On Friday, 21 March 2003 at 14:21, Paul Eggert wrote: I've noted some typos in case you want to fix them.
> The next version of Autoconf will have some documentation about this. > Here's the current draft, written by Akim Demaille, in Texinfo format: > > > > @node Present But Cannot Be Compiled > @section Header Present But Cannot Be Compiled > > The most important guideline to bare in mind when checking for bear > features is to mock as much as possible the intended use. mimic > Unfortunately, old versions of @code{AC_CHECK_HEADER} and > @code{AC_CHECK_HEADERS} failed to follow this idea, and used to call called > the preprocessor, instead of the compiler, to check for headers. As a > result, incompatibilities between headers went unnoticed during > configuration, and maintainers finally had to deal with this issue > elsewhere. > > Since Autoconf 2.56 both checks are performed, and @code{configure} As of > complains loudly if the compiler and the preprocessor do not agree. > For the time being the result is that of the preprocessor, so that ^used > maintainers can adjust their @file{configure.ac}, but in the near > future, the compiler only will be considered. ^only ----