[Bug target/114049] gcc.dg/framework-1.c FAILs with Xcode 15.3 beta 3

["ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114049

--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #1 from Iain Sandoe <iains at gcc dot gnu.org> ---
> /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Headers
> should be a symlink to
> /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers

More or less: the symlink is to Versions/Current/Headers.

> so either that's broken or we're failing to follow a symlink somehow.

I've checked: the original invocation is

/private/var/gcc/regression/master/14-gcc/build/gcc/xgcc
-B/private/var/gcc/regression/master/14-gcc/build/gcc/
/vol/gcc/src/hg/master/darwin/gcc/testsuite/gcc.dg/framework-1.c
-fdiagnostics-plain-output -F. -S -o framework-1.s

with cc1 called like

 /private/var/gcc/regression/master/14-gcc/build/gcc/cc1 -quiet -v -F. -iprefix
/private/var/gcc/regression/master/14-gcc/build/gcc/../lib/gcc/x86_64-apple-darwin23.3.0/14.0.1/
-isystem /private/var/gcc/regression/master/14-gcc/build/gcc/include -isystem
/private/var/gcc/regression/master/14-gcc/build/gcc/include-fixed -D__DYNAMIC__
/vol/gcc/src/hg/master/darwin/gcc/testsuite/gcc.dg/framework-1.c -fPIC -quiet
-dumpbase framework-1.c -dumpbase-ext .c -mmacosx-version-min=14.0.0
-mtune=core2 -version -fdiagnostics-color=never -fno-diagnostics-show-caret
-fno-diagnostics-show-line-numbers -fdiagnostics-urls=never
-fdiagnostics-path-format=separate-events -fdiagnostics-text-art-charset=none
-o framework-1.s

After the usual messages about nonexistant directories, we get to

#include <...> search starts here:
 .
 /private/var/gcc/regression/master/14-gcc/build/gcc/include
 /private/var/gcc/regression/master/14-gcc/build/gcc/include-fixed
 /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include
 /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks
End of search list.

/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Headers/string.h

has 

#include <machine/trap.h>

which lives in

/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/machine/trap.h

Given the above search list, "machine/trap.h" should work, but
<machine/trap.h> doesn't.

When using the bundled clang, I get

$ 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>
         ^
In file included from
/vol/gcc/src/hg/master/darwin/gcc/testsuite/gcc.dg/framework-1.c:4:
In file included from
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Headers/string.h:55:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Headers/machine/trap.h:32:10:
fatal error: 'i386/trap.h' file not found
#include "i386/trap.h"
         ^~~~~~~~~~~~~
2 errors generated.