This repository showcases how to cross-compile a JUCE audio plugin (on Linux, targeting Windows, using llvm-mingw).
By varying the build arguments, we can reproduce:
If we revert to llvm-mingw 20211002, and target x86_64, it compiles just fine:
docker build --build-arg LLVM_MINGW_VER=20211002 .Failing build (#1028)
We can reproduce the failure to compile with recent llvm-mingw 20220209 (most recent release):
docker build .i.e. a clash of defines on juce_gui_basics.cpp:
In file included from /linux_native/include/JUCE-6.1.5/modules/juce_gui_basics/juce_gui_basics.cpp:309:
/linux_native/include/JUCE-6.1.5/modules/juce_gui_basics/native/accessibility/juce_win32_ComInterfaces.h:123:12: error: expected unqualified-id
const long UIA_InvokePatternId = 10000;
^
/opt/llvm-mingw/x86_64-w64-mingw32/include/uiautomationclient.h:34:30: note: expanded from macro 'UIA_InvokePatternId'
#define UIA_InvokePatternId (10000)
JUCE tries to declare a constant:
const long UIA_InvokePatternId = 10000;But the token UIA_InvokePatternId already exists as a MinGW macro, and expands to (10000), making the statement:
const long (10000) = 10000;Failing build (#1029)
llvm-mingw 20211002 is known-good, but JUCE 6.1.5 encounters compile failure if we target x86 architecture:
docker build --build-arg LLVM_MINGW_VER=20211002 --build-arg XARCH=i686 .In file included from /linux_native/include/JUCE-6.1.5/modules/juce_gui_basics/juce_gui_basics.cpp:309:
/linux_native/include/JUCE-6.1.5/modules/juce_gui_basics/native/accessibility/juce_win32_ComInterfaces.h:179:1: error: class template specialization of 'UUIDGetter' not in a namespace enclosing 'juce'
JUCE_COMCLASS (IRawElementProviderFragmentRoot, "620ce2a5-ab8f-40a9-86cb-de3c75599b58") : public IUnknown
^
/linux_native/include/JUCE-6.1.5/modules/juce_core/native/juce_win32_ComSmartPtr.h:45:5: note: expanded from macro 'JUCE_COMCLASS'
JUCE_DECLARE_UUID_GETTER (name, guid) \
^
/linux_native/include/JUCE-6.1.5/modules/juce_core/native/juce_win32_ComSmartPtr.h:41:24: note: expanded from macro 'JUCE_DECLARE_UUID_GETTER'
template <> struct UUIDGetter<name> { static CLSID get() { return uuidFromString (uuid); } };
^
/linux_native/include/JUCE-6.1.5/modules/juce_core/native/juce_win32_ComSmartPtr.h:31:34: note: explicitly specialized declaration is here
template <typename Type> struct UUIDGetter { static CLSID get() { jassertfalse; return {}; } };
^