From bff4226f5a01da2f93d4e096a1c9317a553438a3 Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Mon, 3 Jan 2022 17:16:26 +0100
Subject: [PATCH] libquadmath: Use -mno-gnu-attribute in libquadmath
Testing found that we also need libquadmath to be built with
-mno-gnu-attribute, otherwise -mabi=ieeelongdouble programs don't link.
2022-01-03 Jakub Jelinek <jakub@redhat.com>
* configure.ac: Set XCFLAGS to -mno-gnu-attribute on
powerpc64le*-linux*.
* configure: Regenerated.
---
libquadmath/configure | 24 ++++++++++++++++++++++++
libquadmath/configure.ac | 13 +++++++++++++
2 files changed, 37 insertions(+)
diff --git a/libquadmath/configure b/libquadmath/configure
index 31918507f624..b3ee64f9c7de 100755
--- a/libquadmath/configure
+++ b/libquadmath/configure
@@ -13096,6 +13096,30 @@ fi
XCFLAGS="$XCFLAGS $CET_FLAGS"
+case x$target in
+ xpowerpc64le*-linux*)
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#if __SIZEOF_LONG_DOUBLE__ != 16
+ #error long double is double
+ #endif
+int
+main ()
+{
+(void) 0;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_cpp "$LINENO"; then :
+ XCFLAGS="$XCFLAGS -mno-gnu-attribute"
+fi
+rm -f conftest.err conftest.i conftest.$ac_ext
+ ;;
+ *)
+ ;;
+esac
+
cat >confcache <<\_ACEOF
# This file is a shell script that caches the results of configure
diff --git a/libquadmath/configure.ac b/libquadmath/configure.ac
index f9d745e60ca4..eec4084a45f6 100644
--- a/libquadmath/configure.ac
+++ b/libquadmath/configure.ac
@@ -352,6 +352,19 @@ fi
# Add CET specific flags if CET is enabled
GCC_CET_FLAGS(CET_FLAGS)
XCFLAGS="$XCFLAGS $CET_FLAGS"
+
+case x$target in
+ xpowerpc64le*-linux*)
+ AC_PREPROC_IFELSE(
+ [AC_LANG_PROGRAM([[#if __SIZEOF_LONG_DOUBLE__ != 16
+ #error long double is double
+ #endif]],
+ [[(void) 0;]])],
+ [XCFLAGS="$XCFLAGS -mno-gnu-attribute"])
+ ;;
+ *)
+ ;;
+esac
AC_SUBST(XCFLAGS)
AC_CACHE_SAVE
--
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