On 2/1/19 4:43 PM, Bruce Dubbs via lfs-dev wrote:
On 02/01/2019 03:49 PM, Gavin Howard via lfs-dev wrote:
Hello,
I am the author of a bc with GNU extensions
(https://github.com/gavinhoward/bc) that enables it to help build the
Linux kernel. I think that my bc would be useful in Linux from
Scratch.
I have run through the entire LFS book with nothing changed except to
replace GNU bc with the current release of my bc
(https://github.com/gavinhoward/bc/releases/tag/1.1.3).
The required instructions are:
<<Begin instructions>>
Prepare Bc for compilation:
PREFIX=/usr CC=gcc CFLAGS="-std=c99" ./configure.sh -G -O3
The meaning of the configure options:
* PREFIX=/usr
Like --prefix in other packages.
* CC=gcc
Set the C compiler. This package defaults to c99, which doesn't
exist.
* CFLAGS="-std=c99"
Sets the C standard that gcc uses to be C99.
* -G
Disables tests in the test suite that requires another bc to
generate results for.
* -O3
Enables optimization. This bc gets an order of magnitude more
performance from optimizations, and these optimizations have been
tested.
Compile the package:
make
If desired, test bc:
make test
Install the package:
make install
<<End instructions>>
Would there be interest in switching to this new bc?
I would be open to this. The instructions seem to be a lot simpler
than what we have now. I'm interested in other opinions. In any case
I think we would postpone this until after our next release. (March 1st)
I do have one concern. There appear to be four releases in three days
(1.1.0, 1.1.1, 1.1.2, and 1.1.3) in three days. We really need
something a bit more stable than that.
-- Bruce
I am open to this as well. The release cadence seems to be quite often
though, we would prefer it to slow down first. I think after March 1st
is a good idea.
It's certainly a whole lot easier to build than the one that is in the
book right now.
Thanks for writing to us, Gavin!
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