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#!/bin/sh
# version 20241107
scriptname="`basename $0`"
if [ x"${CC}" = x ]; then
echo "usage: env CC=<compiler> ${scriptname} feature.c"
echo '$CC not set'
exit 1
fi
if [ x"$1" = x ]; then
echo "usage: env CC=<compiler> ${scriptname} feature.c"
echo 'missing feature.c argument'
exit 1
fi
# input
tryname="$1"
# output
headermacro=`echo ${tryname} | sed 's/\.c//' | sed 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
# temporary
binname="${tryname}.tmp.bin"
logname="${tryname}.tmp.log"
cleanup() {
ex=$?
rm -f "${binname}" "${logname}"
exit "${ex}"
}
trap "cleanup" EXIT TERM INT
"${CC}" ${CFLAGS} -O0 -o "${binname}" "${tryname}" ${LDFLAGS} 1>"${logname}" 2>&1
if [ $? -eq 0 ]; then
echo "#define ${headermacro} 1"
else
echo "#undef ${headermacro}"
cat "${logname}" >&2
fi
exit 0
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