util-linux: libblkid needs fork(), disable on !MMU
The libblkid library in util-linux uses fork. While it seems potentially possible to disable the parts of the library that use fork (the only parts using fork are parts related to LVM and Device Mapper, which are said to be legacy as they are replaced by sysfs based scanning, instead of having to fork to run a separate process). However, since libblkid is used by: - e2fsprogs, which uses lots of fork all over the place - udev, which most likely will also need fork There is not much point in making libblkid fork-less. As a consequence, this commit makes util-linux/libblkid unavailable on non-MMU architectures, and propagates the relevant dependency to the reverse dependencies of libblkid. This fixes the e2fsprogs build failure seen on Blackfin. The failure was due to a configure test of e2fsprogs which was trying to link a small test program against libblkid, which failed because there was an undefined reference to fork() in the libblkid code. Fixes: http://autobuild.buildroot.net/results/ee2c1568d16ac040011dd4d6d8b543ff9e9e2622/ Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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@ -6,7 +6,7 @@ config BR2_PACKAGE_CRYPTSETUP
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select BR2_PACKAGE_E2FSPROGS
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select BR2_PACKAGE_GETTEXT if BR2_NEEDS_GETTEXT_IF_LOCALE
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depends on BR2_LARGEFILE # lvm2, util-linux
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depends on BR2_USE_MMU # lvm2
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depends on BR2_USE_MMU # lvm2, e2fsprogs
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depends on !BR2_PREFER_STATIC_LIB # lvm2
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depends on BR2_USE_WCHAR # util-linux
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help
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@ -3,6 +3,7 @@ config BR2_PACKAGE_E2FSPROGS
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bool "e2fsprogs"
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depends on BR2_LARGEFILE
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depends on BR2_USE_WCHAR # util-linux
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depends on BR2_USE_MMU # util-linux/libblkid
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select BR2_PACKAGE_UTIL_LINUX
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select BR2_PACKAGE_UTIL_LINUX_LIBBLKID
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select BR2_PACKAGE_UTIL_LINUX_LIBUUID
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@ -5,6 +5,7 @@ config BR2_PACKAGE_UDEV
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depends on BR2_LARGEFILE # util-linux
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depends on BR2_USE_WCHAR # util-linux
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depends on !BR2_PREFER_STATIC_LIB # kmod
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depends on BR2_USE_MMU # util-linux/libblkid
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select BR2_PACKAGE_UTIL_LINUX
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select BR2_PACKAGE_UTIL_LINUX_LIBBLKID
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select BR2_PACKAGE_KMOD
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@ -14,6 +14,7 @@ if BR2_PACKAGE_UTIL_LINUX
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config BR2_PACKAGE_UTIL_LINUX_LIBBLKID
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select BR2_PACKAGE_UTIL_LINUX_LIBUUID
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depends on BR2_USE_MMU # fork
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bool "libblkid"
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help
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Install libblkid.
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@ -22,6 +23,7 @@ config BR2_PACKAGE_UTIL_LINUX_LIBMOUNT
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select BR2_PACKAGE_UTIL_LINUX_LIBBLKID
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# libc lacks UTIME_NOW & UTIME_COMMIT
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depends on !(BR2_microblazeel || BR2_microblazebe)
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depends on BR2_USE_MMU # util-linux/libblkid
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bool "libmount"
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help
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Install libmount.
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@ -127,6 +127,7 @@ config BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_UDEV
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depends on BR2_LARGEFILE # udev
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depends on BR2_USE_WCHAR # udev
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depends on !BR2_PREFER_STATIC_LIB # udev -> kmod
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depends on BR2_USE_MMU # udev -> util-linux/libblkid
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select BR2_PACKAGE_UDEV
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comment "udev needs a toolchain w/ largefile, wchar"
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