1 files changed, 4 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index f3537c8..44e137e 100644
--- a/Makefile
+++ b/Makefile
@@ -97,6 +97,7 @@ $(KCONFIG):
 
 CHECK_COMMAND = $(shell command -v $(BUILD_COMMAND) 2> /dev/null)
 CHECK_SUBCMD = $(shell command -v $(BUILD_SUBCMD) 2> /dev/null)
+CHECK_FILES = $(shell find $(CURDIR) -name \*\.tex -exec grep -lP '\t' \{\} \;)
 
 PHONY += check
 check: ;
@@ -106,6 +107,9 @@ endif
 ifeq ($(CHECK_SUBCMD),)
 	$(error install required tool: $(BUILD_SUBCMD))
 endif
+ifneq ($(CHECK_FILES),)
+	$(warning remove tabs from tex-files: $(CHECK_FILES))
+endif
 
 PHONY += menuconfig
 menuconfig: $(KMCONFIG)