Build: Support CMAKE_OSX_ARCHITECTURES
... as long as it contains only a singular value, which must equal
"x86_64" or "arm64".
Refer to #495
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 826d59f..21f868a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,6 +41,13 @@
# Detect CPU type and whether we're building 64-bit or 32-bit code
math(EXPR BITS "${CMAKE_SIZEOF_VOID_P} * 8")
string(TOLOWER ${CMAKE_SYSTEM_PROCESSOR} CMAKE_SYSTEM_PROCESSOR_LC)
+set(COUNT 1)
+foreach(ARCH ${CMAKE_OSX_ARCHITECTURES})
+ if(COUNT GREATER 1)
+ message(FATAL_ERROR "The libjpeg-turbo build system does not support multiple values in CMAKE_OSX_ARCHITECTURES.")
+ endif()
+ math(EXPR COUNT "${COUNT}+1")
+endforeach()
if(CMAKE_SYSTEM_PROCESSOR_LC MATCHES "x86_64" OR
CMAKE_SYSTEM_PROCESSOR_LC MATCHES "amd64" OR
CMAKE_SYSTEM_PROCESSOR_LC MATCHES "i[0-9]86" OR
@@ -67,6 +74,10 @@
else()
set(CPU_TYPE ${CMAKE_SYSTEM_PROCESSOR_LC})
endif()
+if(CMAKE_OSX_ARCHITECTURES MATCHES "x86_64" OR
+ CMAKE_OSX_ARCHITECTURES MATCHES "arm64")
+ set(CPU_TYPE ${CMAKE_OSX_ARCHITECTURES})
+endif()
if(MSVC_IDE AND CMAKE_GENERATOR_PLATFORM MATCHES "arm64")
set(CPU_TYPE arm64)
endif()
