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Missing prerequisite headers

From: Steve Chaplin
Subject: Missing prerequisite headers
Date: 30 Jul 2003 12:28:50 +0800

Regarding this problem which has now become an autoconf FAQ:

configure: WARNING: linux/irda.h: present but cannot be compiled
configure: WARNING: linux/irda.h:     check for missing prerequisite
configure: WARNING: linux/irda.h: see the Autoconf documentation
configure: WARNING: linux/irda.h:     section "Present But Cannot Be
configure: WARNING: linux/irda.h: proceeding with the preprocessor's
configure: WARNING: linux/irda.h: in the future, the compiler will take
configure: WARNING:     ## ------------------------------------------ ##
configure: WARNING:     ## Report this to the AC_PACKAGE_NAME lists.  ##
configure: WARNING:     ## ------------------------------------------ ##

The FAQ suggests modifying configure.in to #include the prerequisite
header file - so the problem is a package maintainers problem.

Wouldn't it be better to first ask the header file author/maintainer to
modify the header to #include the prerequisite file (I assume this fixes
the problem) fixing the problem in one go for all packages that use the
header check?

Steve Chaplin <address@hidden>

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