renamed GMP symbols in GHC
nomeata at debian.org
Wed Jan 4 22:00:04 CET 2012
Am Mittwoch, den 04.01.2012, 20:50 +0100 schrieb Axel Simon:
> On 04.01.2012, at 17:50, Joachim Breitner wrote:
> > BTW, Is there a way to get the linker to create two independent copies
> > of a library in one program space? Maybe if it is compiled as PIC
> > (random name dropping here)? That would seem to be an elegant solution,
> > as it makes the distro packers happy and you would not have to maintain
> > a code copy.
> In the past, I've linked a C++ library that used gmpxx against a
> Haskell program by renaming all symbols starting with gmp to mygmp
> using objcopy. Unfortunately, this is not portable and completely
> broke down on Mac OS when Apple moved to fat binaries (Intel and
> PowerPC) since their objcopy version was crippled (there doesn't even
> seem to be an objcopy anymore on later OS X versions). Thus, renaming
> symbols after compilation is non-portable and sometimes not possible
> without writing your own tool.
> So, I propose to revert to renaming the symbols in the source code
> which could probably be done automatically using a lot of CPP
> #defines, starting from some sort of source code tar ball of gmp. This
> would also allow to always use the latest gmp sources without too much
Just to more random ideas that can probably easily dismissed by more
Would linking gmp statically help? E.g. is there a way to link libgmp
into the RTS that the symbols are not visible to the linker any more?
And would dlopen make a difference? RTLD_LOCAL sounds interesting...
Joachim "nomeata" Breitner
nomeata at debian.org | ICQ# 74513189 | GPG-Keyid: 4743206C
JID: nomeata at joachim-breitner.de | http://people.debian.org/~nomeata
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