[PATCH v2] math: Exclude tgmath3-macro-tests for Clang

[H.J. Lu]

Since Clang doesn't support _Complex __int128:

.../test-tgmath3-exp.c:152:1: error: '_Complex __int128' is invalid
  152 | _Complex __int128 var__Complex___int128 __attribute__ ((unused));
      | ^

exclude tgmath3-macro-tests for Clang.
---
 math/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/math/Makefile b/math/Makefile
index 93fa147033..798d71dc47 100644
--- a/math/Makefile
+++ b/math/Makefile
@@ -1038,7 +1038,10 @@ tgmath3-macros = \
   ufromfpx \
   # tgmath3-macros
 tgmath3-macro-tests = $(addprefix test-tgmath3-,$(tgmath3-macros))
+ifneq ($(have-test-clang),yes)
+# NB: Clang doesn't support _Complex __int128.
 tests-tgmath += $(tgmath3-macro-tests)
+endif
 tests += $(tests-tgmath)
 
 generated += $(addsuffix .c,$(tgmath3-macro-tests))
-- 
2.47.1