g++ versus gcc
William Trenker
wtrenker@hotmail.com
Fri Dec 20 20:40:00 GMT 2002
(This has probably been asked a million times, but I did search the lists
and came up with only sketchy information.)
Today I upgraded my Linux 2.4.19 system from gcc 2.95.3 to gcc 3.2. I used
this test program:
#include <iostream>
struct test {
test(char* m) : msg(m) {};
char* msg;
};
main()
{
test* ptest = new test("Hello World");
cout << ptest->msg << endl;
};
To build this I used the time-honored: "gcc -o test test.cpp".
The build failed with the compiler complaining that "cout" and "endl"
weren't declared, and the linker grumbled that it couldn't resolve
references to "new", "delete", "cout", "basic_ostream" and other standard
objects.
A search on the mailing lists, and with Google, pointed out that I have to
explicitly decare namespace "std" -- gcc no longer defaults to "std".
Further searching suggested that I should be using "g++", not "gcc". Doing
both these things resulted in my little test program building and running
without error.
So now, it seems, we need to change all our makefiles, or the relevant
environment variables, to use "g++" instead of "gcc" for building c++ files.
I would appreciate confirmation that the use of "g++" has officially
replaced the use of "gcc" for c++ builds.
Thanks very much,
Bill Trenker
Kelowna BC Canada
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