I'M wanting to write my own command/script for compiling my c++ files. I use g++ -g -Wall filename.cpp -o filename
I'M trying to figure out how I can trip of the last four characters (.cpp) from a string. Any ideas?
I'M wanting to write my own command/script for compiling my c++ files. I use g++ -g -Wall filename.cpp -o filename
I'M trying to figure out how I can trip of the last four characters (.cpp) from a string. Any ideas?
Take a look at the make
command, which is made specifically for this kind of thing. Just create a Makefile
in the same directory as the source file(s). You can even try this without a Makefile
and make MyPrg
will compile the file based on the defaults.
#Makefile
MyPrg:
g++ -O3 -Wall MyPrg.cpp -o MyPrg
strip MyPrg
debug: MyPrg.cpp
g++ -g -Wall MyPrg.cpp -o MyPrg
touch debug
clean:
-rm debug MyPrg
To use this Makefile to generate MyPrg, run the make
command.~/src/cpp/MyPrg> make
This will use the first rule to make MyPrg from the given source file. If MyPrg.cpp changes, then calling make
will recompile MyPrg.~/src/cpp/MyPrg> make debug
This will use the debug: rule to create MyPrg to make that version of the program.~/src/cpp/MyPrg> make clean
This will remove the files generated using this Makefile.
I was trying to avoid hard coding MyPrg.cpp and MyPrg. I was going to use ${1} for command line arguments. So I would simply type "compile MyPrg.cpp" and my script would run g++ -g -Wall ${1} -o ${1 - last 4 characters}
hi,
v="myFile.cpp"
((${#v}>4)) && echo "${v:: -4}"
or
v="myFile.cpp"
echo "${v%.cpp}"
Also, check out the basename command
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