HELP_COMPILATION_VARIABLES += \
"   USE_VPD                = set to '1' to build VCS simulator to emit VPD instead of FSDB."

HELP_SIMULATION_VARIABLES += \
"   USE_VPD                = set to '1' to run VCS simulator emitting VPD instead of FSDB."

ifndef USE_VPD
get_waveform_flag=+fsdbfile=$(1).fsdb
else
get_waveform_flag=+vcdplusfile=$(1).vpd
endif

# If ntb_random_seed unspecified, vcs uses 1 as constant seed.
# Set ntb_random_seed_automatic to actually get a random seed
ifdef RANDOM_SEED
SEED_FLAG=+ntb_random_seed=$(RANDOM_SEED)
else
SEED_FLAG=+ntb_random_seed_automatic
endif

CLOCK_PERIOD ?= 1.0
RESET_DELAY ?= 777.7

#----------------------------------------------------------------------------------------
# gcc configuration/optimization
#----------------------------------------------------------------------------------------
include $(base_dir)/sims/common-sim-flags.mk

VCS_CXXFLAGS = $(SIM_CXXFLAGS)
VCS_LDFLAGS = $(SIM_LDFLAGS)

# vcs requires LDFLAGS to not include library names (i.e. -l needs to be separate)
VCS_CC_OPTS = \
	-CFLAGS "$(VCS_CXXFLAGS)" \
	-LDFLAGS "$(filter-out -l%,$(VCS_LDFLAGS))" \
	$(filter -l%,$(VCS_LDFLAGS))

VCS_NONCC_OPTS = \
	-notice \
	-line \
	+lint=all,noVCDE,noONGS,noUI \
	-error=PCWM-L \
	-error=noZMMCM \
	-timescale=1ns/10ps \
	-quiet \
	-q \
	+rad \
	+vcs+lic+wait \
	+vc+list \
	-f $(sim_common_files) \
	-sverilog +systemverilogext+.sv+.svi+.svh+.svt -assert svaext +libext+.sv \
	+v2k +verilog2001ext+.v95+.vt+.vp +libext+.v \
	-debug_pp \
	+incdir+$(GEN_COLLATERAL_DIR)

VCS_PREPROC_DEFINES = \
	+define+VCS

ifndef USE_VPD
VCS_PREPROC_DEFINES += +define+FSDB
endif