[SPARC] Disable ASAN on 64-bit SPARC/Linux

[Eric Botcazou]

With the same error message as on SPARC/Solaris (as I have neither the time 
nor the energy to get through the awkward upstream submission process again).

Tested on SPARC/Solaris and SPARC/Linux, applied on the mainline.


2019-04-02  Eric Botcazou  <ebotca...@adacore.com>

        * config/sparc/linux64.h (ASAN_REJECT_SPEC): New macro.
        (ASAN_CC1_SPEC): Use it in 64-bit mode.
        * config/sparc/sol2.h (ASAN_REJECT_SPEC): Remove superfluous colon.

-- 
Eric Botcazou
Index: config/sparc/linux64.h
===================================================================
--- config/sparc/linux64.h	(revision 270031)
+++ config/sparc/linux64.h	(working copy)
@@ -143,8 +143,18 @@ extern const char *host_detect_local_cpu
 
 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS
 
+/* -fsanitize=address is currently only supported for 32-bit.  */
+#define ASAN_REJECT_SPEC \
+  "%{!%:sanitize(thread):%e-fsanitize=address is not supported in this configuration}"
+
 #undef  ASAN_CC1_SPEC
-#define ASAN_CC1_SPEC "%{%:sanitize(address):-funwind-tables}"
+#if DEFAULT_ARCH32_P
+#define ASAN_CC1_SPEC \
+  "%{%:sanitize(address):-funwind-tables %{m64:" ASAN_REJECT_SPEC "}}"
+#else
+#define ASAN_CC1_SPEC \
+  "%{%:sanitize(address):-funwind-tables %{!m32:" ASAN_REJECT_SPEC "}}"
+#endif
 
 #undef  CC1_SPEC
 #if DEFAULT_ARCH32_P
Index: config/sparc/sol2.h
===================================================================
--- config/sparc/sol2.h	(revision 270031)
+++ config/sparc/sol2.h	(working copy)
@@ -324,7 +324,7 @@ extern const char *host_detect_local_cpu
 
 /* -fsanitize=address is currently only supported for 32-bit.  */
 #define ASAN_REJECT_SPEC \
-  DEF_ARCH64_SPEC("%e:-fsanitize=address is not supported in this configuration")
+  DEF_ARCH64_SPEC("%e-fsanitize=address is not supported in this configuration")
 
 
 /* Register the Solaris-specific #pragma directives.  */