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configure: Detect kcov support and introduce CONFIG_KCOV

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kcov is kernel code coverage tracing tool. It requires kernel 4.4+
compiled with certain kernel options.

This patch checks if kcov header "sys/kcov.h" is present on build
machine, and stores the result in variable CONFIG_KCOV, meant to
be used in linux-user code related to the support for three ioctls
that were introduced at the same time as the mentioned header
(their definition was a part of the first version of that header).

Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <1579214991-19602-11-git-send-email-aleksandar.markovic@rt-rk.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Aleksandar Markovic 2020-01-16 23:49:49 +01:00 committed by Laurent Vivier
parent 08e3ce59fc
commit db37dd89d6
1 changed files with 9 additions and 0 deletions
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9
configure vendored
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@ -4761,6 +4761,12 @@ if compile_prog "" "" ; then
syncfs=yes
fi
# check for kcov support (kernel must be 4.4+, compiled with certain options)
kcov=no
if check_include sys/kcov.h ; then
kcov=yes
fi
# Check we have a new enough version of sphinx-build
has_sphinx_build() {
# This is a bit awkward but works: create a trivial document and
@ -6874,6 +6880,9 @@ fi
if test "$syncfs" = "yes" ; then
echo "CONFIG_SYNCFS=y" >> $config_host_mak
fi
if test "$kcov" = "yes" ; then
echo "CONFIG_KCOV=y" >> $config_host_mak
fi
if test "$inotify" = "yes" ; then
echo "CONFIG_INOTIFY=y" >> $config_host_mak
fi