6 files changed, 21 insertions, 5 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f952ce0..5d89e4e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -159,6 +159,10 @@ target_compile_options(${PROJECT_NAME} PRIVATE
     -Wcast-align
     -Wshadow
     -Wlogical-op
+    -Os
+    -fno-builtin-printf
+    -fno-builtin-fprintf
+    -fno-builtin-_exit
 )
 
 target_link_options(${PROJECT_NAME} PRIVATE
diff --git a/third_party/newlib/string/local.h b/third_party/newlib/string/local.h
index a96bdf1..3c35e1a 100644
--- a/third_party/newlib/string/local.h
+++ b/third_party/newlib/string/local.h
@@ -4,9 +4,5 @@
    calls.  This is used to avoid recursive calls in memset and memmove
    default implementations.
 */
-#ifdef _HAVE_CC_INHIBIT_LOOP_TO_LIBCALL
-# define __inhibit_loop_to_libcall \
+#define __inhibit_loop_to_libcall \
   __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
-#else
-# define __inhibit_loop_to_libcall
-#endif
diff --git a/third_party/newlib/string/memcmp.c b/third_party/newlib/string/memcmp.c
index 342fb9f..4d47656 100644
--- a/third_party/newlib/string/memcmp.c
+++ b/third_party/newlib/string/memcmp.c
@@ -42,6 +42,10 @@ QUICKREF
 /* Threshhold for punting to the byte copier.  */
 #define TOO_SMALL(LEN)  ((LEN) < LBLOCKSIZE)
 
+#if defined(memcmp)
+#undef memcmp
+#endif
+
 int
 memcmp (const void *m1,
 	const void *m2,
diff --git a/third_party/newlib/string/memcpy.c b/third_party/newlib/string/memcpy.c
index 52f716b..fe8467c 100644
--- a/third_party/newlib/string/memcpy.c
+++ b/third_party/newlib/string/memcpy.c
@@ -44,6 +44,10 @@ QUICKREF
 /* Threshhold for punting to the byte copier.  */
 #define TOO_SMALL(LEN)  ((LEN) < BIGBLOCKSIZE)
 
+#if defined(memcpy)
+#undef memcpy
+#endif
+
 void *
 __inhibit_loop_to_libcall
 memcpy (void *__restrict dst0,
diff --git a/third_party/newlib/string/memmove.c b/third_party/newlib/string/memmove.c
index da5dfdb..fc6acf1 100644
--- a/third_party/newlib/string/memmove.c
+++ b/third_party/newlib/string/memmove.c
@@ -47,6 +47,10 @@ QUICKREF
 /* Threshhold for punting to the byte copier.  */
 #define TOO_SMALL(LEN)  ((LEN) < BIGBLOCKSIZE)
 
+#if defined(memmove)
+#undef memmove
+#endif
+
 /*SUPPRESS 20*/
 void *
 __inhibit_loop_to_libcall
diff --git a/third_party/newlib/string/memset.c b/third_party/newlib/string/memset.c
index e8e667a..8814b76 100644
--- a/third_party/newlib/string/memset.c
+++ b/third_party/newlib/string/memset.c
@@ -33,6 +33,10 @@ QUICKREF
 #define UNALIGNED(X)   ((long)X & (LBLOCKSIZE - 1))
 #define TOO_SMALL(LEN) ((LEN) < LBLOCKSIZE)
 
+#if defined(memset)
+#undef memset
+#endif
+
 void *
 __inhibit_loop_to_libcall
 memset (void *m,