FEX Emu fails to build on Alpine Linux aarch64

[merll002]

Upon following the official build instructions and building with ninja, I am met with the following errors:

localhost:~/FEX/Build# ninja
[1/2] Re-checking globbed directories...
[1/393] Building CXX object FEXCore/Source/CMakeFiles/JemallocDummy.dir/Utils/AllocatorHooks.cpp.o
[2/393] Building CXX object FEXCore/Source/CMakeFiles/JemallocLibs.dir/Utils/AllocatorHooks.cpp.o
[3/393] Generating ../../IR.md
[4/393] Generating ../../include/FEXCore/IR/IRDefines.inc, ../../include/FEXCore/IR/IRDefines_Dispatch.inc
[5/393] Generating ../../include/FEXCore/Config/ConfigValues.inl, ../../include/FEXCore/Config/ConfigOptions.inl, ../../generated/FEX.1
[6/393] Building C object External/cephes/CMakeFiles/cephes_128bit.dir/src/128bit/tanll.c.o
[7/393] Building C object External/cephes/CMakeFiles/cephes_128bit.dir/src/128bit/sinll.c.o
[8/393] Building C object External/cephes/CMakeFiles/cephes_128bit.dir/src/128bit/polevll.c.o
[9/393] Building C object External/cephes/CMakeFiles/cephes_128bit.dir/src/128bit/mtherr.c.o
[10/393] Building C object External/cephes/CMakeFiles/cephes_128bit.dir/src/128bit/log2ll.c.o
[11/393] Building C object External/cephes/CMakeFiles/cephes_128bit.dir/src/128bit/floorll.c.o
[12/393] Building C object External/cephes/CMakeFiles/cephes_128bit.dir/src/128bit/exp2ll.c.o
[13/393] Building C object External/cephes/CMakeFiles/cephes_128bit.dir/src/128bit/constll.c.o
[14/393] Building C object External/cephes/CMakeFiles/cephes_128bit.dir/src/128bit/atanll.c.o
[15/393] Building CXX object External/cephes/CMakeFiles/cephes_128bit.dir/src/128bit/Impl.cpp.o
[16/393] Generating ../../generated/FEX.1.gz
[17/393] Building C object External/SoftFloat-3e/CMakeFiles/softfloat_3e.dir/src/s_f32UIToCommonNaN.c.o
ninja: job failed: /usr/bin/clang++ -DFEX_HAS_PRESERVE_ALL_ATTR=1 -DFEX_PRESERVE_ALL_ATTR="__attribute__((preserve_all))" -DGLOBAL_DATA_DIRECTORY=\"/usr/share/fex-emu/\" -D_M_ARM_64=1 -I/root/FEX/Build/FEXCore/Source -I/root/FEX/FEXCore/Source -I/root/FEX/External/robin-map/include -I/root/FEX/External/tiny-json -I/root/FEX/Source -I/root/FEX/Build/Source -I/root/FEX/Build/generated -I/root/FEX/FEXCore/include -O3 -DNDEBUG -fomit-frame-pointer -std=gnu++20 -flto=thin -fPIC   -Wno-trigraphs -fdiagnostics-color=always -fcolor-diagnostics -Wno-deprecated-enum-enum-conversion -Wall -fno-strict-aliasing -fno-exceptions -MD -MT FEXCore/Source/CMakeFiles/JemallocDummy.dir/Utils/AllocatorHooks.cpp.o -MF FEXCore/Source/CMakeFiles/JemallocDummy.dir/Utils/AllocatorHooks.cpp.o.d -o FEXCore/Source/CMakeFiles/JemallocDummy.dir/Utils/AllocatorHooks.cpp.o -c /root/FEX/FEXCore/Source/Utils/AllocatorHooks.cpp
/root/FEX/FEXCore/Source/Utils/AllocatorHooks.cpp:12:90: error: unknown type name 'off_t'
   12 | using mmap_hook_type = void* (*)(void* addr, size_t length, int prot, int flags, int fd, off_t offset);
      |                                                                                          ^
1 error generated.
ninja: job failed: /usr/bin/clang++ -DENABLE_JEMALLOC=1 -DFEX_HAS_PRESERVE_ALL_ATTR=1 -DFEX_PRESERVE_ALL_ATTR="__attribute__((preserve_all))" -DGLOBAL_DATA_DIRECTORY=\"/usr/share/fex-emu/\" -DJEMALLOC_NO_RENAME=1 -D_M_ARM_64=1 -I/root/FEX/Build/FEXCore/Source -I/root/FEX/FEXCore/Source -I/root/FEX/External/robin-map/include -I/root/FEX/External/tiny-json -I/root/FEX/Source -I/root/FEX/Build/Source -I/root/FEX/Build/generated -I/root/FEX/External/jemalloc/include -I/root/FEX/External/jemalloc/pregen/include -I/root/FEX/Build/External/jemalloc/include -O3 -DNDEBUG -fomit-frame-pointer -std=gnu++20 -flto=thin -fPIC   -Wno-trigraphs -fdiagnostics-color=always -fcolor-diagnostics -Wno-deprecated-enum-enum-conversion -Wall -fno-strict-aliasing -fno-exceptions -MD -MT FEXCore/Source/CMakeFiles/JemallocLibs.dir/Utils/AllocatorHooks.cpp.o -MF FEXCore/Source/CMakeFiles/JemallocLibs.dir/Utils/AllocatorHooks.cpp.o.d -o FEXCore/Source/CMakeFiles/JemallocLibs.dir/Utils/AllocatorHooks.cpp.o -c /root/FEX/FEXCore/Source/Utils/AllocatorHooks.cpp
/root/FEX/FEXCore/Source/Utils/AllocatorHooks.cpp:12:90: error: unknown type name 'off_t'
   12 | using mmap_hook_type = void* (*)(void* addr, size_t length, int prot, int flags, int fd, off_t offset);
      |                                                                                          ^
1 error generated.
ninja: subcommands failed

[merll002]

Running ninja again with no changes returns:

localhost:~/FEX/Build# ninja
[1/2] Re-checking globbed directories...
[1/378] Building CXX object Source/Tools/pidof/CMakeFiles/FEXpidof.dir/pidof.cpp.o
[2/378] Building CXX object Source/Tools/FEXInterpreter/CMakeFiles/FEX.dir/AOT/AOTGenerator.cpp.o
[3/378] Building CXX object Source/Tools/FEXInterpreter/CMakeFiles/FEX.dir/FEXInterpreter.cpp.o
[4/378] Building CXX object Source/Tools/CodeSizeValidation/CMakeFiles/CodeSizeValidation.dir/Main.cpp.o
[5/378] Building CXX object Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/Stubs.cpp.o
[6/378] Building CXX object Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/NotImplemented.cpp.o
[7/378] Building CXX object Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/Timer.cpp.o
[8/378] Building CXX object Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/Thread.cpp.o
[9/378] Building CXX object Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/Signals.cpp.o
[10/378] Building CXX object Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/Memory.cpp.o
ninja: job failed: /usr/bin/clang++ -DFEXCORE_HAS_PRESERVE_ALL_ATTR=1 -DFEXCORE_PRESERVE_ALL_ATTR="__attribute__((preserve_all))" -DFEX_HAS_PRESERVE_ALL_ATTR=1 -DFEX_PRESERVE_ALL_ATTR="__attribute__((preserve_all))" -DGLOBAL_DATA_DIRECTORY=\"/usr/share/fex-emu/\" -DHAS_SYSCALL_GETTID=1 -DHAS_SYSCALL_STATX=1 -DINLINE="static inline" -DINLINE_LEVEL=4 -DRANGES_DISABLE_DEPRECATED_WARNINGS -DSOFTFLOAT_BUILTIN_CLZ=1 -DSOFTFLOAT_FAST_DIV32TO16=1 -DSOFTFLOAT_FAST_DIV64TO32=1 -DSOFTFLOAT_FAST_INT64=1 -D_M_ARM_64=1 -I/root/FEX/Build/Source/Tools/LinuxEmulation -I/root/FEX/Source/Tools/LinuxEmulation -I/root/FEX/External/robin-map/include -I/root/FEX/External/tiny-json -I/root/FEX/Source -I/root/FEX/Build/Source -I/root/FEX/Build/generated -I/root/FEX/External/drm-headers/include -I/root/FEX/Build/FEXCore/Source -I/root/FEX/FEXCore/include -I/root/FEX/Build/include -I/root/FEX/External/fmt/include -I/root/FEX/External/xxhash/cmake_unofficial/.. -I/root/FEX/FEXHeaderUtils/. -I/root/FEX/CodeEmitter/. -I/root/FEX/External/cephes/include -I/root/FEX/External/SoftFloat-3e/include -I/root/FEX/External/SoftFloat-3e/include/SoftFloat-3e -I/root/FEX/Source/Common/cpp-optparse -I/root/FEX/External/range-v3/include -I/root/FEX/Source/Tools/CommonTools -O3 -DNDEBUG -fomit-frame-pointer -std=gnu++20 -flto=thin -fPIC -fvisibility=hidden -fvisibility-inlines-hidden   -Wno-trigraphs -fdiagnostics-color=always -fcolor-diagnostics -Wno-deprecated-enum-enum-conversion -Wall -fno-strict-aliasing -fno-operator-names -Werror=cast-qual -Werror=ignored-qualifiers -Werror=implicit-fallthrough -Wno-trigraphs -fwrapv -MD -MT Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/Signals.cpp.o -MF Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/Signals.cpp.o.d -o Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/Signals.cpp.o -c /root/FEX/Source/Tools/LinuxEmulation/LinuxSyscalls/Syscalls/Signals.cpp
In file included from /root/FEX/Source/Tools/LinuxEmulation/LinuxSyscalls/Syscalls/Signals.cpp:9:
In file included from /root/FEX/Source/Tools/LinuxEmulation/LinuxSyscalls/Syscalls.h:14:
/root/FEX/Source/Tools/LinuxEmulation/LinuxSyscalls/ThreadManager.h:32:10: fatal error: 'bits/types/sigset_t.h' file not found
   32 | #include <bits/types/sigset_t.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
ninja: job failed: /usr/bin/clang++ -DFEXCORE_HAS_PRESERVE_ALL_ATTR=1 -DFEXCORE_PRESERVE_ALL_ATTR="__attribute__((preserve_all))" -DFEX_HAS_PRESERVE_ALL_ATTR=1 -DFEX_PRESERVE_ALL_ATTR="__attribute__((preserve_all))" -DGLOBAL_DATA_DIRECTORY=\"/usr/share/fex-emu/\" -DHAS_SYSCALL_GETTID=1 -DHAS_SYSCALL_STATX=1 -DINLINE="static inline" -DINLINE_LEVEL=4 -DRANGES_DISABLE_DEPRECATED_WARNINGS -DSOFTFLOAT_BUILTIN_CLZ=1 -DSOFTFLOAT_FAST_DIV32TO16=1 -DSOFTFLOAT_FAST_DIV64TO32=1 -DSOFTFLOAT_FAST_INT64=1 -D_M_ARM_64=1 -I/root/FEX/Build/Source/Tools/LinuxEmulation -I/root/FEX/Source/Tools/LinuxEmulation -I/root/FEX/External/robin-map/include -I/root/FEX/External/tiny-json -I/root/FEX/Source -I/root/FEX/Build/Source -I/root/FEX/Build/generated -I/root/FEX/External/drm-headers/include -I/root/FEX/Build/FEXCore/Source -I/root/FEX/FEXCore/include -I/root/FEX/Build/include -I/root/FEX/External/fmt/include -I/root/FEX/External/xxhash/cmake_unofficial/.. -I/root/FEX/FEXHeaderUtils/. -I/root/FEX/CodeEmitter/. -I/root/FEX/External/cephes/include -I/root/FEX/External/SoftFloat-3e/include -I/root/FEX/External/SoftFloat-3e/include/SoftFloat-3e -I/root/FEX/Source/Common/cpp-optparse -I/root/FEX/External/range-v3/include -I/root/FEX/Source/Tools/CommonTools -O3 -DNDEBUG -fomit-frame-pointer -std=gnu++20 -flto=thin -fPIC -fvisibility=hidden -fvisibility-inlines-hidden   -Wno-trigraphs -fdiagnostics-color=always -fcolor-diagnostics -Wno-deprecated-enum-enum-conversion -Wall -fno-strict-aliasing -fno-operator-names -Werror=cast-qual -Werror=ignored-qualifiers -Werror=implicit-fallthrough -Wno-trigraphs -fwrapv -MD -MT Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/NotImplemented.cpp.o -MF Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/NotImplemented.cpp.o.d -o Source/Tools/LinuxEmulation/CMakeFiles/LinuxEmulation.dir/LinuxSyscalls/Syscalls/NotImplemented.cpp.o -c /root/FEX/Source/Tools/LinuxEmulation/LinuxSyscalls/Syscalls/NotImplemented.cpp
In file included from /root/FEX/Source/Tools/LinuxEmulation/LinuxSyscalls/Syscalls/NotImplemented.cpp:9:
In file included from /root/FEX/Source/Tools/LinuxEmulation/LinuxSyscalls/Syscalls.h:14:
/root/FEX/Source/Tools/LinuxEmulation/LinuxSyscalls/ThreadManager.h:32:10: fatal error: 'bits/types/sigset_t.h' file not found
   32 | #include <bits/types/sigset_t.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

Error repeats multiple times...

[Sonicadvance1]

Took a peek at this but there are significantly more compile problems than just the things described here. Supporting building on Alpine will take some significant work.

[pmatos]

@merll002 I had something lying around for awhile when I did some experiments with FEX inside docker. I cleaned it up today and I managed to compile FEX inside Docker with Alpine. I pushed it to https://github.com/pmatos/FEX/tree/feat/Alpine in case you want to try it out.

[merll002]

@pmatos Awesome! Will try now...

[merll002]

@pmatos Hmm, got an error near the end:

/root/FEX/External/jemalloc/src/malloc_io.c:100:8: error: incompatible integer to pointer conversion initializing 'char *' with an expression of type 'int' [-Wint-conversion]
  100 |         char *b = strerror_r(err, buf, buflen);
      |               ^   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.                                    ninja: subcommand failed

[pmatos]

@pmatos Hmm, got an error near the end:

/root/FEX/External/jemalloc/src/malloc_io.c:100:8: error: incompatible integer to pointer conversion initializing 'char *' with an expression of type 'int' [-Wint-conversion]
  100 |         char *b = strerror_r(err, buf, buflen);
      |               ^   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.                                    ninja: subcommand failed

How are you calling cmake to configure the project?

[merll002]

CC=clang CXX=clang++ cmake -DC MAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release -D USE_LINKER=lld -DENABLE_LTO=True -DBUILD_TESTING=False -DENABLE_ASSERTIONS=False -G Ninja ..

[Sonicadvance1]

This just looks like our pre-generated jemalloc headers is expecting one function declaration type versus what Alpine wants.
We would probably need to actually generate these headers at cmake configuration time rather than pre-generated.

[pmatos]

CC=clang CXX=clang++ cmake -DC MAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release -D USE_LINKER=lld -DENABLE_LTO=True -DBUILD_TESTING=False -DENABLE_ASSERTIONS=False -G Ninja ..

Ah ok. Try:

  cmake -B build -G Ninja \
      -DCMAKE_BUILD_TYPE=Release \
      -DENABLE_JEMALLOC=FALSE \
      -DENABLE_JEMALLOC_GLIBC_ALLOC=FALSE \
      -DBUILD_TESTS=TRUE

This is enough to compile and pass asm_tests but I am not sure how / if it will work in practice.

[Sonicadvance1]

With the JEMallocs disabled, it'll break thunks and 32-bit applications. But if you don't care about that then yolo.

[merll002]

After compiling with ninja I get: cc: error: unrecognized command-line option '-fcolor-diagnostics'
I guess it's just too good to be true!

[pmatos]

After compiling with ninja I get: cc: error: unrecognized command-line option '-fcolor-diagnostics'
I guess it's just too good to be true!

I can compile it here. Can you paste your cmake output?

[merll002]

Sorry about the weird formatting...

cmake -B build -G Ninja \ > -DCMAKE_BUILD_TYPE=Release \ > -DENABLE_JEMALLOC=FALSE \ > -DENABLE_JEMALLOC_GLIBC_ALLOC=FALSE \ > -DBUILD_TESTS=TRUE .. -- The C compiler identification is GNU 14.2.0 -- The CXX compiler identification is Clang 19.1.4 -- The ASM compiler identification is GNU -- Found assembler: /usr/bin/cc -- 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/clang++ - skipped -- Detecting CXX compile features -- Detecting CXX compile features - done -- Looking for include file gdb/jit-reader.h -- Looking for include file gdb/jit-reader.h - not found -- Clang version 19.1.4 -- Performing Test HAS_CLANG_PRESERVE_ALL -- Performing Test HAS_CLANG_PRESERVE_ALL - Success -- Has clang::preserve_all -- jemalloc glibc allocator disabled! This is not a recommended configuration! This will very explicitly break thunk execution! Use at your own risk! -- jemalloc disabled! This is not a recommended configuration! This will very explicitly break 32-bit application execution! Use at your own risk! -- Performing Test ENUM_ENUM_WARNING -- Performing Test ENUM_ENUM_WARNING - Success -- Found PkgConfig: /usr/bin/pkg-config (found version "2.3.0") -- Found Python: /usr/bin/python3.12 (found suitable version "3.12.12", minimum required is "3.9") found components: Interpreter -- Checking for one of the modules 'xxhash;libxxhash' -- xxHash build type: RELEASE -- Architecture: aarch64 -- Performing Test HAVE_FLAG__ffile_prefix_map__root_FEX_External_Catch2__ -- Performing Test HAVE_FLAG__ffile_prefix_map__root_FEX_External_Catch2__ - Success -- {fmt} version: 12.1.0 -- Build type: RELEASE -- Performing Test HAS_NULLPTR_WARNING -- Performing Test HAS_NULLPTR_WARNING - Success CMake Deprecation Warning at External/range-v3/CMakeLists.txt:8 (cmake_minimum_required): Compatibility with CMake < 3.10 will be removed from a future version of CMake. Update the VERSION argument value. Or, use the ... syntax to tell CMake that the project requires at least but has been updated to work with policies introduced by or earlier. CMake Warning at External/range-v3/cmake/ranges_env.cmake:92 (message): [range-v3 warning]: unknown build type, defaults to release! Call Stack (most recent call first): External/range-v3/CMakeLists.txt:24 (include) -- Found Git: /usr/bin/git (found version "2.47.3") -- [range-v3]: C++ std=2a -- Performing Test RANGES_HAS_CXXSTD -- Performing Test RANGES_HAS_CXXSTD - Success -- Performing Test RANGES_HAS_WALL -- Performing Test RANGES_HAS_WALL - Success -- Performing Test RANGES_HAS_WEXTRA -- Performing Test RANGES_HAS_WEXTRA - Success -- Performing Test RANGES_HAS_WERROR -- Performing Test RANGES_HAS_WERROR - Success -- Performing Test RANGES_HAS_D__EXTERN_ALWAYS_INLINE -- Performing Test RANGES_HAS_D__EXTERN_ALWAYS_INLINE - Success -- Performing Test RANGES_HAS_FDIAGNOSTIC_SHOW_TEMPLATE_TREE -- Performing Test RANGES_HAS_FDIAGNOSTIC_SHOW_TEMPLATE_TREE - Success -- Performing Test RANGES_HAS_FTEMPLATE_BACKTRACE_LIMIT -- Performing Test RANGES_HAS_FTEMPLATE_BACKTRACE_LIMIT - Success -- Performing Test RANGES_HAS_FMACRO_BACKTRACE_LIMIT -- Performing Test RANGES_HAS_FMACRO_BACKTRACE_LIMIT - Success -- Performing Test RANGES_HAS_OMIT_FRAME_POINTER -- Performing Test RANGES_HAS_OMIT_FRAME_POINTER - Success -- Performing Test RANGES_HAS_OFAST -- Performing Test RANGES_HAS_OFAST - Success -- Performing Test RANGES_HAS_STRICT_ALIASING -- Performing Test RANGES_HAS_STRICT_ALIASING - Success -- Performing Test RANGES_HAS_STRICT_VTABLE_POINTERS -- Performing Test RANGES_HAS_STRICT_VTABLE_POINTERS - Success -- Performing Test RANGES_HAS_FAST_MATH -- Performing Test RANGES_HAS_FAST_MATH - Success -- Performing Test RANGES_HAS_VECTORIZE -- Performing Test RANGES_HAS_VECTORIZE - Success -- Performing Test RANGES_HAS_SIZED_DEALLOCATION -- Performing Test RANGES_HAS_SIZED_DEALLOCATION - Success -- Performing Test RANGES_HAS_MARCH_NATIVE -- Performing Test RANGES_HAS_MARCH_NATIVE - Success -- Performing Test RANGES_HAS_MTUNE_NATIVE -- Performing Test RANGES_HAS_MTUNE_NATIVE - Success -- Performing Test RANGE_V3_ALIGNED_NEW_PROBE -- Performing Test RANGE_V3_ALIGNED_NEW_PROBE - Success -- Performing Test RANGES_HAS_FCOROUTINES_TS -- Performing Test RANGES_HAS_FCOROUTINES_TS - Failed -- Performing Test RANGE_V3_HAS_FCONCEPTS -- Performing Test RANGE_V3_HAS_FCONCEPTS - Failed -- Performing Test GCC_COLOR -- Performing Test GCC_COLOR - Success -- Performing Test CLANG_COLOR -- Performing Test CLANG_COLOR - Success -- Performing Test COMPILER_SUPPORTS_CPU_TYPE -- Performing Test COMPILER_SUPPORTS_CPU_TYPE - Success -- Unit tests are enabled -- Performing Test HAS_SYSCALL_GETCPU -- Performing Test HAS_SYSCALL_GETCPU - Failed -- Performing Test HAS_SYSCALL_GETTID -- Performing Test HAS_SYSCALL_GETTID - Success -- Has gettid helper -- Performing Test HAS_SYSCALL_TGKILL -- Performing Test HAS_SYSCALL_TGKILL - Failed
-- Performing Test HAS_SYSCALL_STATX -- Performing Test HAS_SYSCALL_STATX - Success -- Has statx helper -- Performing Test HAS_SYSCALL_RENAMEAT2 -- Performing Test HAS_SYSCALL_RENAMEAT2 - Failed -- The ASM_NASM compiler identification is NASM -- Found assembler: /usr/bin/nasm -- Configuring done (54.1s) -- Generating done (3.3s) CMake Warning: Manually-specified variables were not used by the project: BUILD_TESTS -- Build files have been written to: /root/FEX/Build/build

[pmatos]

Sorry about the weird formatting...

cmake -B build -G Ninja \ > -DCMAKE_BUILD_TYPE=Release \ > -DENABLE_JEMALLOC=FALSE \ > -DENABLE_JEMALLOC_GLIBC_ALLOC=FALSE \ > -DBUILD_TESTS=TRUE .. -- The C compiler identification is GNU 14.2.0 -- The CXX compiler identification is Clang 19.1.4 -- The ASM compiler identification is GNU -- Found assembler: /usr/bin/cc -- 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/clang++ - skipped -- Detecting CXX compile features -- Detecting CXX compile features - done -- Looking for include file gdb/jit-reader.h -- Looking for include file gdb/jit-reader.h - not found -- Clang version 19.1.4 -- Performing Test HAS_CLANG_PRESERVE_ALL -- Performing Test HAS_CLANG_PRESERVE_ALL - Success -- Has clang::preserve_all -- jemalloc glibc allocator disabled! This is not a recommended configuration! This will very explicitly break thunk execution! Use at your own risk! -- jemalloc disabled! This is not a recommended configuration! This will very explicitly break 32-bit application execution! Use at your own risk! -- Performing Test ENUM_ENUM_WARNING -- Performing Test ENUM_ENUM_WARNING - Success -- Found PkgConfig: /usr/bin/pkg-config (found version "2.3.0") -- Found Python: /usr/bin/python3.12 (found suitable version "3.12.12", minimum required is "3.9") found components: Interpreter -- Checking for one of the modules 'xxhash;libxxhash' -- xxHash build type: RELEASE -- Architecture: aarch64 -- Performing Test HAVE_FLAG__ffile_prefix_map__root_FEX_External_Catch2__ -- Performing Test HAVE_FLAG__ffile_prefix_map__root_FEX_External_Catch2__ - Success -- {fmt} version: 12.1.0 -- Build type: RELEASE -- Performing Test HAS_NULLPTR_WARNING -- Performing Test HAS_NULLPTR_WARNING - Success CMake Deprecation Warning at External/range-v3/CMakeLists.txt:8 (cmake_minimum_required): Compatibility with CMake < 3.10 will be removed from a future version of CMake. Update the VERSION argument value. Or, use the ... syntax to tell CMake that the project requires at least but has been updated to work with policies introduced by or earlier. CMake Warning at External/range-v3/cmake/ranges_env.cmake:92 (message): [range-v3 warning]: unknown build type, defaults to release! Call Stack (most recent call first): External/range-v3/CMakeLists.txt:24 (include) -- Found Git: /usr/bin/git (found version "2.47.3") -- [range-v3]: C++ std=2a -- Performing Test RANGES_HAS_CXXSTD -- Performing Test RANGES_HAS_CXXSTD - Success -- Performing Test RANGES_HAS_WALL -- Performing Test RANGES_HAS_WALL - Success -- Performing Test RANGES_HAS_WEXTRA -- Performing Test RANGES_HAS_WEXTRA - Success -- Performing Test RANGES_HAS_WERROR -- Performing Test RANGES_HAS_WERROR - Success -- Performing Test RANGES_HAS_D__EXTERN_ALWAYS_INLINE -- Performing Test RANGES_HAS_D__EXTERN_ALWAYS_INLINE - Success -- Performing Test RANGES_HAS_FDIAGNOSTIC_SHOW_TEMPLATE_TREE -- Performing Test RANGES_HAS_FDIAGNOSTIC_SHOW_TEMPLATE_TREE - Success -- Performing Test RANGES_HAS_FTEMPLATE_BACKTRACE_LIMIT -- Performing Test RANGES_HAS_FTEMPLATE_BACKTRACE_LIMIT - Success -- Performing Test RANGES_HAS_FMACRO_BACKTRACE_LIMIT -- Performing Test RANGES_HAS_FMACRO_BACKTRACE_LIMIT - Success -- Performing Test RANGES_HAS_OMIT_FRAME_POINTER -- Performing Test RANGES_HAS_OMIT_FRAME_POINTER - Success -- Performing Test RANGES_HAS_OFAST -- Performing Test RANGES_HAS_OFAST - Success -- Performing Test RANGES_HAS_STRICT_ALIASING -- Performing Test RANGES_HAS_STRICT_ALIASING - Success -- Performing Test RANGES_HAS_STRICT_VTABLE_POINTERS -- Performing Test RANGES_HAS_STRICT_VTABLE_POINTERS - Success -- Performing Test RANGES_HAS_FAST_MATH -- Performing Test RANGES_HAS_FAST_MATH - Success -- Performing Test RANGES_HAS_VECTORIZE -- Performing Test RANGES_HAS_VECTORIZE - Success -- Performing Test RANGES_HAS_SIZED_DEALLOCATION -- Performing Test RANGES_HAS_SIZED_DEALLOCATION - Success -- Performing Test RANGES_HAS_MARCH_NATIVE -- Performing Test RANGES_HAS_MARCH_NATIVE - Success -- Performing Test RANGES_HAS_MTUNE_NATIVE -- Performing Test RANGES_HAS_MTUNE_NATIVE - Success -- Performing Test RANGE_V3_ALIGNED_NEW_PROBE -- Performing Test RANGE_V3_ALIGNED_NEW_PROBE - Success -- Performing Test RANGES_HAS_FCOROUTINES_TS -- Performing Test RANGES_HAS_FCOROUTINES_TS - Failed -- Performing Test RANGE_V3_HAS_FCONCEPTS -- Performing Test RANGE_V3_HAS_FCONCEPTS - Failed -- Performing Test GCC_COLOR -- Performing Test GCC_COLOR - Success -- Performing Test CLANG_COLOR -- Performing Test CLANG_COLOR - Success -- Performing Test COMPILER_SUPPORTS_CPU_TYPE -- Performing Test COMPILER_SUPPORTS_CPU_TYPE - Success -- Unit tests are enabled -- Performing Test HAS_SYSCALL_GETCPU -- Performing Test HAS_SYSCALL_GETCPU - Failed -- Performing Test HAS_SYSCALL_GETTID -- Performing Test HAS_SYSCALL_GETTID - Success -- Has gettid helper -- Performing Test HAS_SYSCALL_TGKILL -- Performing Test HAS_SYSCALL_TGKILL - Failed -- Performing Test HAS_SYSCALL_STATX -- Performing Test HAS_SYSCALL_STATX - Success -- Has statx helper -- Performing Test HAS_SYSCALL_RENAMEAT2 -- Performing Test HAS_SYSCALL_RENAMEAT2 - Failed -- The ASM_NASM compiler identification is NASM -- Found assembler: /usr/bin/nasm -- Configuring done (54.1s) -- Generating done (3.3s) CMake Warning: Manually-specified variables were not used by the project: BUILD_TESTS -- Build files have been written to: /root/FEX/Build/build

Likely related to The C compiler identification is GNU 14.2.0
Both CC and CXX need to be Clang.
CC=clang CXX=clang++ cmake ...