And proceeding started like this - it let giac untouched:


















*~/bin/sage-9.2> make giac && make make build/make/Makefile --stop make[1]: 
Verzeichnis „/home/tobias/bin/sage-9.2“ wird betreten make[1]: 
„build/make/Makefile“ ist bereits aktuell. make[1]: Verzeichnis 
„/home/tobias/bin/sage-9.2“ wird verlassen build/bin/sage-logger \ 
       "cd build/make && ./install 'giac'" logs/install.log make[1]: 
Verzeichnis „/home/tobias/bin/sage-9.2/build/make“ wird betreten make[1]: 
Verzeichnis „/home/tobias/bin/sage-9.2/build/make“ wird verlassen Nothing 
to (re)build / all up-to-date. make build/make/Makefile --stop make[1]: 
Verzeichnis „/home/tobias/bin/sage-9.2“ wird betreten make[1]: 
„build/make/Makefile“ ist bereits aktuell. make[1]: Verzeichnis 
„/home/tobias/bin/sage-9.2“ wird verlassen build/bin/sage-logger \ 
       "cd build/make && ./install 'base-toolchain'" logs/install.log 
make[1]: Verzeichnis „/home/tobias/bin/sage-9.2/build/make“ wird betreten 
make[1]: Verzeichnis „/home/tobias/bin/sage-9.2/build/make“ wird verlassen 
*** ALL ENVIRONMENT VARIABLES BEFORE BUILD: ****



Tobias Weiss schrieb am Samstag, 28. November 2020 um 21:31:27 UTC+1:

> OK, I have three directories:
>
> ~/bin/sage-9.2/: Here I started with ./configure, make and did now proceed 
> with "make giac && make"
> ~/bin/sage-9.2-v2/: Here started the same, but with glibc-static-devel 
> installed which made no difference
> ~/bin/sage-9.3-v3/: Here I started with ./configure, "make giac && make"
>
> when I proceeded in ~/bin/sage-9.2/ with "make giac && make" sagelib gave 
> different error - see also log file
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> *[sagelib-9.2] In file included from 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/L.h:537, [sagelib-9.2] 
>                  from build/cythonized/sage/libs/lcalc/lcalc_sage.h:1, 
> [sagelib-9.2]                  from 
> build/cythonized/sage/libs/lcalc/lcalc_Lfunction.cpp:675: [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lvalue.h: In member 
> function ‘Complex L_function<ttype>::value_via_Riemann_sum(Complex, const 
> char*) [with ttype = std::complex<double>]’: [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lvalue.h:271:29: warning: 
> ‘local_average’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]   271 | 
>         }while(local_average>max_integrand*tolerance_sqrd); [sagelib-9.2] 
>       |                ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
> [sagelib-9.2] /home/tobias/bin/sage-9.2/local/include/Lfunction/Lvalue.h: 
> In member function ‘Complex 
> L_function<ttype>::value_via_Riemann_sum(Complex, const char*) [with ttype 
> = int]’: [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lvalue.h:271:29: warning: 
> ‘local_average’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]   271 | 
>         }while(local_average>max_integrand*tolerance_sqrd); [sagelib-9.2] 
>       |                ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
> [sagelib-9.2] /home/tobias/bin/sage-9.2/local/include/Lfunction/Lvalue.h: 
> In member function ‘Complex 
> L_function<ttype>::value_via_Riemann_sum(Complex, const char*) [with ttype 
> = double]’: [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lvalue.h:271:29: warning: 
> ‘local_average’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]   271 | 
>         }while(local_average>max_integrand*tolerance_sqrd); [sagelib-9.2] 
>       |                ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
> [sagelib-9.2] In file included from 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/L.h:538, [sagelib-9.2] 
>                  from build/cythonized/sage/libs/lcalc/lcalc_sage.h:1, 
> [sagelib-9.2]                  from 
> build/cythonized/sage/libs/lcalc/lcalc_Lfunction.cpp:675: [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h: In member 
> function ‘void L_function<ttype>::find_zeros_via_N_v(Long, bool, Double, 
> int, bool, std::vector<double>&) [with ttype = std::complex<double>]’: 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1281:55: 
> warning: ‘u3’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1281 | 
>                                 tmp3=-zeros_zoom_brent(y2_c,x3_c,-v2,-u3); 
> [sagelib-9.2]       | 
>                                       ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1281:55: 
> warning: ‘x3_c’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1307:54: 
> warning: ‘x3’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1307 | 
>                                 tmp2=zeros_zoom_brent(x3,y2,u3,v2); 
> [sagelib-9.2]       | 
>                                      ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1248:56: 
> warning: ‘tmp3’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1248 | 
>                                         zeros_S[i+1][0]=tmp3; [sagelib-9.2] 
>       |                                         ~~~~~~~~~~~~~~~^~~~~ 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1231:58: 
> warning: ‘tmp2’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1231 | 
>                                         
> if(sn(x2)!=sn(y2)&&tmp2>tmp3){tmp4=tmp2;tmp2=tmp3;tmp3=tmp4;} 
> [sagelib-9.2]       | 
>                                            ~~~~~~~~~~~~~~^~~~~~~~~~~ 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h: In member 
> function ‘void L_function<ttype>::find_zeros_via_N_v(Long, bool, Double, 
> int, bool, std::vector<double>&) [with ttype = int]’: [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1281:55: 
> warning: ‘u3’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1281 | 
>                                 tmp3=-zeros_zoom_brent(y2_c,x3_c,-v2,-u3); 
> [sagelib-9.2]       | 
>                                       ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1281:55: 
> warning: ‘x3_c’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1307:54: 
> warning: ‘x3’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1307 | 
>                                 tmp2=zeros_zoom_brent(x3,y2,u3,v2); 
> [sagelib-9.2]       | 
>                                      ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1248:56: 
> warning: ‘tmp3’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1248 | 
>                                         zeros_S[i+1][0]=tmp3; [sagelib-9.2] 
>       |                                         ~~~~~~~~~~~~~~~^~~~~ 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1231:58: 
> warning: ‘tmp2’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1231 | 
>                                         
> if(sn(x2)!=sn(y2)&&tmp2>tmp3){tmp4=tmp2;tmp2=tmp3;tmp3=tmp4;} 
> [sagelib-9.2]       | 
>                                            ~~~~~~~~~~~~~~^~~~~~~~~~~ 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h: In member 
> function ‘void L_function<ttype>::find_zeros_via_N_v(Long, bool, Double, 
> int, bool, std::vector<double>&) [with ttype = double]’: [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1281:55: 
> warning: ‘u3’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1281 | 
>                                 tmp3=-zeros_zoom_brent(y2_c,x3_c,-v2,-u3); 
> [sagelib-9.2]       | 
>                                       ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1281:55: 
> warning: ‘x3_c’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1307:54: 
> warning: ‘x3’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1307 | 
>                                 tmp2=zeros_zoom_brent(x3,y2,u3,v2); 
> [sagelib-9.2]       | 
>                                      ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1248:56: 
> warning: ‘tmp3’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1248 | 
>                                         zeros_S[i+1][0]=tmp3; [sagelib-9.2] 
>       |                                         ~~~~~~~~~~~~~~~^~~~~ 
> [sagelib-9.2] 
> /home/tobias/bin/sage-9.2/local/include/Lfunction/Lfind_zeros.h:1231:58: 
> warning: ‘tmp2’ may be used uninitialized in this function 
> [-Wmaybe-uninitialized] [sagelib-9.2]  1231 | 
>                                         
> if(sn(x2)!=sn(y2)&&tmp2>tmp3){tmp4=tmp2;tmp2=tmp3;tmp3=tmp4;} 
> [sagelib-9.2]       | 
>                                            ~~~~~~~~~~~~~~^~~~~~~~~~~ 
> [sagelib-9.2] cc1plus: some warnings being treated as errors *
>
> *[sagelib-9.2] error: command 'gcc' failed with exit status 1 *
>
>
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> *[sagelib-9.2] Exception ignored in: <function Pool.__del__ at 
> 0x7f9757af8430> [sagelib-9.2] Traceback (most recent call last): 
> [sagelib-9.2]   File "/usr/lib64/python3.8/multiprocessing/pool.py", line 
> 268, in __del__ [sagelib-9.2]     self._change_notifier.put(None) 
> [sagelib-9.2]   File "/usr/lib64/python3.8/multiprocessing/queues.py", line 
> 368, in put [sagelib-9.2]     self._writer.send_bytes(obj) [sagelib-9.2] 
>   File "/usr/lib64/python3.8/multiprocessing/connection.py", line 200, in 
> send_bytes [sagelib-9.2]     self._send_bytes(m[offset:offset + size]) 
> [sagelib-9.2]   File "/usr/lib64/python3.8/multiprocessing/connection.py", 
> line 411, in _send_bytes [sagelib-9.2]     self._send(header + buf) 
> [sagelib-9.2]   File "/usr/lib64/python3.8/multiprocessing/connection.py", 
> line 368, in _send [sagelib-9.2]     n = write(self._handle, buf) 
> [sagelib-9.2] OSError: [Errno 9] Bad file descriptor [sagelib-9.2] 
>  [sagelib-9.2] real      1m8,431s [sagelib-9.2] user      0m21,655s 
> [sagelib-9.2] sys       0m2,284s *
>
>
>
>
>
> *make[4]: *** [Makefile:2163: sagelib-no-deps] Fehler 1 make[3]: *** 
> [Makefile:2163: 
> /home/tobias/bin/sage-9.2/local/var/lib/sage/installed/sagelib-9.2] Fehler 
> 2 make[2]: *** [Makefile:1766: all-start] Fehler 2 make[2]: Verzeichnis 
> „/home/tobias/bin/sage-9.2/build/make“ wird verlassen *
>
>
>
>
>
> *real    1m9,181s user    0m22,030s sys     0m2,368s 
> *************************************************************** Error 
> building Sage. *
>
> Tobias
> dim...@gmail.com schrieb am Samstag, 28. November 2020 um 21:15:18 UTC+1:
>
>>
>>
>> On Sat, 28 Nov 2020, 19:41 Tobias Weiss, <tobwe...@web.de> wrote:
>>
>>> I understand: I start a new compilation with "make giac && make". It 
>>> starts with readline and does pari now very early.
>>>
>>
>> no, not a new one.
>> Normally one can (and should) proceed at the point it stopped.
>>
>>
>>> Tobias Weiss schrieb am Samstag, 28. November 2020 um 20:31:13 UTC+1:
>>>
>>>> In what directory I should do "make giac && make" ?
>>>>
>>>> Tobias Weiss schrieb am Samstag, 28. November 2020 um 20:29:11 UTC+1:
>>>>
>>>>> Here the top-level config.log. Giac was compiled without problems 
>>>>> bevor sagelib. I give you the install logs of both. Installing the 
>>>>> static-devel of glibc didn't help.
>>>>>
>>>>> Matthias Koeppe schrieb am Samstag, 28. November 2020 um 19:47:27 
>>>>> UTC+1:
>>>>>
>>>>>> The actual error is likely further up. This problem could just be the 
>>>>>> missing dependency of sagelib on giac, already fixed in 
>>>>>> https://trac.sagemath.org/ticket/30858
>>>>>> Try compiling the latest development version,
>>>>>> or do "make giac && make" to work around the problem
>>>>>>
>>>>>> On Saturday, November 28, 2020 at 9:32:26 AM UTC-8 tobwe...@web.de 
>>>>>> wrote:
>>>>>>
>>>>>>> Because the last g++ command is something with stl vector: Do I need 
>>>>>>> the glibc-static-devel? I only have glibc-devel installed.
>>>>>>>
>>>>>>> Tobias
>>>>>>>
>>>>>>>
>>>>>>> Tobias Weiss schrieb am Samstag, 28. November 2020 um 16:25:24 UTC+1:
>>>>>>>
>>>>>>>> Hello Everybody,
>>>>>>>>
>>>>>>>> now the second post to the problem. I try to make sage 9.2 on 
>>>>>>>> Opensuse Tumbleweed. The compilation stopped with last step of 
>>>>>>>> sagelib. If 
>>>>>>>> I don't take system packages, the error don't occurs.
>>>>>>>> (see thread https://groups.google.com/g/sage-support/c/AJRosgRDrsE)
>>>>>>>>
>>>>>>>> Pari was take from tarball this times. The output of make ends with:
>>>>>>>>
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>>>>>>>> *[sagelib-9.2] [296/297] creating 
>>>>>>>> build/temp.linux-x86_64-3.8/build/cythonized/sage/tests [sagelib-9.2] 
>>>>>>>> gcc 
>>>>>>>> -Wno-unused-result -Wsign-compare -DNDEBUG -O2 -Wall 
>>>>>>>> -D_FORTIFY_SOURCE=2 
>>>>>>>> -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables 
>>>>>>>> -fstack-clash-protection -Werror=return-type -g -DOPENSSL_LOAD_CONF 
>>>>>>>> -fwrapv 
>>>>>>>> -fno-semantic-interposition -O2 -Wall -D_FORTIFY_SOURCE=2 
>>>>>>>> -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables 
>>>>>>>> -fstack-clash-protection -Werror=return-type -g -O2 -Wall 
>>>>>>>> -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables 
>>>>>>>> -fasynchronous-unwind-tables -fstack-clash-protection 
>>>>>>>> -Werror=return-type 
>>>>>>>> -g -fPIC -I/home/tobias/bin/sage-9.2/build/pkgs/sagelib/src 
>>>>>>>> -I/home/tobias/bin/sage-9.2/build/pkgs/sagelib/src/sage/ext 
>>>>>>>> -I/usr/include/python3.8 
>>>>>>>> -I/home/tobias/bin/sage-9.2/local/lib64/python3.8/site-packages/numpy/core/include
>>>>>>>>  
>>>>>>>> -Ibuild/cythonized -I/home/tobias/bin/sage-9.2/local/include 
>>>>>>>> -I/usr/include/python3.8 -c build/cythonized/sage/tests/cython.c -o 
>>>>>>>> build/temp.linux-x86_64-3.8/build/cythonized/sage/tests/cython.o 
>>>>>>>> -fno-strict-aliasing -DCYTHON_CLINE_IN_TRACEBACK=1 -std=c99 
>>>>>>>> [sagelib-9.2] 
>>>>>>>> gcc -pthread -shared 
>>>>>>>> -Wl,-rpath-link,/home/tobias/bin/sage-9.2/local/lib 
>>>>>>>> -L/home/tobias/bin/sage-9.2/local/lib 
>>>>>>>> -Wl,-rpath,/home/tobias/bin/sage-9.2/local/lib 
>>>>>>>> build/temp.linux-x86_64-3.8/build/cythonized/sage/tests/cython.o 
>>>>>>>> -L/usr/lib64 -o 
>>>>>>>> build/lib.linux-x86_64-3.8/sage/tests/cython.cpython-38-x86_64-linux-gnu.so
>>>>>>>>  
>>>>>>>> <http://cython.cpython-38-x86_64-linux-gnu.so> [sagelib-9.2] [297/297] 
>>>>>>>> gcc 
>>>>>>>> -Wno-unused-result -Wsign-compare -DNDEBUG -O2 -Wall 
>>>>>>>> -D_FORTIFY_SOURCE=2 
>>>>>>>> -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables 
>>>>>>>> -fstack-clash-protection -Werror=return-type -g -DOPENSSL_LOAD_CONF 
>>>>>>>> -fwrapv 
>>>>>>>> -fno-semantic-interposition -O2 -Wall -D_FORTIFY_SOURCE=2 
>>>>>>>> -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables 
>>>>>>>> -fstack-clash-protection -Werror=return-type -g -O2 -Wall 
>>>>>>>> -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables 
>>>>>>>> -fasynchronous-unwind-tables -fstack-clash-protection 
>>>>>>>> -Werror=return-type 
>>>>>>>> -g -fPIC 
>>>>>>>> -I/home/tobias/bin/sage-9.2/local/lib64/python3.8/site-packages/cysignals
>>>>>>>>  
>>>>>>>> -I./sage/cpython -Isage/cpython 
>>>>>>>> -I/home/tobias/bin/sage-9.2/build/pkgs/sagelib/src 
>>>>>>>> -I/home/tobias/bin/sage-9.2/build/pkgs/sagelib/src/sage/ext 
>>>>>>>> -I/usr/include/python3.8 
>>>>>>>> -I/home/tobias/bin/sage-9.2/local/lib64/python3.8/site-packages/numpy/core/include
>>>>>>>>  
>>>>>>>> -Ibuild/cythonized -I/home/tobias/bin/sage-9.2/local/include 
>>>>>>>> -I/usr/include/python3.8 -c build/cythonized/sage/tests/stl_vector.cpp 
>>>>>>>> -o 
>>>>>>>> build/temp.linux-x86_64-3.8/build/cythonized/sage/tests/stl_vector.o 
>>>>>>>> -fno-strict-aliasing -DCYTHON_CLINE_IN_TRACEBACK=1 -std=c++11 
>>>>>>>> [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp: In function ‘PyObject* 
>>>>>>>> __pyx_pf_4sage_5tests_10stl_vector_14stl_int_vector_4__getitem__(__pyx_obj_4sage_5tests_10stl_vector_stl_int_vector*,
>>>>>>>>  
>>>>>>>> int)’: [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp:2940:30: 
>>>>>>>> warning: comparison of integer expressions of different signedness: 
>>>>>>>> ‘int’ 
>>>>>>>> and ‘std::vector<int>::size_type’ {aka ‘long unsigned int’} 
>>>>>>>> [-Wsign-compare] [sagelib-9.2]  2940 |       __pyx_t_1 = (__pyx_v_i < 
>>>>>>>> __pyx_v_self->data->size()); [sagelib-9.2]       | 
>>>>>>>>                    ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp: At global scope: 
>>>>>>>> [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp:5744:18: warning: 
>>>>>>>> ‘PyObject* 
>>>>>>>> __pyx_pw_4sage_7cpython_6string_3str_to_bytes(PyObject*, PyObject*, 
>>>>>>>> PyObject*)’ defined but not used [-Wunused-function] [sagelib-9.2]  
>>>>>>>> 5744 | 
>>>>>>>> static PyObject 
>>>>>>>> *__pyx_pw_4sage_7cpython_6string_3str_to_bytes(PyObject 
>>>>>>>> *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds) { 
>>>>>>>> [sagelib-9.2] 
>>>>>>>>       |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] build/cythonized/sage/tests/stl_vector.cpp:5743:13: 
>>>>>>>> warning: 
>>>>>>>> ‘__pyx_doc_4sage_7cpython_6string_2str_to_bytes’ defined but not used 
>>>>>>>> [-Wunused-variable] [sagelib-9.2]  5743 | static char 
>>>>>>>> __pyx_doc_4sage_7cpython_6string_2str_to_bytes[] = "str_to_bytes(s, 
>>>>>>>> encoding=None, errors=None) -> bytes\nFile: sage/cpython/string.pxd 
>>>>>>>> (starting at line 55)\n\n    Convert ``str`` or ``unicode`` to 
>>>>>>>> ``bytes``.\n\n    It encodes the given ``str`` to a Python 3 
>>>>>>>> ``bytes``\n 
>>>>>>>>    using the specified encoding.  It is a no-op on ``bytes`` 
>>>>>>>> input.\n\n 
>>>>>>>>    EXAMPLES::\n\n        sage: from sage.cpython.string import 
>>>>>>>> str_to_bytes\n        sage: bs = [str_to_bytes(u'\317\200')]\n        
>>>>>>>> sage: 
>>>>>>>> all(b == b'\\xcf\\x80' for b in bs)\n        True\n        sage: 
>>>>>>>> str_to_bytes([])\n        Traceback (most recent call last):\n        
>>>>>>>> ...\n 
>>>>>>>>        TypeError: expected str... list found\n    "; [sagelib-9.2]     
>>>>>>>>   | 
>>>>>>>>             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp:5539:18: warning: 
>>>>>>>> ‘PyObject* 
>>>>>>>> __pyx_pw_4sage_7cpython_6string_1bytes_to_str(PyObject*, PyObject*, 
>>>>>>>> PyObject*)’ defined but not used [-Wunused-function] [sagelib-9.2]  
>>>>>>>> 5539 | 
>>>>>>>> static PyObject 
>>>>>>>> *__pyx_pw_4sage_7cpython_6string_1bytes_to_str(PyObject 
>>>>>>>> *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds) { 
>>>>>>>> [sagelib-9.2] 
>>>>>>>>       |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] build/cythonized/sage/tests/stl_vector.cpp:5538:13: 
>>>>>>>> warning: 
>>>>>>>> ‘__pyx_doc_4sage_7cpython_6string_bytes_to_str’ defined but not used 
>>>>>>>> [-Wunused-variable] [sagelib-9.2]  5538 | static char 
>>>>>>>> __pyx_doc_4sage_7cpython_6string_bytes_to_str[] = "bytes_to_str(b, 
>>>>>>>> encoding=None, errors=None) -> str\nFile: sage/cpython/string.pxd 
>>>>>>>> (starting 
>>>>>>>> at line 29)\n\n    Convert ``bytes`` to ``str``.\n\n    This decodes 
>>>>>>>> the 
>>>>>>>> given ``bytes`` to a Python 3 unicode ``str`` using\n    the specified 
>>>>>>>> encoding.  It is a no-op on ``str`` input.\n\n    EXAMPLES::\n\n 
>>>>>>>>        sage: from sage.cpython.string import bytes_to_str\n        
>>>>>>>> sage: s 
>>>>>>>> = bytes_to_str(b'\\xcf\\x80')\n        sage: s == u'\317\200'\n 
>>>>>>>>        True\n        sage: bytes_to_str([])\n        Traceback (most 
>>>>>>>> recent 
>>>>>>>> call last):\n        ...\n        TypeError: expected bytes, list 
>>>>>>>> found\n 
>>>>>>>>    "; [sagelib-9.2]       | 
>>>>>>>>             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp:5259:18: warning: 
>>>>>>>> ‘PyObject* 
>>>>>>>> __pyx_pw_4sage_9structure_7richcmp_9revop(PyObject*, PyObject*)’ 
>>>>>>>> defined 
>>>>>>>> but not used [-Wunused-function] [sagelib-9.2]  5259 | static PyObject 
>>>>>>>> *__pyx_pw_4sage_9structure_7richcmp_9revop(PyObject *__pyx_self, 
>>>>>>>> PyObject 
>>>>>>>> *__pyx_arg_op) { [sagelib-9.2]       | 
>>>>>>>>                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp:5258:13: warning: 
>>>>>>>> ‘__pyx_doc_4sage_9structure_7richcmp_8revop’ defined but not used 
>>>>>>>> [-Wunused-variable] [sagelib-9.2]  5258 | static char 
>>>>>>>> __pyx_doc_4sage_9structure_7richcmp_8revop[] = "revop(int op) -> 
>>>>>>>> int\nFile: 
>>>>>>>> sage/structure/richcmp.pxd (starting at line 199)\n\n    Return the 
>>>>>>>> reverse 
>>>>>>>> operation of ``op``.\n\n    For example, <= becomes >=, etc.\n\n 
>>>>>>>>    EXAMPLES::\n\n        sage: from sage.structure.richcmp import 
>>>>>>>> revop\n 
>>>>>>>>        sage: [revop(i) for i in range(6)]\n        [4, 5, 2, 3, 0, 
>>>>>>>> 1]\n 
>>>>>>>>    "; [sagelib-9.2]       | 
>>>>>>>>             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp:5132:18: warning: 
>>>>>>>> ‘PyObject* 
>>>>>>>> __pyx_pw_4sage_9structure_7richcmp_7rich_to_bool_sgn(PyObject*, 
>>>>>>>> PyObject*, 
>>>>>>>> PyObject*)’ defined but not used [-Wunused-function] [sagelib-9.2]  
>>>>>>>> 5132 | 
>>>>>>>> static PyObject 
>>>>>>>> *__pyx_pw_4sage_9structure_7richcmp_7rich_to_bool_sgn(PyObject 
>>>>>>>> *__pyx_self, 
>>>>>>>> PyObject *__pyx_args, PyObject *__pyx_kwds) { [sagelib-9.2]       | 
>>>>>>>>                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] build/cythonized/sage/tests/stl_vector.cpp:5131:13: 
>>>>>>>> warning: 
>>>>>>>> ‘__pyx_doc_4sage_9structure_7richcmp_6rich_to_bool_sgn’ defined but 
>>>>>>>> not 
>>>>>>>> used [-Wunused-variable] [sagelib-9.2]  5131 | static char 
>>>>>>>> __pyx_doc_4sage_9structure_7richcmp_6rich_to_bool_sgn[] = 
>>>>>>>> "rich_to_bool_sgn(int op, Py_ssize_t c) -> bool\nFile: 
>>>>>>>> sage/structure/richcmp.pxd (starting at line 187)\n\n    Same as 
>>>>>>>> ``rich_to_bool``, but allow any `c < 0` and `c > 0`\n    instead of 
>>>>>>>> only 
>>>>>>>> `-1` and `1`.\n\n    .. NOTE::\n\n        This is in particular needed 
>>>>>>>> for 
>>>>>>>> ``mpz_cmp()``.\n    "; [sagelib-9.2]       | 
>>>>>>>>             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] build/cythonized/sage/tests/stl_vector.cpp:5003:18: 
>>>>>>>> warning: 
>>>>>>>> ‘PyObject* __pyx_pw_4sage_9structure_7richcmp_5rich_to_bool(PyObject*, 
>>>>>>>> PyObject*, PyObject*)’ defined but not used [-Wunused-function] 
>>>>>>>> [sagelib-9.2]  5003 | static PyObject 
>>>>>>>> *__pyx_pw_4sage_9structure_7richcmp_5rich_to_bool(PyObject 
>>>>>>>> *__pyx_self, 
>>>>>>>> PyObject *__pyx_args, PyObject *__pyx_kwds) { [sagelib-9.2]       | 
>>>>>>>>                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] build/cythonized/sage/tests/stl_vector.cpp:5002:13: 
>>>>>>>> warning: 
>>>>>>>> ‘__pyx_doc_4sage_9structure_7richcmp_4rich_to_bool’ defined but not 
>>>>>>>> used 
>>>>>>>> [-Wunused-variable] [sagelib-9.2]  5002 | static char 
>>>>>>>> __pyx_doc_4sage_9structure_7richcmp_4rich_to_bool[] = 
>>>>>>>> "rich_to_bool(int op, 
>>>>>>>> int c) -> bool\nFile: sage/structure/richcmp.pxd (starting at line 
>>>>>>>> 120)\n\n 
>>>>>>>>    Return the corresponding ``True`` or ``False`` value for a rich\n 
>>>>>>>>    comparison, given the result of an old-style comparison.\n\n 
>>>>>>>>    INPUT:\n\n    - ``op`` -- a rich comparison operation (e.g. 
>>>>>>>> ``Py_EQ``)\n\n    - ``c`` -- the result of an old-style comparison: 
>>>>>>>> -1, 0 
>>>>>>>> or 1.\n\n    OUTPUT: 1 or 0 (corresponding to ``True`` and 
>>>>>>>> ``False``)\n\n 
>>>>>>>>    .. SEEALSO::\n\n        :func:`rich_to_bool_sgn` if ``c`` could be 
>>>>>>>> outside the\n        [-1, 0, 1] range.\n\n    EXAMPLES::\n\n        
>>>>>>>> sage: 
>>>>>>>> from sage.structure.richcmp import (rich_to_bool,\n        ....:    
>>>>>>>> op_EQ, 
>>>>>>>> op_NE, op_LT, op_LE, op_GT, op_GE)\n        sage: for op in (op_LT, 
>>>>>>>> op_LE, 
>>>>>>>> op_EQ, op_NE, op_GT, op_GE):\n        ....:     for c in (-1,0,1):\n   
>>>>>>>>   
>>>>>>>>    ....:         print(rich_to_bool(op, c))\n        True False 
>>>>>>>> False\n 
>>>>>>>>        True True False\n        False True False\n        True False 
>>>>>>>> True\n 
>>>>>>>>        False False True\n        False True True\n\n    Indirect tests 
>>>>>>>> using integers::\n\n        sage: 0 < 5, 5 < 5, 5 < -8\n        (True, 
>>>>>>>> False, False)\n        sage: 0 <= 5, 5 <= 5, 5 <= -8\n        (True, 
>>>>>>>> True, 
>>>>>>>> False)\n        sage: 0 >= 5, 5 >= 5, 5 >= -8\n        (False, True, 
>>>>>>>> True)\n        sage: 0 > 5, 5 > 5, 5 > -8\n        (False, False, 
>>>>>>>> True)\n 
>>>>>>>>        sage: 0 == 5, 5 == 5, 5 == -8\n        (False, True, False)\n 
>>>>>>>>        sage: 0 != 5, 5 != 5, 5 != -8\n        (True, False, True)\n    
>>>>>>>> "; 
>>>>>>>> [sagelib-9.2]       | 
>>>>>>>>             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp:4813:18: warning: 
>>>>>>>> ‘PyObject* 
>>>>>>>> __pyx_pw_4sage_9structure_7richcmp_3richcmp_not_equal(PyObject*, 
>>>>>>>> PyObject*, 
>>>>>>>> PyObject*)’ defined but not used [-Wunused-function] [sagelib-9.2]  
>>>>>>>> 4813 | 
>>>>>>>> static PyObject 
>>>>>>>> *__pyx_pw_4sage_9structure_7richcmp_3richcmp_not_equal(PyObject 
>>>>>>>> *__pyx_self, PyObject *__pyx_args, PyObject *__pyx_kwds) { 
>>>>>>>> [sagelib-9.2] 
>>>>>>>>       | 
>>>>>>>>                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] build/cythonized/sage/tests/stl_vector.cpp:4812:13: 
>>>>>>>> warning: 
>>>>>>>> ‘__pyx_doc_4sage_9structure_7richcmp_2richcmp_not_equal’ defined but 
>>>>>>>> not 
>>>>>>>> used [-Wunused-variable] [sagelib-9.2]  4812 | static char 
>>>>>>>> __pyx_doc_4sage_9structure_7richcmp_2richcmp_not_equal[] = 
>>>>>>>> "richcmp_not_equal(x, y, int op)\nFile: sage/structure/richcmp.pxd 
>>>>>>>> (starting at line 56)\n\n    Like ``richcmp(x, y, op)`` but assuming 
>>>>>>>> that 
>>>>>>>> `x` is not equal to `y`.\n\n    INPUT:\n\n    - ``op`` -- a rich 
>>>>>>>> comparison 
>>>>>>>> operation (e.g. ``Py_EQ``)\n\n    OUTPUT:\n\n    If ``op`` is not 
>>>>>>>> ``op_EQ`` 
>>>>>>>> or ``op_NE``, the result of\n    ``richcmp(x, y, op)``. If ``op`` is 
>>>>>>>> ``op_EQ``, return\n    ``False``. If ``op`` is ``op_NE``, return 
>>>>>>>> ``True``.\n\n    This is useful to compare lazily two objects A and B 
>>>>>>>> according to 2\n    (or more) different parameters, say width and 
>>>>>>>> height 
>>>>>>>> for example.\n    One could use::\n\n        return 
>>>>>>>> richcmp((A.width(), 
>>>>>>>> A.height()), (B.width(), B.height()), op)\n\n    but this will compute 
>>>>>>>> both 
>>>>>>>> width and height in all cases, even if\n    A.width() and B.width() 
>>>>>>>> are 
>>>>>>>> enough to decide the comparison.\n\n    Instead one can do::\n\n       
>>>>>>>>  wA 
>>>>>>>> = A.width()\n        wB = B.width()\n        if wA != wB:\n 
>>>>>>>>            return richcmp_not_equal(wA, wB, op)\n        return 
>>>>>>>> richcmp(A.height(), B.height(), op)\n\n    The difference with 
>>>>>>>> ``richcmp`` 
>>>>>>>> is that ``richcmp_not_equal``\n    assumes that its arguments are not 
>>>>>>>> equal, which is excluding the case\n    where the comparison cannot be 
>>>>>>>> decided so far, without\n    knowing the rest of the parameters.\n\n 
>>>>>>>>    EXAMPLES::\n\n        sage: from sage.structure.richcmp import 
>>>>>>>> (richcmp_not_equal,\n        ....:    op_EQ, op_NE, op_LT, op_LE, 
>>>>>>>> op_GT, 
>>>>>>>> op_GE)\n        sage: for op in (op_LT, op_LE, op_EQ, op_NE, op_GT, 
>>>>>>>> op_GE):\n        ....:     print(richcmp_not_equal(3, 4, op))\n 
>>>>>>>>        True\n        True\n        False\n        True\n        
>>>>>>>> False\n 
>>>>>>>>        False\n        sage: for op in (op_LT, op_LE, op_EQ, op_NE, 
>>>>>>>> op_GT, 
>>>>>>>> op_GE):\n        ....:     print(richcmp_not_equal(5, 4, op))\n 
>>>>>>>>        False\n        False\n        False\n        True\n        
>>>>>>>> True\n 
>>>>>>>>        True\n    "; [sagelib-9.2]       | 
>>>>>>>>             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] build/cythonized/sage/tests/stl_vector.cpp:4597:18: 
>>>>>>>> warning: 
>>>>>>>> ‘PyObject* __pyx_pw_4sage_9structure_7richcmp_1richcmp(PyObject*, 
>>>>>>>> PyObject*, PyObject*)’ defined but not used [-Wunused-function] 
>>>>>>>> [sagelib-9.2]  4597 | static PyObject 
>>>>>>>> *__pyx_pw_4sage_9structure_7richcmp_1richcmp(PyObject *__pyx_self, 
>>>>>>>> PyObject 
>>>>>>>> *__pyx_args, PyObject *__pyx_kwds) { [sagelib-9.2]       | 
>>>>>>>>                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp:4596:13: warning: 
>>>>>>>> ‘__pyx_doc_4sage_9structure_7richcmp_richcmp’ defined but not used 
>>>>>>>> [-Wunused-variable] [sagelib-9.2]  4596 | static char 
>>>>>>>> __pyx_doc_4sage_9structure_7richcmp_richcmp[] = "richcmp(x, y, int 
>>>>>>>> op)\nFile: sage/structure/richcmp.pxd (starting at line 6)\n\n    
>>>>>>>> Return 
>>>>>>>> the result of the rich comparison of ``x`` and ``y`` with\n    
>>>>>>>> operator 
>>>>>>>> ``op``.\n\n    INPUT:\n\n    - ``x``, ``y`` -- arbitrary Python 
>>>>>>>> objects\n\n 
>>>>>>>>    - ``op`` -- comparison operator (one of ``op_LT`, ``op_LE``,\n 
>>>>>>>>      ``op_EQ``, ``op_NE``, ``op_GT``, ``op_GE``).\n\n    
>>>>>>>> EXAMPLES::\n\n 
>>>>>>>>        sage: from sage.structure.richcmp import *\n        sage: 
>>>>>>>> richcmp(3, 
>>>>>>>> 4, op_LT)\n        True\n        sage: richcmp(x, x^2, op_EQ)\n        
>>>>>>>> x == 
>>>>>>>> x^2\n\n    The two examples above are completely equivalent to ``3 < 
>>>>>>>> 4``\n 
>>>>>>>>    and ``x == x^2``. For this reason, it only makes sense in 
>>>>>>>> practice\n 
>>>>>>>>    to call ``richcmp`` with a non-constant value for ``op``.\n\n    We 
>>>>>>>> can 
>>>>>>>> write a custom ``Element`` class which shows a more\n    realistic 
>>>>>>>> example 
>>>>>>>> of how to use this::\n\n        sage: from sage.structure.element 
>>>>>>>> import 
>>>>>>>> Element\n        sage: class MyElement(Element):\n        ....:     
>>>>>>>> def 
>>>>>>>> __init__(self, parent, value):\n        ....: 
>>>>>>>>         Element.__init__(self, parent)\n        ....:         self.v = 
>>>>>>>> value\n        ....:     def _richcmp_(self, other, op):\n        
>>>>>>>> ....: 
>>>>>>>>         return richcmp(self.v, other.v, op)\n        sage: P = 
>>>>>>>> Parent()\n 
>>>>>>>>        sage: x = MyElement(P, 3)\n        sage: y = MyElement(P, 3)\n 
>>>>>>>>        sage: x < y\n        False\n        sage: x == y\n        
>>>>>>>> True\n 
>>>>>>>>        sage: x > y\n        False\n    "; [sagelib-9.2]       | 
>>>>>>>>             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp:4383:18: warning: 
>>>>>>>> ‘PyObject* 
>>>>>>>> __pyx_pw_4sage_9structure_7element_3have_same_parent(PyObject*, 
>>>>>>>> PyObject*, 
>>>>>>>> PyObject*)’ defined but not used [-Wunused-function] [sagelib-9.2]  
>>>>>>>> 4383 | 
>>>>>>>> static PyObject 
>>>>>>>> *__pyx_pw_4sage_9structure_7element_3have_same_parent(PyObject 
>>>>>>>> *__pyx_self, 
>>>>>>>> PyObject *__pyx_args, PyObject *__pyx_kwds) { [sagelib-9.2]       | 
>>>>>>>>                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] build/cythonized/sage/tests/stl_vector.cpp:4382:13: 
>>>>>>>> warning: 
>>>>>>>> ‘__pyx_doc_4sage_9structure_7element_2have_same_parent’ defined but 
>>>>>>>> not 
>>>>>>>> used [-Wunused-variable] [sagelib-9.2]  4382 | static char 
>>>>>>>> __pyx_doc_4sage_9structure_7element_2have_same_parent[] = 
>>>>>>>> "have_same_parent(left, right) -> bool\nFile: 
>>>>>>>> sage/structure/element.pxd 
>>>>>>>> (starting at line 111)\n\n    Return ``True`` if and only if ``left`` 
>>>>>>>> and 
>>>>>>>> ``right`` have the\n    same parent.\n\n    .. WARNING::\n\n        
>>>>>>>> This 
>>>>>>>> function assumes that at least one of the arguments is a\n        Sage 
>>>>>>>> :class:`Element`. When in doubt, use the slower\n        
>>>>>>>> ``parent(left) is 
>>>>>>>> parent(right)`` instead.\n\n    EXAMPLES::\n\n        sage: from 
>>>>>>>> sage.structure.element import have_same_parent\n        sage: 
>>>>>>>> have_same_parent(1, 3)\n        True\n        sage: 
>>>>>>>> have_same_parent(1, 
>>>>>>>> 1/2)\n        False\n        sage: have_same_parent(gap(1), 
>>>>>>>> gap(1/2))\n 
>>>>>>>>        True\n\n    These have different types but the same 
>>>>>>>> parent::\n\n 
>>>>>>>>        sage: a = RLF(2)\n        sage: b = exp(a)\n        sage: 
>>>>>>>> type(a)\n 
>>>>>>>>        <... 'sage.rings.real_lazy.LazyWrapper'>\n        sage: 
>>>>>>>> type(b)\n 
>>>>>>>>        <... 'sage.rings.real_lazy.LazyNamedUnop'>\n        sage: 
>>>>>>>> have_same_parent(a, b)\n        True\n    "; [sagelib-9.2]       | 
>>>>>>>>             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] build/cythonized/sage/tests/stl_vector.cpp:4038:18: 
>>>>>>>> warning: 
>>>>>>>> ‘PyObject* __pyx_pw_4sage_9structure_7element_1parent(PyObject*, 
>>>>>>>> PyObject*)’ defined but not used [-Wunused-function] [sagelib-9.2]  
>>>>>>>> 4038 | 
>>>>>>>> static PyObject *__pyx_pw_4sage_9structure_7element_1parent(PyObject 
>>>>>>>> *__pyx_self, PyObject *__pyx_v_x) { [sagelib-9.2]       | 
>>>>>>>>                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
>>>>>>>> [sagelib-9.2] 
>>>>>>>> build/cythonized/sage/tests/stl_vector.cpp:4037:13: warning: 
>>>>>>>> ‘__pyx_doc_4sage_9structure_7element_parent’ defined but not used 
>>>>>>>> [-Wunused-variable] [sagelib-9.2]  4037 | static char 
>>>>>>>> __pyx_doc_4sage_9structure_7element_parent[] = "parent(x)\nFile: 
>>>>>>>> sage/structure/element.pxd (starting at line 6)\n\n    Return the 
>>>>>>>> parent of 
>>>>>>>> the element ``x``.\n\n    Usually, this means the mathematical object 
>>>>>>>> of 
>>>>>>>> which ``x`` is an\n    element.\n\n    INPUT:\n\n    - ``x`` -- an 
>>>>>>>> element\n\n    OUTPUT:\n\n    - If ``x`` is a Sage :class:`Element`, 
>>>>>>>> return 
>>>>>>>> ``x.parent()``.\n\n    - Otherwise, return ``type(x)``.\n\n    .. 
>>>>>>>> SEEALSO::\n\n        `Parents, Conversion and Coercion 
>>>>>>>> <http://doc.sagemath.org/html/en/tutorial/tour_coercion.html 
>>>>>>>> <http://doc.sagemath.org/html/en/tutorial/tour_coercion.html>>`_\n 
>>>>>>>>        Section in the Sage Tutorial\n\n    EXAMPLES::\n\n        sage: 
>>>>>>>> a = 
>>>>>>>> 42\n        sage: parent(a)\n        Integer Ring\n        sage: b = 
>>>>>>>> 42/1\n 
>>>>>>>>        sage: parent(b)\n        Rational Field\n        sage: c = 
>>>>>>>> 42.0\n 
>>>>>>>>        sage: parent(c)\n        Real Field with 53 bits of 
>>>>>>>> precision\n\n 
>>>>>>>>    Some more complicated examples::\n\n        sage: x = 
>>>>>>>> Partition([3,2,1,1,1])\n        sage: parent(x)\n        Partitions\n 
>>>>>>>>        sage: v = vector(RDF, [1,2,3])\n        sage: parent(v)\n 
>>>>>>>>        Vector space of dimension 3 over Real Double Field\n\n    The 
>>>>>>>> following are not considered to be elements, so the type is\n 
>>>>>>>>    returned::\n\n        sage: d = int(42)  # Python int\n        
>>>>>>>> sage: 
>>>>>>>> parent(d)\n        <... 'int'>\n        sage: L = list(range(10))\n    
>>>>>>>>     
>>>>>>>> sage: parent(L)\n        <... 'list'>\n    "; [sagelib-9.2]       | 
>>>>>>>>             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ [sagelib-9.2] 
>>>>>>>> g++ 
>>>>>>>> -pthread -shared -Wl,-rpath-link,/home/tobias/bin/sage-9.2/local/lib 
>>>>>>>> -L/home/tobias/bin/sage-9.2/local/lib 
>>>>>>>> -Wl,-rpath,/home/tobias/bin/sage-9.2/local/lib 
>>>>>>>> build/temp.linux-x86_64-3.8/build/cythonized/sage/tests/stl_vector.o 
>>>>>>>> -L/usr/lib64 -lgmp -o 
>>>>>>>> build/lib.linux-x86_64-3.8/sage/tests/stl_vector.cpython-38-x86_64-linux-gnu.so
>>>>>>>>  
>>>>>>>> <http://stl_vector.cpython-38-x86_64-linux-gnu.so> -lpari 
>>>>>>>> [sagelib-9.2] 
>>>>>>>> error: command 'gcc' failed with exit status 1 [sagelib-9.2]  
>>>>>>>> [sagelib-9.2] 
>>>>>>>> real      45m29,250s [sagelib-9.2] user      43m28,680s [sagelib-9.2] 
>>>>>>>> sys 
>>>>>>>>       1m14,383s make[4]: *** [Makefile:2163: sagelib-no-deps] Fehler 1 
>>>>>>>> make[3]: *** [Makefile:2163: 
>>>>>>>> /home/tobias/bin/sage-9.2/local/var/lib/sage/installed/sagelib-9.2] 
>>>>>>>> Fehler 
>>>>>>>> 2 make[2]: *** [Makefile:1766: all-start] Fehler 2 make[2]: 
>>>>>>>> Verzeichnis 
>>>>>>>> „/home/tobias/bin/sage-9.2/build/make“ wird verlassen real    
>>>>>>>> 45m37,045s 
>>>>>>>> user    43m33,440s sys     1m16,757s 
>>>>>>>> *************************************************************** Error 
>>>>>>>> building Sage. The following package(s) may have failed to build (not 
>>>>>>>> necessarily during this run of 'make all-start'): It is safe to delete 
>>>>>>>> any 
>>>>>>>> log files and build directories, but they contain information that is 
>>>>>>>> helpful for debugging build problems. WARNING: If you now run 'make' 
>>>>>>>> again, 
>>>>>>>> the build directory of the same version of the package will, by 
>>>>>>>> default, be 
>>>>>>>> deleted. Set the environment variable SAGE_KEEP_BUILT_SPKGS=yes to 
>>>>>>>> prevent 
>>>>>>>> this. make[1]: *** [Makefile:33: all-start] Fehler 1 make[1]: 
>>>>>>>> Verzeichnis 
>>>>>>>> „/home/tobias/bin/sage-9.2“ wird verlassen make: *** [Makefile:13: 
>>>>>>>> all] 
>>>>>>>> Fehler 2*
>>>>>>>>
>>>>>>> -- 
>>>
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>>>
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>>> https://groups.google.com/d/msgid/sage-support/d1b693a0-ca43-4150-90e3-932fc5e97fcan%40googlegroups.com
>>>  
>>> <https://groups.google.com/d/msgid/sage-support/d1b693a0-ca43-4150-90e3-932fc5e97fcan%40googlegroups.com?utm_medium=email&utm_source=footer>
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>>>
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