Debug symbols not stripped from resulting binaries in Yocto

Background

I am trying to build a custom software inside Yocto build. Software is built by CMake.

The following is my recipe - customsoftware.bb:

SRCBRANCH = "master"
SRCREV = "master"

MY_SRC = "OMITTED"

SRC_URI = "${MY_SRC};branch=${SRCBRANCH}"

# libraries dependencies
DEPENDS += "boost"

S = "${WORKDIR}/git"
B = "${WORKDIR}/build"

PARALLEL_MAKE ?= "-j 1"

inherit cmake

# My CMake Options
EXTRA_OECMAKE+=" -DSOME_OPTION=ON"

# I want unix makefiles instead on ninja build
OECMAKE_GENERATOR="Unix Makefiles"

The following is a watered down version of my cmake project - CMakeLists.txt

Please note: I have omitted irrelevant parts for brevity

cmake_minimum_required(VERSION 3.0.0)

#---------------------------------------------------------------------------------------
# set default build to release
#---------------------------------------------------------------------------------------
if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose Release or Debug" FORCE)
endif()

file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/dist/)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/dist/bin)

set(CMAKE_DISABLE_IN_SOURCE_BUILD ON)
set(CMAKE_DISABLE_SOURCE_CHANGES  ON)

if ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
    message(FATAL_ERROR "
    ${BoldRed}Error:${ColourReset} In-source builds are not allowed. You should create separate directory for build files.
    ${Magenta}CMAKE_BINARY_DIR${ColourReset}(${CMAKE_SOURCE_DIR}) must be different from ${Magenta}CMAKE_SOURCE_DIR${ColourReset}(${CMAKE_BINARY_DIR})
    ")
endif ()

project(myapp)

find_package(Boost REQUIRED COMPONENTS thread) 

add_executable(${PROJECT_NAME}
  ${HEADERS}
  ${SOURCES}
)

target_link_libraries(${PROJECT_NAME} ${Boost_LIBRARIES})

#Copy entire contents of dist/ to /opt/myapp
install(DIRECTORY ${CMAKE_BINARY_DIR}/dist/
    DESTINATION /opt/myapp
)

I have appended my recipe to image.

Issue

When I ran du -h tmp/work/.../<customsoftware>/build/dist/bin binary size is 80MB. Also, after deploying to target system binary size is 80MB.

UPDATE

As suggested in comments, binaries at tmp/work/.../<customsoftware>/image are not stripped. However, binaries at tmp/work/.../<customsoftware>/packages-split are stripped.

If I ran make in source of app - not through recipe and outside yocto - binary size is 1.7MB

Question

If I remember correctly, OE build will strip debug symbols from resulting binaries.

Why does my binary still get deployed with debug symbols? What have I missed?

How can I make sure only stripped - Release type - binary is deployed?

Explicitly specifying package types and inheriting pkgconfig solved my issue. Updated recipe:

SRCBRANCH = "master"
SRCREV = "master"

MY_SRC = "OMITTED"

SRC_URI = "${MY_SRC};branch=${SRCBRANCH}"

DEPENDS += "boost"

S = "${WORKDIR}/git"

PARALLEL_MAKE ?= "-j 1"

inherit pkgconfig cmake

EXTRA_OECMAKE+=" -DSOME_OPTION"
OECMAKE_GENERATOR="Unix Makefiles"

# Specify package types
PACKAGES = "${PN}-dbg ${PN}"


FILES_${PN}-dbg += "\
    <INSTALL_PATH>/.debug \
    "

FILES_${PN} += "\
    <INSTALL_PATH>/* \
    "