BLD: link against math library explicitly. close #1955

Author: wesm

pandas/src/generate_code.py

@@ -35,10 +35,6 @@
 cimport util
 from util cimport is_array, _checknull, _checknan
 
-cdef extern from "math.h":
-    double sqrt(double x)
-    double fabs(double)
-
 # import datetime C API
 PyDateTime_IMPORT
 

pandas/src/generated.pyx

@@ -32,10 +32,6 @@ ctypedef unsigned char UChar
 cimport util
 from util cimport is_array, _checknull, _checknan
 
-cdef extern from "math.h":
-    double sqrt(double x)
-    double fabs(double)
-
 # import datetime C API
 PyDateTime_IMPORT
 

setup.py

@@ -384,6 +384,7 @@ def srcpath(name=None, suffix='.pyx', subdir='src'):
                              'pandas/src/datetime/np_datetime.c',
                              'pandas/src/datetime/np_datetime_strings.c'],
                     include_dirs=[np.get_include()],
+                    libraries=['m'],  # some linux distros require it
                     # pyrex_gdb=True,
                     # extra_compile_args=['-Wconversion']
                     )