Revert "feat/build-improvements (#4516)"

This reverts commit d1defc73f8.

Makefile

@@ -12,7 +12,6 @@
 
 # This will be overwritten in the command line running this Makefile.
 build_env = development
-languages = none
 
 # -----------------------------------------------------------------------------
 # Build search index
@@ -69,7 +68,7 @@ SUBDIRS := $(shell find . -regex "./[a-z\.]+\.[a-z]+/.*/Makefile" | xargs dirnam
 all: $(SUBDIRS)
 $(SUBDIRS): .FORCE
 	echo "* Preparing subdirectory $@"
-	$(MAKE) --silent --directory=$@ languages="$(languages)"
+	$(MAKE) --silent --directory=$@
 
 # -----------------------------------------------------------------------------
 # Create XML symlinks
@@ -83,7 +82,9 @@ $(SUBDIRS): .FORCE
 # otherwise. This symlinks make sure that phase 2 can easily use the right file
 # for each language, also as a prerequisite in the Makefile.
 
-TEXTS_LINKS := $(foreach lang,$(languages),global/data/texts/.texts.$(lang).xml)
+LANGUAGES := $(shell ls -xw0 global/languages)
+
+TEXTS_LINKS := $(foreach lang,$(LANGUAGES),global/data/texts/.texts.$(lang).xml)
 
 all: $(TEXTS_LINKS)
 global/data/texts/.texts.%.xml: .FORCE
@@ -93,7 +94,7 @@ global/data/texts/.texts.%.xml: .FORCE
 	  ln -sf texts.en.xml $@; \
 	fi
 
-TOPBANNER_LINKS := $(foreach lang,$(languages),global/data/topbanner/.topbanner.$(lang).xml)
+TOPBANNER_LINKS := $(foreach lang,$(LANGUAGES),global/data/topbanner/.topbanner.$(lang).xml)
 
 all: $(TOPBANNER_LINKS)
 global/data/topbanner/.topbanner.%.xml: .FORCE
@@ -133,7 +134,7 @@ default_xsl:
 .PHONY: localmenus
 all: localmenus
 localmenus: $(SUBDIRS)
-	tools/update_localmenus.sh "$(languages)"
+	tools/update_localmenus.sh
 
 # -----------------------------------------------------------------------------
 # Update XML filelists
@@ -154,4 +155,4 @@ localmenus: $(SUBDIRS)
 .PHONY: xmllists
 all: xmllists
 xmllists: $(SUBDIRS)
-	tools/update_xmllists.sh "$(languages)"
+	tools/update_xmllists.sh