Add SIGNALSMITH_USE_... CMake options

Author: geraintluff

CMakeLists.txt

@@ -30,16 +30,24 @@ endif()
 ##	target_compile_definitions(fft2 INTERFACE SIGNALSMITH_USE_CBLAS)
 #endif()
 
-if(WIN32)
-	find_package(IPP)
+option(SIGNALSMITH_USE_AVAILABLE "use whatever useful dependencies (e.g. IPP) can be found" ON)
+option(SIGNALSMITH_USE_ACCELERATE "always use the Accelerate framework for Apple targets (OSX/iOS)" ON)
+option(SIGNALSMITH_USE_IPP "always use IPP (Intel Performance Primitives)" OFF)
+
+if(SIGNALSMITH_USE_AVAILABLE)
+	find_package(IPP QUIET)
 	if(IPP_FOUND)
-		message(STATUS "using IPP")
-		target_link_libraries(signalsmith-linear INTERFACE IPP::ippcore IPP::ipps IPP::ippi)
-		target_compile_definitions(signalsmith-linear INTERFACE SIGNALSMITH_USE_IPP)
+		set(SIGNALSMITH_USE_IPP BOOLEAN ON)
 	endif()
-elseif(APPLE)
-	#find_library(Accelerate_LIBRARY NAMES Accelerate)
+endif()
+
+if(APPLE AND SIGNALSMITH_USE_ACCELERATE)
 	message(STATUS "using Accelerate")
 	target_link_libraries(signalsmith-linear INTERFACE "-framework Accelerate" "cblas")
 	target_compile_definitions(signalsmith-linear INTERFACE SIGNALSMITH_USE_ACCELERATE ACCELERATE_NEW_LAPACK)
-endif()
+elseif(SIGNALSMITH_USE_IPP)
+	find_package(IPP REQUIRED)
+	message(STATUS "using IPP")
+	target_link_libraries(signalsmith-linear INTERFACE IPP::ippcore IPP::ipps IPP::ippi)
+	target_compile_definitions(signalsmith-linear INTERFACE SIGNALSMITH_USE_IPP)
+endif()

tests/CMakeLists.txt

@@ -24,7 +24,7 @@ FetchContent_MakeAvailable(signalsmith_dsp)
 FetchContent_Declare(
 	signalsmith_plot
 	GIT_REPOSITORY https://github.com/Signalsmith-Audio/plot.git
-	GIT_TAG e53eb933ae0de8bb8acd54b3e96a8bed6a708a2a # main
+	GIT_TAG 1.0.0
 	GIT_SHALLOW ON
 	SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/plot"
 )