Index: lib/profile/InstrProfilingFile.c
===================================================================
--- lib/profile/InstrProfilingFile.c
+++ lib/profile/InstrProfilingFile.c
@@ -82,7 +82,8 @@
   ProfileNameSpecifier PNS;
 } lprofFilename;
 
-lprofFilename lprofCurFilename = {0, 0, 0, {0}, {0}, 0, 0, 0, PNS_unknown};
+COMPILER_RT_WEAK lprofFilename lprofCurFilename = {0, 0, 0, {0}, {0},
+                                                   0, 0, 0, PNS_unknown};
 
 int getpid(void);
 static int getCurFilenameLength();
Index: test/profile/instrprof-set-filename-shared.test
===================================================================
--- test/profile/instrprof-set-filename-shared.test
+++ test/profile/instrprof-set-filename-shared.test
@@ -1,7 +1,7 @@
 # Test that __llvm_profile_set_filename is honored by shared libary too.
 RUN: mkdir -p %t.d
-RUN: %clang_profgen=%t.shared.profraw -fPIC -shared -o %t.d/t.shared %S/../Inputs/instrprof-dlopen-func.c
-RUN: %clang_profgen -DCALL_SHARED -o %t.m -O3 -rpath %t.d %t.d/t.shared %S/../instrprof-set-filename.c 
+RUN: %clang_profgen=%t.shared.profraw -fPIC -shared -o %t.d/t.shared %S/Inputs/instrprof-dlopen-func.c
+RUN: %clang_profgen -DCALL_SHARED -o %t.m -O3 -rpath %t.d %t.d/t.shared %S/instrprof-set-filename.c
 RUN: %run %t.m %t.main.profraw
 RUN: llvm-profdata show %t.main.profraw | FileCheck --check-prefix=SHARED %s