diff --git a/gcc/config/gcn/gcn-hsa.h b/gcc/config/gcn/gcn-hsa.h
index 6a432d1..4fd2f07 100644
--- a/gcc/config/gcn/gcn-hsa.h
+++ b/gcc/config/gcn/gcn-hsa.h
@@ -96,21 +96,10 @@
 #define X_908 "march=gfx908:;"
 #endif
 
-#ifdef HAVE_GCN_SRAM_ECC_FIJI
-#define S_FIJI
-#else
+/* These targets can't have SRAM-ECC, even if a broken assembler allows it.  */
 #define S_FIJI "!march=*:;march=fiji:;"
-#endif
-#ifdef HAVE_GCN_SRAM_ECC_GFX900
-#define S_900
-#else
 #define S_900 "march=gfx900:;"
-#endif
-#ifdef HAVE_GCN_SRAM_ECC_GFX906
-#define S_906
-#else
 #define S_906 "march=gfx906:;"
-#endif
 #ifdef HAVE_GCN_SRAM_ECC_GFX908
 #define S_908
 #else
diff --git a/gcc/config/gcn/gcn.c b/gcc/config/gcn/gcn.c
index 2e90f32..75a9c57 100644
--- a/gcc/config/gcn/gcn.c
+++ b/gcc/config/gcn/gcn.c
@@ -5226,27 +5226,21 @@
 #ifndef HAVE_GCN_XNACK_FIJI
       use_xnack_attr = false;
 #endif
-#ifndef HAVE_GCN_SRAM_ECC_FIJI
       use_sram_attr = false;
-#endif
       break;
     case PROCESSOR_VEGA10:
       cpu = "gfx900";
 #ifndef HAVE_GCN_XNACK_GFX900
       use_xnack_attr = false;
 #endif
-#ifndef HAVE_GCN_SRAM_ECC_GFX900
       use_sram_attr = false;
-#endif
       break;
     case PROCESSOR_VEGA20:
       cpu = "gfx906";
 #ifndef HAVE_GCN_XNACK_GFX906
       use_xnack_attr = false;
 #endif
-#ifndef HAVE_GCN_SRAM_ECC_GFX906
       use_sram_attr = false;
-#endif
       break;
     case PROCESSOR_GFX908:
       cpu = "gfx908";
diff --git a/gcc/config/gcn/mkoffload.c b/gcc/config/gcn/mkoffload.c
index a3b22d0..b2e71ea 100644
--- a/gcc/config/gcn/mkoffload.c
+++ b/gcc/config/gcn/mkoffload.c
@@ -42,8 +42,10 @@
 
 #undef  ELFOSABI_AMDGPU_HSA
 #define ELFOSABI_AMDGPU_HSA	 64
-#undef  ELFABIVERSION_AMDGPU_HSA
-#define ELFABIVERSION_AMDGPU_HSA 1
+#undef  ELFABIVERSION_AMDGPU_HSA_V3
+#define ELFABIVERSION_AMDGPU_HSA_V3 1
+#undef  ELFABIVERSION_AMDGPU_HSA_V4
+#define ELFABIVERSION_AMDGPU_HSA_V4 2
 
 #undef  EF_AMDGPU_MACH_AMDGCN_GFX803
 #define EF_AMDGPU_MACH_AMDGCN_GFX803 0x2a
@@ -77,6 +79,7 @@
 #define SET_SRAM_ECC_ON(VAR) VAR |= EF_AMDGPU_SRAM_ECC_V3
 #define SET_SRAM_ECC_ANY(VAR) SET_SRAM_ECC_ON (VAR)
 #define SET_SRAM_ECC_OFF(VAR) VAR &= ~EF_AMDGPU_SRAM_ECC_V3
+#define SET_SRAM_ECC_UNSUPPORTED(VAR) SET_SRAM_ECC_OFF (VAR)
 #define TEST_SRAM_ECC_ANY(VAR) 0 /* Not supported.  */
 #define TEST_SRAM_ECC_ON(VAR) (VAR & EF_AMDGPU_SRAM_ECC_V3)
 #endif
@@ -94,6 +97,9 @@
 				     | EF_AMDGPU_FEATURE_SRAMECC_ANY_V4)
 #define SET_SRAM_ECC_OFF(VAR) VAR = ((VAR & ~EF_AMDGPU_FEATURE_SRAMECC_V4) \
 				     | EF_AMDGPU_FEATURE_SRAMECC_OFF_V4)
+#define SET_SRAM_ECC_UNSUPPORTED(VAR) \
+  VAR = ((VAR & ~EF_AMDGPU_FEATURE_SRAMECC_V4) \
+	 | EF_AMDGPU_FEATURE_SRAMECC_UNSUPPORTED_V4)
 #define TEST_SRAM_ECC_ANY(VAR) ((VAR & EF_AMDGPU_FEATURE_SRAMECC_V4) \
 				== EF_AMDGPU_FEATURE_SRAMECC_ANY_V4)
 #define TEST_SRAM_ECC_ON(VAR) ((VAR & EF_AMDGPU_FEATURE_SRAMECC_V4) \
@@ -346,12 +352,27 @@
   /* We only support host relocations of x86_64, for now.  */
   gcc_assert (ehdr.e_machine == EM_X86_64);
 
+  /* Fiji devices use HSACOv3 regardless of the assembler.  */
+  uint32_t elf_flags_actual = (elf_arch == EF_AMDGPU_MACH_AMDGCN_GFX803
+			       ? 0 : elf_flags);
+  /* GFX900 devices don't support the sramecc attribute even if
+     a buggy assembler thinks it does.  This must match gcn-hsa.h  */
+  if (elf_arch == EF_AMDGPU_MACH_AMDGCN_GFX900)
+    SET_SRAM_ECC_UNSUPPORTED (elf_flags_actual);
+
   /* Patch the correct elf architecture flag into the file.  */
   ehdr.e_ident[7] = ELFOSABI_AMDGPU_HSA;
-  ehdr.e_ident[8] = ELFABIVERSION_AMDGPU_HSA;
+#ifdef HAVE_GCN_ASM_V3_SYNTAX
+  ehdr.e_ident[8] = ELFABIVERSION_AMDGPU_HSA_V3;
+#endif
+#ifdef HAVE_GCN_ASM_V4_SYNTAX
+  ehdr.e_ident[8] = (elf_arch == EF_AMDGPU_MACH_AMDGCN_GFX803
+		     ? ELFABIVERSION_AMDGPU_HSA_V3
+		     : ELFABIVERSION_AMDGPU_HSA_V4);
+#endif
   ehdr.e_type = ET_REL;
   ehdr.e_machine = EM_AMDGPU;
-  ehdr.e_flags = elf_arch | elf_flags;
+  ehdr.e_flags = elf_arch | elf_flags_actual;
 
   /* Load the section headers so we can walk them later.  */
   Elf64_Shdr *sections = (Elf64_Shdr *)xmalloc (sizeof (Elf64_Shdr)
@@ -987,13 +1008,6 @@
   obstack_ptr_grow (&cc_argv_obstack, "-xlto");
   if (fopenmp)
     obstack_ptr_grow (&cc_argv_obstack, "-mgomp");
-  obstack_ptr_grow (&cc_argv_obstack,
-		    (TEST_XNACK (elf_flags)
-		     ? "-mxnack" : "-mno-xnack"));
-  obstack_ptr_grow (&cc_argv_obstack,
-		    (TEST_SRAM_ECC_ON (elf_flags) ? "-msram-ecc=on"
-		     : TEST_SRAM_ECC_ANY (elf_flags) ? "-msram-ecc=any"
-		     : "-msram-ecc=off"));
 
   for (int ix = 1; ix != argc; ix++)
     {