Ignore files with '#' in their names, e.g. emacs lock files

Also remove usage of grep for ignoring files since find
can do this directly.

core/core.mk

@@ -184,8 +184,8 @@ core_http_get = curl -Lf$(if $(filter-out 0,$(V)),,s)o $(call core_native_path,$
 
 core_eq = $(and $(findstring $(1),$(2)),$(findstring $(2),$(1)))
 
-# We skip files that contain spaces because they end up causing issues.
-core_find = $(if $(wildcard $1),$(shell find $(1:%/=%) \( -type l -o -type f \) -name $(subst *,\*,$2) | grep -v " "))
+# We skip files that contain spaces or '#' because they end up causing issues.
+core_find = $(if $(wildcard $1),$(shell find $(1:%/=%) \( -type l -o -type f \) -name $(subst *,\*,$2) -not -name "*[ \#]*"))
 
 core_lc = $(subst A,a,$(subst B,b,$(subst C,c,$(subst D,d,$(subst E,e,$(subst F,f,$(subst G,g,$(subst H,h,$(subst I,i,$(subst J,j,$(subst K,k,$(subst L,l,$(subst M,m,$(subst N,n,$(subst O,o,$(subst P,p,$(subst Q,q,$(subst R,r,$(subst S,s,$(subst T,t,$(subst U,u,$(subst V,v,$(subst W,w,$(subst X,x,$(subst Y,y,$(subst Z,z,$(1)))))))))))))))))))))))))))
 

test/core_makedep.mk

@@ -25,6 +25,26 @@ core-makedep-behavior: init
 	$t test -f $(APP)/ebin/boy.beam
 	$t test -f $(APP)/ebin/human.beam
 
+core-makedep-ignore-special-files: init
+
+	$i "Bootstrap a new OTP library named $(APP)"
+	$t mkdir $(APP)/
+	$t cp ../erlang.mk $(APP)/
+	$t $(MAKE) -C $(APP) -f erlang.mk bootstrap-lib $v
+	$t mkdir $(APP)/src/core
+
+	$i "Generate related .erl files"
+	$t printf "%s\n" "-module(human)." "-export([live/0])." "live() -> ok." > $(APP)/src/core/human.erl
+	$t printf "%s\n" "-module(boy)." "-import(human,[live/0])." > $(APP)/src/boy.erl
+	$t printf "%s\n" "-module(boy)." "-import(human,[live/0])." > $(APP)/src/.#boy.erl
+	$t $(MAKE) -C $(APP) $v
+
+	$i "Check that all compiled files exist"
+	$t test -f $(APP)/$(APP).d
+	$t test -f $(APP)/ebin/$(APP).app
+	$t test -f $(APP)/ebin/boy.beam
+	$t test -f $(APP)/ebin/human.beam
+
 core-makedep-import: init
 
 	$i "Bootstrap a new OTP library named $(APP)"