diff options
Diffstat (limited to 'numpy/distutils/misc_util.py')
| -rw-r--r-- | numpy/distutils/misc_util.py | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/numpy/distutils/misc_util.py b/numpy/distutils/misc_util.py index 1e10e92fd..0eaaeb736 100644 --- a/numpy/distutils/misc_util.py +++ b/numpy/distutils/misc_util.py @@ -1687,6 +1687,43 @@ class Configuration(object): and will be installed as foo.ini in the 'lib' subpath. + Cross-compilation + ----------------- + When cross-compiling with numpy distutils, it might be necessary to + use modified npy-pkg-config files. Using the default/generated files + will link with the host libraries (i.e. libnpymath.a). For + cross-compilation you of-course need to link with target libraries, + while using the host Python installation. + + You can copy out the numpy/core/lib/npy-pkg-config directory, add a + pkgdir value to the .ini files and set NPY_PKG_CONFIG_PATH environment + variable to point to the directory with the modified npy-pkg-config + files. + + Example npymath.ini modified for cross-compilation:: + + [meta] + Name=npymath + Description=Portable, core math library implementing C99 standard + Version=0.1 + + [variables] + pkgname=numpy.core + pkgdir=/build/arm-linux-gnueabi/sysroot/usr/lib/python3.7/site-packages/numpy/core + prefix=${pkgdir} + libdir=${prefix}/lib + includedir=${prefix}/include + + [default] + Libs=-L${libdir} -lnpymath + Cflags=-I${includedir} + Requires=mlib + + [msvc] + Libs=/LIBPATH:${libdir} npymath.lib + Cflags=/INCLUDE:${includedir} + Requires=mlib + """ if subst_dict is None: subst_dict = {} @@ -2092,9 +2129,22 @@ def get_numpy_include_dirs(): return include_dirs def get_npy_pkg_dir(): - """Return the path where to find the npy-pkg-config directory.""" + """Return the path where to find the npy-pkg-config directory. + + If the NPY_PKG_CONFIG_PATH environment variable is set, the value of that + is returned. Otherwise, a path inside the location of the numpy module is + returned. + + The NPY_PKG_CONFIG_PATH can be useful when cross-compiling, maintaining + customized npy-pkg-config .ini files for the cross-compilation + environment, and using them when cross-compiling. + + """ # XXX: import here for bootstrapping reasons import numpy + d = os.environ.get('NPY_PKG_CONFIG_PATH') + if d is not None: + return d d = os.path.join(os.path.dirname(numpy.__file__), 'core', 'lib', 'npy-pkg-config') return d |