Extract llvm function declarations from c header

lldecl.sh

#!/bin/bash
# EXAMPLE: ./lldecl.sh /usr/include/stdio.h

INFILE=$1
TMPFILE1=$(mktemp)".h"
TMPFILE2=$(mktemp)".c"

clang -E $INFILE -o $TMPFILE1

echo '#include "'$TMPFILE1'"' >> $TMPFILE2
echo 'int main() {' >> $TMPFILE2
ctags -x --c-kinds=fp $TMPFILE1 | awk '{ print "auto v"NR" = &"$1";" }' >> $TMPFILE2
echo '}' >> $TMPFILE2

clang $TMPFILE2 -c -S -emit-llvm -o- 2> /dev/null | grep 'declare'