在編寫Makefile時,如果遇到循環依賴的問題,可以通過重構代碼,使用前置聲明或者分離依賴關系來規避循環依賴。
以下是一些常見的方法:
all: target1 target2
target1: dependency1
# commands
target2: dependency2
# commands
all: target1 target2
target1: dependency1
# commands
target2: dependency2
# commands
dependency1: dependency3
# commands
dependency2: dependency1
# commands
dependency3:
# commands
.PHONY: all target1 target2 dependency1 dependency2
all: target1 target2
target1: dependency1
# commands
target2: dependency2
# commands
dependency1: dependency3
# commands
dependency2: dependency1
# commands
dependency3:
# commands
通過以上方法,可以有效地規避循環依賴的問題,確保Makefile的正確執行。