From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37218) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eX82m-000794-RQ for qemu-devel@nongnu.org; Thu, 04 Jan 2018 11:07:01 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eX82j-0002x7-6a for qemu-devel@nongnu.org; Thu, 04 Jan 2018 11:07:00 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39304) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eX82j-0002vY-14 for qemu-devel@nongnu.org; Thu, 04 Jan 2018 11:06:57 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 2E6A2C056870 for ; Thu, 4 Jan 2018 16:06:56 +0000 (UTC) From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Date: Thu, 4 Jan 2018 17:05:08 +0100 Message-Id: <20180104160523.22995-4-marcandre.lureau@redhat.com> In-Reply-To: <20180104160523.22995-1-marcandre.lureau@redhat.com> References: <20180104160523.22995-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH v3 03/18] build-sys: add a rule to print a variable List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com, famz@redhat.com, eblake@redhat.com, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , "Daniel P. Berrange" $ make print-CFLAGS CFLAGS=3D-fsanitize=3Daddress -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-Andr=C3=A9 Lureau Reviewed-by: Eric Blake --- 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=3D. =20 UNCHECKED_GOALS :=3D %clean TAGS cscope ctags dist \ html info pdf txt \ - help check-help \ + help check-help print-% \ docker docker-% vm-test vm-build-% =20 +print-%: + @echo '$*=3D$($*)' + # All following code might depend on configuration variables ifneq ($(wildcard config-host.mak),) # Put the all: rule here so that config-host.mak can contain dependencie= s. 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 +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +- 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. --=20 2.15.1.355.g36791d7216