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Makefile: simpler/faster "make help"

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Using obscure black magic introduced in eaa2ddbb767 :)

In an out-of-tree directory, running "../configure && make help" will generate
some required files (.mak), then clone some submodules, compile at least
the capstone submodule, generate QMP and Trace files, and finally display
the help.

On an outdated computer (Sun Blade workstation), running "make help" took
more than 5h :) With this patch it took roughly 37min.

Suggested-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20171108032052.20029-1-f4bug@amsat.org>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2017-11-08 00:20:52 -03:00 committed by Paolo Bonzini
parent a2e6ffab97
commit b8e535ae8a
1 changed files with 1 additions and 1 deletions
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2
Makefile
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@ -6,7 +6,7 @@ BUILD_DIR=$(CURDIR)
# Before including a proper config-host.mak, assume we are in the source tree
SRC_PATH=.
UNCHECKED_GOALS := %clean TAGS cscope ctags docker docker-%
UNCHECKED_GOALS := %clean TAGS cscope ctags docker docker-% help
# All following code might depend on configuration variables
ifneq ($(wildcard config-host.mak),)