Can't compile head

[jquartel]

I was having a similar issue as for #182 but I'm not able to fix with a --head brew install as this fails to compile. See output below, after which there was no ctlrender executable created. I'm on Apple silicon running MacOS 15.5.

$ brew install --head ctl
==> Fetching dependencies for ctl: aces_container
==> Fetching aces_container
==> Downloading https://ghcr.io/v2/homebrew/core/aces_container/manifests/1.0.2
Already downloaded: /Users/johnquartel/Library/Caches/Homebrew/downloads/2138ad7478057dfe56e569ba7d4a003816d834dd200d87d2a9a7bc1e7cf87476--aces_container-1.0.2.bottle_manifest.json
==> Downloading https://ghcr.io/v2/homebrew/core/aces_container/blobs/sha256:470a323
Already downloaded: /Users/johnquartel/Library/Caches/Homebrew/downloads/56cccfd322a3e539e663f8614bc4fbe3d842e51d377d2207d0becd05d83d5201--aces_container--1.0.2.arm64_sequoia.bottle.tar.gz
==> Fetching ctl
==> Downloading https://raw.githubusercontent.com/Homebrew/homebrew-core/0208d0f6947
Already downloaded: /Users/johnquartel/Library/Caches/Homebrew/downloads/b3dff63e496b7b6bfac9ba49fcf159bc7dd3307eccd78eceef97e03ed49704b3--ctl.rb
==> Cloning https://github.com/ampas/CTL.git
Updating /Users/johnquartel/Library/Caches/Homebrew/ctl--git
==> Checking out branch master
Already on 'master'
Your branch is up to date with 'origin/master'.
HEAD is now at 7ad9797 Issues/0180 llvm gentoo error (#181)
==> Installing dependencies for ctl: aces_container
==> Installing ctl dependency: aces_container
==> Downloading https://ghcr.io/v2/homebrew/core/aces_container/manifests/1.0.2
Already downloaded: /Users/johnquartel/Library/Caches/Homebrew/downloads/2138ad7478057dfe56e569ba7d4a003816d834dd200d87d2a9a7bc1e7cf87476--aces_container-1.0.2.bottle_manifest.json
==> Pouring aces_container--1.0.2.arm64_sequoia.bottle.tar.gz
🍺 /opt/homebrew/Cellar/aces_container/1.0.2: 23 files, 250KB
==> Installing ctl --HEAD
==> cmake -S . -B build -DBUILD_SHARED_LIBS=ON -DCMAKE_INSTALL_RPATH=@loader_path/..
==> cmake --build build
Last 15 lines from /Users/johnquartel/Library/Logs/Homebrew/ctl/02.cmake:
Ctl::HalfType::evaluate(Ctl::LContext&, Ctl::RcPtrCtl::ExprNode const&) const in CtlType.cpp.o
Ctl::HalfType::evaluate(Ctl::LContext&, Ctl::RcPtrCtl::ExprNode const&) const in CtlType.cpp.o
...
"operator<<(std::__1::basic_ostream<char, std::__1::char_traits>&, half)", referenced from:
Ctl::HalfLiteralNode::print(int) const in CtlSyntaxTree.cpp.o
Ctl::HalfLiteralNode::printLiteral() const in CtlSyntaxTree.cpp.o
Ctl::HalfType::evaluate(Ctl::LContext&, Ctl::RcPtrCtl::ExprNode const&) const in CtlType.cpp.o
Ctl::HalfType::evaluate(Ctl::LContext&, Ctl::RcPtrCtl::ExprNode const&) const in CtlType.cpp.o
ld: symbol(s) not found for architecture arm64
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
/opt/homebrew/Library/Homebrew/shims/mac/super/clang++ -O3 -DNDEBUG -arch arm64 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk -dynamiclib -Wl,-headerpad_max_install_names -compatibility_version 1.5.3 -current_version 1.5.3 -o libIlmCtl.1.5.3.dylib -install_name @rpath/libIlmCtl.1.5.3.dylib CMakeFiles/IlmCtl.dir/CtlAddr.cpp.o CMakeFiles/IlmCtl.dir/CtlAlign.cpp.o CMakeFiles/IlmCtl.dir/CtlExc.cpp.o CMakeFiles/IlmCtl.dir/CtlFunctionCall.cpp.o CMakeFiles/IlmCtl.dir/CtlInterpreter.cpp.o CMakeFiles/IlmCtl.dir/CtlLContext.cpp.o CMakeFiles/IlmCtl.dir/CtlLex.cpp.o CMakeFiles/IlmCtl.dir/CtlMessage.cpp.o CMakeFiles/IlmCtl.dir/CtlModule.cpp.o CMakeFiles/IlmCtl.dir/CtlModuleSet.cpp.o CMakeFiles/IlmCtl.dir/CtlParser.cpp.o CMakeFiles/IlmCtl.dir/CtlRcPtr.cpp.o CMakeFiles/IlmCtl.dir/CtlSymbolTable.cpp.o CMakeFiles/IlmCtl.dir/CtlSyntaxTree.cpp.o CMakeFiles/IlmCtl.dir/CtlTokens.cpp.o CMakeFiles/IlmCtl.dir/CtlType.cpp.o CMakeFiles/IlmCtl.dir/CtlTypeStorage.cpp.o CMakeFiles/IlmCtl.dir/CtlStdType.cpp.o /opt/homebrew/lib/libOpenEXR.dylib /opt/homebrew/lib/libImath.dylib /usr/local/lib/libHalf.dylib /opt/homebrew/lib/libIlmThread.dylib /opt/homebrew/lib/libIex.dylib
make[2]: *** [lib/IlmCtl/libIlmCtl.1.5.3.dylib] Error 1
make[1]: *** [lib/IlmCtl/CMakeFiles/IlmCtl.dir/all] Error 2
make: *** [all] Error 2

READ THIS: https://docs.brew.sh/Troubleshooting

ctl's formula was built from an unstable upstream --HEAD.
This build failure is expected behaviour.

[michaeldsmith]

@jquartel I just added some additional CI in this PR #184 that includes brew install --head ctl It seems to work OK.

Maybe there are other issues related to versions or dependencies on your system? Its hard for me to know. I'm also not the maintainer of the CTL brew package, I'm currently the maintainer of the CTL source repo. Perhaps you could get additional support from the homebrew CTL package maintainer if that is accessible somewhere?

You can also try building CTL directly from source on your system using homebrew to manage the openexr and TIFF dependencies. As a potential guide, you can have a look that these steps here in the CI:

CTL/.github/workflows/mac_brew.yml

Line 23 in e750dec

build-ctl-using-brew:

[jquartel]

Thanks. When I attempt on an older (Intel amd64) Mac then it compiles fine. Could this:
ld: symbol(s) not found for architecture arm64
be an indication of a missing dependency for arm64 architecture?

[jquartel]

I think I can't stop the compile from finding an old x86 version of ilmbase:
$ cmake --build build [ 1%] Linking CXX shared library libIlmCtl.dylib ld: warning: ignoring file '/usr/local/lib/libHalf-2_5.dylib': found architecture 'x86_64', required architecture 'arm64'

The previous cmake call showed

--  found OpenEXR with FindModule
-- IlmBase info:
--        IlmBase_VERSION = 2.5
--    IlmBase_INCLUDE_DIR = /usr/local/include/OpenEXR
--   IlmBase_INCLUDE_DIRS = /usr/local/include;/usr/local/include/OpenEXR
--        IlmBase_LIBRARY = 
--      IlmBase_LIBRARIES = /usr/local/lib/libHalf-2_5.dylib;/opt/homebrew/lib/libIex.dylib;/usr/local/lib/libIexMath.dylib;/opt/homebrew/lib/libIlmThread.dylib;/opt/homebrew/lib/libImath.dylib

shouldn't it be finding these in /opt/homebrew/lib ?

[jquartel]

And despite what it says at https://github.com/Homebrew/homebrew-core/pkgs/container/core%2Filmbase , I can't install ilmbase from homebrew. I just get:

$ brew install ilmbase
Warning: No available formula with the name "ilmbase".
==> Searching for similarly named formulae and casks...
Error: No formulae or casks found for ilmbase.

I've tried uninstalling openexer and reinstalling, but I can't seem to get an arm64 version (or any version other than 2.5) of the IlmBase libraries.

[michaeldsmith]

You only need Ilmbase if you want to use OpenEXR v2.x. If you are having trouble with an old IlmBase or OpenEXR v2 install on your system that is being found by Cmake, if you can't remove them, you could try modifying or deleting the OpenEXR find module that is used to try to find Openexr v2 that is in the /CTL/cmake/module folder here https://github.com/ampas/CTL/blob/master/cmake/modules/FindOpenEXR.cmake You can also try modifying the Cmake module that tries to find Ilmbase here https://github.com/ampas/CTL/blob/master/cmake/modules/FindIlmBase.cmake

Another idea is that you could reverse the search for OpenEXR in /CTL/CMakeLists.txt. It currently looks for OpenEXR v2 first on line 61 before looking for OpenEXR v3 on line 68

Many packages have moved on from OpenEXR v2 to OpenEXR v3 now that it has been several years since OpenEXR v3's release. I have made CTL compatible with both OpenEXR v2.x and OpenEXR v3.x by following their porting-guide.

In your case of using Mac ARM 64 platform, I think you have 4 paths you can try:

1. simply install CTL using homebrew:
   brew install ctl --head

2. install the library dependencies needed by CTL (cmake, openexr and perhaps libtiff or aces_container) using homebrew and then compiling CTL from source

brew install openexr 
brew install libtiff
brew install aces_container
git clone https://github.com/ampas/CTL.git
cd CTL
mkdir build
cd build
cmake ..
make
make install

3. compile both library dependencies (openexr) and CTL from source

git clone https://github.com/AcademySoftwareFoundation/openexr.git &&
cd openexr
git checkout RB-3.1 &&
mkdir build &&
cd build &&
cmake .. &&
make &&
sudo make install
cd ../..
git clone https://github.com/ampas/CTL.git
cd CTL
mkdir build
cd build
cmake ..
make
make install

4. use docker to compile and run CTL

git clone https://github.com/ampas/CTL.git
docker build --rm -f Dockerfile -t ctl:latest .
docker run -it --rm ctl:latest

[jquartel]

Thanks Micahel. I actually made some headway by hand-installing ilmbase. That required some hacking of the make file but it did eventually compile and that got me past the libHalf sticking point (the libHalf libraries I had were built for x86 which likely came from a migration from my old Mac - I don't know why doing openexr installs doesn't build new one). But then I ran into what looks like a similar issue with libIlmCtlMath.dylib :

$ cmake --build build
[  1%] Linking CXX shared library libIlmCtl.dylib
[ 20%] Built target IlmCtl
[ 21%] Building CXX object lib/IlmCtlMath/CMakeFiles/IlmCtlMath.dir/CtlColorSpace.cpp.o
[ 22%] Building CXX object lib/IlmCtlMath/CMakeFiles/IlmCtlMath.dir/CtlLookupTable.cpp.o
[ 23%] Building CXX object lib/IlmCtlMath/CMakeFiles/IlmCtlMath.dir/CtlRbfInterpolator.cpp.o
[ 24%] Linking CXX shared library libIlmCtlMath.dylib
Undefined symbols for architecture arm64:
  "Iex::BaseExc::BaseExc(char const*)", referenced from:
      Imath::Matrix44<float>::inverse(bool) const in CtlColorSpace.cpp.o
      Imath::Matrix44<float>::gjInverse(bool) const in CtlColorSpace.cpp.o
      Imath::Matrix44<float>::gjInverse(bool) const in CtlColorSpace.cpp.o
  "Iex::BaseExc::BaseExc(std::__1::basic_stringstream<char, std::__1::char_traits<char>, std::__1::allocator<char>>&)", referenced from:
      double Ctl::CG<double, Ctl::LSSOperator<double, Ctl::CRSOperator<double>>, Ctl::NullLinearOperator>::operator()<std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>>(std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>) const in CtlRbfInterpolator.cpp.o
      double Ctl::CG<double, Ctl::LSSOperator<double, Ctl::CRSOperator<double>>, Ctl::NullLinearOperator>::operator()<std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>>(std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>) const in CtlRbfInterpolator.cpp.o
      double Ctl::CG<double, Ctl::LSSOperator<double, Ctl::CRSOperator<double>>, Ctl::NullLinearOperator>::operator()<std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>>(std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>) const in CtlRbfInterpolator.cpp.o
      double Ctl::CG<double, Ctl::LSSOperator<double, Ctl::CRSOperator<double>>, Ctl::NullLinearOperator>::operator()<std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>>(std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>, std::__1::__wrap_iter<double*>) const in CtlRbfInterpolator.cpp.o
  "Iex::BaseExc::~BaseExc()", referenced from:
      Imath::SingMatrixExc::~SingMatrixExc() in CtlColorSpace.cpp.o
      Imath::SingMatrixExc::~SingMatrixExc() in CtlColorSpace.cpp.o
      Iex::ArgExc::~ArgExc() in CtlRbfInterpolator.cpp.o
      Iex::ArgExc::~ArgExc() in CtlRbfInterpolator.cpp.o
  "Iex::BaseExc::what() const", referenced from:
      vtable for Imath::SingMatrixExc in CtlColorSpace.cpp.o
      vtable for Iex::ArgExc in CtlRbfInterpolator.cpp.o
  "typeinfo for Iex::BaseExc", referenced from:
      typeinfo for Iex::MathExc in CtlColorSpace.cpp.o
      typeinfo for Iex::ArgExc in CtlRbfInterpolator.cpp.o
ld: symbol(s) not found for architecture arm64

So following your paths: (1) doesn't work, hence this ticket. I tried (2) and installing openexr, libtiff, and aces_container jsut resulted in messages like Warning: openexr 3.3.5 is already installed and up-to-date. Then compiling CTL from a github checkout died for possibly the same reason as above:

...
[ 46%] Built target IlmCtlSimd
[ 47%] Building CXX object lib/IlmImfCtl/CMakeFiles/IlmImfCtl.dir/ImfCtlApplyTransforms.cpp.o
[ 48%] Building CXX object lib/IlmImfCtl/CMakeFiles/IlmImfCtl.dir/ImfCtlCopyFunctionArg.cpp.o
/Users/johnquartel/Documents/GitRepos/CTL/lib/IlmImfCtl/ImfCtlCopyFunctionArg.cpp:92:9: error: reference to 'TypeExc' is ambiguous
   92 |         THROW (TypeExc,
      |                ^
/opt/homebrew/include/OpenEXR/IexForward.h:26:7: note: candidate found by name lookup is 'Iex::TypeExc'
   26 | class TypeExc;
      |       ^
/opt/homebrew/include/OpenEXR/IexBaseExc.h:186:17: note: candidate found by name lookup is 'Iex_3_3::TypeExc'
  186 |     IEX_EXPORT, TypeExc, BaseExc) // An object is an inappropriate type,
      |                 ^
...

So I will try your option(3) next. However, I do think at least one of the dependent packages must have a fault in the brew formula if my machine can get into a state where makes are attempting to use x86-built libraries.

[michaeldsmith]

If you want to try modifying the code to get around the "error: reference to 'TypeExc' is ambigous" error that is blocking your compile, you could try replacing the 13 instances of "TypeExc" with "Iex::TypeExc" on all files except CtlSimSyntaxTree.cpp, which already uses Iex::TypeExc, see screenshot from Search->Replace in VS Code

This shouldn't be necessary since these files all have code using namespace Iex at the top, but it is worth a try

[michaeldsmith]

@jquartel are you still having issues? If yes, can you try again using the latest master branch? I just merged PR #189 that changed CMake to find OpenEXR v3 before OpenEXR v2, which might solve your issue if you have both versions on your system

[jquartel]

Yes I'm still having issues. Now, with a new brew install --head ctl I end up with

CMake Error: The current CMakeCache.txt directory /private/tmp/ctl-20250928-5766-ou09dp/build/CMakeCache.txt is different than the directory /Users/johnquartel/Library/Caches/Homebrew/ctl--git/build where CMakeCache.txt was created. This may result in binaries being created in the wrong place. If you are not sure, reedit the CMakeCache.txt

CMake Error: The source "/private/tmp/ctl-20250928-5766-ou09dp/CMakeLists.txt" does not match the source "/Users/johnquartel/Library/Caches/Homebrew/ctl--git/CMakeLists.txt" used to generate cache. Re-run cmake with a different source directory.

Do you think this is related to the tinkering I did with hand-installing ilmbase?