While pxCore is compiled, enviironment CXXFLAGS are not considered

[vertexodessa]

Eugene recently noticed that pxCore ignores environment compilation flags.
Here is a quote from the makefile:

CXXFLAGS=-Wall -Wextra -g $(SEARCH) -DRT_PLATFORM_LINUX -D$(PX_PLATFORM) -DENABLE_RT_NODE

CXXFLAGS2=-fPIC -Wall -Wextra -g $(SEARCH) -DRT_PLATFORM_LINUX -D$(PX_PLATFORM) -DENABLE_RT_NODE -DRUNINMAIN

ifdef PXVERSION
CXXFLAGS=$(CXXFLAGS2) -DPX_SCENE_VERSION=$(PXVERSION)
else
CXXFLAGS=$(CXXFLAGS2)
endif

CXXFLAGS variable is being overwritten by predefined value and system variable is not used.