Pink Floyd co-founder Roger Waters attended the Toronto International Film Festival (TIFF) on Saturday for the world premiere of his documentary "Roger Waters: The Wall," Rolling Stone reports.

The documentary is an "anti-war, protest film," according to the legendary rocker, who has been known for his advocacy against war and capitalism throughout his career as a bassist and songwriter for the renowned British band and as a solo artist.

"The Wall" features footages from his The Wall world tour, which showcased all 26 songs from his erstwhile group's massively successful 1979 concept double album "The Wall".

The world tour, which incidentally began in Toronto, started in 2010 and lasted through 2013. It became the highest-grossing tour for a solo musician, Uncut reported.

After the screening of the documentary, the crowd sang "Happy Birthday" to Waters, who was celebrating his 71st birthday on that day.

A discussion then followed, with a member of the crowd asking why the album was so enduring, according to the Toronto Sun.

"I think people are sick and tired of being told that the most important thing in their life is commerce and the new this and the new that," the musician answered.

"I think people are probably ready to go now, 'Well all of that rhetoric leads us to lob bombs over the top of the wall, that divides society ecologically, economically, philosophically and politically, from all our fellow human beings, and we no longer want to be told by our political leaders that they are scum and that we are great,'" he continued.

Waters said he believes that "it may be we're no longer interested in the 'us and them' form of political philosophy that we've been fed on for the last couple of 1000 years and that we may be ready to move into a new place," he surmised.

"All of that, plus 'Comfortably Numb' is awesome," he said, referring one of the more popular and well-loved songs on the album.  

The 133-minute documentary is still looking for a distributor and no release date has been announced. Two more screenings of the film will happen in Toronto after the TIFF.