* config.make.in (includedir): New variable, substituted by configure.
Reported missing by Jocelyn Fournier <joc@presence-pc.com>.
* Makeconfig (includedir): Use $(prefix), not $(exec_prefix).
# Where to install the header files.
ifndef includedir
-includedir = $(exec_prefix)/include
+includedir = $(prefix)/include
endif
inst_includedir = $(install_root)$(includedir)
libexecdir = @libexecdir@
rootsbindir = @libc_cv_rootsbindir@
infodir = @infodir@
+includedir = @includedir@
# Should we use and build ldconfig?
use-ldconfig = @use_ldconfig@