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um: link with -lpthread

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commit a7df4716d1 upstream.

Similarly to commit fb1770aa78, with gcc 5
on Ubuntu and CONFIG_STATIC_LINK=y I was seeing these linker errors:

/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/librt.a(timer_create.o): In function `__timer_create_new':
(.text+0xcd): undefined reference to `pthread_once'
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/librt.a(timer_create.o): In function `__timer_create_new':
(.text+0x126): undefined reference to `pthread_attr_init'
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/librt.a(timer_create.o): In function `__timer_create_new':
(.text+0x168): undefined reference to `pthread_attr_setdetachstate'
[...]

Obviously we also need -lpthread for librt.a.

Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vegard Nossum 2015-12-31 17:06:17 +01:00 committed by Greg Kroah-Hartman
parent cfcae394f6
commit 1b4d88b5de
1 changed files with 1 additions and 1 deletions
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2
scripts/link-vmlinux.sh
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@ -62,7 +62,7 @@ vmlinux_link()
-Wl,--start-group \
${KBUILD_VMLINUX_MAIN} \
-Wl,--end-group \
-lutil -lrt ${1}
-lutil -lrt -lpthread ${1}
rm -f linux
fi
}