Thomas Petazzoni 1727e89e9a perf: add kernel version checks ... perf is only available since kernel 2.6.31, so if we can't find tools/perf/Makefile, error out and tell the user about this. perf without libelf can only be built since kernel 3.7, so error out and tell the user about this if he's trying to build perf from a < 3.7 kernel without libelf. Unfortunately, those tests can only be build-time checks as we either need to know the real kernel version (i.e, using LINUX_VERSION would not be correct as it can be a Git commit ID, or Git tag), or have access to the kernel sources themselves. So we can't prevent those invalid situations at the configuration, we can only nicely tell the user at build time. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>		2013-01-07 21:40:20 +01:00
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Config.in
perf.mk	perf: add kernel version checks	2013-01-07 21:40:20 +01:00