From what I understand, with the requirement of C++11 support for upcoming versions of JUCE, a number of macros which are used in the Doxyfile
are now obsolete:
PREDEFINED = WIN32=1 \
JUCE_WIN32=1 \
JUCE_MAC=1 \
JUCE_IOS=1 \
JUCE_ANDROID=1 \
JUCE_LINUX=1 \
DOXYGEN=1 \
JUCE_COMPILER_SUPPORTS_NOEXCEPT=1 \
JUCE_COMPILER_SUPPORTS_NULLPTR=1 \
JUCE_COMPILER_SUPPORTS_MOVE_SEMANTICS=1 \
JUCE_COMPILER_SUPPORTS_INITIALIZER_LISTS=1 \
JUCE_COMPILER_SUPPORTS_VARIADIC_TEMPLATES=1 \
JUCE_COMPILER_SUPPORTS_OVERRIDE_AND_FINAL=1 \
JUCE_COMPILER_SUPPORTS_LAMBDAS=1 \
JUCE_MODAL_LOOPS_PERMITTED=1
Namely the JUCE_COMPILER_SUPPORTS_*
ones.