Linux build: Use sysroot when calculating dependencies

third_party/dpkg-dev/ostable

Index: third_party/dpkg-dev/ostable
diff --git a/third_party/dpkg-dev/ostable b/third_party/dpkg-dev/ostable
new file mode 100644
index 0000000000000000000000000000000000000000..29d3843640006c340ccb6c6c07a9eee3f32a9cc0
--- /dev/null
+++ b/third_party/dpkg-dev/ostable
@@ -0,0 +1,38 @@
+# This file contains the table of known operating system names.
+#
+# Architecture names are formed as a combination of the system name
+# (from this table) and CPU name (from cputable) after mapping from
+# the Debian triplet (from triplettable).
+#
+# Column 1 is the Debian name for the system, used to form the system part
+# in the Debian triplet.
+# Column 2 is the GNU name for the system, used to output build and host
+# targets in ‘dpkg-architecture’.
+# Column 3 is an extended regular expression used to match against the
+# system part of the output of the GNU config.guess script.
+#
+# <Debian name>		<GNU name>		<config.guess regex>
+uclibceabi-linux	linux-uclibceabi	linux[^-]*-uclibceabi
+uclibc-linux		linux-uclibc		linux[^-]*-uclibc
+musleabihf-linux	linux-musleabihf	linux[^-]*-musleabihf
+musl-linux		linux-musl		linux[^-]*-musl
+gnueabihf-linux		linux-gnueabihf		linux[^-]*-gnueabihf
+gnueabi-linux		linux-gnueabi		linux[^-]*-gnueabi
+gnuabin32-linux		linux-gnuabin32		linux[^-]*-gnuabin32
+gnuabi64-linux		linux-gnuabi64		linux[^-]*-gnuabi64
+gnuspe-linux		linux-gnuspe		linux[^-]*-gnuspe
+gnux32-linux		linux-gnux32		linux[^-]*-gnux32
+gnulp-linux		linux-gnulp		linux[^-]*-gnulp
+gnu-linux		linux-gnu		linux[^-]*(-gnu.*)?
+gnu-kfreebsd		kfreebsd-gnu		kfreebsd[^-]*(-gnu.*)?
+gnu-knetbsd		knetbsd-gnu		knetbsd[^-]*(-gnu.*)?
+gnu-kopensolaris	kopensolaris-gnu	kopensolaris[^-]*(-gnu.*)?
+gnu-hurd		gnu			gnu[^-]*
+bsd-darwin		darwin			darwin[^-]*
+bsd-freebsd		freebsd			freebsd[^-]*
+bsd-netbsd		netbsd			netbsd[^-]*
+bsd-openbsd		openbsd			openbsd[^-]*
+sysv-solaris		solaris			solaris[^-]*
+uclibceabi-uclinux	uclinux-uclibceabi	uclinux[^-]*-uclibceabi
+uclibc-uclinux		uclinux-uclibc		uclinux[^-]*(-uclibc.*)?
+tos-mint		mint			mint[^-]*