Re: Automatic dependency checking problems

Thore Karlsen wrote:

> I'm having some issues with this.
> 
> First: I'm running AAP under cygwin, but I'm compiling with MSVC. This
> means that gcc can be found, so AAP will default to using that to
> generate the dependencies. This doesn't work, for a couple of reasons:
> 
> 1. gcc doesn't understand the MSVC compiler flags.
> 2. The dependency files use .o for object files, not .obj which is the
> standard suffix for the windows platform.
> 
> It would be good if I could tell AAP not to try to use gcc for
> dependency checking, regardless of whether it's found or not. There
> doesn't seem to be a good way to do this.

This is actually mentioned in the default.aap recipe as a todo item.

I would think that when $CC is set to use MSVC, the test that gcc exists
should fail and Aap will use aap_depend_c() instead.  Why doesn't it
work that way?  Is $CC still set to gcc perhaps?

> There is also a problem with the built-in dependency checking function,
> aap_depend_c. It doesn't automatically look in the directory of a source
> file for the header file. If the directory structure is like this:
> 
>   main.aap
>   Project/main.cpp
>   Project/main.h
> 
> main.h will not be listed as a dependency, because main.h can't be found
> in the list of directories aap_depend_c searches. It should
> automatically search the Project directory, because that's what C/C++
> compilers do.

The order in which directories are searched for include files is often a
cause of trouble.  I think when using a file in double quotes the search
always looks in the directory of the source file first.  When using <>
that is skipped.  My old K&R C book mentions this.

The code apparently uses the current directory instead of the directory
of the source file.  I suppose that's wrong.  Please try this patch:

*** RecPython.py~	Mon Mar  8 20:17:37 2004
--- RecPython.py	Thu May  6 19:58:10 2004
***************
*** 864,870 ****
      scanned = {os.path.abspath(source) : 0}
  
      # Make the local pathlist from "-Idir" arguments.
!     localpathlist = [ "." ]
      if flags is None:
          flags = get_var_val_int(recdict, "CFLAGS")
      for n in [get_var_val_int(recdict, "CPPFLAGS"),
--- 864,872 ----
      scanned = {os.path.abspath(source) : 0}
  
      # Make the local pathlist from "-Idir" arguments.
!     # Should we include the current directory?  Probably not.  We do look in
!     # the directory of the source file when double quotes are used.
!     localpathlist = [ ]
      if flags is None:
          flags = get_var_val_int(recdict, "CFLAGS")
      for n in [get_var_val_int(recdict, "CPPFLAGS"),
***************
*** 951,956 ****
--- 953,962 ----
                  msg_extra(recdict, _('Cannot find included file "%s"' % fname))
                  return
  
+         mypath = os.path.dirname(fname)
+         if mypath == '':
+             mypath = '.'
+ 
          f = open(fname)
          msg_extra(recdict, _('Scanning "%s" for dependencies') % fname)
  
***************
*** 987,993 ****
                                  # Search for the file in the specified path for
                                  # include files.
                                  if quote == '"':
!                                     pathlist = localpathlist + globalpathlist
                                  else:
                                      pathlist = globalpathlist + localpathlist
                                  fn = search_path(pathlist, line[s:i])
--- 993,999 ----
                                  # Search for the file in the specified path for
                                  # include files.
                                  if quote == '"':
!                                     pathlist = [ mypath ] + localpathlist + globalpathlist
                                  else:
                                      pathlist = globalpathlist + localpathlist
                                  fn = search_path(pathlist, line[s:i])

-- 
hundred-and-one symptoms of being an internet addict:
140. You'd rather catch a score on the web than watch the game as
     it is being played on tv.

 /// Bram Moolenaar -- [email protected] -- http://www.Moolenaar.net   \\\
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