From dd5f89bf9205a9d983f8dfb9b84b9179b4ff3b38 Mon Sep 17 00:00:00 2001
From: Ivan Kravets <me@ikravets.com>
Date: Tue, 24 Dec 2019 14:36:44 +0200
Subject: [PATCH] Fixed an issue with LDF when header files not found if
 "libdeps_dir" is within a subdirectory of "lib_extra_dirs" // Resolve #3311

---
 HISTORY.rst                        | 1 +
 platformio/builder/tools/piolib.py | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/HISTORY.rst b/HISTORY.rst
index 574426028f..b924871845 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -20,6 +20,7 @@ PlatformIO Core 4.0
 * Fixed an issue when ``env.BoardConfig()`` does not work for custom boards in extra scripts of libraries (`issue #3264 <https://github.com/platformio/platformio-core/issues/3264>`_)
 * Fixed an issue with "start-group/end-group" linker flags on Native development platform (`issue #3282 <https://github.com/platformio/platformio-core/issues/3282>`_)
 * Fixed default PIO Unified Debugger configuration for `J-Link probe <http://docs.platformio.org/page/plus/debug-tools/jlink.html>`__
+* Fixed an issue with LDF when header files not found if "libdeps_dir" is within a subdirectory of "lib_extra_dirs" (`issue #3311 <https://github.com/platformio/platformio-core/issues/3311>`_)
 
 4.1.0 (2019-11-07)
 ~~~~~~~~~~~~~~~~~~
diff --git a/platformio/builder/tools/piolib.py b/platformio/builder/tools/piolib.py
index bd4bcf7482..58d965e0e3 100644
--- a/platformio/builder/tools/piolib.py
+++ b/platformio/builder/tools/piolib.py
@@ -886,7 +886,7 @@ def process_dependencies(self):  # pylint: disable=too-many-branches
                 if not lib_dir:
                     continue
                 for lb in self.env.GetLibBuilders():
-                    if lib_dir not in lb:
+                    if lib_dir != lb.path:
                         continue
                     if lb not in self.depbuilders:
                         self.depend_recursive(lb)