtin_isnormal'
Undefined                       first referenced
symbol                             in file
__builtin_isnormal                  /var/tmp//ccGq9vPa.o
ld: fatal: Symbol referencing errors. No output written to missing
collect2: ld returned 1 exit statusAfter looking at this a while I found that none of the related functions, such as, isinf(), fpclassify() are available.
I'm new to Solaris 10, so I could be missing some sort of compiler flag or library flag, but this compiles fine on Mac OS as well as Linux...
Laszlo

Answer 1

The missing functions are implemented as macros in
/usr/include/iso/math_c99.h on Solaris 10, but the macros only work
with the Sun C compiler.
Current Solaris Express includes a GCC implementation in
addition to a Sun C implementation in <iso/math_c99.h>.
See bug 6285517:
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6285517