Error with compiling GCC-4.5.1

redkangaroo2055 · 02-21-2011, 10:31 AM

Hello. This is my first time doing an LFS build. The page to which I am referring to in the book is:
http://www.nl.linuxfromscratch.org/l...gcc-pass1.html
I have tried to stay as true to the directions as possible. I untarred gmp, mpc, and mpfr into the gcc-4.5.1 directory. I followed the directions as best I could, but no matter what I do, and I can't get gcc to compile properly.
As an additional note, I compiled binutils properly (as far as I know).

After doing the configure, and make, I get the following errors:

checking format of `long double' floating point... IEEE extended, little endian
checking for gmp.h... no
configure: error: gmp.h can't be found, or is unusable.
make[1]: *** [configure-mpfr] Error 1
make[1]: Leaving directory `/mnt/lfs/gcc-build/gcc-4.5.1'
make: *** [all] Error 2

The configure always seems to go correctly. I get the error above after I do 'make'. I assume that the main problem is that it can't find gmp.h. I initially assumed that it could have been that I downloaded a corrupted gmp-5.0.1.tar.bz2 because I couldn't find a gmp.h in it. After downloading it again, I still couldn't find it. After several more tries I reformatted the lfs drives a few times, restarting the project, but still always get the same error. Below a person had nearly an identical problem:
http://www.linuxquestions.org/questi...-5-1-a-837108/

But, the solution of the above url does not work for me. I followed the directions almost exactly, but the user in the url above deviated slightly which was the error.

Any and all help is appreciated.

Thanks

druuna · 02-22-2011, 01:20 AM

Hi,

You keep saying tried to, as best as and almost exactly...... With the LFS book it is very simple: You follow the book to the letter, if you do not things will go wrong.

Without knowing which host you are using (is it LFS compliant?) and if the previous steps taken went the way they should, I can only give you the first steps needed for chapter 5.5:

Code:

$ cd $LFS/sources

# remove possible left overs:
$ rm -rf gcc-4.5.1 gcc-build

# untar gcc + enter created directory:
$ tar xjf gcc-4.5.1.tar.bz2
$ cd gcc-4.5.1

# untar and move mpfr, gmp and mpc:
$ tar -jxf ../mpfr-3.0.0.tar.bz2
$ mv -v mpfr-3.0.0 mpfr
$ tar -jxf ../gmp-5.0.1.tar.bz2
$ mv -v gmp-5.0.1 gmp
$ tar -zxf ../mpc-0.8.2.tar.gz
$ mv -v mpc-0.8.2 mpc

# create and enter gcc build dir:
$ mkdir -v ../gcc-build
$ cd ../gcc-build

From this point on you start with ../gcc-4.5.1/configure \ .....

Hope this helps.

dalekirkwood · 02-24-2011, 12:18 PM

Thanks ,That seems to be worded better than in the book.