It is used by the image viewer:

/usr/bin/ld: img2txt-common-image.o: in function `load_image':
../../src/common-image.c:164: undefined reference to `_caca_alloc2d'

Fixes #59.

common-image.c:164:18: warning: nested extern declaration of ‘_caca_alloc2d’ [-Wnested-externs]

common-image.c: In function ‘load_image’:
common-image.c:164:18: warning: implicit declaration of function ‘_caca_alloc2d’ [-Wimplicit-function-declaration]
  164 |     im->pixels = _caca_alloc2d(im->w, im->h, depth);
      |                  ^~~~~~~~~~~~~

Patch courtesy of Jakub Bogusz.

Patch courtesy of Jakub Bogusz.

Fix py img2txt

Add support for IPv6 to cacaserver

Disable cppunit  tests by default, honor --enable-cppunit

Bold/italic attribute support for export to svg

slang driver: enable utf8 auto-detection (bug fix)

These were all caused by sprintf() appending a null char that was not actually used.
Fixes CVE-2021-30498 and CVE-2021-30499.

Fixes: #52 (CVE-2021-3410)

Fixes: #42

Fixes: #38 (CVE-2018-20546)
Fixes: #39 (CVE-2018-20547)

Fixes: #37 (CVE-2018-20545)
Fixes: #40 (CVE-2018-20548)
Fixes: #41 (CVE-2018-20549)

Fixes: #36 (CVE-2018-20544)

Hide private symbols (issue #33).

The slang internal auto-detection of utf8 is only executed by a call to
SLutf8_enable(-1).

This will hopefully fix the OS X ruby package.