Found the following significant warnings:
  ./error.h:628:13: warning: format string is not a string literal (potentially insecure) [-Wformat-security]
  ./rng.h:1168:13: warning: format string is not a string literal (potentially insecure) [-Wformat-security]
  cHDPHSMMnegbin.cc:570:42: warning: data argument not used by format string [-Wformat-extra-args]
  cHMMpanelRE.cc:406:46: warning: data argument not used by format string [-Wformat-extra-args]
  cHMMpanelRE.cc:407:49: warning: data argument not used by format string [-Wformat-extra-args]
  cHMMpanelRE.cc:408:51: warning: data argument not used by format string [-Wformat-extra-args]
  cHMMpanelRE.cc:409:45: warning: data argument not used by format string [-Wformat-extra-args]
  cHMMpanelRE.cc:410:55: warning: data argument not used by format string [-Wformat-extra-args]
  ./rng.h:1238:13: warning: format string is not a string literal (potentially insecure) [-Wformat-security]
  cMCMCoprobitChange.cc:49:98: warning: data argument not used by format string [-Wformat-extra-args]
  cMCMCpaircompare2d.cc:448:73: warning: data argument not used by format string [-Wformat-extra-args]
  cMCMCpaircompare2d.cc:449:94: warning: data argument not used by format string [-Wformat-extra-args]
  cMCMCpaircompare2d.cc:450:75: warning: data argument not used by format string [-Wformat-extra-args]
  cMCMCpaircompare2dDP.cc:765:69: warning: data argument not used by format string [-Wformat-extra-args]
  cMCMCpaircompare2dDP.cc:766:90: warning: data argument not used by format string [-Wformat-extra-args]
  cMCMCpaircompare2dDP.cc:767:71: warning: data argument not used by format string [-Wformat-extra-args]
  cMCMCprobitres.cc:147:51: warning: data argument not used by format string [-Wformat-extra-args]
  cMCMCprobitres.cc:148:43: warning: data argument not used by format string [-Wformat-extra-args]
  cSSVSquantreg.cc:262:30: warning: format specifies type 'double' but the argument has type 'bool' [-Wformat]
See ‘/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/MCMCpack.Rcheck/00install.out’ for details.
* used C compiler: ‘Debian clang version 17.0.5 (1)’
* used C++ compiler: ‘Debian clang version 17.0.5 (1)’