BASH 脚本编译多个 C++ 文件 - OpenCV

请参见在C++和OpenCV中调用其他文件中的函数 https://stackoverflow.com/questions/24442836/call-functions-in-other-files-in-c-and-opencv/对于最初的问题。我正在使用的代码在那里详细给出。这是一个子问题。

我有一个 BASH 脚本：

echo "compiling $1"
if [[ $1 == *.c ]]
then
    gcc -ggdb `pkg-config --cflags opencv` -o `basename $1 .c` $1 `pkg-config --libs opencv`;
elif [[ $1 == *.cpp ]]
then
    g++ -ggdb `pkg-config --cflags opencv` -o `basename $1 .cpp` $1 `pkg-config --libs opencv`;
else
    echo "Please compile only .c or .cpp files"
fi
echo "Output file => ${1%.*}"

上面的 BASH 脚本用于编译 OpenCV 代码./script.sh input.cpp.
我的疑问是如何修改它以同时编译多个文件，就像我在主代码中使用的具有某些功能的另一个文件一样，例如：
./script.sh input.cpp functions.cpp

EDIT
按照 John B 的建议，我将 BASH 脚本修改为

for f in "$@"; do
    echo "compiling $f"
    if [[ $f == *.c ]]
    then
        gcc -ggdb `pkg-config --cflags opencv` -o `basename "$f" .c` "$f" `pkg-config --libs opencv`
    elif [[ $f == *.cpp ]]
    then
        g++ -ggdb `pkg-config --cflags opencv` -o `basename "$f" .cpp` "$f" `pkg-config --libs opencv`
    else
        echo "$f is not .c or .cpp file"
    fi
    echo "Output file => ${f%.*}"
done

但现在，我收到以下错误：

compiling draw_shapes.cpp
/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../x86_64-linux-gnu/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status
Output file => draw_shapes
compiling test.cpp
/tmp/ccW65wuP.o: In function `main':
/home/kanishka/Desktop/opencv test/test.cpp:31: undefined reference to `draw_line(cv::Mat, cv::Point_<int>, cv::Point_<int>, int, int, int)'
collect2: error: ld returned 1 exit status
Output file => test

As 乔纳森·莱夫勒建议，最好使用 makefile。但如果你想使用 Bash 脚本，你可以使用以下命令调用所有参数$@并迭代每个。

for f in "$@"; do
    echo "compiling $f"
    if [[ $f == *.c ]]
    then
        gcc -ggdb `pkg-config --cflags opencv` -o `basename "$f" .c` "$f" `pkg-config --libs opencv`
    elif [[ $f == *.cpp ]]
    then
        g++ -ggdb `pkg-config --cflags opencv` -o `basename "$f" .cpp` "$f" `pkg-config --libs opencv`
    else
        echo "$f is not .c or .cpp file"
    fi
    echo "Output file => ${f%.*}"
done