用shell进行c文件依赖的自动生成

淘汰了自己的C写的makefile生成。主要的功能是对当前目录下的c文件做依赖解析。生成的目标依赖没有递归处理，还需要自己把隐含的依赖加完整，不过这个脚本做的事已经足够提高效率的了，剩下的事情就很少了。
传递多个参数可以生成多目标的程序。

#!/bin/sh
# gen basic dep info. wuxb, 2008-6-7

echo "CC = gcc"
echo "CFLAGS = -Wall"
echo

for arg in $@
do
if [ -n "$arg" ]; then
    for i in `ls *.c`
    do
        if [ "$i" = "$arg"".c" ]; then
            echo -n "$arg"" :" # | awk '{{printf"%s :",$0}}'
            j=`grep '^#include.*"$' $i | sed 's/#include[ ]*\"\(.*\)\.h\"[ ]*$/\1\.o/' | awk '{{printf" %s",$0}}'`
            if [ -z "`echo "$j" | grep " $arg"".o"`" ]; then
                j="$j"" ""$arg"".o"
            fi
            echo "$j"
            echo '\t$(CC) $(CFLAGS) -o '"$arg""$j"
            break
        fi
    done
fi
done

# gen .o dep
for i in `ls *.c`
do
    j=`echo $i | sed 's/\(.*\)\.c/\1/'`
    echo -n "$j"'.o : '"$i"' '
    grep '^#include.*"$' $i | sed 's/#include[ ]*\"\(.*\)\"[ ]*$/\1/' | awk '{{printf" %s",$0}}'
    echo
    j=`echo $i | sed 's/\(.*\)\.c/\1/'`
    echo '\t$(CC) $(CFLAGS) -c -o '"$j"'.o '"$i"
done

echo ".PHONY : clean"
echo "clean :"
echo "\trm -f *.o $*"