[BOLT][CMake] Build rt library despite unreadable map_files (llvm#77876)

Emit a warning and print a suggested workaround. Fixes llvm#77822.
AlexandreEichenberger · Mar 20, 2024 · 1918d4b · 1918d4b
1 parent a7d5f73
commit 1918d4b
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/bolt/CMakeLists.txt b/bolt/CMakeLists.txt
@@ -45,9 +45,9 @@ if (BOLT_ENABLE_RUNTIME)
   execute_process(COMMAND ls /proc/self/map_files
     RESULT_VARIABLE LS OUTPUT_QUIET ERROR_QUIET)
   if (LS)
-    set(BOLT_ENABLE_RUNTIME OFF)
     message(WARNING
-      "BOLT runtime is disabled as /proc/self/map_files is unreadable.")
+      "BOLT runtime may not be able to read /proc/self/map_files. Please use
+      `--instrumentation-binpath <path-to-instrumented-binary>` option.")
   endif()
 endif()