Metaticket: remove c_lib

[jdemeyer]

Move c_lib code to Cython modules, or refactor code to no longer use c_lib:

• #17180: Move and fix rational reconstruction
• #10103: Remove gmp_globals and gmp.pxi
• #17668: Replace PY_NEW and PY_NEW_SAME_TYPE by new() method
• #17726: Replace PY_TYPE() by type()
• #17725: Replace PY_TYPE_CHECK_EXACT
• #17800: Replace PY_TYPE_CHECK and IS_INSTANCE by isinstance
• #17862: Remove use of PY_IS_NUMERIC
• #17625: Remove init_csage_module()
• #17789: Remove c_lib/src/ZZ_pylong.cpp
• #17853: Implement mpz <-> Python int/long in Cython
• #17788: PARI: store GEN as mpz/mpq
• #17784: Modernize NTL error handler
• #17819: Use unsigned long for Integer.divisors
• #17881: Move memory functions from c_lib to Cython
• #17882: Cython clean-up in fast_eval.pyx
• #17889: Unify base_extend, base_extend_c, base_extend_c_impl
• #17890: Remove _(rich)cmp_c_impl
• #17900: Setup interrupts in Cython
• #17915: Stop including mpz_pylong.h and mpz_longlong.h
• #17916: Move PARI array element assignment macros to parisage.h
• #17952: Actually remove c_lib files
• #18007: Move includes of interrupt.pxi to pyx files
• #18030: Clean-up stdsage.pxi includes
• #18027: Move interrupts to Cython
• #18367: Move ntl_wrap to Sage library

[fbissey]

That's ambitious and will remove one barrier to having simultaneous python2.7 and python3.x installs at the same time (the others being polybori and pynac).

[fbissey]

Hum... That will get rid of the last doctest that give a different result with gmp than with mpir.

[jdemeyer]

Replying to fbissey:

Hum... That will get rid of the last doctest that give a different result with gmp than with mpir.

Which doctest?

[fbissey]

I should have commented in #17881, commenting here was a mistake. I am talking about the doctest you removed so far in sage/rings/integer.pyx it gives a sligthly different answer for gmp than mpir. This is something we have identified a while ago with Jean-Pierre Flori.

For info this is what it gives for gmp:

**********************************************************************
File "/usr/share/sage/src/sage/rings/integer.pyx", line 1938, in sage.rings.integer.Integer.__pow__
Failed example:
    2^(2^63-2)
Expected:
    Traceback (most recent call last):
    ...
    MemoryError: failed to allocate 1152921504606847008 bytes  
Got:
    gmp: overflow in mpz type
    Traceback (most recent call last):
      File "/usr/lib64/python2.7/site-packages/sage/doctest/forker.py", line 488, in _run
        self.compile_and_execute(example, compiler, test.globs)
      File "/usr/lib64/python2.7/site-packages/sage/doctest/forker.py", line 850, in compile_and_execute
        exec(compiled, globs)
      File "<doctest sage.rings.integer.Integer.__pow__[27]>", line 1, in <module>
        Integer(2)**(Integer(2)**Integer(63)-Integer(2))
      File "sage/rings/integer.pyx", line 1977, in sage.rings.integer.Integer.__pow__ (build/cythonized/sage/rings/integer.c:12942)
        sig_on()
      File "sage/ext/c_lib.pyx", line 85, in sage.ext.c_lib.sig_raise_exception (build/cythonized/sage/ext/c_lib.c:1035)
        raise RuntimeError(msg)
    RuntimeError: Aborted

[jdemeyer]

Yes, GMP has some extra error checking that MPIR doesn't have.

Anyway, this doctest will not be removed, just moved to a different file in #17881.

[fbissey]

Indeed it escaped my attention. So it will just move a bit. No biggy in any case.

[jdemeyer]

Last 10 new commits:

​57e9278	More removals of cdefs.pxi
​370106d	Even more removals of cdefs
​1accad6	Remove cdefs.pxi from .pxd/.pxi files
​ec497b4	Merge tag '6.8.beta0' into HEAD
​b5a143f	Move ntl_wrap to Sage library
​ca87ba3	Add Cython patches to improve handling of dependencies
​a1ad51c	Define some library dependencies in .pxd/.pxi files
​941fa74	Merge tag '6.8.beta0' into t/18450/define_library_dependencies_in__pxd_files
​f67c28f	Merge commit '941fa7420f1942114f88bb3a03bd84bb1997d896' into ticket/17854
​f35cb98	Remove c_lib

[git]

Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:

​3032455

Remove c_lib

[git]

Branch pushed to git repo; I updated commit sha1. New commits:

​ae16699	Merge tag '6.8.beta2' into HEAD
​8b83481	Move pari/decl.pxi to pari/paridecl.pxd
​1c72dd6	partitions_c.cc needs gmp and mpfr libraries
​87be62b	Correct Jonathan Bober's name
​0be796e	Add ecm library before gmp
​d4839b3	Merge commit '0be796e608b4e876e01d2e17a30fc5a00867e795' into t/17854/ticket/17854
​6cf2f45	Merge tag '6.8.beta1' into t/18367/move_ntl_wrap_to_sage_library
​97215ae	Rename ntl_wrap -> ntlwrap
​0bd4c02	linbox needs ntl
​5ff2d6d	Merge commit '0bd4c02e112fb242060fd112e7f36a17c36a80e8' into t/17854/ticket/17854

[jdemeyer]

Merged latest versions of dependencies, now that they have positive_review.

[fbissey]

OK I was a tiny bit too late with my comment in #18367. Anyway, it is now definitely all good to go. I want to see that stuff in 6.8.beta3, it is ready for the bots.