Change in coreboot[master]: Makefile.inc: Rewrite $(files-in-dir)

[Nico Huber (Code Review)]

Nico Huber has uploaded this change for review. ( https://review.coreboot.org/27324

Change subject: Makefile.inc: Rewrite $(files-in-dir)
......................................................................

Makefile.inc: Rewrite $(files-in-dir)

The $(files-in-dir) macro is supposed to return all files (out of a
given set) that reside directly (non-recursive) in a given directory.
While the current solution worked splendidly, we can achieve the same
without recursive macros that look at each parent dir individually.

This also fixes a future make error, as make doesn't like the variable
name ` ` anymore ;)

Change-Id: Iac0eacdf91b8b5098592ad301c1f3fdb632454e9
Signed-off-by: Nico Huber 
---
M Makefile.inc
1 file changed, 8 insertions(+), 18 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/24/27324/1

diff --git a/Makefile.inc b/Makefile.inc
index 446e321..67ddb63 100644
--- a/Makefile.inc
+++ b/Makefile.inc
@@ -155,29 +155,19 @@
 # Helper functions for ramstage postprocess
 spc :=
 spc +=
-$(spc) :=
-$(spc) +=
 comma := ,

-# files-in-dir-recursive,dir,files
-files-in-dir-recursive=$(filter $(1)%,$(2))
+# Returns all files and dirs below `dir` (recursively).
+# files-below-dir,dir,files
+files-below-dir=$(filter $(1)%,$(2))

-# parent-dir,dir/
-parent-dir=$(dir $(if $(patsubst /%,,$(1)),,/)$(subst $( ),/,$(strip $(subst /, ,$(1)))))
+# Returns all dirs below `dir` (recursively).
+# dirs-below-dir,dir,files
+dirs-below-dir=$(filter-out $(1),$(sort $(dir $(call files-below-dir,$(1),$(2)))))

-# filters out exactly the directory specified
-# filter-out-dir,dir_to_keep,dirs
-filter-out-dir=$(filter-out $(1),$(2))
-
-# filters out dir_to_keep and all its parents
-# filter-out-dirs,dir_to_keep,dirs
-filter-out-dirs=$(if $(filter-out ./ /,$(1)),$(call filter-out-dirs,$(call parent-dir,$(1)),$(call filter-out-dir,$(1),$(2))),$(call filter-out-dir,$(1),$(2)))
-
-# dir-wildcards,dirs
-dir-wildcards=$(addsuffix %,$(1))
-
+# Returns all files directly in `dir` (non-recursively).
 # files-in-dir,dir,files
-files-in-dir=$(filter-out $(call dir-wildcards,$(call filter-out-dirs,$(1),$(sort $(dir $(2))))),$(call files-in-dir-recursive,$(1),$(2)))
+files-in-dir=$(filter-out $(addsuffix %,$(call dirs-below-dir,$(1),$(2))),$(call files-below-dir,$(1),$(2)))

#######################################################################
 # reduce command line length by linking the objects of each