Qt 5.2.0 Releated Questions?

[mp33919]

It can be done without IT by creating an entirely private instance of GCC 4.8.x, installed in say /home/you/gcc, and using the runtime environment (PATH and LD_LIBRARYPATH) to ensure the local gcc and libstdc++ is found first.

I finally installed (I think) gcc 4.8.x into my private directory:/home/me/mygcc. But when I check my gcc version: "yum list install gcc", or "gcc --version", I still got "gcc.x86_64 4.4.7-4.el6". I tried to set LD_RUN_PATH=/home/me/mygcc/lib64, still the Centos6.5 can not find my gcc 4.8.2's path. What should I do next?

[anda_skoa]

When you run "gcc --version" have you set $PATH so that it points to your gcc installation's bin directory?

Try "which gcc" to check which gcc executable is found by the shell.

Cheers,
_

[mp33919]

When you run "gcc --version" have you set $PATH so that it points to your gcc installation's bin directory?

Try "which gcc" to check which gcc executable is found by the shell.

Cheers,
_

I did: LD_LIBRARY_PATH=/home/me/mygcc/4.8.2/lib64
still the "which gcc" came from /usr/bin/gcc

after I did PATH=/home/me/mygcc/4.8.2/bin
$ which gcc
~/mygcc/4.8.2/bin/gcc
but, I can no longer use the any "regular" Linux command such as:
$ ls
bash: ls: command not found

I think that I screwed up the system, didn't I?

[stampede]

PATH=/home/me/mygcc/4.8.2/bin

PATH=/home/me/mygcc/4.8.2/bin

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should be more like

PATH=$PATH:/home/me/mygcc/4.8.2/bin

PATH=$PATH:/home/me/mygcc/4.8.2/bin

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I think that I screwed up the system, didn't I?

If it boots then it is ok where did you put this unfortunate PATH setting ?

[anda_skoa]

More like

PATH=home/me/mygcc/4.8.2/bin:$PATH

PATH=home/me/mygcc/4.8.2/bin:$PATH

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i.e. prepending the local path to the search list, so gcc from that location is found before the one from the system location

Cheers,
_

[stampede]

i.e. prepending the local path to the search list, so gcc from that location is found before the one from the system location

Exactly Few more years as windows developer and I'm gonna have to start with "Linux For Dummies" all over again :P

[mp33919]

Thanks both of you, anda_akoa and stampede. Since I used sh command line to put this unfortunate PATH, after re-boot the system, everything backs to "normal".
The whole purpose to install gcc4.8.2 is because I want to install Qt5.2.0 into my Centos6.5. After all these months, I finally can put the Qt5.2.1 into my machine. It was quite "ugly" what I did. I ended with copy libstdc++.so.6.0.18 into /usr/lib64 directory, and made a new link libstdc++.so.6 to libstdc++.so.6.0.18. After that, Qt5.2.1 did install "OK". Now, I do have a "new - small" problem, the Qt5.2.1 still goes to /usr/include to find the header files, but the Qt5.2.1's header files were installed in /usr/include/qt5. Will this set PATH re-direct the Qt5.2.1 to /usr/include/qt5? Or where else I can set the PATH in Qt5.2.1? And what commands should I use? PATH=/usr/include/qt5:$PATH?