GCC Segmentation Fault Mac - c++

Question

I have been having some trouble getting my gcc and g++ compiler to work on my
mac (OSX Yosemite 10.10.2).
I have written up a simple "Hello World" program and even these seem to not
work. The two program that I tried to run are
hello.c
#include <stdio.h>
int main()
{
printf("Hello world\n");
return 0;
}
hello.cpp
#include <iostream>
int main()
{
std::cout << "Hello World";
}
I can compile the C program using cc hello.c and everything works fine, but
when I do gcc hello.c I get this error
[1] 38508 segmentation fault gcc hello.c
I get a similar error attempting to compile my C++ code
[1] 38596 segmentation fault g++ hello.cpp
I did which gcc and I get /opt/local/bin/gcc and that directory is in my
path.
( /usr/texbin /opt/local/bin /opt/local/sbin /bin /usr/sbin /sbin /usr/local/bin/usr/bin )
So I am confused as to what is happening. I thought I downloaded all of the
Xcode things that I needed. I would like to get gcc and g++ running
properly. I hope that you can help.
Thanks!

Answer 1

It seems that gcc and g++ have to be installed/added to the MAC os.
From your description, I would expect that the wrong version of those tools was installed.
This answer should help.
Be sure to read all the answers to the question before proceeding with a gcc installation.

Answer 2

I had a similar problem where even gcc --versionwas giving me a "Segmentation fault: 11". This is on OSX 10.10.5 with XCode 6.4. After much googling and no solution, I found that clang (Apple's LLVM-based C compiler) is intended to be a compatible replacement for gcc, so I just sym-linked gcc to clang as follows:
whence gcc #=> /usr/local/bin/gcc
whence clang #=> /usr/bin/clang
cd /usr/local/bin
sudo mv gcc gcc_OLD
sudo ln -s /usr/bin/clang /usr/local/bin/gcc
gcc -v
Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
Target: x86_64-apple-darwin14.5.0
Thread model: posix
Now I am able to successfully compile c-language stuff, like my ruby extensions.