Re: parallel build failure with .c.o rule interrupted mid-step!

[Greg A. Woods]

I couldn't see the forest for the trees it seems.

Here's a working version:

#
#       tfail.mk:
#
# Demo two-commands-in-one-script failure
#
# Run with:
#
#       rm -rf tfail; mkdir -p tfail; touch tfail/tfail.trace; make 
MAKEOBJDIR=tfail -T tfail.trace -f tfail.mk -j 20; rc=$?; ls -l tfail/*.int; 
exit $rc
#
# or:
#
#       rm -rf tfail; mkdir -p tfail; cd tfail; touch tfail.trace; make -T 
tfail.trace -f ../tfail.mk -j 20; rc=$?; ls -l *.int; exit $rc
#
# When it fails, if it behaves the same as I see in a NetBSD build, then there
# will be one or more .int files, and for each there might also be an empty
# associated .obj file too.
#

.SUFFIXES: .src .obj

OBJECT_TARGET   = ${.TARGET}.int
.src.obj:
        if [ ${.TARGET} = "src-3-5.obj" ]; then  exit 1; fi
        (sleep 0.2; cat ${.IMPSRC}; ) > ${OBJECT_TARGET}
        (sleep 0.1; cat ${OBJECT_TARGET} ) > ${.TARGET} && rm -f 
${OBJECT_TARGET}

.for _i in 0 1 2 3 4 5 6 7 8 9
DIRS += dir-${_i}
PRODS += foo-${_i}
SRCS += srcs-${_i}
.for _j in 0 1 2 3 4 5 6 7 8 9
SRCS.${_i} += src-${_i}-${_j}.src
OBJS.${_i} += src-${_i}-${_j}.obj
.endfor
.endfor

all: .PHONY ${DIRS}

.for _i in 0 1 2 3 4 5 6 7 8 9
#
# pretend each "foo-*" is built in a separate subdirectory so that they can be
# built in parallel
#
dir-${_i}: .PHONY srcs-${_i}
        ${MAKE} -f ${MAKEFILE} foo-${_i}

foo-${_i}: ${OBJS.${_i}}
        cat ${OBJS.${_i}} > ${.TARGET}

srcs-${_i}: .PHONY
        ${MAKE} -f ${MAKEFILE} ${SRCS.${_i}}

.for _j in 0 1 2 3 4 5 6 7 8 9
src-${_i}-${_j}.src:
        echo ${.TARGET} > ${.TARGET}
.endfor
.endfor


--
                                        Greg A. Woods <gwo...@acm.org>

Kelowna, BC     +1 250 762-7675           RoboHack <wo...@robohack.ca>
Planix, Inc. <wo...@planix.com>     Avoncote Farms <wo...@avoncote.ca>

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