File: autoconf.info,  Node: Backslash-Newline-Empty,  Next: Backslash-Newline Comments,  Prev: Special Chars in Names,  Up: Portable Make

12.4 Backslash-Newline Before Empty Lines
=========================================

On some versions of HP-UX, ‘make’ reads multiple newlines following a
backslash, continuing to the next non-empty line.  For example,

     FOO = one \

     BAR = two

     test:
             : FOO is "$(FOO)"
             : BAR is "$(BAR)"

shows ‘FOO’ equal to ‘one BAR = two’.  Other implementations sensibly
let a backslash continue only to the immediately following line.