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|
#!/bin/sh
############################################################
# Copyright (c) 2009-2010 by Aleksey Cheusov
#
# See COPYRIGHT file in the distribution.
############################################################
set -e
LC_ALL=C
export LC_ALL
##################################################
# options
usage (){
cat <<EOF
mkc_check_sizeof detects sizeof(type)
by compiling a test program.
mkc_check_sizeof doesn't run a generated executable
and therefore is ready for cross-compiling.
Usage: mkc_check_sizeof type [headers...]
Examples:
mkc_check_sizeof 'void*'
mkc_check_sizeof long-long
mkc_check_sizeof size_t stdlib.h
EOF
}
if test $# -eq 0; then
usage
exit 1
fi
if test "_$1" = '_-h' -o "_$1" = '_--help'; then
usage
exit 0
fi
##################################################
# initializing
type=`echo $1 | tr ' -' ' '`
pathpart=sizeof_`echo $type | tr '* ' 'P~'`
shift
. mkc_check_common.sh
##################################################
# test
try_it (){
# succeedes if size is bad
# $1 - test size
# $2.. - #includes
sz=$1
shift
for f in $MKC_COMMON_HEADERS "$@"; do
echo "#include <$f>"
done > "$tmpc"
cat >> "$tmpc" <<EOF
int main ()
{
switch (0){
case sizeof ($type): break;
case $sz: break;
}
return 0;
}
EOF
if $CC -c -o "${tmpo}" $CPPFLAGS $CFLAGS "${tmpc}" 2>"${tmperr}"; then
return 0
else
return 1
fi
}
check_itself (){
if try_it 2147483647 "$@"
then
for sz in 4 8 2 1 16 12 3 5 6 7 9 10 11 13 14 15; do
if try_it $sz "$@"
then
:
else
echo $sz
return
fi
done
fi
echo failed
}
check_and_cache "checking for sizeof ${type}" "$cache" "$@"
##################################################
# clean-ups
cleanup
##################################################
# finishing
printme "$ret\n" 1>&2
echo $ret
|
