Index: ELF/OutputSections.cpp
===================================================================
--- ELF/OutputSections.cpp
+++ ELF/OutputSections.cpp
@@ -404,9 +404,13 @@
   uint64_t Flags = getOutFlags(IS);
   OutputSection *&Sec = Map[Key];
   if (Sec) {
+    // TODO: pretty print the section flags
     if (getIncompatibleFlags(Sec->Flags) != getIncompatibleFlags(IS->Flags))
-      error("Section has flags incompatible with others with the same name " +
-            toString(IS));
+      error("Section has flags incompatible with others with the same name:"
+            "\n>>> section flags 0x" + utohexstr(IS->Flags) + " defined in " +
+            toString(IS) +
+            "\n>>> are incompatible with 0x" + utohexstr(Sec->Flags) + " for " +
+            Sec->Name);
     if (Sec->Type != IS->Type) {
       if (canMergeToProgbits(Sec->Type) && canMergeToProgbits(IS->Type))
         Sec->Type = SHT_PROGBITS;
Index: test/ELF/incompatible-section-flags.s
===================================================================
--- test/ELF/incompatible-section-flags.s
+++ test/ELF/incompatible-section-flags.s
@@ -1,9 +1,13 @@
 // RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
 // RUN: not ld.lld -shared %t.o -o %t 2>&1 | FileCheck %s
 
-// CHECK: error:  Section has flags incompatible with others with the same name {{.*}}incompatible-section-flags.s.tmp.o:(.foo)
-// CHECK: error:  Section has flags incompatible with others with the same name {{.*}}incompatible-section-flags.s.tmp.o:(.bar)
+// CHECK:      error: Section has flags incompatible with others with the same name:
+// CHECK-NEXT: >>> section flags 0x3 defined in {{.*}}incompatible-section-flags.s.tmp.o:(.foo)
+// CHECK-NEXT: >>> are incompatible with 0x403 for .foo
 
+// CHECK:      error: Section has flags incompatible with others with the same name:
+// CHECK-NEXT: >>> section flags 0x403 defined in {{.*}}incompatible-section-flags.s.tmp.o:(.bar)
+// CHECK-NEXT: >>> are incompatible with 0x3 for .bar
 .section .foo, "awT", @progbits, unique, 1
 .quad 0