PREFIX="/usr/local"

OPT_FLAGS="-O3 -march=core2 -mtune=intel -fomit-frame-pointer"
OS_ARCH="`uname -m`" OS_REV="`uname -r | cut -d. -f1`"
TRIPLE="${OS_ARCH}-apple-darwin${OS_REV}"

export CXXFLAGS="${OPT_FLAGS} -pipe -Wall -fno-common -DPIC"
export CFLAGS="${OPT_FLAGS} -pipe -Wall -fno-common -DPIC"
export LDFLAGS="-Wl,-no_pie"
export CXX=g++
export CC=gcc

# MPN_64="x86_64/coreibwl x86_64/coreihwl x86_64/coreisbr x86_64/coreinhm x86_64/fastsse x86_64/core2 x86_64 generic"

MPN_64="x86_64/coreihwl x86_64/coreisbr x86_64/coreinhm x86_64/fastsse x86_64/core2 x86_64 generic"

# Replace two options with --disable-static --enable-shared for shared libraries

MPN_PATH="${MPN_64}" \
./configure \
   --build="${TRIPLE}" --prefix="${PREFIX}" --disable-shared --enable-static \
   --enable-cxx --enable-assembly --enable-fft


##</code><code>##

cd gmp-6.1.2
sh /path/to/configure-gmp.sh

make -j 4
make check    # <-- important, do not skip

sudo make install-strip


##</code><code>##

PREFIX="/usr/local"

OPT_FLAGS="-O3 -march=core2 -mtune=intel -fomit-frame-pointer"
OS_ARCH="`uname -m`" OS_REV="`uname -r | cut -d. -f1`"
TRIPLE="${OS_ARCH}-apple-darwin${OS_REV}"

export CXXFLAGS="${OPT_FLAGS} -pipe -Wall -fno-common -DPIC"
export CFLAGS="${OPT_FLAGS} -pipe -Wall -fno-common -DPIC"
export LDFLAGS="-Wl,-no_pie"
export CXX=g++
export CC=gcc

# Replace two options with --disable-static --enable-shared for shared libraries

./configure \
   --build="${TRIPLE}" --prefix="${PREFIX}" --disable-shared --enable-static \
   --disable-dependency-tracking --disable-assert --enable-thread-safe \
   --with-gmp="${PREFIX}"


##</code><code>##

cd mpfr-3.1.2
patch -N -Z -p1 < /path/to/allpatches.txt
sh /path/to/configure-mpfr.sh

make -j 4
make check    # <-- important, do not skip

sudo make install-strip


##</code><code>##

$ time /opt/perl-5.26.1/bin/perl -Mntheory=:all -E 'say Pi(1e6)' | wc -c
 1000002

real  0m1.428s
user  0m1.408s
sys   0m0.017s