MAINT: remove outdated Pyrex support from distutils (as far as possible).

1 files changed, 8 insertions, 39 deletions

diff --git a/numpy/distutils/command/build_src.py b/numpy/distutils/command/build_src.py
index 7463a0e17..2efcdea60 100644
--- a/numpy/distutils/command/build_src.py
+++ b/numpy/distutils/command/build_src.py
@@ -1,4 +1,4 @@
-""" Build swig, f2py, pyrex sources.
+""" Build swig and f2py sources.
 """
 from __future__ import division, absolute_import, print_function
 
@@ -13,12 +13,6 @@ from distutils.dep_util import newer_group, newer
 from distutils.util import get_platform
 from distutils.errors import DistutilsError, DistutilsSetupError
 
-def have_pyrex():
-    try:
-        import Pyrex.Compiler.Main
-        return True
-    except ImportError:
-        return False
 
 # this import can't be done here, as it uses numpy stuff only available
 # after it's installed
@@ -327,13 +321,9 @@ class build_src(build_ext.build_ext):
             self.ext_target_dir = self.get_package_dir(package)
 
         sources = self.generate_sources(sources, ext)
-
         sources = self.template_sources(sources, ext)
-
         sources = self.swig_sources(sources, ext)
-
         sources = self.f2py_sources(sources, ext)
-
         sources = self.pyrex_sources(sources, ext)
 
         sources, py_files = self.filter_py_files(sources)
@@ -450,6 +440,7 @@ class build_src(build_ext.build_ext):
         return new_sources
 
     def pyrex_sources(self, sources, extension):
+        """Pyrex not supported; this remains for Cython support (see below)"""
         new_sources = []
         ext_name = extension.name.split('.')[-1]
         for source in sources:
@@ -464,34 +455,12 @@ class build_src(build_ext.build_ext):
         return new_sources
 
     def generate_a_pyrex_source(self, base, ext_name, source, extension):
-        if self.inplace or not have_pyrex():
-            target_dir = os.path.dirname(base)
-        else:
-            target_dir = appendpath(self.build_src, os.path.dirname(base))
-        target_file = os.path.join(target_dir, ext_name + '.c')
-        depends = [source] + extension.depends
-        if self.force or newer_group(depends, target_file, 'newer'):
-            if have_pyrex():
-                import Pyrex.Compiler.Main
-                log.info("pyrexc:> %s" % (target_file))
-                self.mkpath(target_dir)
-                options = Pyrex.Compiler.Main.CompilationOptions(
-                    defaults=Pyrex.Compiler.Main.default_options,
-                    include_path=extension.include_dirs,
-                    output_file=target_file)
-                pyrex_result = Pyrex.Compiler.Main.compile(source,
-                                                           options=options)
-                if pyrex_result.num_errors != 0:
-                    raise DistutilsError("%d errors while compiling %r with Pyrex" \
-                          % (pyrex_result.num_errors, source))
-            elif os.path.isfile(target_file):
-                log.warn("Pyrex required for compiling %r but not available,"\
-                         " using old target %r"\
-                         % (source, target_file))
-            else:
-                raise DistutilsError("Pyrex required for compiling %r"\
-                                     " but notavailable" % (source,))
-        return target_file
+        """Pyrex is not supported, but some projects monkeypatch this method.
+
+        That allows compiling Cython code, see gh-6955.
+        This method will remain here for compatibility reasons.
+        """
+        return []
 
     def f2py_sources(self, sources, extension):
         new_sources = []