version: 3.6.3
source: http://www.unidata.ucar.edu/downloads/netcdf/

Make sure to get at least version 3.6.2, as it has a much simpler configuration. Untested with v4.

Netcdf builds as a static library only.

In the netcdf source:

export MACOSX_DEPLOYMENT_TARGET=10.5
./configure --disable-dependency-tracking --enable-c-only \\
CFLAGS="-Os -arch ppc -arch i386 -arch ppc64 -arch x86_64 -D_FILE_OFFSET_BITS=64"

Unless you need the C++ library, use the c-only option above (GDAL is C++, but uses the C library). The FILE_OFFSET_BITS option is from habit, and may not be needed now.

After configuration, edit config.h and replace lines:

– the SIZEOF_LONG line with:

#ifdef __LP64__
#define SIZEOF_LONG 8
#else
#define SIZEOF_LONG 4
#endif

– the SIZEOF_SIZE_T line with:

#ifdef __LP64__
#define SIZEOF_SIZE_T 8
#else
#define SIZEOF_SIZE_T 4
#endif

– the WORDS_BIGENDIAN line with:

#ifdef __BIG_ENDIAN__
  #define WORDS_BIGENDIAN 1
#else
  #undef WORDS_BIGENDIAN
#endif

make
sudo make install

In the netcdf source:

export MACOSX_DEPLOYMENT_TARGET=10.4
./configure --disable-dependency-tracking --enable-c-only \\
CFLAGS="-Os -arch ppc -arch i386 -D_FILE_OFFSET_BITS=64"

Edit config.h and replace lines:

– the WORDS_BIGENDIAN line with:

#ifdef __BIG_ENDIAN__
  #define WORDS_BIGENDIAN 1
#else
  #undef WORDS_BIGENDIAN
#endif

make
sudo make install

In the netcdf source:

./configure --disable-dependency-tracking --enable-c-only \\
CFLAGS="-Os -D_FILE_OFFSET_BITS=64"
make
sudo make install