So I've started work on a fresh LFS install. This time I am using the 8.1 stable book. Got chapter five done. Currently I am pausing before starting chapter 6.

In chapter 6, this time around, I'd like to compile some of the extra languages (fortran, go/golang, objective c & c++) as part of GCC, so that I would not need to recompile GCC later. If I understand the LFS and BLFS books correctly, I'll need DejaGnu. That in turn requires Expect... which needs TCL. So in order, I'd need to compile TCL, Expect and then DejaGNU. Logically I would do this *right* before compiling GCC.

Fortunately, all three packages are used in chapter 5, so I have LFS-approved versions of the sources already.

A question: can I just use the version already in /tools (from chapter five)?

Another question: if I *do* re-compile those three packages, should I then re-compile them *again* after GCC is in and working? keep in mind that when I compile them before GCC, it will be with the chapter 5 GCC yet the chapter 6 Glibc

Thank you.

Doesn't the book say in chapter 6 that compiling other languages is a job in the BLFS book? It requires a complete bootstrapped recompile of gcc? Don't ignore what they say.

It's your box; Read the small print; do what you like, but don't come crying when it doesn't work. If there was a lazier way, they'd have used it.

Right: some concrete and specific details of interest. The version of tcl used by LFS and BLFS is the same ... however, they are different.

tcl-core8.6.7-src.tar.gz is used in chapter five of the LFS book

tcl8.6.7-src.tar.gz is used in the BLFS book.

Looks like "core" is a minimal mix whereas the other is the full version. This clearly indicates that the version of TCL used in chapter five of LFS should not (or can not) be used when attempting to compile GCC to have extra languages.

So, just before the LFS book had me compile GCC, I compiled the full version of TCL. Seeing as how Expect depends on TCL and DejaGNU depends on Expect and how DejaGNU is needed the test phase of GCC, I then recompiled Expect and then DejaGNU.

The BLFS book had the GCC using the bootstrap option and the LFS book disabled is. I opted to follow the LFS and disable the bootstrap. So my command line was nearly exactly as in the LFS book, save for the additional languages:
The test results were excellent. Out of the tens of thousands of tests run, there were only eight unexpected failures. Five of them mentioned in the LFS book. The remaining three are in the tests of the go compiler. Go had over 2000 tests. Good odds. These results are better than any I've had in previous compiles of LFS.