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[Qemu-devel] [PULL 11/52] build-sys: add a rule to print a variable
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PULL 11/52] build-sys: add a rule to print a variable |
Date: |
Fri, 12 Jan 2018 12:30:35 +0100 |
From: Marc-André Lureau <address@hidden>
$ 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>
Reviewed-by: Eric Blake <address@hidden>
Message-Id: <address@hidden>
Tested-by: Philippe Mathieu-Daudé <address@hidden>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
Makefile | 5 ++++-
docs/devel/build-system.txt | 13 +++++++++++++
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
index 1671db3..f26ef1b 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 386ef36..52501f2 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.
--
1.8.3.1
- [Qemu-devel] [PULL 05/52] i386/cpu/kvm: look at PMU's CPUID before setting MSRs, (continued)
- [Qemu-devel] [PULL 05/52] i386/cpu/kvm: look at PMU's CPUID before setting MSRs, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 07/52] chardev: let g_idle_add() be with chardev gcontext, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 08/52] chardev: introduce qemu_chr_timeout_add_ms(), Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 15/52] build-sys: add some sanitizers when --enable-debug if possible, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 10/52] build-sys: silence make by default or V=0, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 12/52] build-sys: compile with -Og or -O1 when --enable-debug, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 09/52] build-sys: fix qemu-ga -pthread linking, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 14/52] tests/docker: add test-debug, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 16/52] tests: fix check-qobject leak, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 13/52] tests/docker: add some sanitizers to fedora dockerfile, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 11/52] build-sys: add a rule to print a variable,
Paolo Bonzini <=
- [Qemu-devel] [PULL 17/52] vl: fix direct firmware directories leak, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 18/52] readline: add a free function, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 20/52] crypto: fix stack-buffer-overflow error, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 19/52] tests: fix migration-test leak, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 23/52] ucontext: annotate coroutine stack for ASAN, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 25/52] mips: fix potential fopen(NULL,...), Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 21/52] qemu-config: fix leak in query-command-line-options, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 22/52] tests: fix qmp-test leak, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 26/52] disas/s390: fix global-buffer-overflow, Paolo Bonzini, 2018/01/12
- [Qemu-devel] [PULL 27/52] scsi-disk: release AioContext in unaligned WRITE SAME case, Paolo Bonzini, 2018/01/12