Quando installi la porta Caffe da Macports, tenta anche di installare libgcc-devel , che richiede ore per essere compilato. Curiosamente, non sono riuscito a capire quale dipendenza abbia bisogno di questo. Ho corso
port rdeps Caffe
e fuori è arrivato questo (riassunto: non c'è libgcc-devel in là):
The following ports are dependencies of caffe @20150717_0+cpu+openblas+python27:
google-glog
gflags
protobuf-cpp
autoconf
xz
libiconv
gperf
gettext
expat
ncurses
automake
libtool
zlib
leveldb
snappy
lzo2
lmdb
boost
bzip2
icu
python27
openssl
sqlite3
libedit
db48
python_select
python2_select
hdf5
opencv
unzip
cmake
curl
pkgconfig
curl-ca-bundle
perl5
perl5.16
gdbm
libarchive
libxml2
libpng
jpeg
jasper
tiff
ilmbase
gsed
openexr
ffmpeg
gmake
texinfo
help2man
perl5.22
p5.22-locale-gettext
libvpx
yasm
lame
libvorbis
libogg
libopus
libtheora
libmodplug
schroedinger
orc
coreutils
gmp
libass
fribidi
glib2
libffi
fontconfig
freetype
enca
libbluray
gnutls
libidn
libtasn1
p11-kit
desktop-file-utils
popt
libxslt
nettle
openjpeg15
lcms2
jbigkit
speex
libsdl
xorg-libXext
xorg-util-macros
xorg-libX11
xorg-xtrans
xorg-bigreqsproto
xorg-xcmiscproto
xorg-xextproto
xorg-xf86bigfontproto
xorg-inputproto
xorg-libXdmcp
xorg-xproto
xorg-libXau
xorg-libxcb
xorg-xcb-proto
xorg-libpthread-stubs
xorg-kbproto
xorg-libXrandr
xrender
xorg-renderproto
xorg-randrproto
xorg-libXfixes
xorg-fixesproto
XviD
x264
szip
OpenBLAS
dragonegg-3.4-gcc-4.8
llvm-3.4
llvm_select
gcc48
cctools
libunwind-headers
llvm-3.5
libcxx
cloog
isl
ld64
ld64-latest
dyld-headers
libmacho-headers
libgcc
libmpc
mpfr
gcc_select
py27-cython
cython_select
py27-numpy
gcc49
fftw-3
py27-nose
py27-setuptools
nosetests_select
py27-scipy
swig-python
bison
m4
bison-runtime
swig
pcre
py27-scikit-image
py27-six
py27-matplotlib
qhull
py27-dateutil
py27-tz
py27-parsing
py27-pyobjc-cocoa
py27-pyobjc
py27-py2app
py27-macholib
py27-modulegraph
py27-altgraph
py27-tornado
py27-backports-ssl_match_hostname
py27-backports
py27-certifi
py27-tkinter
tk
tcl
py27-cairo
cairo
libpixman
xorg-xcb-util
py27-networkx
py27-decorator
py27-Pillow
lcms
webp
openjpeg
py27-scikit-learn
py27-ipython
gzip
py27-readline
py27-scientific
netcdf
py27-zmq
zmq
py27-jinja2
py27-markupsafe
py27-requests
py27-sphinx
py27-docutils
py27-roman
py27-alabaster
py27-babel
py27-pygments
py27-snowballstemmer
py27-sphinx_rtd_theme
sphinx_select
py27-jsonschema
py27-vcversioner
py27-functools32
py27-mistune
ipython_select
py27-h5py
py27-pkgconfig
py27-pandas
py27-tables
py27-numexpr
blosc
py27-bottleneck
py27-protobuf
py27-gflags
py27-leveldb
wget
Esecuzione
port rdeps --full caffe
elenca libgcc più volte, ma non libgcc-devel .
Quindi come mai questa porta installa libgcc-devel sebbene non dipenda da questo?