dependency on xsltproc missing

I was trying to build swfmill on Ubuntu Jaunty.

It made it through ./configure successfully.

However, when I tried to make, i got this error:

In function ‘int snprintf(char*, size_t, const char*, ...)’,
    inlined from ‘void swfmill_create_library_dir(xmlNode*, const char*)’ at swfmill.cpp:347:
/usr/include/bits/stdio2.h:66: warning: call to int __builtin___snprintf_chk(char*, unsigned int, int, unsigned int, const char*, ...) will always overflow destination buffer
mv -f .deps/swfmill-swfmill.Tpo .deps/swfmill-swfmill.Po
xsltproc ./codegen/mk.xsl ./codegen/source.xml
/bin/bash: xsltproc: command not found
make[3]: *** [gSWFParseXML.cpp] Error 127
make[3]: Leaving directory `/home/deploy/swfmill-0.3.0/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/deploy/swfmill-0.3.0/src'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/home/deploy/swfmill-0.3.0/src'
make: *** [all-recursive] Error 1

I then did
'sudo apt-get install xsltproc'

and built again, and it built successfully.

That makes me think that the dependency on xsltproc should be listed somewhere.