Package: make
Version: 3.82-1
Severity: important
Control: block 720706 by -1
With the following 3 makefiles:
###################### Makefile #############
all: a b
a:
$(MAKE) -C data
b:
$(MAKE) -C src
clean:
$(MAKE) -C src clean
$(MAKE) -C data clean
.PHONY: all a b clean
################## src/Makefile #############
all: A1 A2 A3 A4 A5 A6 A7
A1 A2 A3 A4 A5 A6 A7:
sleep 10 > $@
clean:
-rm -f A*
.PHONY: all clean
################# data/Makefile #############
SHELL = /bin/bash
# Give directory a/ a chance to start anything:
test := $(shell sleep 1)
.PHONY: all clean
list = B1 B2 B3 B4 B5
all: $(list)
B3: B1 B2
B5: B3
B%:
@for pred in $^ ; do printf %s "$@: checking $$pred: " ; if test -f
$$pred ; then echo found ; else echo "not found" ; exit 1 ; fi ; done
echo $^ > $@
.SECONDARY: $(list)
clean:
rm -f B*
#############################################
and running make -j8 in the top level directory, I get:
$ make -j8
make -C data
make -C src
make[1]: Entering directory `/mydir/src'
sleep 10 > A1
sleep 10 > A2
sleep 10 > A3
sleep 10 > A4
sleep 10 > A5
sleep 10 > A6
sleep 10 > A7
make[1]: Entering directory `/mydir/data'
echo > B1
echo > B2
echo > B4
B5: checking B3: not found
make[1]: *** [B5] Error 1
[...]
That means despite make knowing that B3 is a prerequisite to B5,
B5 is run with B3 not yet done in this case.
-- System Information:
Debian Release: jessie/sid
Architecture: amd64 (x86_64)
Versions of packages make depends on:
ii libc6 2.17-92+b1
-- no debconf information
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