Flawfinder version 2.0.10, (C) 2001-2019 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 223
Examining data/fonts-noto-color-emoji-0~20200916/waveflag.c

FINAL RESULTS:

data/fonts-noto-color-emoji-0~20200916/waveflag.c:410:2:  [4] (buffer) strcat:
  Does not check for buffer overflows when concatenating to destination
  [MS-banned] (CWE-120). Consider using strcat_s, strncat, strlcat, or
  snprintf (warning: strncat is easily misused).
	strcat (out, out_prefix);
data/fonts-noto-color-emoji-0~20200916/waveflag.c:417:2:  [4] (buffer) strcat:
  Does not check for buffer overflows when concatenating to destination
  [MS-banned] (CWE-120). Consider using strcat_s, strncat, strlcat, or
  snprintf (warning: strncat is easily misused).
	strcat (out, basename((char *) filename));
data/fonts-noto-color-emoji-0~20200916/waveflag.c:268:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char out[1000];

ANALYSIS SUMMARY:

Hits = 3
Lines analyzed = 451 in approximately 9.50 seconds (47 lines/second)
Physical Source Lines of Code (SLOC) = 356
Hits@level = [0]   5 [1]   0 [2]   1 [3]   0 [4]   2 [5]   0
Hits@level+ = [0+]   8 [1+]   3 [2+]   3 [3+]   2 [4+]   2 [5+]   0
Hits/KSLOC@level+ = [0+] 22.4719 [1+] 8.42697 [2+] 8.42697 [3+] 5.61798 [4+] 5.61798 [5+]   0
Dot directories skipped = 1 (--followdotdir overrides)
Minimum risk level = 1
Not every hit is necessarily a security vulnerability.
There may be other security vulnerabilities; review your code!
See 'Secure Programming HOWTO'
(https://dwheeler.com/secure-programs) for more information.