[jira] [Created] (XERCESC-2260) Header include test uses #if instead of #ifdef

["Thomas Klausner (Jira)" <xe...@xml.apache.org>]

Thomas Klausner created XERCESC-2260:
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             Summary: Header include test uses #if instead of #ifdef
                 Key: XERCESC-2260
                 URL: https://issues.apache.org/jira/browse/XERCESC-2260
             Project: Xerces-C++
          Issue Type: Bug
          Components: Build
    Affects Versions: 3.2.4
         Environment: pkgsrc (on NetBSD)
            Reporter: Thomas Klausner
         Attachments: patch-src_xercesc_util_Xerces__autoconf__config.hpp.cmake.in

When building xerces-c 3.2.4, it detects some system headers during the configuration step and then defines symbols if these are headers are found.

If the headers are not found, the symbols are just not defined (instead of being defined to the value zero).

However, the installed header files (that other projects use) check these symbols with `#if` instead of `#ifdef`, which doesn't work well with undefined symbols.

 

I've attached a patch switching which fixes the problem for me.



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