Switch tiles from the defs.mak srcdir *derivation* to configure-provided
substitution:
srcdir = @srcdir@
VPATH = @srcdir@
MAGICDIR = @top_builddir@
defs.mak's dual-mode guard now sees `srcdir` already set (origin=file) and
skips the $(abspath)/$(patsubst) srcdir computation for this module.
Verified: config.status writes srcdir=<src>/tiles into build/tiles/Makefile;
make -C tiles module compiles from that srcdir (libtiles.o, rc=0) with the
derivation bypassed. This is the template the remaining modules follow.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
First module of the Makefile.in migration (proof). Pure rename: the
Makefile content is unchanged, so config.status just copies it and the
module still builds via the defs.mak srcdir *derivation* (dual mode from
phase 1) -- the @srcdir@ substitution is a separate follow-up.
* git mv tiles/Makefile -> tiles/Makefile.in
* configure.in: AC_CONFIG_FILES([tiles/Makefile:tiles/Makefile.in]);
regenerated configure. config.status now creates build/tiles/Makefile,
so $(submake) recurses into tiles natively (make -C tiles), no -f.
* .gitignore: ignore the generated tiles/Makefile (in-tree it lands in the
source tree) -- added in this same commit so it can never be committed.
Verified out-of-tree: config.status writes build/tiles/Makefile,
make -C tiles module builds libtiles.o (rc=0).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Darryl L. Miles