🚀 go-pugleaf

We just upgraded from gcc 2.4.5 to 2.5.5 (on SunOS 4.1.1), and it looks
like enums are now unsigned.  Consider the following program:

% cat enum_unsigned.c

#include <stdio.h>

typedef enum {
  T_SOCKET_CHECK_READ,
  T_SOCKET_CHECK_WRITE
} T_SOCKET_CHECK_MODE;

int main()
{
  T_SOCKET_CHECK_MODE mode = 3;

  if (mode < T_SOCKET_CHECK_READ || mode > T_SOCKET_CHECK_WRITE) {
    printf("bad mode %d\n", mode);
  }
  return 0;
} 

Here's what I get when I compile this program with gcc 2.4.5 and the
(hopefully rather) picky flags we've been using:

% gcc245 -v -c -fpcc-struct-return -ansi -pedantic -Wall -Wshadow -Wid-clash-31 -Wpointer-arith -Wmissing-prototypes -Wnested-externs -g enum_unsigned.c 
Reading specs from /usr/local/lib/gcc-lib/sun4/2.4.5/specs
gcc version 2.4.5
 /usr/local/lib/gcc-lib/sun4/2.4.5/cpp -lang-c -v -undef -D__GNUC__=2 -trigraphs -$ -D__STRICT_ANSI__ -D__sparc__ -D__sun__ -D__unix__ -D__GCC_NEW_VARARGS__ -D__sparc -D__sun -D__unix -D__GCC_NEW_VARARGS__ -g -Wall -Wshadow -Wid-clash-31 -Wpointer-arith -Wmissing-prototypes -Wnested-externs -pedantic enum_unsigned.c /usr/tmp/cca18641.i
GNU CPP version 2.4.5 (sparc)
 /usr/local/lib/gcc-lib/sun4/2.4.5/cc1 /usr/tmp/cca18641.i -quiet -dumpbase enum_unsigned.c -g -Wall -Wshadow -Wid-clash-31 -Wpointer-arith -Wmissing-prototypes -Wnested-externs -pedantic -ansi -version -fpcc-struct-return -o /usr/tmp/cca18641.s
GNU C version 2.4.5 (sparc) compiled by GNU C version 2.4.5.
 as -o enum_unsigned.o /usr/tmp/cca18641.s

  No problem.  Now here's the same program, but compiled with gcc
2.5.5 instead of 2.4.5.

% gcc -v -c -fpcc-struct-return -ansi -pedantic -Wall -Wshadow -Wid-clash-31 -Wpointer-arith -Wmissing-prototypes -Wnested-externs -g enum_unsigned.c 
Reading specs from /usr/local/gnu/sun4_sunos_4_1_1/lib/gcc-lib/sparc-sun-sunos4.1.1/2.5.5/specs
gcc version 2.5.5
 /usr/local/gnu/sun4_sunos_4_1_1/lib/gcc-lib/sparc-sun-sunos4.1.1/2.5.5/cpp -lang-c -v -undef -D__GNUC__=2 -D__GNUC_MINOR__=5 -trigraphs -$ -D__STRICT_ANSI__ -D__sparc__ -D__sun__ -D__unix__ -D__GCC_NEW_VARARGS__ -D__sparc -D__sun -D__unix -D__GCC_NEW_VARARGS__ -Asystem(unix) -Asystem(bsd) -Acpu(sparc) -Amachine(sparc) -g -Wall -Wshadow -Wid-clash-31 -Wpointer-arith -Wmissing-prototypes -Wnested-externs -pedantic enum_unsigned.c /usr/tmp/cca18581.i
GNU CPP version 2.5.5 (sparc)
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/local/gnu/sun4_sunos_4_1_1/sparc-sun-sunos4.1.1/include
 /usr/local/gnu/sun4_sunos_4_1_1/lib/gcc-lib/sparc-sun-sunos4.1.1/2.5.5/include
 /usr/include
End of search list.
 /usr/local/gnu/sun4_sunos_4_1_1/lib/gcc-lib/sparc-sun-sunos4.1.1/2.5.5/cc1 /usr/tmp/cca18581.i -quiet -dumpbase enum_unsigned.c -g -Wall -Wshadow -Wid-clash-31 -Wpointer-arith -Wmissing-prototypes -Wnested-externs -pedantic -ansi -version -fpcc-struct-return -o /usr/tmp/cca18581.s
GNU C version 2.5.5 (sparc) compiled by GNU C version 2.5.5.
enum_unsigned.c: In function `main':
enum_unsigned.c:12: warning: unsigned value < 0 is always 0
 as -o enum_unsigned.o /usr/tmp/cca18581.s

Notice how it complains about an "unsigned value".

If anyone can shed some light on this problem, I'd sure appreicate it.
-- 
Thanks in advance...
Scott Weitzenkamp, Talarian Corporation, Mountain View, CA
scott@talarian.com OR uunet!talarian!scott     	(415) 965-8050
"Welcome to the late show, starring NULL and void" -- Men At Work