Bloodnok has asked for the wisdom of the Perl Monks concerning the following question:

Greeting fellow monastarians ,

Using v5.12.4 perl on Ubuntu 11.10, I seem to have run into problem(s) using h2xs on a header file including it's own nested header file(s) - whereby the attempt always fails to #include the nested file : 

h2xs -Oxan IBM::Notes  IBM/Notes/acl
Defaulting to backwards compatibility with perl 5.12.4
If you intend this module to be compatible with earlier perl versions,
+ please
specify a minimum perl version with the -b option.

Overwriting existing IBM-Notes!!!
Writing IBM-Notes/ppport.h
Scanning typemaps...
 Scanning /usr/share/perl/5.12/ExtUtils/typemap
Scanning IBM/Notes/acl.h for functions...
In file included from <stdin>:1:0:
IBM/Notes/acl.h:24:20: fatal error: global.h: No such file or director
+y
compilation terminated.
In file included from <stdin>:1:0:
IBM/Notes/acl.h:24:20: fatal error: global.h: No such file or director
+y
compilation terminated.
Scanning IBM/Notes/acl.h for typedefs...
Writing IBM-Notes/lib/IBM/Notes.pm
Writing IBM-Notes/Notes.xs
Writing IBM-Notes/fallback/const-c.inc
Writing IBM-Notes/fallback/const-xs.inc
Writing IBM-Notes/Makefile.PL
Writing IBM-Notes/README
Writing IBM-Notes/t/IBM-Notes.t
Writing IBM-Notes/Changes
Writing IBM-Notes/MANIFEST

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I've tried the following, all without any success ....

In the interests of completeness, I have tried googling for the/any answer/help, but also to no avail, so any & all suggestions/advice gratefully received.

TIA & best rgds to all ,

A user level that continues to overstate my experience :-))

Replies are listed 'Best First'.
Re: h2xs problem handling nested include file(s)
by Khen1950fx (Canon) on Jul 27, 2012 at 15:46 UTC
    First, run h2ph. It'll convert C header files to Perl header files. For eample, convert acl.h: 
    cd /usr/include
h2ph sys/acl.h

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    Better yet, translate all the headers in one go: 
    h2ph *.h */*.h

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    Then run h2xs again.
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      TFT, I'll try it, but I read somewhere, during my search, that the use of h2ph is deprecated ... worth a go, nontheless, especially if it works :-)

      A user level that continues to overstate my experience :-))
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Re: h2xs problem handling nested include file(s)
by Athanasius (Archbishop) on Jul 28, 2012 at 03:13 UTC

    There may also be a workaround using the C preprocessor. For example, GCC’s cpp has an option -dD which outputs the result of preprocessing (including all nested #include’d headers), but retains the #define directives for all non-predefined macros. See http://gcc.gnu.org/onlinedocs/gcc-3.2/cpp/Invocation.html#Invocation.

    So, if h2ph doesn’t work out, this approach may be worth investigating.

    HTH,

    Athanasius <°(((>< contra mundum

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Re: h2xs problem handling nested include file(s)
by Anonymous Monk on Jul 28, 2012 at 02:12 UTC
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