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-rw-r--r--png/CMakeLists.txt4
1 files changed, 3 insertions, 1 deletions
diff --git a/png/CMakeLists.txt b/png/CMakeLists.txt
index 597f996e7..faf7062a9 100644
--- a/png/CMakeLists.txt
+++ b/png/CMakeLists.txt
@@ -1,7 +1,7 @@
#
# PNG library CMake configuration for the Fast Light Toolkit (FLTK).
#
-# Copyright 1998-2020 by Bill Spitzak and others.
+# Copyright 1998-2021 by Bill Spitzak and others.
#
# This library is free software. Distribution and use rights are outlined in
# the file "COPYING" which should have been included with this file. If this
@@ -31,6 +31,8 @@ set(PNG_SRCS
pngwrite.c
pngwtran.c
pngwutil.c
+
+ # build on ARM (Apple M1 systems)
arm/arm_init.c
arm/filter_neon_intrinsics.c
arm/palette_neon_intrinsics.c