# `compile-main' tends to be slower than `recompile' but can be parallelized
# with "make -j" and results in more deterministic compilation warnings.
-# cus-load ans finder-inf are not explicitly requested by anything, so
+# cus-load and finder-inf are not explicitly requested by anything, so
# we add them here to make sure they get built.
all: compile-main $(lisp)/cus-load.el $(lisp)/finder-inf.el
@: Let us check that we byte-compiled all the files.
doit:
# custom-deps and finder-data both used to scan _all_ the *.el files.
-# Now they avoid auto-generated files, which should avoid this
-# historical problem:
-# In parallel builds, they should not run at the same time as anything
-# else that might modify any .el files, eg autoloads (or each other).
+# This could lead to problems in parallel builds if automatically
+# generated *.el files (eg loaddefs etc) were being changed at the same time.
# One solution was to add autoloads as a prerequisite:
# http://lists.gnu.org/archive/html/emacs-pretest-bug/2007-01/msg00469.html
# http://lists.gnu.org/archive/html/bug-gnu-emacs/2007-12/msg00171.html
-# However, this means that running these targets modifies loaddefs.el,
+# However, this meant that running these targets modified loaddefs.el,
# every time (due to time-stamping). Calling these rules from
# bootstrap-after would modify loaddefs after src/emacs, resulting
# in make install remaking src/emacs for no real reason:
# http://lists.gnu.org/archive/html/emacs-devel/2008-02/msg00311.html
+# Nowadays these commands don't scan automatically generated files,
+# since they will never contain any useful information
+# (see finder-no-scan-regexp and custom-dependencies-no-scan-regexp).
$(lisp)/cus-load.el:
$(MAKE) $(MFLAGS) custom-deps
custom-deps: doit
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