如何使用.cpp文件的Makefile隐式规则？

Question

There is a Implicit rule in Makefiles for C++ files, that use .C or .cc extension. But I usually have the .cpp file extension for C++ source.

How to use the Implicit rule for Makefile with .cpp files?

Answer 1

See Catalogue of Implicit Rules :

Compiling C++ programs

no is made automatically from n.cc, n.cpp, or nC with a recipe of the form '$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c'. We encourage you to use the suffix '.cc' for C++ source files instead of '.C'.

Answer 2

This is from GNU make docs .

'%' in a prerequisite of a pattern rule stands for the same stem that was matched by the '%' in the target. In order for the pattern rule to apply, its target pattern must match the file name under consideration and all of its prerequisites (after pattern substitution) must name files that exist or can be made. These files become prerequisites of the target. Thus, a rule of the form

  %.o : %.c ; recipe... 

specifies how to make a file no, with another file nc as its prerequisite, provided that nc exists or can be made.

So you could try something similar to

%.o : %.cpp %.hpp
   $(CC) $(CFLAGS) $@