本文介绍了如何在 Makefile 中定义多个包含路径的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
New to C++; Basic understanding of includes, libraries and the compile process. Did a few simple makefiles yet.
My current project involves using an informix DB api and i need to include header files in more than one nonstandard dirs. How to write that ? Havent found anything on the net, probably because i did not use good search terms
This is one way what i tried (not working). Just to show the makefile
LIB=-L/usr/informix/lib/c++
INC=-I/usr/informix/incl/c++ /opt/informix/incl/public
default: main
main: test.cpp
gcc -Wall $(LIB) $(INC) -c test.cpp
#gcc -Wall $(LIB) $(INC) -I/opt/informix/incl/public -c test.cpp
clean:
rm -r test.o make.out
解决方案
You have to prepend every directory with -I:
INC=-I/usr/informix/incl/c++ -I/opt/informix/incl/public
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