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-rw-r--r--gcc/Makefile2
-rwxr-xr-xgcc/toplev.c1
2 files changed, 2 insertions, 1 deletions
diff --git a/gcc/Makefile b/gcc/Makefile
index c30991a..9756e90 100644
--- a/gcc/Makefile
+++ b/gcc/Makefile
@@ -24,7 +24,7 @@ VPATH = $(srcdir)
CC = gcc
-BASE_CFLAGS = -g -std=gnu11
+BASE_CFLAGS = -g -std=gnu11 -Werror-implicit-function-declaration
INCLUDES = -I. -I$(srcdir)
diff --git a/gcc/toplev.c b/gcc/toplev.c
index 10d8508..e80ed20 100755
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -40,6 +40,7 @@
#include "except.h"
#include "toplev.h"
#include "expr.h"
+#include "unistd.h"
#if defined (DWARF2_DEBUGGING_INFO)
#include "dwarf2out.h"