Building on MinGW

mkleehammer/pyodbc/#1168

setup.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 
-import sys, os, shlex, re
+import sys, os, re, shlex, sysconfig
 from os.path import exists, join, isdir, relpath, expanduser
 from pathlib import Path
 from inspect import cleandoc
@@ -83,7 +83,14 @@ def get_compiler_settings():
         'define_macros': [('PYODBC_VERSION', VERSION)]
     }
 
-    if os.name == 'nt':
+    if 'mingw' in sysconfig.get_platform():
+        # Windows mingw (note that os.name == 'nt' is True)
+        settings['extra_compile_args'].extend([
+            '-Wno-write-strings',
+        ])
+        settings['libraries'].append('odbc32')
+
+    elif os.name == 'nt':
         settings['extra_compile_args'].extend([
             '/Wall',
             '/wd4514',     # unreference inline function removed

src/pyodbc.h

@@ -28,7 +28,8 @@ typedef long long INT64;
 typedef unsigned long long UINT64;
 #define _strcmpi strcasecmp
 #define _strdup strdup
-  inline int max(int lhs, int rhs) { return (rhs > lhs) ? rhs : lhs; }
+inline int max(int lhs, int rhs) { return (rhs > lhs) ? rhs : lhs; }
+inline int min(int lhs, int rhs) { return (rhs < lhs) ? rhs : lhs; }
 #endif
 
 #ifdef __SUN__
@@ -45,7 +46,7 @@ typedef unsigned long long UINT64;
 #include <structmember.h>
 #include <bytesobject.h>
 
-#ifdef __CYGWIN__
+#if defined(__CYGWIN__) || defined(__MINGW32__)
 #include <windows.h>
 #endif
 

src/pyodbcmodule.cpp

@@ -303,6 +303,7 @@ static bool AllocateEnv()
     }
 
     SQLPOINTER defaultVersion = (SQLPOINTER)SQL_OV_ODBC3;
+    #ifdef SQL_OV_ODBC3_80
     PyObject* odbcversion = PyObject_GetAttrString(pModule, "odbcversion");
     if (PyObject_TypeCheck(odbcversion, &PyUnicode_Type)) {
         if (PyUnicode_CompareWithASCIIString(odbcversion, "3.8") == 0)
@@ -311,7 +312,7 @@ static bool AllocateEnv()
         }
     }
     Py_DECREF(odbcversion);
-
+    #endif
     if (!SQL_SUCCEEDED(SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, defaultVersion, sizeof(int))))
     {
         PyErr_SetString(PyExc_RuntimeError, "Unable to set SQL_ATTR_ODBC_VERSION attribute.");