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configure: make source tree build more robust
When source directory can be arrived at by two paths, configure might misdetect an out of tree build. The simplest way to trigger the problem is running configure using a full path. E.g. (<firstpath> refers to qemu source tree): ln -s <firstpath> <secondpath> cd <firstpath> <secondpath>/configure A more practical way is when make runs configure automatically: 1. cd <firstpath>/; ./configure SRC_PATH=<firstpath>/ is written into config_host.mak 2. cd <secondpath>/; touch configure; make make now runs <firstpath>/configure, so configure assumes it's an out of tree build When this happens configure overwrites parts of the current tree with symlinks. Make the test more robust: look for configure in the current directory. If there - we know it's a source build! Signed-off-by: Michael S. Tsirkin <[email protected]>
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