From 034cd675286db07110a773fdb6a857285485d2d4 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Wed, 18 Dec 2024 18:58:34 +0800
Subject: Don't use glibc <tgmath.h> when testing with Clang

Clang has its own <tgmath.h> and doesn't use <tgmath.h> from glibc.  Pass
"-I." to compiler only if $($(<F)-no-include-dot) are undefined.  Define
it to yes for tgmath tests when testing with Clang.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>
---
 include/tgmath.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'include')

diff --git a/include/tgmath.h b/include/tgmath.h
index 3a2c4a2b2d..1e81bcb1af 100644
--- a/include/tgmath.h
+++ b/include/tgmath.h
@@ -1 +1,7 @@
-#include <math/tgmath.h>
+/* NB: Clang has its own <tgmath.h> and doesn't use <tgmath.h> from
+   glibc.  */
+#if defined _ISOMAC && defined __clang__
+# include_next <tgmath.h>
+#else
+# include <math/tgmath.h>
+#endif
-- 
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