Hello,
The `INSTALL' file provided by autotools has the following blurp
On MacOS X 10.5 and later systems, you can create libraries and
executables that work on multiple system types--known as "fat" or
"universal" binaries--by specifying multiple `-arch' options to the
compiler but only a single `-arch' option to the preprocessor. Like
this:
./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
CPP="gcc -E" CXXCPP="g++ -E"
I noticed that when configuring like that automake automagically turns
off dependency-tracking, for good reasons.
However, it is not uncommon that people instead issue
./configure CFLAGS="-arch i386 -arch x86_64 -arch ppc -arch ppc64" \
CXXFLAGS="-arch i386 -arch x86_64 -arch ppc -arch ppc64" \
LDFLAGS="-arch i386 -arch x86_64 -arch ppc -arch ppc64"
which will not works. See for example
http://www.mail-archive.com/help-gsl@gnu.org/msg03121.html
You need to explicitly turn off dependency tracking. My question is
simply is there a good reason why automake does not turn off the
dependency tracking automagically in this case, or should I consider it
a missing feature.
Cheers,
Peter
