build-sys: add a rule to print a variable
$ make print-CFLAGS CFLAGS=-fsanitize=address -Og -g 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.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20180104160523.22995-4-marcandre.lureau@redhat.com> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
parent
42a77f1ce4
commit
de1da442ea
5
Makefile
5
Makefile
|
@ -8,9 +8,12 @@ SRC_PATH=.
|
||||||
|
|
||||||
UNCHECKED_GOALS := %clean TAGS cscope ctags dist \
|
UNCHECKED_GOALS := %clean TAGS cscope ctags dist \
|
||||||
html info pdf txt \
|
html info pdf txt \
|
||||||
help check-help \
|
help check-help print-% \
|
||||||
docker docker-% vm-test vm-build-%
|
docker docker-% vm-test vm-build-%
|
||||||
|
|
||||||
|
print-%:
|
||||||
|
@echo '$*=$($*)'
|
||||||
|
|
||||||
# All following code might depend on configuration variables
|
# All following code might depend on configuration variables
|
||||||
ifneq ($(wildcard config-host.mak),)
|
ifneq ($(wildcard config-host.mak),)
|
||||||
# Put the all: rule here so that config-host.mak can contain dependencies.
|
# Put the all: rule here so that config-host.mak can contain dependencies.
|
||||||
|
|
|
@ -510,3 +510,16 @@ default-configs/$TARGET-NAME file as input.
|
||||||
This is the entrypoint used when make recurses to build a single system
|
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
|
or userspace emulator target. It is merely a symlink back to the
|
||||||
Makefile.target in the top level.
|
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.
|
||||||
|
|
Loading…
Reference in New Issue