problem with short in va_arg list with 2.95.1 gcc

[Jim Terman]

I am having a problem with code that looks for type short in a va_arg list
when optimization is turned on.  There is no problem with no optimization.
It compiles fine but produces an undefined reference to `__va_arg_type_violation'
which I assume is delibrate to flag an error.  Is there a workaround besides
turning off optimizations?

If I compile the following file:
test.c
------
#include <stdarg.h>
#include <stdio.h>

void printout(short d, ...)
{
  va_list arglist;

  printf("%d ", d);
  d = va_arg (arglist, short);
  while (d)
    {
      printf("%s ", d);
      d = va_arg (arglist, short);
    }
}

int main()
{
  printout(1, 2, 0);
  printout(2, 3,  4, 0);
  return 0;
}

with the command line:

> gcc -v -O test.c
Reading specs from /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/specs
gcc version 2.95.1 19990809 (prerelease)
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/cpp -lang-c -v -D__GNUC__=2 -D__GNUC_MINOR__=95 -DPPC -D__ELF__ -Dpowerpc -D__PPC__ -D__ELF__ -D__powerpc__ -D__PPC -D__powerpc -Acpu(powerpc) -Amachine(powerpc) -D__CHAR_UNSIGNED__ -D__OPTIMIZE__ -D_CALL_SYSV -D_BIG_ENDIAN -D__BIG_ENDIAN__ -Amachine(bigendian) -D_ARCH_PPC -D__unix__ -D__linux__ -Dunix -Dlinux -Asystem(unix) -Asystem(posix) test.c /tmp/ccnguSmk.i
GNU CPP version 2.95.1 19990809 (prerelease) (PowerPC GNU/Linux)
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/../../../../ppc-redhat-linux/include
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/include
 /usr/include
End of search list.
The following default directories have been omitted from the search path:
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/../../../../include/g++-3
 /usr/local/include
End of omitted list.
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/cc1 /tmp/ccnguSmk.i -quiet -dumpbase test.c -O -version -o /tmp/ccwsSAdv.s
GNU C version 2.95.1 19990809 (prerelease) (ppc-redhat-linux) compiled by GNU C version 2.95.1 19990809 (prerelease).
 as -mppc -V -Qy -o /tmp/ccF8j30K.o /tmp/ccwsSAdv.s
GNU assembler version 2.9.5 (ppc-redhat-linux) using BFD version 2.9.5.0.14
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/collect2 -m elf32ppclinux -dynamic-linker /lib/ld.so.1 /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/crtbegin.o -L/usr/lib/gcc-lib/ppc-redhat-linux/2.95.1 /tmp/ccF8j30K.o /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/libgcc.a -lc /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/libgcc.a /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/crtend.o /usr/lib/crtn.o
/tmp/ccF8j30K.o: In function `printout':
/tmp/ccF8j30K.o(.text+0x60): undefined reference to `__va_arg_type_violation'
/tmp/ccF8j30K.o(.text+0x60): relocation truncated to fit: R_PPC_REL24 __va_arg_type_violation
collect2: ld returned 1 exit status

> gcc -v test.c
Reading specs from /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/specs
gcc version 2.95.1 19990809 (prerelease)
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/cpp -lang-c -v -D__GNUC__=2 -D__GNUC_MINOR__=95 -DPPC -D__ELF__ -Dpowerpc -D__PPC__ -D__ELF__ -D__powerpc__ -D__PPC -D__powerpc -Acpu(powerpc) -Amachine(powerpc) -D__CHAR_UNSIGNED__ -D_CALL_SYSV -D_BIG_ENDIAN -D__BIG_ENDIAN__ -Amachine(bigendian) -D_ARCH_PPC -D__unix__ -D__linux__ -Dunix -Dlinux -Asystem(unix) -Asystem(posix) test.c /tmp/ccTOmkZu.i
GNU CPP version 2.95.1 19990809 (prerelease) (PowerPC GNU/Linux)
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/../../../../ppc-redhat-linux/include
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/include
 /usr/include
End of search list.
The following default directories have been omitted from the search path:
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/../../../../include/g++-3
 /usr/local/include
End of omitted list.
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/cc1 /tmp/ccTOmkZu.i -quiet -dumpbase test.c -version -o /tmp/ccUI6hGQ.s
GNU C version 2.95.1 19990809 (prerelease) (ppc-redhat-linux) compiled by GNU C version 2.95.1 19990809 (prerelease).
 as -mppc -V -Qy -o /tmp/ccBIgJ3g.o /tmp/ccUI6hGQ.s
GNU assembler version 2.9.5 (ppc-redhat-linux) using BFD version 2.9.5.0.14
 /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/collect2 -m elf32ppclinux -dynamic-linker /lib/ld.so.1 /usr/lib/crt1.o /usr/lib/crti.o /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/crtbegin.o -L/usr/lib/gcc-lib/ppc-redhat-linux/2.95.1 /tmp/ccBIgJ3g.o /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/libgcc.a -lc /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/libgcc.a /usr/lib/gcc-lib/ppc-redhat-linux/2.95.1/crtend.o /usr/lib/crtn.o
> 
-- 
______________________________________________________________________________
Jim Terman       |   323 Vintage Park Dr.   |   Voice: (650) 356-5446
terman at ddi.com   |   Foster City, CA        |   Fax:   (650) 356-5490
Diab-SDS, Inc.   |   94404                  |   web site - http://www.ddi.com

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