Found the following significant warnings:
  Ediggatsti.c:23:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  Ediggra.c:21:12: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  Ediggra.c:21:8: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
  Ediggra.c:23:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  Ediggra.c:100:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  Efiksel.c:21:12: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  Efiksel.c:21:8: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
  Efiksel.c:21:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  Efiksel.c:21:16: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
  Efiksel.c:23:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  Egeyer.c:28:12: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  Egeyer.c:28:8: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
  Egeyer.c:30:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  Estrauss.c:25:12: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  Estrauss.c:25:8: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
  Estrauss.c:27:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  Estrauss.c:83:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  ./Kborder.h:27:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  ./Knone.h:23:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  ./KrectFunDec.h:18:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  areapair.c:22:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:63:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:75:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:78:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:89:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:92:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:105:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:108:9: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  call3d.c:115:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:119:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:127:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:135:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:157:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:178:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:212:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:231:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:259:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:283:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:305:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:342:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:379:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:417:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:446:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:491:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  call3d.c:523:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  ./ripleybox.h:23:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  ./ripleypoly.h:45:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:27:12: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  denspt.c:27:8: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
  denspt.c:27:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  denspt.c:27:16: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
  denspt.c:41:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:69:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:99:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:127:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:162:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:212:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:264:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:318:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:384:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:404:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:425:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  denspt.c:471:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  densptcross.c:25:12: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  densptcross.c:25:8: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
  densptcross.c:25:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  densptcross.c:25:16: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
  densptcross.c:43:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  densptcross.c:73:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  densptcross.c:105:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  densptcross.c:138:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  densptcross.c:175:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  densptcross.c:210:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  densptcross.c:247:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  densptcross.c:285:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  digber.c:22:12: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  digber.c:22:8: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
  digber.c:22:20: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  digber.c:22:16: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Wdeprecated-non-prototype]
  digber.c:37:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:64:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:80:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:94:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:95:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:98:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:136:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:244:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:279:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:338:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:421:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:448:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  f3.c:474:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  g3.c:64:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  g3.c:102:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  g3.c:128:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  g3.c:169:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  g3.c:212:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  idw.c:27:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  idw.c:91:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  idw.c:172:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  idw.c:255:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  k3.c:49:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  k3.c:49:30: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  k3.c:38:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  k3.c:107:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  k3.c:107:30: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  k3.c:148:30: warning: passing arguments to 'sphesfrac' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  k3.c:149:20: warning: passing arguments to 'sphesfrac' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  k3.c:151:21: warning: passing arguments to 'sphevol' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  k3.c:97:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  ./localpcf.h:24:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  ./loccums.h:21:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  ./loccumx.h:22:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  pcf3.c:43:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  pcf3.c:43:30: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  pcf3.c:29:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  pcf3.c:128:19: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  pcf3.c:128:30: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  pcf3.c:178:27: warning: passing arguments to 'sphesfrac' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  pcf3.c:179:24: warning: passing arguments to 'sphesfrac' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  pcf3.c:181:25: warning: passing arguments to 'sphevol' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  pcf3.c:115:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  raster.c:15:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  scan.c:16:18: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  scan.c:19:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  scan.c:91:15: warning: passing arguments to 'shape_raster' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  scan.c:69:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  segdens.c:27:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  segdens.c:62:6: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:46:11: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphefrac.c:46:17: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphefrac.c:46:23: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphefrac.c:61:12: warning: passing arguments to 'a1' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:61:25: warning: passing arguments to 'a1' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:71:13: warning: passing arguments to 'a2' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:71:33: warning: passing arguments to 'a2' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:72:9: warning: passing arguments to 'a2' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:72:29: warning: passing arguments to 'a2' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:79:11: warning: passing arguments to 'a3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:79:37: warning: passing arguments to 'a3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:83:11: warning: passing arguments to 'a3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:83:37: warning: passing arguments to 'a3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:87:11: warning: passing arguments to 'a3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:87:37: warning: passing arguments to 'a3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:91:11: warning: passing arguments to 'a3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:91:37: warning: passing arguments to 'a3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:40:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:99:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:114:11: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphefrac.c:117:11: warning: passing arguments to 'c2' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:111:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:124:11: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphefrac.c:127:11: warning: passing arguments to 'c3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:121:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:135:11: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphefrac.c:131:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphefrac.c:147:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:50:11: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphevol.c:50:17: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphevol.c:50:23: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphevol.c:69:12: warning: passing arguments to 'v1' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:69:30: warning: passing arguments to 'v1' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:79:13: warning: passing arguments to 'v2' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:79:41: warning: passing arguments to 'v2' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:80:9: warning: passing arguments to 'v2' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:80:36: warning: passing arguments to 'v2' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:87:11: warning: passing arguments to 'v3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:88:7: warning: passing arguments to 'v3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:92:11: warning: passing arguments to 'v3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:93:7: warning: passing arguments to 'v3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:97:11: warning: passing arguments to 'v3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:98:7: warning: passing arguments to 'v3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:102:11: warning: passing arguments to 'v3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:103:7: warning: passing arguments to 'v3' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:44:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:117:10: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphevol.c:120:26: warning: passing arguments to 'u' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:112:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:136:10: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphevol.c:153:25: warning: passing arguments to 'u' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:131:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:162:10: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphevol.c:187:19: warning: passing arguments to 'u' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:157:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:194:10: warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]
  sphevol.c:203:6: warning: passing arguments to 'w' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:203:15: warning: passing arguments to 'w' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:203:24: warning: passing arguments to 'w' without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:191:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
  sphevol.c:210:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype]
See '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/spatstat.core.Rcheck/00install.out' for details.