From: Anton Maklakov <anton@espressif.com>
Date: Wed, 14 Nov 2018 11:45:14 +0000 (+0800)
Subject: cmake: fix the creation dummy main to avoid rebuilding
X-Git-Tag: v3.3-beta1~116^2~1
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=8e1c91ac7d2e8a001576900b39870db4aab91c4b;p=esp-idf

cmake: fix the creation dummy main to avoid rebuilding
---

diff --git a/tools/cmake/idf_functions.cmake b/tools/cmake/idf_functions.cmake
index 93cc4e7e0c..f949ba5430 100644
--- a/tools/cmake/idf_functions.cmake
+++ b/tools/cmake/idf_functions.cmake
@@ -188,7 +188,10 @@ function(idf_add_executable)
         # Create a dummy file to work around CMake requirement of having a source
         # file while adding an executable
         add_executable(${exe_target} "${CMAKE_CURRENT_BINARY_DIR}/dummy_main_src.c")
-        file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/dummy_main_src.c)
+        add_custom_command(OUTPUT dummy_main_src.c
+            COMMAND ${CMAKE_COMMAND} -E touch dummy_main_src.c
+            WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+            VERBATIM)
 
         add_custom_target(dummy_main_src DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/dummy_main_src.c)