What means the fat .gch file?

What means the fat .gch file?

[J.C. Pizarro]

$ du -s /opt/gcc4*/include/c++/4.*/i686-pc-linux-gnu/bits/
33793   /opt/gcc41320071029/include/c++/4.1.3/i686-pc-linux-gnu/bits/
64743   /opt/gcc42320071031/include/c++/4.2.3/i686-pc-linux-gnu/bits/
181     /opt/gcc43020071026/include/c++/4.3.0/i686-pc-linux-gnu/bits/

In /opt/gcc4*/include/c++/4.*/i686-pc-linux-gnu/bits/ there are
* 33.65 MB of stdc++.h.gch/ from gcc-4.1-20071029
* 32.38 MB of stdc++.h.gch/ from gcc-4.2-20071031
* 32.20 MB of stdtr1c++.h.gch/ from gcc-4.2-20071031
*        0 MB of no such dir. stdc++.h.gch/ from gcc-4.3-20071026

O0g.gch and O2g.gch from these dirs eat many MBs of disk space. Why?

What is there inside of fat .gch file? What means the .gch file?

   J.C. Pizarro

Re: What means the fat .gch file?

[Gerald Pfeifer]

On Thu, 1 Nov 2007, J.C. Pizarro wrote:
> What is there inside of fat .gch file? What means the .gch file?

This is a question for the gcc-help list, not gcc.  The latter is
for the development *of* GCC, not the development *with* GCC.

You can easily find the answer to your question by Googling for
"GCC .gch".  I just did that, and the first hit already answers
your question.

Or you can read our info documentation, for example by running
"info gcc" and search (by <Ctrl>-<S> for example) for ".gch" there.

Again, this is not a question suitable for the gcc list itself.

Gerald