On Sep 15, 10:47 pm, "William Stein" <[EMAIL PROTECTED]> wrote:
> ON 32-bit linux, i.e., meccah.math.harvard.edu, I get the following
> errors when trying to be build FLINT:
>
> flint.h:126: warning: implicit declaration of function `__builtin_clzl'
> gcc -std=c99 -I"/usr/include" -I/home/was/sage-bdist/local/include/
> -I/home/was/sage-bdist/local/include -funroll-loops
> -fexpensive-optimizations -fPIC -O3 -c mpz_poly.c -o mpz_poly.o
> In file included from mpz_poly.c:11:
> flint.h: In function `FLINT_BIT_COUNT':
> flint.h:126: warning: implicit declaration of function `__builtin_clzl'
> gcc -std=c99 -I"/usr/include" -I/home/was/sage-bdist/local/include/
> -I/home/was/sage-bdist/local/include -funroll-loops
> -fexpensive-optimizations -fPIC -O3 -c ZmodF_poly.c -o ZmodF_poly.o
> In file included from ZmodF_poly.c:14:
> flint.h: In function `FLINT_BIT_COUNT':
> flint.h:126: warning: implicit declaration of function `__builtin_clzl'
> gcc -std=c99 -I"/usr/include" -I/home/was/sage-bdist/local/include/
> -I/home/was/sage-bdist/local/include -funroll-loops
> -fexpensive-optimizations -fPIC -O3 Z_mpn-test.o test-support.o -o
> Z_mpn-test mpn_extras.o Z.o memory-manager.o Z_mpn.o ZmodF.o
> ZmodF_mul.o ZmodF_mul-tuning.o fmpz.o fmpz_poly.o mpz_poly-tuning.o
> mpz_poly.o ZmodF_poly.o -L/home/was/sage-bdist/local/lib/ -L"qd"
> -lgmp -lpthread -lm
> Z_mpn.o(.text+0x663): In function `__Z_mpn_mul':
> : undefined reference to `__builtin_clzl'
> Z_mpn.o(.text+0x67c): In function `__Z_mpn_mul':
> : undefined reference to `__builtin_clzl'
> Z_mpn.o(.text+0x1667): In function `Z_mpn_mul_precomp_init':
> : undefined reference to `__builtin_clzl'
> Z_mpn.o(.text+0x19cc): In function `Z_mpn_mul_precomp':
> : undefined reference to `__builtin_clzl'
> Z_mpn.o(.text+0x1bad): In function `__Z_mul':
> : undefined reference to `__builtin_clzl'
> Z_mpn.o(.text+0x1bc6): more undefined references to `__builtin_clzl' follow
> collect2: ld returned 1 exit status
> make: *** [Z_mpn-test] Error 1
> g++ -fPIC -shared -fPIC -o libflint.so mpn_extras.o Z.o
> memory-manager.o Z_mpn.o ZmodF.o ZmodF_mul.o ZmodF_mul-tuning.o fmpz.o
> fmpz_poly.o mpz_poly-tuning.o mpz_poly.o ZmodF_poly.o -lgmp
>
Looks like a gcc issue (from
http://sourceware.org/ml/libc-alpha/2005-12/msg00020.html):
GCC 3.4 and greater provide __builtin_clz which can be used for
a better and simpler implementation. This patch makes soft-fp use
these
built-in functions.
meccah uses a gcc 3.3.5.
Cheers,
Michael
> -------
>
> FLINT then doesn't work:
>
> sage: sage: from sage.libs.flint.fmpz_poly import Fmpz_poly
> ---------------------------------------------------------------------------
> <type 'exceptions.ImportError'> Traceback (most recent call last)
>
> /home/was/sage-bdist/<ipython console> in <module>()
>
> <type 'exceptions.ImportError'>:
> /home/was/sage-bdist/local/lib/libflint.so: undefined symbol:
> __builtin_clzl
>
> William
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