arc: Remove HAVE_ARC_BE macro and disable big-endian port

It is no longer needed, now that ARC is always little endian.

NEWS

@@ -33,7 +33,7 @@ Major new features:
 
 Deprecated and removed features, and other changes affecting compatibility:
 
-  [Add deprecations, removals and changes affecting compatibility here]
+* The big-endian ARC port (arceb-linux-gnu) has been removed.
 
 Changes to build and runtime requirements:
 

config.h.in

@@ -117,9 +117,6 @@
    required version of GNU 'binutils' to 2.28 or later. */
 #define HAVE_AARCH64_SVE_ASM 0
 
-/* ARC big endian ABI */
-#undef HAVE_ARC_BE
-
 /* C-SKY ABI version.  */
 #undef CSKYABI
 

sysdeps/arc/configure

@@ -175,13 +175,8 @@ fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_arc_be" >&5
 printf "%s\n" "$libc_cv_arc_be" >&6; }
 if test $libc_cv_arc_be = yes; then
-  # For shlib-versions.
-  printf "%s\n" "#define HAVE_ARC_BE 1" >>confdefs.h
-
-  config_vars="$config_vars
-default-abi = arcbe"
-else
-  config_vars="$config_vars
-default-abi = arcle"
+  as_fn_error $? "big-endian not supported" "$LINENO" 5
 fi
+config_vars="$config_vars
+default-abi = arcle"
 

sysdeps/arc/configure.ac

@@ -17,9 +17,6 @@ AC_CACHE_CHECK([for big endian],
                      #endif
   ], libc_cv_arc_be=yes, libc_cv_arc_be=no)])
 if test $libc_cv_arc_be = yes; then
-  # For shlib-versions.
-  AC_DEFINE(HAVE_ARC_BE)
-  LIBC_CONFIG_VAR([default-abi], [arcbe])
-else
-  LIBC_CONFIG_VAR([default-abi], [arcle])
+  AC_MSG_ERROR([big-endian not supported])
 fi
+LIBC_CONFIG_VAR([default-abi], [arcle])

sysdeps/unix/sysv/linux/arc/shlib-versions

@@ -1,7 +1,3 @@
 DEFAULT                 GLIBC_2.32
 
-%ifdef HAVE_ARC_BE
-ld=ld-linux-arceb.so.2
-%else
 ld=ld-linux-arc.so.2
-%endif