glibc/float128-sycl.patch

From a900dbaf70f0a957f56b52caa69173592ad7596e Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Thu, 20 Feb 2025 07:08:26 +0800
Subject: [PATCH] x86 (__HAVE_FLOAT128): Defined to 0 for Intel SYCL compiler
 [BZ #32723]

Intel compiler always defines __INTEL_LLVM_COMPILER.  When SYCL is
enabled by -fsycl, it also defines SYCL_LANGUAGE_VERSION.  Since Intel
SYCL compiler doesn't support _Float128:

https://github.com/intel/llvm/issues/16903

define __HAVE_FLOAT128 to 0 for Intel SYCL compiler.

This fixes BZ #32723.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>
(cherry picked from commit 5a4573be6f96ff49111bb6cae767676b5aafa7a8)
---
 sysdeps/x86/bits/floatn.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sysdeps/x86/bits/floatn.h b/sysdeps/x86/bits/floatn.h
index d197cb10dd..adc7ed2e9e 100644
--- a/sysdeps/x86/bits/floatn.h
+++ b/sysdeps/x86/bits/floatn.h
@@ -25,11 +25,15 @@
    floating-point type with the IEEE 754 binary128 format, and this
    glibc includes corresponding *f128 interfaces for it.  The required
    libgcc support was added some time after the basic compiler
-   support, for x86_64 and x86.  */
+   support, for x86_64 and x86.  Intel SYCL compiler doesn't support
+   _Float128: https://github.com/intel/llvm/issues/16903
+  */
 #if (defined __x86_64__							\
      ? __GNUC_PREREQ (4, 3)						\
      : (defined __GNU__ ? __GNUC_PREREQ (4, 5) : __GNUC_PREREQ (4, 4))) \
-    || __glibc_clang_prereq (3, 4)
+    || (__glibc_clang_prereq (3, 4)					\
+	&& (!defined __INTEL_LLVM_COMPILER				\
+	    || !defined SYCL_LANGUAGE_VERSION))
 # define __HAVE_FLOAT128 1
 #else
 # define __HAVE_FLOAT128 0
-- 
2.48.1