例如
makefile
all:
sed \
's/111/222/g; \
s/333/444/g;' \
file_001 > file_002
$make
makefile:2: target 'all' does not exist
sed \
's/111/222/g; \
s/333/444/g;' \
file_001 > file_002
sed: -e expression #1, char 27: unterminated address regex
makefile:2: recipe for target 'all' failed
make: *** [all] Error 1