On Fri, 18 Oct 2019 13:29:08 -0400 Laura Abbott <labbott@xxxxxxxxxx> wrote: > iio tools fail to build correctly with make parallelization: > > $ make -s -j24 > fixdep: error opening depfile: ./.iio_utils.o.d: No such file or directory > make[1]: *** [/home/labbott/linux_upstream/tools/build/Makefile.build:96: iio_utils.o] Error 2 > make: *** [Makefile:43: iio_event_monitor-in.o] Error 2 > make: *** Waiting for unfinished jobs.... > > This is because iio_utils.o is used across multiple targets. > Fix this by making iio_utils.o a proper dependency. > > Signed-off-by: Laura Abbott <labbott@xxxxxxxxxx> This looks fine to me, but my Makefile foo is decidedly limited. Anyone else want to give a view? It seems sensible to backport this to stable as it seems low risk and will avoid some odd issues for distros. Thanks, Jonathan > --- > I realize that we don't really need the parallelization for tools > because it's so small but when building with the distro we want to use > the same make command and -j wherever possible. > > This same issue also appears in the gpio tools so if this looks like an > okay approach I'll fix it there as well. > --- > tools/iio/Build | 1 + > tools/iio/Makefile | 10 +++++++--- > 2 files changed, 8 insertions(+), 3 deletions(-) > > diff --git a/tools/iio/Build b/tools/iio/Build > index f74cbda64710..8d0f3af3723f 100644 > --- a/tools/iio/Build > +++ b/tools/iio/Build > @@ -1,3 +1,4 @@ > +iio_utils-y += iio_utils.o > lsiio-y += lsiio.o iio_utils.o > iio_event_monitor-y += iio_event_monitor.o iio_utils.o > iio_generic_buffer-y += iio_generic_buffer.o iio_utils.o > diff --git a/tools/iio/Makefile b/tools/iio/Makefile > index e22378dba244..3de763d9ab70 100644 > --- a/tools/iio/Makefile > +++ b/tools/iio/Makefile > @@ -32,20 +32,24 @@ $(OUTPUT)include/linux/iio: ../../include/uapi/linux/iio > > prepare: $(OUTPUT)include/linux/iio > > +IIO_UTILS_IN := $(OUTPUT)iio_utils-in.o > +$(IIO_UTILS_IN): prepare FORCE > + $(Q)$(MAKE) $(build)=iio_utils > + > LSIIO_IN := $(OUTPUT)lsiio-in.o > -$(LSIIO_IN): prepare FORCE > +$(LSIIO_IN): prepare FORCE $(OUTPUT)iio_utils-in.o > $(Q)$(MAKE) $(build)=lsiio > $(OUTPUT)lsiio: $(LSIIO_IN) > $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ > > IIO_EVENT_MONITOR_IN := $(OUTPUT)iio_event_monitor-in.o > -$(IIO_EVENT_MONITOR_IN): prepare FORCE > +$(IIO_EVENT_MONITOR_IN): prepare FORCE $(OUTPUT)iio_utils-in.o > $(Q)$(MAKE) $(build)=iio_event_monitor > $(OUTPUT)iio_event_monitor: $(IIO_EVENT_MONITOR_IN) > $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@ > > IIO_GENERIC_BUFFER_IN := $(OUTPUT)iio_generic_buffer-in.o > -$(IIO_GENERIC_BUFFER_IN): prepare FORCE > +$(IIO_GENERIC_BUFFER_IN): prepare FORCE $(OUTPUT)iio_utils-in.o > $(Q)$(MAKE) $(build)=iio_generic_buffer > $(OUTPUT)iio_generic_buffer: $(IIO_GENERIC_BUFFER_IN) > $(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) $< -o $@
