Detecting endianness when making a FreeBSD port makefile

The title really says it all, my porting foo and Google foo was insufficent when I was working on a port for the IMS Corpus Workbench this weekend. I had to turn to the good people at #bsdports@EFnet and to aid me was @stass. He supplied me with what I at time suspected to be the only way, to use a regexp to extract the information from endian.h (yuck!). Here are the two options he provided.

LITTLE_ENDIAN!= ${EGREP} \
'^#define[[:space:]]+_BYTE_ORDER[[:space:]]+[^[:space:]]+$' \
/usr/include/machine/endian.h | ${AWK} '{if ($3 == \
"_LITTLE_ENDIAN") print 1;}'

LITTLE_ENDIAN!= ${AWK} \
'/^#define[[:space:]]+_BYTE_ORDER[[:space:]]+[^[:space:]]+$/
{if ($3 == "_LITTLE_ENDIAN") print 1;}' \
/usr/include/machine/endian.h

These work just fine for an ordinary shell but the same thing in a makefile needs some small adjustments. I prefered the purely AWK one, so here it is.

LITTLE_ENDIAN= ${AWK} \
'/^\#define[[:space:]]+_BYTE_ORDER[[:space:]]+[^[:space:]]+$$/ ' + \
'{if ($$3 == "_LITTLE_ENDIAN") print 1;}' /usr/include/machine/endian.h

Now hopefully the Google Bot will crawl over this and allow the next porter to find what I could not. Once again, thank you @stass. =)