On Wed, Oct 11, 2000 at 10:25:32AM -0500, Guido van Rossum wrote: > 1.5.2 links with -lieee while 2.0 doesn't. Removing -lieee from the > 1.5.2 link line makes is raise OverflowError too. Adding it to the > 2.0 link line makes it return 0.0 for exp(-1000) and inf for > exp(1000). Ack, that's the one thing I didn't check: link libraries ;-P > Next question: what changed in the configure script, and why? Well, that's easy. Old configure.in: # Linux requires this for correct f.p. operations AC_CHECK_LIB(ieee, __fpu_control) New configure.in: # Linux requires this for correct f.p. operations AC_CHECK_FUNC(__fpu_control, [], [AC_CHECK_LIB(ieee, __fpu_control) ]) I remember the patch that did this, on SF. It was titled "don't link with -lieee if it isn't necessary" or something. Not sure what it would break, but mayhaps declaring -lieee necessary on glibc systems is the right fix ? (For the non-autoconf readers among us: the first snippet writes a test program to see if the function '__fpu_control' exists when linking with -lieee in addition to $LIBS, and if so, adds -lieee to $LIBS. The second snippet writes a test program to see if the function '__fpu_control' exists with the current collection of $LIBS. If it doesn't, it tries it again with -lieee, and adds -lieee to $LIBS if it finds it then.) Pesonally, I think the patch should just be reversed... The comment above the check certainly could be read as 'Linux requires -lieee for correct f.p. operations', and perhaps that's how it was meant. -- Thomas Wouters <thomas@xs4all.net> Hi! I'm a .signature virus! copy me into your .signature file to help me spread!
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4