configure: WARNING: no indent program found: make indent target will not function
ar: `u' modifier ignored since `D' is the default (see `U')
scanflags.c: In function ‘sf_init’:
scanflags.c:65:13: warning: passing argument 2 of ‘lerrsf_fatal’ makes pointer from integer without a cast [-Wint-conversion]
   65 |             (long)sizeof(scanflags_t));
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~
      |             |
      |             long int
In file included from scanflags.c:34:
flexdef.h:912:48: note: expected ‘const char *’ but argument is of type ‘long int’
  912 | extern void lerrsf_fatal PROTO ((const char *, const char *));
      |                                                ^~~~~~~~~~~~
flexdef.h:121:22: note: in definition of macro ‘PROTO’
  121 | #define PROTO(proto) proto
      |                      ^~~~~
misc.c: In function ‘line_directive_out’:
misc.c:433:44: warning: ‘%s’ directive output may be truncated writing up to 2047 bytes into a region of size 2039 [-Wformat-truncation=]
  433 |  static const char *line_fmt = "#line %d \"%s\"\n";
      |                                            ^~
......
  459 |   snprintf (directive, sizeof(directive), line_fmt, 0, filename);
      |                                                        ~~~~~~~~
In file included from /usr/include/stdio.h:867,
                 from flexdef.h:58,
                 from misc.c:34:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:67:10: note: ‘__builtin___snprintf_chk’ output between 12 and 2059 bytes into a destination of size 2048
   67 |   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   68 |        __bos (__s), __fmt, __va_arg_pack ());
      |        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
misc.c:433:44: warning: ‘%s’ directive output may be truncated writing up to 2047 bytes into a region of size between 2029 and 2039 [-Wformat-truncation=]
  433 |  static const char *line_fmt = "#line %d \"%s\"\n";
      |                                            ^~
......
  457 |   snprintf (directive, sizeof(directive), line_fmt, linenum, filename);
      |                                                              ~~~~~~~~
In file included from /usr/include/stdio.h:867,
                 from flexdef.h:58,
                 from misc.c:34:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:67:10: note: ‘__builtin___snprintf_chk’ output between 12 and 2069 bytes into a destination of size 2048
   67 |   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   68 |        __bos (__s), __fmt, __va_arg_pack ());
      |        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
buf.c: In function ‘buf_linedir’:
buf.c:101:60: warning: assignment discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
  101 |     for (dst = t + sprintf (t, "#line %d \"", lineno), src = filename; *src; *dst++ = *src++)
      |                                                            ^
filter.c: In function ‘filter_fix_linedirs’:
filter.c:402:40: warning: ‘%s’ directive output may be truncated writing up to 2047 bytes into a region of size between 494 and 503 [-Wformat-truncation=]
  402 |     snprintf (buf, readsz, "#line %d \"%s\"\n",
      |                                        ^~
  403 |        lineno + 1, filename);
      |                    ~~~~~~~~             
In file included from /usr/include/stdio.h:867,
                 from flexdef.h:58,
                 from filter.c:24:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:67:10: note: ‘__builtin___snprintf_chk’ output between 12 and 2068 bytes into a destination of size 512
   67 |   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   68 |        __bos (__s), __fmt, __va_arg_pack ());
      |        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY