git subtree pull --prefix shared/c-rbtree git@github.com:c-util/c-rbtree.git master --squash

Usually, we don't want to build with NDEBUG (because disabling regular
assertions is an untested configuration). Still, when we do, we get
compiler warnings.

Non-debug builds break with a compiler warning:

  $ ccache cc -Ishared/a4d2686@@n-acd@sta -Ishared -I../shared -I../shared/c-siphash/src -I../shared/c-list/src -I../shared/c-rbtree/src -fdiagnostics-color=always -DNDEBUG -pipe -D_FILE_OFFSET_BITS=64 -Werror -std=gnu11 -fdata-sections -ffunction-sections -O2 -g -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fPIC -D_GNU_SOURCE -DSO_ATTACH_BPF=50 -std=c11 -Wno-pointer-arith -Wno-vla -MD -MQ 'shared/a4d2686@@n-acd@sta/n-acd_src_n-acd-probe.c.o' -MF 'shared/a4d2686@@n-acd@sta/n-acd_src_n-acd-probe.c.o.d' -o 'shared/a4d2686@@n-acd@sta/n-acd_src_n-acd-probe.c.o' -c ../shared/n-acd/src/n-acd-probe.c
  ../shared/n-acd/src/n-acd-probe.c: In function 'n_acd_probe_unlink':
  ../shared/n-acd/src/n-acd-probe.c:209:13: error: variable 'r' set but not used [-Werror=unused-but-set-variable]
           int r;
               ^

  $ cache cc -Ishared/a4d2686@@c-rbtree@sta -Ishared -I../shared -fdiagnostics-color=always -DNDEBUG -pipe -D_FILE_OFFSET_BITS=64 -Werror -std=gnu11 -fdata-sections -ffunction-sections -O2 -g -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fPIC -std=c11 -MD -MQ 'shared/a4d2686@@c-rbtree@sta/c-rbtree_src_c-rbtree.c.o' -MF 'shared/a4d2686@@c-rbtree@sta/c-rbtree_src_c-rbtree.c.o.d' -o 'shared/a4d2686@@c-rbtree@sta/c-rbtree_src_c-rbtree.c.o' -c ../shared/c-rbtree/src/c-rbtree.c
  ../shared/c-rbtree/src/c-rbtree.c: In function 'c_rbtree_move':
  ../shared/c-rbtree/src/c-rbtree.c:456:18: error: variable 't' set but not used [-Werror=unused-but-set-variable]
           CRBTree *t;
                    ^

https://github.com/nettools/n-acd/pull/6
https://github.com/c-util/c-rbtree/pull/3

Imported c-rbtree code with command:

  git subtree add --prefix shared/c-rbtree git@github.com:c-util/c-rbtree.git bf627e0c32241915108f66ad9738444e4d045b45 --squash

To update the library use:

  git subtree pull --prefix shared/c-rbtree git@github.com:c-util/c-rbtree.git master --squash