Merge branch 'bugfix/idf_build_process_default' into 'master'

cmake: fix issue with setting defaults in idf_build_process

Closes IDFGH-3027

See merge request espressif/esp-idf!8537

tools/ci/test_build_system_cmake.sh

@@ -730,6 +730,19 @@ endmenu\n" >> ${IDF_PATH}/Kconfig
     test -f build/flasher_args.json && failure "flasher_args.json should not be generated in a loadable ELF build"
     idf.py build || failure "Couldn't build a loadable ELF file"
 
+    print_status "Defaults set properly for unspecified idf_build_process args"
+    pushd $IDF_PATH/examples/build_system/cmake/idf_as_lib
+    cp CMakeLists.txt CMakeLists.txt.bak
+    echo -e "\nidf_build_get_property(project_dir PROJECT_DIR)" >> CMakeLists.txt
+    echo -e "\nmessage(\"Project directory: \${project_dir}\")" >> CMakeLists.txt
+    mkdir build && cd build
+    cmake .. -DCMAKE_TOOLCHAIN_FILE=$IDF_PATH/tools/cmake/toolchain-esp32.cmake -DTARGET=esp32 &> log.txt
+    grep "Project directory: $IDF_PATH/examples/build_system/cmake/idf_as_lib" log.txt || failure "PROJECT_DIR default was not set"
+    cd ..
+    mv CMakeLists.txt.bak CMakeLists.txt
+    rm -rf build
+    popd
+
     print_status "All tests completed"
     if [ -n "${FAILURES}" ]; then
         echo "Some failures were detected:"

tools/cmake/build.cmake

@@ -314,7 +314,7 @@ endmacro()
 #
 macro(__build_set_default var default)
     set(_var __${var})
-    if(NOT "${_var}" STREQUAL "")
+    if(NOT "${${_var}}" STREQUAL "")
         idf_build_set_property(${var} "${${_var}}")
     else()
         idf_build_set_property(${var} "${default}")