Add an EXTRA_CFLAGS make variable

This variable is _appended_ to the main CFLAGS variable and allows setting extra compiler options at make time. E.g $ make EXTRA_CFLAGS="..." ... Useful for quickly testing various extra warning flags. Suggested-by: Alejandro Colomar <[email protected]> Reviewed-by: Alejandro Colomar <[email protected]> Signed-off-by: Andrew Clayton <[email protected]>
ac000 · Mar 9, 2024 · a171b39 · a171b39
1 parent f55fa70
commit a171b39
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/auto/make b/auto/make
@@ -20,7 +20,8 @@ PP_SED		:= @echo '  SED   '
 CC =			$CC
 AR =			$AR
 
-CFLAGS = 		$NXT_CFLAGS $NXT_CC_OPT $CFLAGS
+EXTRA_CFLAGS =
+CFLAGS = 		$NXT_CFLAGS $NXT_CC_OPT $CFLAGS \$(EXTRA_CFLAGS)
 
 NXT_EXEC_LINK =		$NXT_EXEC_LINK $NXT_LD_OPT
 NXT_SHARED_LOCAL_LINK =	$NXT_SHARED_LOCAL_LINK $NXT_LD_OPT
@@ -548,6 +549,8 @@ help:
 	@echo "  make D=1 ...           - Enables debug builds (-O0)"
 	@echo "  make E=0 ...           - Disables -Werror"
 	@echo
+	@echo "  make EXTRA_CFLAGS= ... - Add extra compiler options"
+	@echo
 	@echo "  Variables can be combined."
 
 END