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-rw-r--r--mk/elftoolchain.os.mk22
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diff --git a/mk/elftoolchain.os.mk b/mk/elftoolchain.os.mk
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+#
+# $Id: elftoolchain.os.mk 2068 2011-10-26 15:49:07Z jkoshy $
+#
+
+# OS specific build instructions
+
+.if !defined(OS_HOST)
+
+# Determine the host operating system flavor.
+OS_HOST != uname -s
+
+# Bring in OS-specific Makefiles, if they exist
+.if exists(${TOP}/mk/os.${OS_HOST}.mk)
+.include "${TOP}/mk/os.${OS_HOST}.mk"
+.endif
+
+# Bring in per-subproject OS-specific Makefiles, if they exist
+.if exists(${.CURDIR}/os.${OS_HOST}.mk)
+.include "${.CURDIR}/os.${OS_HOST}.mk"
+.endif
+
+.endif