JPEGXL_STATIC fails to build on Fedora 40

[awused]

Describe the bug
cmake -DJPEGXL_STATIC=on fails on Fedora 40.

Output

-- The C compiler identification is GNU 14.0.1
-- The CXX compiler identification is GNU 14.0.1
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- CMAKE_SYSTEM_PROCESSOR is x86_64
-- Performing Test CXX_FUZZERS_SUPPORTED
-- Performing Test CXX_FUZZERS_SUPPORTED - Failed
-- Performing Test CXX_MACRO_PREFIX_MAP
-- Performing Test CXX_MACRO_PREFIX_MAP - Success
-- Performing Test CXX_NO_RTTI_SUPPORTED
-- Performing Test CXX_NO_RTTI_SUPPORTED - Success
-- Found PkgConfig: /usr/bin/pkg-config (found version "2.1.0") 
-- tcmalloc version  -- tcmalloc 2.8.0 disabled due to https://github.com/gperftools/gperftools/issues/1204
-- Performing Test JXL_HWY_DISABLED_TARGETS_FORCED
-- Performing Test JXL_HWY_DISABLED_TARGETS_FORCED - Failed
-- Compiled IDs C:GNU, C++:GNU
-- Disabled AVX512 (set JPEGXL_ENABLE_AVX512 to enable it)
-- Disabled AVX512_SPR (set JPEGXL_ENABLE_AVX512_SPR to enable it)
-- Disabled AVX512_ZEN4 (set JPEGXL_ENABLE_AVX512_ZEN4 to enable it)
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Check if compiler accepts -pthread
-- Check if compiler accepts -pthread - no
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - not found
CMake Error at /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find Threads (missing: Threads_FOUND)
Call Stack (most recent call first):
  /usr/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:600 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake/Modules/FindThreads.cmake:226 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  CMakeLists.txt:225 (find_package)


-- Configuring incomplete, errors occurred!

Environment

• OS: Fedora 40
• Compiler version: GCC 14, Clang 18, Clang 15
• CPU type: x86_64

Additional context
The dynamic libraries and executables build without issue. There have been some recent header changes so maybe it's https://gcc.gnu.org/gcc-14/porting_to.html#header-dep-changes ?