#!/opt/tigersh-deps-0.1/bin/bash
# based on templates/build-from-source.sh v6

# Install gmp on OS X Tiger / PowerPC.

package=gmp
version=4.3.2
upstream=https://ftp.gnu.org/gnu/$package/$package-$version.tar.gz

set -e -o pipefail
PATH="/opt/tigersh-deps-0.1/bin:$PATH"
TIGERSH_MIRROR=${TIGERSH_MIRROR:-https://leopard.sh}

if test -n "$(echo -n $0 | grep '\.ppc64\.sh$')" ; then
    ppc64=".ppc64"
fi

pkgspec=$package-$version$ppc64

echo -n -e "\033]0;tiger.sh $pkgspec ($(tiger.sh --cpu))\007"

if tiger.sh --install-binpkg $pkgspec ; then
    exit 0
fi

echo -e "${COLOR_CYAN}Building${COLOR_NONE} $pkgspec from source." >&2
set -x

if ! test -e /usr/bin/gcc ; then
    tiger.sh xcode-2.5
fi

if ! type -a gcc-4.2 >/dev/null 2>&1 ; then
    tiger.sh gcc-4.2
fi

tiger.sh --unpack-dist $pkgspec
cd /tmp/$package-$version

# Note: /usr/bin/gcc (4.0.1) fails with:
#   ld: duplicate symbol ___gmpz_abs in .libs/compat.o and .libs/assert.o
# So we use gcc-4.2 instead.
# Thanks to https://gmplib.org/list-archives/gmp-bugs/2010-January/001837.html
CC=gcc-4.2

# Note: we do _not_ use g++-4.2, as that appears to be missing certain headers
# like bits/c++config.h:
#     $ find /usr | grep c++config
#     /usr/include/c++/4.0.0/i686-apple-darwin8/bits/c++config.h
#     /usr/include/c++/4.0.0/powerpc-apple-darwin8/bits/c++config.h
#     /usr/include/c++/4.0.0/powerpc64-apple-darwin8/bits/c++config.h
#     /usr/include/c++/4.0.0/x86_64-apple-darwin8/bits/c++config.h
#     /usr/include/gcc/darwin/3.3/c++/i386-darwin/bits/c++config.h
#     /usr/include/gcc/darwin/3.3/c++/ppc-darwin/bits/c++config.h
# which causes configure to fail:
#     checking C++ compiler g++-4.2 -mcpu=970 -O2 -m64  -pedantic -no-cpp-precomp... no, std iostream
#     configure: error: C++ compiler not available, see config.log for details
#     Test compile: std iostream
#     configure:9383: g++-4.2 -mcpu=970 -O2 -m64  -pedantic -no-cpp-precomp conftest.cc >&5
#     In file included from conftest.cc:3:
#     /usr/include/c++/4.0.0/iostream:43:28: error: bits/c++config.h: No such file or directory
CXX=g++

# Note: gmp is extra finicky with regard to flags.  Hacks ahead.
# It was a pain to figure all of this out.

CC="$CC $(tiger.sh -mcpu -O)"
CXX="$CXX $(tiger.sh -mcpu -O)"
LDFLAGS="$LDFLAGS $(tiger.sh -mcpu -O)"

if test -n "$ppc64" ; then
    CC="$CC -m64"
    CXX="$CXX -m64"
    LDFLAGS="$LDFLAGS -m64"
fi

cpu=$(tiger.sh --cpu)
if test "$cpu" = "g4e" \
|| test "$cpu" = "g4" \
|| test "$cpu" = "g5" -a -z "$ppc64"
then
    # Note: it appears force_cpusubtype_ALL is required when using altivec in asm files:
    # tmp-mod_34lsub1.s:166:vxor vector instruction is optional for the PowerPC (not allowed without -force_cpusubtype_ALL option)
    CC="$CC -force_cpusubtype_ALL"
    CXX="$CXX -force_cpusubtype_ALL"
    # Note that this will cause the arch to be reported correctly on G5/64:
    #     Non-fat file: lib/libgmp.3.5.2.dylib is architecture: ppc64
    # and also on G3:
    #     Non-fat file: lib/libgmp.3.5.2.dylib is architecture: ppc750
    # but will appear as "ppc" for G5/32, G4, and G4e:
    #     Non-fat file: lib/libgmp.3.5.2.dylib is architecture: ppc
fi

CFLAGS="-pedantic -no-cpp-precomp"
CXXFLAGS="-pedantic -no-cpp-precomp"

# Note: these MPN_PATH values may appear confusing (e.g. why use 750 on a G4?),
# but this is just confusing naming choices on the part of mpn.
# From mpn/powerpc32/README:
#   powerpc           generic, 604, 604e, 744x, 745x
#   powerpc/750       740, 750, 7400, 7410
# So "powerpc/750" also applies to G4.
# Additionally, mpn doesn't have a specific MPN_PATH for the G5, so for
# G5/32, we treat it like a G4.

if test "$cpu" = "g5" ; then
    if test -n "$ppc64" ; then
        MPN_PATH="powerpc64/mode64 powerpc64/vmx powerpc64 generic"
    else
        # MPN_PATH="powerpc64/mode32 powerpc64/vmx powerpc32/750 powerpc32 generic"
        # Note: for G5/32, ideally we'd try powerpc64/mode32, but this causes
        # gmp.h to make 64-bit defines, which breaks mpfr:
        #   configure: error: GMP_NUMB_BITS and sizeof(mp_limb_t) are not consistent,
        # so we just make it the same as the G4 build.
        MPN_PATH="powerpc32/vmx powerpc32/750 powerpc32 generic"
    fi
elif test "$cpu" = "g4e" -o "$cpu" = "g4" ; then
    MPN_PATH="powerpc32/vmx powerpc32/750 powerpc32 generic"
elif test "$cpu" = "g3" ; then
    MPN_PATH="powerpc32/750 powerpc32 generic"
fi

if test -n "$ppc64" ; then
    abi="ABI=mode64"
else
    abi="ABI=32"
fi

/usr/bin/time ./configure -C --prefix=/opt/$pkgspec \
    --enable-cxx \
    $abi \
    CFLAGS="$CFLAGS" \
    CXXFLAGS="$CXXFLAGS" \
    CC="$CC" \
    CXX="$CXX" \
    LDFLAGS="$LDFLAGS" \
    MPN_PATH="$MPN_PATH"

/usr/bin/time make $(tiger.sh -j)

if test -n "$TIGERSH_RUN_TESTS" ; then
    make check
fi

make install

tiger.sh --linker-check $pkgspec
tiger.sh --arch-check $pkgspec $ppc64

if test -e config.cache ; then
    mkdir -p /opt/$pkgspec/share/tiger.sh/$pkgspec
    gzip -9 config.cache
    mv config.cache.gz /opt/$pkgspec/share/tiger.sh/$pkgspec/
fi