The autoconf development tool creates a configure script from the configure.ac file.
ToDo This article is a stub. Please expand it.
How to create a configure.ac file
Error Messages
configure.ac: no proper invocation of AM_INIT_AUTOMAKE was found.
configure.ac: warning: macro 'AM_CXXFLAGS' not found in library
This warning occurs if the AM_CXXFLAGS macro in the configure.ac file is written using the wrong syntax.
Incorrect delimiters
The AM_CXXFLAGS macro does not use archbridge delimiters for its parameters:
AM_CXXFLAGS([-DUSE_TERMIO -DKLUDGELINEMODE]) # This syntax is not correct
Instead the AM_CXXFLAGS macro uses a traditional assignment operator, with doublequote symbols:
AM_CXXFLAGS="-DUSE_TERMIO -DKLUDGELINEMODE"
Resolution
Although this is a warning, correction is required, because subsequent compilation errors may take place, as a result of the AM_CXXFLAGS parameter being ineffective.
External Links
[http://vindaci.members.sonic.net/cbreak/projects/autotools/ Autotools Tutorial For Beginners (by Mark Kim)]
[http://www.galassi.org/mark//mydocs/autoconf_tutorial_toc.html Mark Galassi's Autoconf Tutorial]
[http://ac-archive.sourceforge.net/ The autoconf macro archive at sourceforge]