Building gmp library for the iPhone-Update

[Pierre-Henri Jondot]

Le 16 juil. 09 à 11:45, Torbjorn Granlund a écrit :

> Pierre-Henri Jondot <mpkju at free.fr> writes:
>
>  Trying to build a gmp library for arm without asm, I replaced arm-
>  apple-darwin host with none-apple-darwin (but keeping the arm cross-
>  compiler with CC flag) I could  build an arm library.
>
>  That said, I have been unable to build a simple test case, the link
>  stage failing with :
>  Undefined symbols:
>    "___gmpn_invert_limb", referenced from:
>        _mpn_mod_1_unnorm in libgmp.a(mod_1.o)
>        _mpn_mod_1_norm in libgmp.a(mod_1.o)
>
> Usually, a host cpu of "none" should pass -DNO_ASM.  If you look at  
> the
> compiler invokations, didn't that happen?  (The logic for -DNO_ASM  
> is in
> the configure script, you can locate it easily.)
>
> (Possibly, the cross-compilation motivated overriding of various
> parameters might have inhibited -DNO_ASM.)
>
> -- 
> Torbjörn


Yes,

For some reason indeed, the -DNO_ASM was not there...

So I've added it to the configure invocation, which is now :
./configure CC="/Developer/Platforms/iPhoneOS.platform/Developer/usr/ 
bin/gcc-4.2" CPP="/Developer/Platforms/iPhoneOS.platform/Developer/usr/ 
bin/gcc-4.2 -E" LD="/Developer/Platforms/iPhoneOS.platform/Developer/ 
usr/bin/ld" CPPFLAGS="-arch armv6 -isysroot /Developer/Platforms/ 
iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk -miphoneos-version- 
min=3.0 -DNO_ASM" --disable-shared --enable-static --prefix=/Developer/ 
Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/local -- 
host=none-apple-darwin9

The library I obtained this way allowed me this time to build a simple  
test case and run it on an iphone.

I'll try to investigate a bit about the asm file that fails to build,  
but I know no arm asm (or no asm at all I should say) and so far I  
have not been able to find much documentation, or at all, about  
apple's compiler, so most probably "porting GMP to the iPhone" will be  
out of my league...

Regards,

Pierre-Henri