1 files changed, 80 insertions, 0 deletions
diff --git a/cmake/OpusConfig.cmake b/cmake/OpusConfig.cmake
new file mode 100644
index 00000000..63054617
--- /dev/null
+++ b/cmake/OpusConfig.cmake
@@ -0,0 +1,80 @@
+if(__opus_config)
+  return()
+endif()
+set(__opus_config INCLUDED)
+
+include(OpusFunctions)
+
+configure_file(${CMAKE_SOURCE_DIR}/cmake/config.h.cmake.in config.h @ONLY)
+add_definitions(-DHAVE_CONFIG_H)
+
+set_property(GLOBAL PROPERTY USE_FOLDERS ON)
+set_property(GLOBAL PROPERTY C_STANDARD 99)
+
+if(MSVC)
+  add_definitions(-D_CRT_SECURE_NO_WARNINGS)
+endif()
+
+include(CheckLibraryExists)
+check_library_exists(m floor "" HAVE_LIBM)
+if(HAVE_LIBM)
+  list(APPEND OPUS_REQUIRED_LIBRARIES m)
+endif()
+
+include(CFeatureCheck)
+c_feature_check(VLA)
+
+include(CheckIncludeFile)
+check_include_file(alloca.h HAVE_ALLOCA_H)
+
+include(CheckSymbolExists)
+if(HAVE_ALLOCA_H)
+  add_definitions(-DHAVE_ALLOCA_H)
+  check_symbol_exists(alloca "alloca.h" USE_ALLOCA_SUPPORTED)
+else()
+  check_symbol_exists(alloca "stdlib.h;malloc.h" USE_ALLOCA_SUPPORTED)
+endif()
+
+include(CheckFunctionExists)
+check_function_exists(lrintf HAVE_LRINTF)
+check_function_exists(lrint HAVE_LRINT)
+
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "(i[0-9]86|x86|X86|amd64|AMD64|x86_64)")
+  if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+    set(OPUS_CPU_X64 1)
+  else()
+    set(OPUS_CPU_X86 1)
+  endif()
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "(arm|aarch64)")
+  set(OPUS_CPU_ARM 1)
+endif()
+
+if(NOT OPUS_DISABLE_INTRINSICS)
+  opus_supports_cpu_detection(RUNTIME_CPU_CAPABILITY_DETECTION)
+endif()
+
+if(OPUS_CPU_X86 OR OPUS_CPU_X64 AND NOT OPUS_DISABLE_INTRINSICS)
+  opus_detect_sse(COMPILER_SUPPORT_SIMD)
+elseif(OPUS_CPU_ARM AND NOT OPUS_DISABLE_INTRINSICS)
+  opus_detect_neon(COMPILER_SUPPORT_NEON)
+  if(COMPILER_SUPPORT_NEON)
+    option(OPUS_USE_NEON "Option to enable NEON" ON)
+    option(OPUS_MAY_HAVE_NEON "Does runtime check for neon support" ON)
+    option(OPUS_PRESUME_NEON "Assume target CPU has NEON support" OFF)
+    if(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64")
+      set(OPUS_PRESUME_NEON ON)
+    elseif(CMAKE_SYSTEM_NAME MATCHES "iOS")
+      set(OPUS_PRESUME_NEON ON)
+    endif()
+  endif()
+endif()
+
+if(MSVC)
+  check_flag(FAST_MATH /fp:fast)
+  check_flag(STACK_PROTECTOR /GS)
+  check_flag(STACK_PROTECTOR_DISABLED /GS-)
+else()
+  check_flag(FAST_MATH -ffast-math)
+  check_flag(STACK_PROTECTOR -fstack-protector-strong)
+  check_flag(HIDDEN_VISIBILITY -fvisibility=hidden)
+endif()