Makefile在数组中查找

发布时间：2020-12-16 10:20:02 所属栏目：百科来源：网络整理

导读：如果我有这样的事情： PROJECTS += path/to/firstPROJECTS += path/to/secondPROJECTS += path/to/third 和 LIBS += lib_output/first.libLIBS += lib_output/second.libLIBS += lib_output/third.lib 我如何将PROJECTS = path / to / first中的项目与LIBS =

如果我有这样的事情：

PROJECTS += path/to/first
PROJECTS += path/to/second
PROJECTS += path/to/third

和

LIBS += lib_output/first.lib
LIBS += lib_output/second.lib
LIBS += lib_output/third.lib

我如何将PROJECTS = path / to / first中的项目与LIBS = lib_output / first.lib相关联？ makefile中是否有类似hashmap的东西？或者搜索阵列的可能性？

解决方法

您可以使用 computed variable names模拟查找表,以及使变量名称可以包含 some special characters(如点和正斜杠)的事实：

PROJECTS += path/to/first
PROJECTS += path/to/second
PROJECTS += path/to/third

LIBS += lib_output/first.lib
LIBS += lib_output/second.lib
LIBS += lib_output/third.lib

lookup.path/to/first  := lib_output/first.lib
lookup.path/to/second := lib_output/second.lib
lookup.path/to/third  := lib_output/third.lib

path := path/to/first
$(info ${path} -> ${lookup.${path}})
path := path/to/second
$(info ${path} -> ${lookup.${path}})
path := path/to/third
$(info ${path} -> ${lookup.${path}})

输出：

$make
path/to/first -> lib_output/first.lib
path/to/second -> lib_output/second.lib
path/to/third -> lib_output/third.lib

（编辑：李大同）

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