I am just a freshman to linux.I want to know how to compile c++program in red hat 9, I tried to use gcc, but it return many things that i don't know. my program just a hello world program and using stl. another question is :I execute a makefile, but the system tell me that i don't have the right, but I login the system by root account, why?

Try with command g++
makefiles are run -- in a sense -- by issuing a command "make"

Use the g++ command. I don't see why you would have a problem running make, unless one of the commands in your makefile isn't set up right or your PATH variable needs something added.

You really shouldn't be root. If you are installing a program from a tarball, then the 'make install' step needs to be done as root. The rest of the time it is safer to work under your regular account.

Where are you trying to compile the program. If it is in a subdirectory in your home directory, you shouldn't have a problem, but some partitions may be mounted with the noexec option for security reasons.

To compile the program go to Terminal console and use command.

g++ -c myfile.cpp

this will generate myfile.o and you have to link it using

g++ -o myfile myfile.o

Now you have "myfile" that is executable, but to execute you have to change its modes use.

chmod +x myfile

Now run your program from the same directory by typing

./myfile

Only myfile will not work, Use " ./myfile ".

I don't know what can be wrong with your make, You better give the script of your make file and tell, What command are you using for make.