The hack that has been around for years (and I have used myself many places, possibly even introducing you to it :fearful:) to create a variable with a single space relied on GNU-Make's handling of appending variables always adding a space first. In version 4.3 they introduced a breaking change which effectively trims after append operations.
WARNING: Backward-incompatibility!
Previously appending using '+=' to an empty variable would result in a value
starting with a space. Now the initial space is only added if the variable
already contains some value. Similarly, appending an empty string does not
add a trailing space. (source)
This PR uses a current and backwards compatible way of avoiding the trim operation.
khaledhosny
commented
4 years ago
The hack that has been around for years (and I have used myself many places, possibly even introducing you to it :fearful:) to create a variable with a single space relied on GNU-Make's handling of appending variables always adding a space first. In version 4.3 they introduced a breaking change which effectively trims after append operations.
This PR uses a current and backwards compatible way of avoiding the trim operation.