/usr/src/gcc-5/debian/patches/kfreebsd-boehm-gc.diff is in gcc-5-source 5.3.1-14ubuntu2.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | # DP: boehm-gc: use mmap instead of brk also on kfreebsd-*.
Index: b/src/boehm-gc/configure.host
===================================================================
--- a/src/boehm-gc/configure.host
+++ b/src/boehm-gc/configure.host
@@ -41,7 +41,7 @@ else
fi
case "${host}" in
- *-linux*)
+ *-linux*|*-kfreebsd*-gnu*)
gc_use_mmap=yes
;;
esac
|