Question

I’m trying to install GCC into /my/custom/path/gcc

but for some reason it installs into the normal installation path.

the commands i’m using:

configure --target=i686-pc-linux-gnu --disable-nls --enable-languages=c,c++ --without-headers
make DESTDIR=/my/custom/path/gcc
make DESTDIR=/my/custom/path/gcc install

What am I doing wrong?

Answer 1

You should run (in a new build tree outside of the source tree)

/your/source/path/to/gcc/configure --target=i686-pc-linux-gnu --prefix=/my/custom/path/gcc ...

and then GCC will become installed in /my/custom/path/gcc/bin/ with include files in /my/custom/path/gcc/include/, libraries in /my/custom/path/gcc/lib/ etc etc

I suggest using /opt/ or $HOME/pub as your prefix and you might also be interested by the --program-suffix=-foo option

(do that in a fresh new build tree outside of the source tree; your previous one is rotten)

After successive compilation with make, you can run in your build tree

make install DESTDIR=/tmp/mygccinst/

and finally, you can copy the definitive files with something like

cp -va /tmp/mygccinst/ /

You may need to run this copy as root…

PS the installation prefix is built-in the gcc driver binary, which actually runs cc1 or cc1plus etc…