It is only when this string is used by a command that it will maybe trigger some globbing.
Giving a value like *.c does not entail any expansion. In the above answers, it is important to understand what is meant by "values are expanded at declaration/use time". If A := $(A) $(B) were used, the result would not be the exact same as using += because B is expanded with := whereas += would not cause B to be expanded.
If something like HELLO_WORLD = $(HELLO_WORLD) world! were used, recursion would result, which would most likely end the execution of your Makefile. The resulting value is expanded when it is used I think. If the variable was previously set with :=, it is expanded I think.
Using += is like using =, but instead of replacing the value, the value is appended to the current one, with a space in between. If the variable was previously assigned a blank value ( VAR=), it is still considered set I think. Using ?= assigns the variable a value iff the variable was not previously assigned. However, instead of the value being expanded when it is used, it is expanded during the assignment. This value will be expanded when it is used. If the variable already had a value, it is replaced. You probably don’t want to modify this.Using = causes the variable to be assigned a value. VERSION The version of the Cocotb installation. SIM_ROOT The root directory of the Cocotb installation. 8088, data will be presented at This needs the cherrypy and dowser Python modules installed. HTTP port to use for debugging Python’s memory usage. COCOTB_SCHEDULER_DEBUG Enable additional log output of the coroutine scheduler. Valid settings are: VALUE_ERROR raise a ValueError exception ZEROS resolve to 0 ONES resolve to 1 RANDOM randomly resolve to a 0 or a 1
#MAKEFILE VS RUNJS HOW TO#
COCOTB_RESOLVE_Xĭefines how to resolve bits with a value of X, Z, U or W when being converted to integer. COCOTB_LOG_LEVEL Default logging level to use. You can also use the cocotb.hook decorator to mark a function to be run before test code. COCOTB_HOOKS A comma-separated list of modules that should be executed before the first test. See the profile Make target in the endian_swapper example on how to set this up. Will be written which contains statistics about the cumulative time spent in the functions.įrom this, a callgraph diagram can be generated with gprof2dot and graphviz. COCOTB_ENABLE_PROFILINGĮnable performance analysis of the Python portion of Cocotb.
#MAKEFILE VS RUNJS SIMULATOR#
If set, Cocotb will print the process ID (PID) to attach to and wait the specified time beforeĪctually letting the simulator run. You can set the environment variable COCOTB_ATTACH to a pause time value in seconds. If not provided, the default scratch directory is sim_build.Īdditional Environment Variables ¶ COCOTB_ATTACH In order to give yourself time to attach a debugger to the simulator process before it starts to run, The path is relative to the Makefile location. SIM_BUILD Use to define a scratch directory for use by the simulator. COCOTB_NVC_TRACE Set this to 1 to enable display of VHPI traces when using the nvc VHDL simulator. CUSTOM_SIM_DEPS Use to add additional dependencies to the simulation target. CUSTOM_COMPILE_DEPS Use to add additional dependencies to the compilation target useful for defining additional rules to run pre-compilation or if the compilation phase depends on files other than the RTL sources listed in VERILOG_SOURCES or VHDL_SOURCES. EXTRA_ARGS Passed to both the compile and execute phases of simulators with two rules, or passed to the single compile and run command for simulators which don’t have a distinct compilation stage. Only applies to simulators with a separate compilation stage (currently Icarus, VCS and GHDL). SIM_ARGS Any arguments or flags to pass to the execution of the compiled simulation. Only applies to simulators with a separate compilation stage (currently Icarus and VCS). COMPILE_ARGS Any arguments or flags to pass to the compile stage of the simulation. VHDL_SOURCES A list of the VHDL source files to include. Attempts to include a simulator specific makefile from cocotb/makefiles/makefile.$(SIM) VERILOG_SOURCES A list of the Verilog source files to include. SIM Selects which simulator Makefile to use.
Make Variables ¶ GUI Set this to 1 to enable the GUI mode in the simulator (if supported).
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