Replacement for GMP as Bignum: ARPREC? Haskell?; OS-X and OpenSSL

[Duncan Coutts]

On Sun, 2006-07-30 at 11:53 +0100, Brian Hulley wrote:
> p.tanski at gmail.com wrote:
> > GHC Task Ticket # 601 suggests replacing GMP with OpenSSL's Bignum
> > library, BN. I have two questions concerning this:
> 
> >From the ticket, this looks very scary:
> 
>           but its LGPL license is problematic for users of GHC
>          (it prohibits static linking of GHC-compiled programs, for 
> example).
> 
> Does this mean I can't distribute my Haskell app as a commercial 
> application? I certainly don't want to distribute source code and I've got 
> no idea how to compile a Haskell app other than using ghc --make, which 
> creates a single exe ie with static linkage.

GHC only statically links Haskell code. It dynamically links to GMP and
the system C library and other C libs.

So you're fine.

On unix you can check for yourself with ldd. It lists all the shared
libs that your program needs. For example:

$ ldd /usr/lib/ghc-6.4.2/ghc-6.4.2
        libreadline.so.5 => /lib/libreadline.so.5 (0x00002b568fca6000)
        libncurses.so.5 => /lib/libncurses.so.5 (0x00002b568fde3000)
        libdl.so.2 => /lib/libdl.so.2 (0x00002b568ff3f000)
        libm.so.6 => /lib/libm.so.6 (0x00002b5690042000)
        libgmp.so.3 => /usr/lib/libgmp.so.3 (0x00002b569019a000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00002b56902cf000)
        libc.so.6 => /lib/libc.so.6 (0x00002b56903e4000)
        /lib64/ld-linux-x86-64.so.2 (0x00002b568fb8e000)

Duncan