This is the mail archive of the
binutils@sourceware.org
mailing list for the binutils project.
Re: RFC: Sort input section by list
Nick Clifton wrote:
Hi Arjan,
I suppose we chose differently; from a distro point of view patching
each app's code that big
is a no go for us; once the new binutils is released we can automate
and use the new feature
pretty quickly.
Add to this that which functions are on the list will also depend on
which arguments you pass to configure...
sorry but really the "just patch the code in 3000 places" is really
not going to work ;-(
Would you agree that if a using-currently-available-tools process could
be automated then it would be an acceptable solution to you ?
Lets assume that you have gotten to the stage where you have the
profiled list of functions in the order you wish them to appear in the
final binary. Lets also assume that you have compiled the sources with
-ffunction-sections. You could use a sed/awk script to convert the
function names into a linker script fragment that specifically
references each of the function sections by name. Then all you would
need is a slightly modified default linker script that INCLUDEs this
constructed fragment at the right place in the generic linker script.
I've done this before (at my previous employer); it includes getting gcc to dump its linker
script, then running a perl/sed script on it to add this and then finding a way
to get this linker script used. So far so good.
it just becomes impossible in an autoconf/automake/libtool world...
unless we do a gross hack and have an environment variable for such a lookaside linker script instead
(LD_SCRIPT_PREINCLUDE?).. that would solve the issue as well.