Make.defs: Add "-Wextra" to default CFLAGS.

Add an option to enable "-Werror" also.

Signed-off-by: Björn Esser <[email protected]>

Author: besser82

ChangeLog

@@ -10,6 +10,9 @@
 	* pam_tcb/support.h (pam_tcb_getlogin): New function.
 	Small static inline wrapper around getlogin(3).
 
+	* Make.defs: Add "-Wextra" to default CFLAGS.  Add an option to
+	enable "-Werror" also.
+
 2021-09-25  Björn Esser  <besser82 at fedoraproject.org>
 
 	* pam_tcb/support.c (_set_ctrl): Request automatic prefix only if

Make.defs

@@ -2,11 +2,18 @@ CC = gcc
 INSTALL = install -p
 MKDIR = mkdir
 
+# Flag to enable -Werror on build.
+WERROR =
+
 DBGFLAG = #-ggdb
 ifndef CFLAGS
 CFLAGS = -O2
 endif
-CFLAGS += $(DBGFLAG) -I../include -Wall
+CFLAGS += $(DBGFLAG) -I../include
+CFLAGS += -Wall -Wextra
+ifneq ($(WERROR),)
+CFLAGS += -Werror
+endif
 #CFLAGS += -DFAIL_RECORD
 LDFLAGS += $(DBGFLAG) -L../libs