How to use Automake to debug C++Makefile?

Methods for debugging C++ Makefile Add debugging flags (-Wall -Wextra -pedantic) Use automake --trace to view the Automake command Use automake --auto-make to quickly generate Makefile Use make VERBOSE=1 to output more detailed execution information

How to use Automake to debug C++ Makefile

Automake is a tool that can help us automatically generate Makefile, thereby simplifying our compilation work . When debugging C++ Makefile, Automake provides some useful functions that can help us quickly locate and solve problems.

Add debug flags

Adding debug flags in the Makefile can help us identify compilation and linking errors. For this we can use the following flags:

CPPFLAGS += -Wall -Wextra -pedantic

Use automake --trace

##automake --trace option will print out when running Detailed commands executed by Automake. This is useful for viewing the contents of the Makefile generated by Automake. We can use this option with the following command:

automake --trace

Use automake --auto-make

automake --auto-make option will automatically Generate Makefile without creating intermediate files. This helps us quickly test changes in the Makefile without having to rebuild it every time. We can use this option with the following command:

automake --auto-make

Use make VERBOSE=1

VERBOSE=1 option to make the make command print out more Detailed information, including commands being executed and errors detected. We can use this option through the following command:

make VERBOSE=1

Practical case

The following is a simple C++ Makefile, we can use Automake to debug it:

SRC = main.cpp
OBJ = main.o
EXE = main

CPPFLAGS += -Wall -Wextra -pedantic

all: $(EXE)

$(EXE): $(OBJ)
    $(CXX) $(CXXFLAGS) $^ -o $@

$(OBJ): $(SRC)
    $(CXX) $(CPPFLAGS) -c $^

Use Automake to debug the Makefile

We can use the following commands to use Automake to debug this Makefile:

automake --trace
automake --auto-make
make VERBOSE=1

These commands will output the Makefile, intermediate files and compilation commands generated by Automake . If any errors occur, we can review these outputs to locate the problem.

The above is the detailed content of How to use Automake to debug C++Makefile?. For more information, please follow other related articles on the PHP Chinese website!