"If it takes forever, I will wait for you" are poignant lyrics from which popular song of the 1940s/1950s?

I will wait for you

They were lyrics which were in the theme for the French film 'The Umbrellas of Cherbourg' as well.

English Words by Norman Gimbel and Music by Michel Legrand from the 1964 film "The Umbrellas Of Cherbourg" starring Catherine Deneuve. Charted at #113 in 1965 by Steve Lawrence.

andy-williams-lyrics.wonderlyrics.com/ I-Will-Wait-For-You.html

I Will Wait for You

If it takes forever I will wait for you
For a thousand summers I will wait for you
'Till you're back beside me, 'till I'm holding you
'Till I hear you sigh here in my arms

Anywhere you wander, anywhere you go
Every day remember how I love you so
In your heart believe what in my heart I know
That forever more I'll wait for you

The clock will tick away the hours one by one
And then the time will come when all the waiting's done
The time when you return and find me here and run
Straight to my waiting arms

If it takes forever I will wait for you
For a thousand summers I will wait for you
'Till you're here beside me, 'till I'm holding you
And forever more sharing your love

And forever more I'll wait for you

If this is it, this page has the lyrics.
http://www.metrolyrics.com/i-will-wait-for-you-lyrics-andy-williams.html

"If it takes forever", by Rigmor Gulaffson:

If it takes forever, I will wait for you
For a thousand summers, I will wait for you
'Til you're back beside me, 'til I'm holding you
'Til I hear you sigh here in my arms

Anywhere you run to, anywhere you go
Every day remember, how I love you so
In your heart believe what in my heart I know
That forever more I'll wait for you

If it takes forever, I will wait for you
For a thousand summers, I will wait for you
'Til you're back beside me, 'til I'm touching you
And forever more cherish your love

If it takes forever, I will wait for you
For a thousand summers, I will wait for you
'Til you're back beside me, 'til I'm touching you
And forever more cherish your love

Anywhere you run to, anywhere you go
Every day remember, how I love you so
In your heart believe what in my heart I know
That forever more I'll wait for you

If it takes forever, if it takes forever
For a thousand summers

I will wait for you, I will wait for you
For a thousand summers
I will wait for you
For you...