cmake: Set PNG_ARM_NEON to "on" by default on ARM64
Avoid build failures on all ARM64-based non-Linux systems.
PNG_ARM_NEON can be set to "check" on Linux/ARM32 only.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 42ff0f9..79d714b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
# CMakeLists.txt
-# Copyright (c) 2018-2020 Cosmin Truta
+# Copyright (c) 2018-2022 Cosmin Truta
# Copyright (c) 2007,2009-2018 Glenn Randers-Pehrson
# Written by Christian Ehrlicher, 2007
# Revised by Roger Lowman, 2009-2010
@@ -69,10 +69,17 @@
# Set definitions and sources for ARM.
if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm" OR
- CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64")
- set(PNG_ARM_NEON_POSSIBLE_VALUES check on off)
- set(PNG_ARM_NEON "check"
- CACHE STRING "Enable ARM NEON optimizations: check|on|off; check is default")
+ CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64")
+ if(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm64" OR
+ CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64")
+ set(PNG_ARM_NEON_POSSIBLE_VALUES on off)
+ set(PNG_ARM_NEON "on"
+ CACHE STRING "Enable ARM NEON optimizations: on|off; on is default")
+ else()
+ set(PNG_ARM_NEON_POSSIBLE_VALUES check on off)
+ set(PNG_ARM_NEON "check"
+ CACHE STRING "Enable ARM NEON optimizations: check|on|off; check is default")
+ endif()
set_property(CACHE PNG_ARM_NEON
PROPERTY STRINGS ${PNG_ARM_NEON_POSSIBLE_VALUES})
list(FIND PNG_ARM_NEON_POSSIBLE_VALUES ${PNG_ARM_NEON} index)
