.PHONY: $(DIRS)

LDLPNAME = LD_LIBRARY_PATH
ifeq ($(OSTYPE),darwin)
	LDLPNAME = DYLD_LIBRARY_PATH
endif

WHICH_ROOT_CONFIG = $(shell which root-config)
WHICH_CERNLIB = $(shell which cernlib)
LD_HAS_XERCES = $(findstring $(XERCESCROOT)/lib,$($(LDLPNAME)))
LD_HAS_ROOT = $(findstring $(ROOTSYS)/lib,$($(LDLPNAME)))

all install depclean clean pristine relink: $(DIRS)

$(DIRS): env_check
	$(MAKE) -C $@ $(MAKECMDGOALS)

env_check:
ifndef XERCESCROOT
	@echo error: XERCESCROOT not defined ; exit 1
else
	@echo XERCESCROOT = $(XERCESCROOT)
endif
ifeq ($(strip $(LD_HAS_XERCES)),)
	@echo error: $(XERCESCROOT)/lib not in $(LDLPNAME) ; exit 1
else
	@echo XERCES in $(LDLPNAME) = $(LD_HAS_XERCES)
endif
ifndef ROOTSYS
	@echo error: ROOTSYS not defined ; exit 1
else
	@echo ROOTSYS = $(ROOTSYS)
endif
ifeq ($(strip $(WHICH_ROOT_CONFIG)),)
	@echo error: root-config not in path ; exit 1
else
	@echo WHICH_ROOT_CONFIG = $(WHICH_ROOT_CONFIG)
endif
ifeq ($(strip $(LD_HAS_ROOT)),)
	@echo error: $(ROOTSYS)/lib not in $(LDLPNAME) ; exit 1
else
	@echo ROOT in $(LDLPNAME) = $(LD_HAS_XERCES)
endif
ifndef JANA_HOME
	@echo error: JANA_HOME not defined ; exit 1
else
	@echo JANA_HOME = $(JANA_HOME)
endif
ifndef HDDS_HOME
	@echo error: HDDS_HOME not defined ; exit 1
else
	@echo HDDS_HOME = $(HDDS_HOME)
endif
ifndef CERN
	@echo ==============================================
	@echo WARNING: CERN not defined!
	@echo Build proceeding, but hdgeant will not be made
	@echo ==============================================
else  # CERN

	@echo CERN = $(CERN)

ifndef CERN_LEVEL
	@echo error: CERN_LEVEL not defined ; exit 1
else
	@echo CERN_LEVEL = $(CERN_LEVEL)
endif
ifeq ($(strip $(WHICH_CERNLIB)),)
	@echo error: cernlib not in path ; exit 1
else
	@echo WHICH_CERNLIB = $(WHICH_CERNLIB)
endif
endif  # CERN


# right now these two dependencies are linked...
# AmpTools is the only package that depends on CLHEP

	@echo AMPTOOLS = $(AMPTOOLS)
	@echo CLHEP = $(CLHEP)

ifdef AMPTOOLS
ifdef CLHEP
AMPTOOLS_CLHEP = 1
endif
endif

ifndef AMPTOOLS_CLHEP
	@echo ==============================================
	@echo WARNING: AMPTOOLS or CLHEP is not defined
	@echo Build proceeding, but various amplitude
	@echo analysis libraries and generators will not
	@echo be built.
	@echo ==============================================
endif