b522f31d87
With the autoconf layer relocatable, teach the shared make
files to read sources from the source tree and write objects into the
build tree. The ~26 "standard" and "near-standard" module Makefiles now
build out-of-tree with no per-module edits.
scripts/defs.mak.in:
* Add MAGICSRC = @abs_top_srcdir@ (absolute source top) and derive each
module's srcdir/VPATH from CURDIR relative to the build top:
BUILD_TOP := $(abspath $(MAGICDIR))
MODULE_SUBPATH := $(subst $(BUILD_TOP),,$(CURDIR))
srcdir := $(MAGICSRC)$(MODULE_SUBPATH)
VPATH := $(srcdir)
(MAGICDIR keeps meaning the *build* top; in-tree the trees coincide.)
* CPPFLAGS: add -I${MAGICSRC} (source top, for "<module>/<hdr>.h") and
-I${srcdir} (same-dir headers), keeping -I${MAGICDIR} for the generated
database/database.h in the build top.
* MAGIC_VERSION/REVISION read ${MAGICSRC}/VERSION; MAGIC_COMMIT uses
`git -C ${MAGICSRC}` so it works from a build dir outside the work-tree.
rules.mak:
* Compile rule: `-c $*.c` -> `-c $< -o $@` so the source is found via
VPATH in srcdir and the object is written to the build cwd.
* Depend and tags rules: prefix sources with $(srcdir)/ (they are passed
to the compiler/ctags directly, which do not honor VPATH).
scripts/configure.in: AC_CONFIG_FILES([rules.mak:rules.mak]) copies the
VPATH-aware rules.mak into the build top, so a single ${MAGICDIR}
resolves both `include`s in every subdir Makefile. Regenerated configure.
Known limitation (v1): the Depend post-processing sed strips
absolute-path headers, so with an absolute srcdir most header deps are
dropped; out-of-tree incremental header-change rebuilds are weaker.
Depend is already "optimistic/optional"; relativizing is a follow-up.
Verified out-of-tree: `tiles` and `drc` (the latter #includes the
generated database/database.h) build to completion; all objects land in
the build tree; the source tree stays clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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|---|---|---|
| .. | ||
| .gitignore | ||
| config.guess | ||
| config.sub | ||
| configure | ||
| configure.in | ||
| configure_mac | ||
| defs.mak.in | ||
| install-sh | ||
| magic.spec.in | ||
| makedbh.in | ||
| missing | ||
| mkdirs | ||
| mkinstalldirs | ||
| preproc.py | ||
| printmans | ||