diff --git a/lld/ELF/MarkLive.cpp b/lld/ELF/MarkLive.cpp
--- a/lld/ELF/MarkLive.cpp
+++ b/lld/ELF/MarkLive.cpp
@@ -261,6 +261,10 @@
         scanEhFrameSection(*eh, eh->template rels<ELFT>());
     }
 
+    if (sec->flags & SHF_GNU_RETAIN) {
+      enqueue(sec, 0);
+      continue;
+    }
     if (sec->flags & SHF_LINK_ORDER)
       continue;
 
diff --git a/lld/test/ELF/gc-sections-retain.s b/lld/test/ELF/gc-sections-retain.s
new file mode 100644
--- /dev/null
+++ b/lld/test/ELF/gc-sections-retain.s
@@ -0,0 +1,37 @@
+# REQUIRES: x86
+## SHF_GNU_RETAIN is a generic feature defined in the OS specific range. The
+## flag marks a section as a GC root.
+
+# RUN: llvm-mc -filetype=obj -triple=x86_64 %s -o %t.o
+# RUN: ld.lld --gc-sections --print-gc-sections %t.o -o %t | count 0
+# RUN: llvm-readobj -h %t | FileCheck %s
+# RUN: ld.lld -r -e _start --gc-sections --print-gc-sections %t.o -o %t.ro | count 0
+# RUN: llvm-readobj -h %t.ro | FileCheck %s
+
+## SHF_GNU_RETAIN has no significance in executables/shared objects. Multiple
+## OSABI values can benefit from this flag. Test that we don't change EI_OSABI,
+## even for relocatable output.
+# CHECK: OS/ABI: SystemV (0x0)
+
+# RUN: llvm-mc -filetype=obj -triple=x86_64 --defsym NONALLOC=1 %s -o %t1.o
+# RUN: not ld.lld --gc-sections %t1.o -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR
+
+# ERR: error: {{.*}}.o:(.nonalloc): sh_link points to discarded section {{.*}}.o:(.discard)
+
+.global _start
+_start:
+
+.section .retain,"aR",@progbits
+.quad .foo
+
+.section .foo,"a",@progbits
+.quad 0
+
+.ifdef NONALLOC
+.section .discard,"a",@progbits
+
+## With SHF_GNU_RETAIN, .nonalloc is retained while its linked-to section
+## .discard is discarded, so there will be an error.
+.section .nonalloc,"oR",@progbits,.discard
+.quad .text
+.endif