[Numpy-svn] [numpy/numpy] a356a1: BLD: try linking a file if compile long double rep...

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/numpy/numpy
  Commit: a356a103460d1b97428108431f7e73e7eda9ee85
      https://github.com/numpy/numpy/commit/a356a103460d1b97428108431f7e73e7eda9ee85
  Author: Julian Taylor <jtaylor.debian at googlemail.com>
  Date:   2014-10-15 (Wed, 15 Oct 2014)

  Changed paths:
    M numpy/core/setup_common.py

  Log Message:
  -----------
  BLD: try linking a file if compile long double repr detection fails

When compiler uses link time optimization it will not emit the binary
representation of the long double during linking. This prevents building
numpy with -flto.
To avoid this try linking the object when the compile detection failed.
With this change numpy can be built with link time optimization with 4 worker
processes using following command:

CC='gcc -fno-fat-lto-objects -flto=4 -fuse-linker-plugin -O3' \
LDSHARED='gcc -fno-fat-lto-objects -flto=4 -fuse-linker-plugin -shared
-O3' AR=gcc-ar \
python setup.py build_ext

See also:
https://www.mail-archive.com/numpy-discussion@scipy.org/msg45535.html

Should also work with icc's -ipo switch (probably closes gh-4992)


  Commit: f6c5611e941409faa36385b8d4c7d321cb7c03d4
      https://github.com/numpy/numpy/commit/f6c5611e941409faa36385b8d4c7d321cb7c03d4
  Author: Charles Harris <charlesr.harris at gmail.com>
  Date:   2014-10-16 (Thu, 16 Oct 2014)

  Changed paths:
    M numpy/core/setup_common.py

  Log Message:
  -----------
  Merge pull request #5190 from juliantaylor/lto-support

BLD: try linking a file if compile long double repr detection fails


Compare: https://github.com/numpy/numpy/compare/443a49a271e6...f6c5611e9414