BLD: Improve mingw-w64 detection of check_embedded_lapack.

1 files changed, 17 insertions, 0 deletions

diff --git a/numpy/distutils/system_info.py b/numpy/distutils/system_info.py
index d73aef59f..25e8a63df 100644
--- a/numpy/distutils/system_info.py
+++ b/numpy/distutils/system_info.py
@@ -1722,6 +1722,23 @@ class openblas_lapack_info(openblas_info):
                 res = False
         finally:
             shutil.rmtree(tmpdir)
+        if sys.platform == 'win32' and not res:
+            c = distutils.ccompiler.new_compiler(compiler='mingw32')
+            tmpdir = tempfile.mkdtemp()
+            src = os.path.join(tmpdir, 'source.c')
+            out = os.path.join(tmpdir, 'a.out')
+            try:
+                with open(src, 'wt') as f:
+                    f.write(s)
+                obj = c.compile([src], output_dir=tmpdir)
+                try:
+                    c.link_executable(obj, out, libraries=info['libraries'],
+                                    library_dirs=info['library_dirs'])
+                    res = True
+                except distutils.ccompiler.LinkError:
+                    res = False
+            finally:
+                shutil.rmtree(tmpdir)
         return res