c++/4225: bad reference in an object file caused by the include method

[Wolfgang Bangerth]

The following reply was made to PR c++/4225; it has been noted by GNATS.

From: Wolfgang Bangerth <bangerth@ticam.utexas.edu>
To: gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: c++/4225: bad reference in an object file caused by the include
 method
Date: Fri, 15 Nov 2002 20:04:43 -0600 (CST)

 Presently (i.e. at the 3.2.1 stage), the documentation says:
   `CPATH'
   `C_INCLUDE_PATH'
   `CPLUS_INCLUDE_PATH'
   `OBJC_INCLUDE_PATH'
      [...]
 
      `CPATH' specifies a list of directories to be searched as if
      specified with `-I', but after any paths given with `-I' options
      on the command line.  The environment variable is used regardless
      of which language is being preprocessed.
 
      The remaining environment variables apply only when preprocessing
      the particular language indicated.  Each specifies a list of
      directories to be searched as if specified with `-isystem', but
      after any paths given with `-isystem' options on the command line.
 
 I.e., only the part that -isystem implies extern "C" on some systems is 
 now missing. Or at least I could not find it anywhere -isystem is 
 mentioned.
 
 W.
 
 -------------------------------------------------------------------------
 Wolfgang Bangerth              email:           bangerth@ticam.utexas.edu
                                www: http://www.ticam.utexas.edu/~bangerth