[gcc r12-1983] Darwin, CTF, BTF: Do not run the DWARF debug link for BTF/CTF [PR101283].

[gcc r12-1983] Darwin, CTF, BTF: Do not run the DWARF debug link for BTF/CTF [PR101283].

[Iain D Sandoe]

https://gcc.gnu.org/g:85017431068251628478f38346c273418c71209b

commit r12-1983-g85017431068251628478f38346c273418c71209b
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Fri Jul 2 09:51:57 2021 +0100

    Darwin, CTF, BTF: Do not run the DWARF debug link for BTF/CTF [PR101283].
    
    Darwin uses an efficient two-stage process for debug linking.
    The static linker (ld64) notes the inputs required but does not
    link the debug.  When required / on demand the debug is linked
    into a separate package by the debug linker (dsymutil).  At
    present none of the Darwin tools consume or understand BTF/CTF.
    The static linker silently accepts the sections (but will not
    act on them as containing anything to be processed).
    
    However, the debug linker produces a warning that it has been
    presented with input with no [DWARF] debug content:
    warning: no debug symbols in executable (-arch x86_64).
    
    This causes several testsuite fails with excess errors.
    
    Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
    
    PR debug/101283 - Several tests fail on Darwin with -gctf/gbtf
    
            PR debug/101283
    
    gcc/ChangeLog:
    
            * config/darwin.h (DSYMUTIL_SPEC): Do not try to run
            dsymutil for BTF/CTF.

Diff:
---
 gcc/config/darwin.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/config/darwin.h b/gcc/config/darwin.h
index 6840aebe794..5f119789973 100644
--- a/gcc/config/darwin.h
+++ b/gcc/config/darwin.h
@@ -250,10 +250,10 @@ extern GTY(()) int darwin_ms_struct;
 #define DSYMUTIL_SPEC \
    "%{!fdump=*:%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
     %{v} \
-    %{g*:%{!gstabs*:%{%:debug-level-gt(0): -idsym}}}\
+    %{g*:%{!gctf:%{!gbtf:%{!gstabs*:%{%:debug-level-gt(0): -idsym}}}}}\
     %{.c|.cc|.C|.cpp|.cp|.c++|.cxx|.CPP|.m|.mm|.s|.f|.f90|\
       .f95|.f03|.f77|.for|.F|.F90|.F95|.F03: \
-    %{g*:%{!gstabs*:%{%:debug-level-gt(0): -dsym}}}}}}}}}}}"
+    %{g*:%{!gctf:%{!gbtf:%{!gstabs*:%{%:debug-level-gt(0): -dsym}}}}}}}}}}}}}"
 
 #define LINK_COMMAND_SPEC LINK_COMMAND_SPEC_A DSYMUTIL_SPEC