Solaris doesn't deliver a /usr/bin/cpp.  We have our own cpp in

/usr/lib/cpp, and we deliver GNU cpp in /usr/bin/gcpp, but we might not

find those simply by looking in $PATH.  So if we fail, try extra hard to

execute another cpp.  We try GNU's first, since it's more likely what folks

using pycparser will expect (for instance, it handles C++-style comments).

--- pycparser-2.10/pycparser/__init__.py	Sat Aug  3 06:05:22 2013

+++ pycparser-2.10/pycparser/__init__.py	Fri Apr 11 14:58:36 2014

@@ -10,6 +10,7 @@

 __all__ = ['c_lexer', 'c_parser', 'c_ast']

 __version__ = '2.10'

+import errno

 from subprocess import Popen, PIPE

 from .c_parser import CParser

@@ -28,29 +29,41 @@

         When successful, returns the preprocessed file's contents.

         Errors from cpp will be printed out.

     """

-    path_list = [cpp_path]

-    if isinstance(cpp_args, list):

-        path_list += cpp_args

-    elif cpp_args != '':

-        path_list += [cpp_args]

-    path_list += [filename]

+    cpp_list = [cpp_path, "/usr/bin/gcpp", "/usr/lib/cpp"]

-    try:

-        # Note the use of universal_newlines to treat all newlines

-        # as \n for Python's purpose

-        #

-        pipe = Popen(   path_list,

-                        stdout=PIPE,

-                        universal_newlines=True)

-        text = pipe.communicate()[0]

-    except OSError as e:

+    for cpp_path in cpp_list:

+        path_list = [cpp_path]

+        if isinstance(cpp_args, list):

+            path_list += cpp_args

+        elif cpp_args != '':

+            path_list += [cpp_args]

+        path_list += [filename]

+

+        try:

+            # Note the use of universal_newlines to treat all newlines

+            # as \n for Python's purpose

+            #

+            pipe = Popen(   path_list,

+                            stdout=PIPE,

+                            universal_newlines=True)

+            text = pipe.communicate()[0]

+        except OSError as e:

+            # If cpp couldn't be found, just try the next one.

+            if e.errno == errno.ENOENT:

+                continue

+            # If we ran into some other error, raise a RuntimeError.

+            raise RuntimeError("Unable to invoke 'cpp'.\n" +

+                ('Original error: %s' % e))

+

+        return text

+

+    else:

+        # If we couldn't find a cpp, then raise a RuntimeError.

         raise RuntimeError("Unable to invoke 'cpp'.  " +

             'Make sure its path was passed correctly\n' +

             ('Original error: %s' % e))

-    return text

-

 def parse_file(filename, use_cpp=False, cpp_path='cpp', cpp_args='',

                parser=None):

     """ Parse a C file using pycparser.