[Qemu-devel] [PATCH 03/12] build-sys: add a rule to print a variable

[Marc-André Lureau]

$ 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 <address@hidden>
---
 Makefile | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index ab0354c153..80683e8c8b 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,10 @@ BUILD_DIR=$(CURDIR)
 # Before including a proper config-host.mak, assume we are in the source tree
 SRC_PATH=.
 
-UNCHECKED_GOALS := %clean TAGS cscope ctags docker docker-% help
+UNCHECKED_GOALS := %clean TAGS cscope ctags docker docker-% help print-%
+
+print-%:
+       @echo '$*=$($*)'
 
 # All following code might depend on configuration variables
 ifneq ($(wildcard config-host.mak),)
-- 
2.15.1.355.g36791d7216