From a0a89a9b95dc7781512c5a73ace83424643f04cd Mon Sep 17 00:00:00 2001
From: Marcin Borowicz <marcinbor85@gmail.com>
Date: Tue, 6 Apr 2021 18:16:09 +0200
Subject: [PATCH] optional FREERTOS_MEMMANG

---
 CMakeLists.txt | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ef53bc2fe..1ca006be6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 if (NOT DEFINED FREERTOS_MEMMANG)
-    message(FATAL_ERROR "FREERTOS_MEMMANG not defined")
+    message(WARNING "FREERTOS_MEMMANG not defined, user should linking some heap management file manually")
 endif()
 
 if (NOT DEFINED FREERTOS_PORT)
@@ -20,9 +20,16 @@ set(
     ${CMAKE_CURRENT_SOURCE_DIR}/list.c
     ${CMAKE_CURRENT_SOURCE_DIR}/event_groups.c
     ${CMAKE_CURRENT_SOURCE_DIR}/croutine.c
-    ${CMAKE_CURRENT_SOURCE_DIR}/portable/MemMang/${FREERTOS_MEMMANG}.c
 )
 
+if (DEFINED FREERTOS_MEMMANG)
+    set(
+        FREERTOS_SRC
+        ${FREERTOS_SRC}
+        ${CMAKE_CURRENT_SOURCE_DIR}/portable/MemMang/${FREERTOS_MEMMANG}.c
+    )
+endif()
+
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/portable/${FREERTOS_PORT})
 
 set(FREERTOS_SRC ${FREERTOS_SRC} PARENT_SCOPE)