C to NASM Assembly

c2nasm.bash

#!/bin/bash
# thanks to http://stackoverflow.com/a/20743090
# thanks to https://github.com/diogovk/c2nasm
# install objconv: https://github.com/vertis/objconv
#
# $1: source code

set -e
C_FILE="$1"
BASE_NAME="${C_FILE%.*}"
O_FILE="$BASE_NAME.o"
NASM_FILE="$BASE_NAME.asm"
gcc -Werror=implicit-function-declaration -fno-asynchronous-unwind-tables -O0 -c -o "$O_FILE" "$C_FILE"
objconv -fnasm "$O_FILE" "$NASM_FILE"
sed -i 's|st(0)|st0  |g' "$NASM_FILE"
sed -i 's|noexecute|         |g' "$NASM_FILE"
sed -i 's|execute|       |g' "$NASM_FILE"
sed -i 's|: function||g' "$NASM_FILE"
sed -i 's|?_|L_|g' "$NASM_FILE"
sed -i -n '/SECTION .eh_frame/q;p' "$NASM_FILE"
sed -i 's|;.*||g' "$NASM_FILE"
sed -i 's/^M//g' "$NASM_FILE"
sed -i 's|\s\+$||g' "$NASM_FILE"
sed -i 's|align=1||g' "$NASM_FILE"
rm "$O_FILE"