better handling for the lack of a compiler

git-svn-id: http://simplejson.googlecode.com/svn/trunk@58 a4795897-2c25-0410-b006-0d3caba88fa1

setup.py

@@ -15,7 +15,8 @@
 
 from setuptools import setup, find_packages, Extension, Feature
 from distutils.command.build_ext import build_ext
-from distutils.errors import CCompilerError
+from distutils.errors import CCompilerError, DistutilsExecError, \
+    DistutilsPlatformError
 
 VERSION = '1.7.4'
 DESCRIPTION = "Simple, fast, extensible JSON encoder/decoder for Python"
@@ -45,6 +46,6 @@
 """.splitlines()))
 
 
-BUILD_EXT_WARNING="""
+BUILD_EXT_WARNING="""\
 WARNING: The C extension could not be compiled, speedups are not enabled.
 
@@ -49,7 +50,7 @@
 WARNING: The C extension could not be compiled, speedups are not enabled.
 
-Above is the output showing how the compilation failed.
+Below is the output showing how the compilation failed:
 """
 
 class ve_build_ext(build_ext):
     # This class allows C extension building to fail.
@@ -52,7 +53,14 @@
 """
 
 class ve_build_ext(build_ext):
     # This class allows C extension building to fail.
+
+    def run(self):
+        try:
+            build_ext.run(self)
+        except DistutilsPlatformError, x:
+            self._unavailable(x)
+
     def build_extension(self, ext):
         try:
             build_ext.build_extension(self, ext)
@@ -56,6 +64,9 @@
     def build_extension(self, ext):
         try:
             build_ext.build_extension(self, ext)
-        except CCompilerError, x:
-            print ('*'*70+'\n')
+        except (CCompilerError, DistutilsExecError), x:
+           self._unavailable(x)
+
+    def _unavailable(self, exc):
+         print '*'*70
          print BUILD_EXT_WARNING
@@ -61,5 +72,6 @@
          print BUILD_EXT_WARNING
-            print ('*'*70+'\n')
+         print exc
+         print '*'*70
 
 speedups = Feature(
     "options C speed-enhancement modules",