https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114049
--- Comment #6 from Iain Sandoe <iains at gcc dot gnu.org> --- I'm still finding this a bit confusing. - we have not altered the code in this area (at least not the Darwin parts) during the gcc-14 cycle. - apparently, it works with previous Xcode versions/SDKs - from your comment #2 "$ clang /vol/gcc/src/hg/master/darwin/gcc/testsuite/gcc.dg/framework-1.c -F. -S -o framework-1.s In file included from /vol/gcc/src/hg/master/darwin/gcc/testsuite/gcc.dg/framework-1.c:4: /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Headers/string.h:55:10: error: 'machine/trap.h' file not found with <angled> include; use "quotes" instead #include <machine/trap.h> " that seems to be an error, not a warning (even if it diagnoses better than we do). - even if it tries to fall back to the "" version, that still should not find the header according to the information in comment #5 - since we so not add any paths below Library/Frameworks .. so 'machine' is only a top level include directory in /usr/include (and it does not contain trap.h).