[New-bugs-announce] [issue1418] Python/hypot.c is never used
Mark Dickinson
report at bugs.python.org
Sat Nov 10 16:07:51 CET 2007
New submission from Mark Dickinson:
With the current ./configure setup, it looks to me as though there are
no circumstances under which the file Python/hypot.c is compliled.
There's a line
AC_REPLACE_FUNCS(hypot)
in configure.in; which is supposed (if I understand correctly) to check
for a system hypot(), and use the replacement file hypot.c if the system
hypot() isn't found; but the mechanism for using the replacement file
seems not to work: I tried the following:
(1) replace all occurrences of hypot with myhypot in configure.in,
pyport.h, complexobject.c, mathmodule.c and cmathmodule.c.
(2) move Python/hypot.c to Python/myhypot.c, and rename the function
contained within from hypot to myhypot
(3) rerun autoconf and autoheader
(4) ./configure && make
The result: as expected, during configuration I got:
checking for myhypot... no
but building failed with:
ar cr libpython2.6.a Objects/abstract.o Objects/boolobject.o Objects/
bufferobject.o Objects/cellobject.o Objects/classobject.o Objects/
cobject.o Objects/codeobject.o Objects/complexobject.o Objects/
descrobject.o Objects/enumobject.o Objects/exceptions.o Objects/
genobject.o Objects/fileobject.o Objects/floatobject.o Objects/
frameobject.o Objects/funcobject.o Objects/intobject.o Objects/
iterobject.o Objects/listobject.o Objects/longobject.o Objects/
dictobject.o Objects/methodobject.o Objects/moduleobject.o Objects/
object.o Objects/obmalloc.o Objects/rangeobject.o Objects/setobject.o
Objects/sliceobject.o Objects/stringobject.o Objects/structseq.o
Objects/tupleobject.o Objects/typeobject.o Objects/weakrefobject.o
Objects/unicodeobject.o Objects/unicodectype.o
ar cr libpython2.6.a Python/Python-ast.o Python/asdl.o Python/ast.o
Python/bltinmodule.o Python/ceval.o Python/compile.o Python/codecs.o
Python/errors.o Python/frozen.o Python/frozenmain.o Python/future.o
Python/getargs.o Python/getcompiler.o Python/getcopyright.o Python/
getmtime.o Python/getplatform.o Python/getversion.o Python/graminit.o
Python/import.o Python/importdl.o Python/marshal.o Python/modsupport.o
Python/mystrtoul.o Python/mysnprintf.o Python/peephole.o Python/
pyarena.o Python/pyfpe.o Python/pystate.o Python/pythonrun.o Python/
structmember.o Python/symtable.o Python/sysmodule.o Python/traceback.o
Python/getopt.o Python/pystrtod.o Python/dynload_shlib.o Python/
mactoolboxglue.o Python/thread.o
ar cr libpython2.6.a Modules/config.o Modules/getpath.o Modules/main.o
Modules/gcmodule.o
ar cr libpython2.6.a Modules/threadmodule.o Modules/signalmodule.o
Modules/posixmodule.o Modules/errnomodule.o Modules/pwdmodule.o
Modules/_sre.o Modules/_codecsmodule.o Modules/zipimport.o Modules/
symtablemodule.o Modules/xxsubtype.o
ranlib libpython2.6.a
gcc -L/opt/local/lib -u _PyMac_Error -o python.exe \
Modules/python.o \
libpython2.6.a -ldl
/usr/bin/ld: Undefined symbols:
_myhypot
(I'd like to know how to fix this: I've been working on fixing some of
the numerical problems in the cmath module, and hoped to imitate the
hypot setup for the functions log1p, asinh and copysign.)
----------
components: Build
messages: 57350
nosy: marketdickinson
severity: minor
status: open
title: Python/hypot.c is never used
versions: Python 2.5, Python 2.6
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Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1418>
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