On Wiki's French entry about the song, "Douce France" (Lyrics: Charles Trenet, Music: Charles Trenet et Léo Chauliac, © - 1943 - Salabert) is said to have been inspired by The Song of Roland...
"...The count Rollanz, beneath a pine he sits;
Turning his eyes towards Spain, he begins
Remembering so many divers things:
So many lands where he went conquering,
And France the Douce, the heroes of his kin,
And Charlemagne, his lord who nourished him...."
... though "France the Douce" (La douce France) is often mentioned in the epic poem.

You can find the lyrics of all Charles Trenet's songs on Le portail des amis de Charles Trenet (in French only).