[Issue 23631] [REG master] ./src/importc.h:80:8: warning: undefining "__has_builtin"

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23631

--- Comment #1 from Iain Buclaw <ibuclaw at gdcproject.org> ---
All the tests fail in the testsuite too.
---
==============================
Test 'compilable/vastartend.c' failed: 
expected:
----

----
actual:
----
In file included from <command-line>:
/build/dlang/dmd/compiler/test/../../druntime/import/importc.h:80:8: warning:
undefining "__has_builtin"
   80 | #undef __has_builtin
      |        ^~~~~~~~~~~~~
----
diff:
----
-
+In file included from <command-line>:
+/build/dlang/dmd/compiler/test/../../druntime/import/importc.h:80:8: warning:
undefining "__has_builtin"
+   80 | #undef __has_builtin
+      |        ^~~~~~~~~~~~~
----


>>> TARGET FAILED: compilable/vastartend.c
FAILED targets:
- compilable/test22758.c
- compilable/test23038.c
- compilable/enumbase.c
- compilable/test22577.c
- compilable/test23002.c
- compilable/test22886.c
- compilable/test23008.c
- compilable/test22842.c
- compilable/test22894.c
- compilable/cppflags.c
- compilable/test23923.c
- compilable/test22887.c
- compilable/test22928.c
- compilable/test22346.c
- compilable/test22808.c
- compilable/test23030.c
- compilable/test22895.c
- compilable/test22970.c
- compilable/casmmangling.d
- compilable/noreturn.c
- compilable/testcstuff1.c
- compilable/testcstuff3.d
- compilable/arraytopointer.c
- compilable/test22927.c
- compilable/test23029.c
- compilable/test22933.c
- compilable/test22727.c
- compilable/test23217.c
- compilable/test23583.c
- compilable/test22761.c
- compilable/test22877.c
- compilable/test22885.c
- compilable/testdefines.d
- compilable/alignas.c
- compilable/test23622.c
- compilable/test23616.c
- compilable/test22924.c
- compilable/test23004.c
- compilable/test22625.d
- compilable/test22755.c
- compilable/test22607.c
- compilable/test22793.c
- compilable/test23066.c
- compilable/test22955.c
- compilable/test22698.c
- compilable/test22757.c
- compilable/test22705.c
- compilable/test23054.c
- compilable/valist.c
- compilable/test23034.c
- compilable/ctests2.c
- compilable/test22807.c
- compilable/test22892.c
- compilable/test22725.c
- compilable/test22699.c
- compilable/test22734.d
- compilable/cimport.c
- compilable/test22665.d
- compilable/ctests1.c
- compilable/test23044.c
- compilable/test22904.c
- compilable/vastartend.c
make: *** [Makefile:194: run_compilable_tests] Error 1

--