Hi Marc-André, On 01/04/2018 01:05 PM, Marc-André Lureau wrote: > $ make print-CFLAGS > CFLAGS=-fsanitize=address -Og -g
smiley mode: $ make print-* *=* I didn't understood this one: $ make print-\$ CC tests/qemu-iotests/socket_scm_helper.o LINK tests/qemu-iotests/socket_scm_helper GEN qga/qapi-generated/qga-qapi-types.h GEN qga/qapi-generated/qga-qapi-visit.h GEN qga/qapi-generated/qga-qmp-commands.h CC qga/commands.o ... > Trick from various sources: > https://stackoverflow.com/questions/16467718/how-to-print-out-a-variable-in-makefile > https://www.cmcrossroads.com/article/printing-value-makefile-variable > > Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com> > Reviewed-by: Eric Blake <ebl...@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org> Tested-by: Philippe Mathieu-Daudé <f4...@amsat.org> > --- > Makefile | 5 ++++- > docs/devel/build-system.txt | 13 +++++++++++++ > 2 files changed, 17 insertions(+), 1 deletion(-) > > diff --git a/Makefile b/Makefile > index 1671db3bdd..f26ef1b1df 100644 > --- a/Makefile > +++ b/Makefile > @@ -8,9 +8,12 @@ SRC_PATH=. > > UNCHECKED_GOALS := %clean TAGS cscope ctags dist \ > html info pdf txt \ > - help check-help \ > + help check-help print-% \ > docker docker-% vm-test vm-build-% > > +print-%: > + @echo '$*=$($*)' > + > # All following code might depend on configuration variables > ifneq ($(wildcard config-host.mak),) > # Put the all: rule here so that config-host.mak can contain dependencies. > diff --git a/docs/devel/build-system.txt b/docs/devel/build-system.txt > index 386ef36ee3..52501f2ad9 100644 > --- a/docs/devel/build-system.txt > +++ b/docs/devel/build-system.txt > @@ -510,3 +510,16 @@ default-configs/$TARGET-NAME file as input. > This is the entrypoint used when make recurses to build a single system > or userspace emulator target. It is merely a symlink back to the > Makefile.target in the top level. > + > + > +Useful make targets > +=================== > + > +- help > + > + Print a help message for the most common build targets. > + > +- print-VAR > + > + Print the value of the variable VAR. Useful for debugging the build > + system. >
