diff --git a/tools/cmake/build.cmake b/tools/cmake/build.cmake
index 0107b76fbe..8ebfed1a03 100644
--- a/tools/cmake/build.cmake
+++ b/tools/cmake/build.cmake
@@ -93,7 +93,9 @@ function(__build_set_default_build_specifications)
     unset(c_compile_options)
     unset(cxx_compile_options)
 
-    list(APPEND compile_definitions "_GNU_SOURCE")
+    list(APPEND compile_definitions "_GLIBCXX_USE_POSIX_SEMAPHORE"  # These two lines enable libstd++ to use
+                                    "_GLIBCXX_HAVE_POSIX_SEMAPHORE" # posix-semaphores from components/pthread
+                                    "_GNU_SOURCE")
 
     list(APPEND compile_options     "-ffunction-sections"
                                     "-fdata-sections"