[Ffmpeg-devel] bash substitutions

[Måns Rullgård]

Rich Felker <dalias at aerifal.cx> writes:

> On Sun, Dec 18, 2005 at 10:43:22AM +0100, matthieu castet wrote:
>> Jacob Meuser wrote:
>> >revision 1.217 of configure added some shell substitutions.
>> >these apparently only work with bash, which is _not_ the /bin/sh
>> >on all systems.
>> >
>> >specifically:
>> >
>> >  echo "SPPMAJOR=${lavc_version/.*/}" >> config.mak
>> >  echo "LAVCMAJOR=${lavc_version/.*/}" >> config.mak
>> >  echo "LAVFMAJOR=${lavf_version/.*/}" >> config.mak
>> >  echo "LAVUMAJOR=${lavu_version/.*/}" >> config.mak
>> >
>> >this not work with pdksh, which is the /bin/sh on OpenBSD.
>> >I doubt it works with ash, which is the /bin/sh on NetBSD.
>> >
>> And dash on debian.
>> 
>> >I suggest the following patch.
>> >
>> 
>> you could use on sh :
>> ${parameter%word}
>> ${parameter%%word}
>> ${parameter#word}
>> ${parameter##word}
>> 
>> Something like ${lavu_version%%.[^.]*} should work
>
> Or ${lavc_version%.*}
> However, is this portable, or is it yet another bashism??

Solaris /bin/sh dislikes both.

-- 
M?ns Rullg?rd
mru at inprovide.com