Re: reporting a configure bug with curl

[Akim Demaille]

| Hello,
| I'm trying to compile Curl http://curl.haxx.se/download.html v7.10.3
| I see the following message with:
| ./configure --prefix=/usr/local/curl --exec-prefix=/usr/local/curl --with-ss
| l=/usr/local/openssl/0.9.7
| 
| 
| configure: WARNING: net/if.h: present but cannot be compiled
| configure: WARNING: net/if.h: check for missing prerequisite headers?
| configure: WARNING: net/if.h: proceeding with the preprocessor's result
| configure: WARNING:     ## ------------------------------------ ##
| configure: WARNING:     ## Report this to address@hidden ##
| configure: WARNING:     ## ------------------------------------ ##
| checking for net/if.h... yes
| checking netinet/in.h usability... yes
| checking netinet/in.h presence... yes
| checking for netinet/in.h... yes
| checking netinet/if_ether.h usability... no
| checking netinet/if_ether.h presence... yes
| configure: WARNING: netinet/if_ether.h: present but cannot be compiled
| configure: WARNING: netinet/if_ether.h: check for missing prerequisite
| headers?
| configure: WARNING: netinet/if_ether.h: proceeding with the preprocessor's
| result
| configure: WARNING:     ## ------------------------------------ ##
| configure: WARNING:     ## Report this to address@hidden ##
| configure: WARNING:     ## ------------------------------------ ##
| 
| 
| Other information:
| solaris 2.8 on a sparc platform.
| 
| If you need anything more. mail me.
| 
| 
| Peter Kassies
| Business consultant
| 
| Rubicon BV
| Postbus 169
| 4130 ED  Vianen
| 
| tel :  0347 . 35 88 00
| fax :  0347 . 35 88 11
| mob :  06 . 557 556 37
| address@hidden
| http://www.rubicongroup.biz
| 
| 
| 
| 
Please, report this to the package maintainers, as it's a configure.ac
problem.  The Autoconf 2.57 doc says:

      Previous versions of Autoconf merely checked whether the header was
   accepted by the preprocessor.  This was changed because the old test was
   inappropriate for typical uses.  Headers are typically used to compile,
   not merely to preprocess, and the old behavior sometimes accepted
   headers that clashed at compile-time.  If you need to check whether a
   header is preprocessable, you can use `AC_PREPROC_IFELSE' (*note
   Running the Preprocessor::).
   
      This scheme, which improves the robustness of the test, also requires
   that you make sure that headers that must be included before the
   HEADER-FILE be part of the INCLUDES, (*note Default Includes::).  If
   looking for `bar.h', which requires that `foo.h' be included before if
   it exists, we suggest the following scheme:
   
   
   AC_CHECK_HEADERS([foo.h])
   AC_CHECK_HEADERS([bar.h], [], [],
   [#if HAVE_FOO_H
   # include <foo.h>
   # endif
   ])

Thanks!