Found the following significant warnings:
  ./rlang/cnd.h:9:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  ./rlang/cnd.h:39:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  ./rlang/session.h:6:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  ./rlang/session.h:7:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  ./rlang/stack.h:7:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  ./rlang/stack.h:13:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/utils.h:5:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/nse-inject.h:47:37: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/cnd.c:144:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/dots.c:105:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/dots.c:138:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/dots.c:212:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/eval-tidy.c:256:13: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/eval-tidy.c:552:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/exported.c:12:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/exported.c:40:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/exported.c:493:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/exported.c:696:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/exported.c:806:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/exported.c:808:10: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/nse-inject.c:94:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/nse-inject.c:101:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/nse-inject.c:109:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/nse-inject.c:124:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/nse-inject.c:434:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/fn.c:36:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/hash.c:93:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/hash.c:164:5: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/hash.c:348:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/decl/names-decl.h:19:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/names.c:226:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/tests.c:8:3: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/tests.c:11:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/tests.c:14:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/tests.c:37:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/tests.c:68:3: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/tests.c:186:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/utils.c:4:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/utils.c:259:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/utils.c:267:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/utils.c:276:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/utils.c:281:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/init.c:7:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/init.c:10:1: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  internal/init.c:325:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/arg.c:8:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/call.c:65:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/cnd.c:96:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/cnd.c:137:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/dyn-array.c:122:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/env.c:285:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/env.c:289:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/eval.c:171:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/fn.c:28:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/globals.c:58:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/obj.c:99:16: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/quo.c:8:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/session.c:19:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/session.c:28:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/session.c:73:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/stack.c:19:8: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/stack.c:77:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/sym.c:56:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  rlang/vendor.c:5:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
  version.c:25:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
See ‘/data/gannet/ripley/R/packages/tests-devel/rlang.Rcheck/00install.out’ for details.
* used C compiler: ‘gcc (GCC) 12.2.1 20221121 (Red Hat 12.2.1-4)’
* used C++ compiler: ‘g++ (GCC) 12.2.1 20221121 (Red Hat 12.2.1-4)’