File: autoconf.info,  Node: Command-line Macros and whitespace,  Next: obj/ and Make,  Prev: Trailing whitespace in Make Macros,  Up: Portable Make

12.15 Command-line Macros and whitespace
========================================

Some ‘make’ implementations may strip trailing whitespace off of macros
set on the command line in addition to leading whitespace.  Further,
some may strip leading whitespace off of macros set from environment
variables:

     $ echo 'print: ; @echo "x$(foo)x$(bar)x"' |
       foo=' f f ' make -f - bar=' b b '
     x f f xb b x  # AIX, BSD, GNU make
     xf f xb b x   # HP-UX, IRIX, Tru64/OSF make
     x f f xb bx   # Solaris make