One way to record the results of tests is to set output variables,
which are shell variables whose values are substituted into files that
configure outputs. The two macros below create new output
variables. See section Preset Output Variables, for a list of output
variables that are always available.
AC_OUTPUTsubstitute the variable variable into output files (typically one or more `Makefile's). This means that
AC_OUTPUTwill replace instances of `@variable@' in input files with the value that the shell variable variable has when
AC_OUTPUTis called. The value of variable should not contain literal newlines.
AC_OUTPUTinsert (without substitutions) the contents of the file named by shell variable variable into output files. This means that
AC_OUTPUTwill replace instances of `@variable@' in output files (such as `Makefile.in') with the contents of the file that the shell variable variable names when
AC_OUTPUTis called. Set the variable to `/dev/null' for cases that do not have a file to insert.
This macro is useful for inserting `Makefile' fragments containing
special dependencies or other
make directives for particular host
or target types into `Makefile's. For example, `configure.in'
and then a `Makefile.in' could contain:
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