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      1 # $NetBSD: varname-dot-make-jobs.mk,v 1.5 2023/09/10 16:25:32 sjg Exp $
      2 #
      3 # Tests for the special .MAKE.JOBS variable, which is defined in jobs mode
      4 # only.  There it contains the number of jobs that may run in parallel.
      5 
      6 .MAIN: all
      7 
      8 echo: .PHONY
      9 	@echo ${.MAKE.JOBS:Uundefined}
     10 
     11 all:
     12 	@${MAKE} -r -f ${MAKEFILE} echo
     13 	@${MAKE} -r -f ${MAKEFILE} echo -j1
     14 	@${MAKE} -r -f ${MAKEFILE} echo -j5
     15 	@${MAKE} -r -f ${MAKEFILE} echo -j20
     16 	@${MAKE} -r -f ${MAKEFILE} echo -j00000000000000000000000000000001
     17 
     18 .if !make(echo) && ${.MAKE.JOBS.C} == "yes"
     19 # These results will not be static, we need NCPU
     20 # to compute expected results.
     21 all:	jC
     22 
     23 NCPU!= ${MAKE} -r -f /dev/null -jC -V .MAKE.JOBS
     24 
     25 # If -j arg is floating point or ends in C;
     26 # .MAKE.JOBS is a multiple of _SC_NPROCESSORS_ONLN
     27 # No news is good news here.
     28 jCvals ?= 1 1.2 2
     29 
     30 jC:
     31 	@for j in ${jCvals}; do \
     32 	e=`echo "${NCPU} * $$j" | bc | sed 's/\.[0-9]*//'`; \
     33 	g=`${MAKE} -r -f /dev/null -V .MAKE.JOBS -j$${j}C`; \
     34 	test $$g = $$e || echo "$$g != $$e"; \
     35 	done
     36 
     37 .endif
     38 
     39 # expect: undefined
     40 # expect: 1
     41 # expect: 5
     42 # expect: 20
     43 # expect: 1
     44