gcc not recognizing C++ keywords

gcc not recognizing C++ keywords

[Eric Evans]

Hello,

Sorry to have to ask what will probably seem like a stupid question.  But 
I'm kindof desperate here.  I am trying to compile (with make) a program on 
a RH 9 machine with gcc 3.2.2.  The compilation fails with lots of parsing 
errors, and it seems that all of the parsing errors are  caused by gcc 
failing to recognize C++ keywords such as class, public, etc.  It would 
seem, at least to my unexpert eye (I'm a newcomer to gcc), that gcc is 
trying to compile this thing as a C program instead of as a C++ 
program.  Yet I've been told that this program has been compiled 
successfully on other Linux systems.

I've emailed the author of the program for advice but this person is either 
ignoring me or is too busy to reply.  It occurs to me that I might not ever 
get a reply from the program's author, hence this plea for help.

I didn't want to include the whole Makefile in this message because it's 
rather large.  But does anybody out there have some suggestions for things 
I should look for in the Makefile that might have some bearing on this 
problem?  Since I'm rather naive about gcc, I'd appreciate any advice on 
how I could get started in troubleshooting this problem.  Thanks very much.

Eric

Re: gcc not recognizing C++ keywords

[Eljay Love-Jensen]

Hi Eric,

Is the compile doing:  "g++ -o foo foo.cpp" ?

Or is the compile doing:  "gcc -o foo foo.c" ?

Note, with GCC, C++ programs should use "g++" and have the extension .cpp 
.cc .cxx .c++ .cp or .C (capital C, on case-sensitive file systems only).

The extension can be ignored if "-x c++" is being used, since that 
overrides the extension check.

HTH,
--Eljay

Re: gcc not recognizing C++ keywords

[Eric Evans]

Hi,

Yes, you were quite right!  It is working now.  Thanks so much for the tip.

Eric

>Is the compile doing:  "g++ -o foo foo.cpp" ?
>
>Or is the compile doing:  "gcc -o foo foo.c" ?
>
>Note, with GCC, C++ programs should use "g++" and have the extension .cpp 
>.cc .cxx .c++ .cp or .C (capital C, on case-sensitive file systems only).
>
>The extension can be ignored if "-x c++" is being used, since that 
>overrides the extension check.
>
>HTH,
>--Eljay
>