CMake configure fails on arm MacOs

Open fumminger opened this issue 7 months ago • 1 comments
If I try to configure using CMake on an arm Mac, then the configure will fail. The sequence is:
OpusConfig.cmake will set OPUS_MAY_HAVE_NEON to ON.
OpusFunctions.cmake will set RUNTIME_CPU_CAPABILITY_DETECTION to 0.
CMakeLists.txt will complain that these are not compatible and fail with message(ERROR "Runtime cpu capability detection needed for MAY_HAVE_NEON")
Jun 30 '25 18:06 fumminger
cmake and make seems to work on Macbook M1 with macOS 13.7.8:
$ cmake .
-- Found Git: /opt/local/bin/git (found version "2.51.0")
fatal: No names found, cannot describe anything.
CMake Warning at cmake/OpusPackageVersion.cmake:61 (message):
  Could not get package version.
Call Stack (most recent call first):
  CMakeLists.txt:5 (get_package_version)


-- Opus project version: 0
-- The C compiler identification is AppleClang 14.0.0.14000029
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Setting build type to 'Release' as none was specified and no CFLAGS was exported.
-- Performing Test VLA_SUPPORTED
-- Performing Test VLA_SUPPORTED -- success
-- Looking for alloca.h
-- Looking for alloca.h - found
-- Looking for alloca
-- Looking for alloca - found
-- Looking for floor in m
-- Looking for floor in m - found
-- Looking for lrintf
-- Looking for lrintf - found
-- Looking for lrint
-- Looking for lrint - found
-- Looking for elf_aux_info
-- Looking for elf_aux_info - not found
-- Check NEON support by compiler
-- Looking for arm_neon.h
-- Looking for arm_neon.h - found
-- Performing Test FAST_MATH_SUPPORTED
-- Performing Test FAST_MATH_SUPPORTED - Success
-- Performing Test STACK_PROTECTOR_SUPPORTED
-- Performing Test STACK_PROTECTOR_SUPPORTED - Success
-- Performing Test HIDDEN_VISIBILITY_SUPPORTED
-- Performing Test HIDDEN_VISIBILITY_SUPPORTED - Success
-- Performing Test Wall_SUPPORTED
-- Performing Test Wall_SUPPORTED - Success
-- Performing Test W_SUPPORTED
-- Performing Test W_SUPPORTED - Success
-- Performing Test Wstrictprototypes_SUPPORTED
-- Performing Test Wstrictprototypes_SUPPORTED - Success
-- Performing Test Wextra_SUPPORTED
-- Performing Test Wextra_SUPPORTED - Success
-- Performing Test Wcastalign_SUPPORTED
-- Performing Test Wcastalign_SUPPORTED - Success
-- Performing Test Wnestedexterns_SUPPORTED
-- Performing Test Wnestedexterns_SUPPORTED - Success
-- Performing Test Wshadow_SUPPORTED
-- Performing Test Wshadow_SUPPORTED - Success
-- The following features have been enabled:

 * OPUS_ENABLE_FLOAT_API, compile with the floating point API (for machines with float library).
 * OPUS_HARDENING, run-time checks that are cheap and safe for use in production.
 * OPUS_INSTALL_PKG_CONFIG_MODULE, install pkg-config module.
 * OPUS_INSTALL_CMAKE_CONFIG_MODULE, install CMake package config module.
 * OPUS_VAR_ARRAYS, use variable length arrays for stack arrays.
 * OPUS_STACK_PROTECTOR, use stack protection.
 * OPUS_FORTIFY_SOURCE, add protection against buffer overflows.

-- The following OPTIONAL packages have been found:

 * Git

-- The following features have been disabled:

 * OPUS_BUILD_SHARED_LIBRARY, build shared library.
 * OPUS_BUILD_TESTING, build tests.
 * OPUS_CUSTOM_MODES, enable non-Opus modes, e.g. 44.1 kHz & 2^n frames.
 * OPUS_BUILD_PROGRAMS, build programs.
 * OPUS_DISABLE_INTRINSICS, disable all intrinsics optimizations.
 * OPUS_FIXED_POINT, compile as fixed-point (for machines without a fast enough FPU).
 * OPUS_FLOAT_APPROX, enable floating point approximations (Ensure your platform supports IEEE 754 before enabling).
 * OPUS_ASSERTIONS, additional software error checking.
 * OPUS_FUZZING, causes the encoder to make random decisions (do not use in production).
 * OPUS_CHECK_ASM, enable bit-exactness checks between optimized and c implementations.
 * OPUS_DNN_FLOAT_DEBUG, Run DNN computations as float for debugging purposes.
 * OPUS_DRED, enable DRED.
 * OPUS_OSCE, enable OSCE.
 * OPUS_BUILD_FRAMEWORK, build Framework bundle for Apple systems.
 * OPUS_FIXED_POINT_DEBUG, debug fixed-point implementation.
 * OPUS_USE_ALLOCA, use alloca for stack arrays (on non-C99 compilers).
 * OPUS_NONTHREADSAFE_PSEUDOSTACK, use a non threadsafe pseudostack when neither variable length arrays or alloca is supported.
 * OPUS_FAST_MATH, enable fast math (unsupported and discouraged use, as code is not well tested with this build option).

ERRORRuntime cpu capability detection needed for MAY_HAVE_NEON
-- Configuring done (2.9s)
-- Generating done (0.0s)
-- Build files have been written to: /Users/alfredh/tmp/opus


$ make
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/Users/alfredh/tmp/opus/src/extensions.c:504:18: warning: variable 'trailing_short_len' set but not used [-Wunused-but-set-variable]
      opus_int32 trailing_short_len;
                 ^
1 warning generated.
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Sep 16 '25 07:09 alfredh