Convert a C function to a lambda via executable strings.

c-lambda.bash

#!/usr/bin/env bash

read -p "Function return type: " val
if [ "$1" != "mini" ]; then
    read -p "Function name: " name
fi
read -p "Function argument list: " list

echo "$val $name($list) {" >f.c
echo "Enter code:"
cat >>f.c
echo "}" >>f.c

gcc -Os -c f.c
objcopy -O binary -j .text f.o foo

if [ "$1" = "mini" ]; then
    echo -n "(($val(*)($list))\""
    od -An -t x1 foo | tr -d '\n' | sed 's/ /\\x/g'
    echo "\")(INSERT ARGS HERE);"
else
    echo -n "$val (*$name)($list) = \""
    od -An -t x1 foo | tr -d '\n' | sed 's/ /\\x/g'
    echo \"\;
fi

rm f.c f.o foo

Suggest replacing references to f.c with /tmp/f$$.c and foo with /tmp/foo$$, etc. so you don't accidentally blow away any important files named f.c and foo