configure: WARNING: texi2dvi: program not found: building pdf version of manual will not work
configure: WARNING: ${top_srcdir}/build-aux/missing indent does not appear to be GNU indent; 'make indent' may not function properly
main.c: In function 'check_options':
main.c:347:14: warning: assignment discards 'const' qualifier from pointer target type
   if ((slash = strrchr(M4, '/')) != NULL) {
              ^
main.c: In function 'check_options':
main.c:347:14: warning: assignment discards 'const' qualifier from pointer target type
   if ((slash = strrchr(M4, '/')) != NULL) {
              ^
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY