From 7d5c8eb943f92a94b420568778d61e0bd6f7df43 Mon Sep 17 00:00:00 2001
From: claude-bot <claude@ancap.in.ua>
Date: Mon, 13 Jul 2026 12:40:01 +0000
Subject: Import xiph/opus @ 034c1b61a250457649d788bbf983b3f0fb63f02e

Snapshot for re3/reVC vendoring, per @lzcnt.
Source: https://github.com/xiph/opus (034c1b61a250457649d788bbf983b3f0fb63f02e).
---
 cmake/OpusConfig.cmake | 104 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 cmake/OpusConfig.cmake

(limited to 'cmake/OpusConfig.cmake')

diff --git a/cmake/OpusConfig.cmake b/cmake/OpusConfig.cmake
new file mode 100644
index 0000000..8d19a53
--- /dev/null
+++ b/cmake/OpusConfig.cmake
@@ -0,0 +1,104 @@
+if(__opus_config)
+  return()
+endif()
+set(__opus_config INCLUDED)
+
+include(OpusFunctions)
+
+configure_file(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)
+  set(FORTIFY_SOURCE_SUPPORTED 1)
+endif()
+
+if(MINGW)
+  # For MINGW we need to link ssp lib for security features such as
+  # stack protector and fortify_sources
+  check_library_exists(ssp __stack_chk_fail "" HAVE_LIBSSP)
+  if(NOT HAVE_LIBSSP)
+    message(WARNING "Could not find libssp in MinGW, disabling STACK_PROTECTOR and FORTIFY_SOURCE")
+    set(STACK_PROTECTOR_SUPPORTED 0)
+    set(FORTIFY_SOURCE_SUPPORTED 0)
+  endif()
+endif()
+
+if(NOT MSVC)
+  set(WARNING_LIST -Wall -W -Wstrict-prototypes -Wextra -Wcast-align -Wnested-externs -Wshadow)
+  include(CheckCCompilerFlag)
+  foreach(WARNING_FLAG ${WARNING_LIST})
+    string(REPLACE - "" WARNING_VAR ${WARNING_FLAG})
+    check_c_compiler_flag(${WARNING_FLAG} ${WARNING_VAR}_SUPPORTED)
+    if(${WARNING_VAR}_SUPPORTED)
+      add_compile_options(${WARNING_FLAG})
+    endif()
+  endforeach()
+endif()
-- 
cgit v1.2.3