Buildroot clean my dependencies after change my source code

Im using buildroot to make a custom linux image, and it is working.

The problem is when i run "make" to finish the image after change my package "source code", because it cleans my custom package dependencies and all header include are not found.

I have a dependency with structure:

################################################################################
#
# hello
#
################################################################################

HELLO_VERSION = 1.0
HELLO_SITE = ./package/hello/src
HELLO_SITE_METHOD = local
HELLO_DEPENDENCIES += directfb libogg libvorbis mpg123 sdl2 sdl2_image sdl2_gfx sdl2_ttf sdl2_mixer sdl2_net

define HELLO_BUILD_CMDS
    $(MAKE) CC="$(TARGET_CC)" CXX="$(TARGET_CXX)" LD="$(TARGET_LD)" -C $(@D)
endef

define HELLO_INSTALL_TARGET_CMDS
    $(INSTALL) -D -m 0755 $(@D)/hello $(TARGET_DIR)/usr/bin
    mkdir -p $(TARGET_DIR)/opt/app
    cp -r $(@D)/assets $(TARGET_DIR)/opt/app
endef

$(eval $(generic-package))

When i run "make hello-rebuild && make", i got error that all SDL includes don't exists.

When i got this error i rebuild only the dependencies packages with "make sdl2-rebuild", "make sdl2_mixer-rebuild", etc.

Can anyone help me understand how i can solve it?

Thanks.

Solution

After post in other places the same answer, a buildroot user answer with correct way, that is use @STAGING directory when compile instead of @TARGET directory.

In my makefile i compile it using @TARGET_DIR/usr/[folder], but the correct is @STAGING_DIR/usr[folder].

Thanks.