#5 configure for universal build fails on OS X

[Shawn]

When trying to perform a universal build on OS X 10.7.3, configure fails:

LDFLAGS="-arch i386 -arch x86_64" CFLAGS="-arch i386 -arch x86_64" ./configure --prefix=/usr/local --disable-dependency-tracking
...
checking size of long... configure: error: cannot determine a size for long

See attached log file for details.

[Shawn]

Configure log file

[Shawn]

macports (and soon homebrew likely) are using this workaround:

ac_cv_sizeof_long="(LONG_BIT/8)" LDFLAGS="-arch i386 -arch x86_64" CFLAGS="-arch i386 -arch x86_64" ./configure --prefix=/usr/local --disable-dependency-tracking
...

Note the ac_cv_sizeof_long override.