BLD: link against m library in sparse ext too pandas-dev#1955

Author: wesm

setup.py

@@ -380,7 +380,7 @@ def srcpath(name=None, suffix='.pyx', subdir='src'):
                                  'pandas/src/datetime/np_datetime_strings.h']
 
 # some linux distros require it
-libraries = ['m'] if 'win' not in sys.platform else []
+libraries = ['m'] if 'win32' not in sys.platform else []
 
 lib_ext = Extension('pandas.lib',
                     depends=lib_depends,
@@ -393,6 +393,11 @@ def srcpath(name=None, suffix='.pyx', subdir='src'):
                     # extra_compile_args=['-Wconversion']
                     )
 
+sparse_ext = Extension('pandas._sparse',
+                       sources=[srcpath('sparse', suffix=suffix)],
+                       include_dirs=[np.get_include()],
+                       libraries=libraries)
+
 period_ext = Extension('pandas._period',
                        depends=plib_depends + ['pandas/src/numpy_helper.h',
                                                'pandas/src/period.h'],
@@ -402,10 +407,6 @@ def srcpath(name=None, suffix='.pyx', subdir='src'):
                        include_dirs=[np.get_include()])
 
 
-sparse_ext = Extension('pandas._sparse',
-                       sources=[srcpath('sparse', suffix=suffix)],
-                       include_dirs=[np.get_include()])
-
 sandbox_ext = Extension('pandas._sandbox',
                         sources=[srcpath('sandbox', suffix=suffix)],
                         include_dirs=[np.get_include()])