About prefix on linux

[H.J. Lu]

> 
> hjl@lucon.org (H.J. Lu) writes:
> 
> > 2. Nothing is overridden. You can always get back your old compiler
> > by
> > 
> > # gcc -V version -b xxxx
> 
> This doesn't work if your old compiler supports ada and/or pascal because

# cd /usr/bin
# ls gcc* egcs*
egcs-970814    gcc-2.7.2.3    gcc-970125     gcc-970502     gcc-970706
egcs-970821    gcc-2.7.2.l.3  gcc-970202     gcc-970509     gcc-970713
egcs-970825    gcc-961118     gcc-970207     gcc-970522     gcc-970721
egcs-970828    gcc-961122     gcc-970214     gcc-970531     gcc-970725
egcs-970904    gcc-961215     gcc-970222     gcc-970606     gcc-970803
egcs-970907    gcc-961219     gcc-970314     gcc-970614     gcc.old
gcc            gcc-970106     gcc-970322     gcc-970621
gcc-2.7.2.1    gcc-970117     gcc-970421     gcc-970628

You can always do

	if [ -f $xxxxx/gcc.default ]
	then
		mv $xxxxx/gcc $xxxxx/gcc.default
	fi

while installing it.

> 
> > BTW, one thing comes to mind is now you have to add -L/usr/local/lib
> > just to get the right libstdc++.
> I solved this by moving the libstdc++.so link and libstdc++.a to the compiler
> directory ie. /usr/local/lib/gcc-lib/i586-linux/egcs-2.90.07 .
> 

Do you think it is a good solution? I think it is even worse than
-L/usr/local/lib since libstdc++ should be in sync with
/usr/local/include/g++. You are asking for trouble this way. Also,
that means "make install" doesn't work anymore.

That is just one potential problem. I don't know what else may
come up.


-- 
H.J. Lu (hjl@gnu.ai.mit.edu)