CODEWITHSUNDEEP
makefileincludedeferred
Sharad
Sharad

Reputation: 553

deferred include in make

I want to include another makefile after running a particular command because the first command generates that makefile. I tried this

debug2:
    cd bench/${BENCH};  verilator --cc top.v
    include ${BENCH_DIR}/Vtop_classes.mk

In this case make doesn't recognize the include command and gives an error "make: include: Command not found"

if I try to include without tab then it includes before the previous command is executed and so generates error of no such file

debug2:
    cd bench/${BENCH};  verilator --cc top.v
include ${BENCH_DIR}/Vtop_classes.mk

Upvotes: 2

Views: 823

Answers (2)

Chris
Chris

Reputation: 65

INCLUDED-FILES=MakeA MakeB

-include $(INCLUDED-FILES)
# alternatively use sinclude
generate-makefile:
    touch MakeA
    touch MakeB

clean: generate-makefile
    if [ -a MakeA ]; then make clean-A; else echo "No file: MakeA. Run make again."; fi;
    if [ -a MakeB ]; then make clean-B; else echo "No file: MakeB. Run make again."; fi;

GNU make will not report errors because of -include. When make runs the deferred rules and the included files do not exist the shell prints a message "Run make again". The deferred rules in the example call make a second time, so no error is reported.

Because -include does not report errors, make can run the generation rule on the first run. The dependencies are resolved for the second run.

Upvotes: 0

Shmil The Cat
Shmil The Cat

Reputation: 4668

Add - before : -include ${BENCH_DIR}/Vtop_classes.mk

Upvotes: 1

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