Enable big-endian suffixed dynamic linker per glibc multi-abi support.

And to avoid a future churn and version pairingi hassles, also allow
arc700 although glibc for ARC currently doesn't support it.

gcc/
xxxx-xx-xx  Vineet Gupta <vgu...@synopsys.com>
+
+       * config/arc/linux.h: GLIBC_DYNAMIC_LINKER support BE/arc700

Signed-off-by: Vineet Gupta <vgu...@synopsys.com>
---
 gcc/ChangeLog          | 4 ++++
 gcc/config/arc/linux.h | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 86ad683a6cb0..c26a748fd51b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2020-03-28  Vineet Gupta <vgu...@synopsys.com>
+
+       * config/arc/linux.h: GLIBC_DYNAMIC_LINKER support BE/arc700
+
 2020-03-28  Jakub Jelinek  <ja...@redhat.com>
 
        PR c/93573
diff --git a/gcc/config/arc/linux.h b/gcc/config/arc/linux.h
index 0b99da3fcdaf..1bbeccee7115 100644
--- a/gcc/config/arc/linux.h
+++ b/gcc/config/arc/linux.h
@@ -29,7 +29,7 @@ along with GCC; see the file COPYING3.  If not see
     }                                          \
   while (0)
 
-#define GLIBC_DYNAMIC_LINKER   "/lib/ld-linux-arc.so.2"
+#define GLIBC_DYNAMIC_LINKER   
"/lib/ld-linux-arc%{mbig-endian:eb}%{mcpu=arc700:700}.so.2"
 #define UCLIBC_DYNAMIC_LINKER  "/lib/ld-uClibc.so.0"
 
 /* Note that the default is to link against dynamic libraries, if they are
-- 
2.20.1

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