One gets this:
|   GEN    lf3-xaaBitmap.c
|   GEN    lf3-xaaBitmap.c
|   GEN    lf3-xaaBitmap.c
|   GEN    lf3-xaaBitmap.c
|   CC     lf3-xaaBitmap.lo

instead of this:
| echo "#define LSBFIRST" > l3-xaaBitmap.c
| echo "#define TRIPLE_BITS" >> l3-xaaBitmap.c
| echo '#include "../../../../hw/xfree86/xaa/xaaBitmap.c"' >> l3-xaaBitmap.c
|   CC     l3-xaaBitmap.lo

Occurrences found using:
| git grep -E '(cat|echo)' -- '*Makefile.am'

Reviewed-by: Gaetan Nadon <memsize@videotron.ca>
Signed-off-by: Cyril Brulebois <kibi@debian.org>