Survey of sizes of types

[Jens Schweikhardt]

hello, world\n

I am investigating what sizes of types GCC is using on various
implementations (native or cross compiler). If you want to help out,
please run the follwoing shell script. I promise it is not a virus and
it is spamming only my own email inbox :-)

I am especially interested in the non-i386 architectures and cross
compilers, e.g. amd64, sparc, mips, arm, powerpc, ... I'll summarize all
answers and post a summary here for you to enjoy. Thanks!

Regards,

     Jens

#!/bin/sh
#
# usage: mailsz [gccname]
# example: mailsz   # Will use "gcc"
# example: mailsz powerpc-linux-gcc

GCC=${1:-gcc} # your gcc binary name, eg. powerpc-linux-gcc or whatever.

# Set this to your own address if you want to see what you'll send.
RECIPIENT=schweikh@schweikhardt.net

cat << "EOF" > sizes.c
#include <stdio.h>
#include <wchar.h>

#define STR(x) #x
#define STREXP(x) STR(x)

static char
 sb[__CHAR_BIT__]         = "",
 sc[sizeof(char)]         = "",
 ss[sizeof(short)]        = "",
 si[sizeof(int)]          = "",
 sl[sizeof(long)]         = "",
 sll[sizeof(long long)]   = "",
 sw[sizeof(wchar_t)]      = "",
 sf[sizeof(float)]        = "",
 sd[sizeof(double)]       = "",
 sld[sizeof(long double)] = "",
 sp[sizeof(void *)]       = "";

int main (void)
{
  puts ("b " STREXP(__CHAR_BIT__));
  printf ("c %zd\n",  sizeof sc);
  printf ("s %zd\n",  sizeof ss);
  printf ("i %zd\n",  sizeof si);
  printf ("l %zd\n",  sizeof sl);
  printf ("ll %zd\n", sizeof sll);
  printf ("w %zd\n",  sizeof sw);
  printf ("f %zd\n",  sizeof sf);
  printf ("d %zd\n",  sizeof sd);
  printf ("ld %zd\n", sizeof sld);
  printf ("p %zd\n",  sizeof sp);
  return 0;
}
EOF

(
    $GCC -v -E -dM -x c /dev/null 2>&1
    # Create assembler input.
    $GCC -S sizes.c
    cat sizes.s
    # Create executable.
    $GCC -o sizes sizes.c
    ./sizes 2>/dev/null # Fails for cross compilers.
) | mailx -s "Sizes for $GCC" $RECIPIENT

# End of script.