#!/bin/sh

# configure -- compiler/linker configuration for the local platform
# 
# Please send bug reports and additions to the author at: firstName@lastName.com
# For suitable values of 'firstName' and 'lastName', see the following notice.

# Copyright (c) 2005, 2006 Ian Piumarta
# 
# All rights reserved.
# 
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the 'Software'),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, provided that the above copyright notice(s) and this
# permission notice appear in all copies of the Software and that both the
# above copyright notice(s) and this permission notice appear in supporting
# documentation.
# 
# THE SOFTWARE IS PROVIDED 'AS IS'.  USE ENTIRELY AT YOUR OWN RISK.

dohelp () {
    cat <<EOF
Usage: configure [options ...] filename ...

    --target=cpu-vendor-os - configure for target [guessed]
    --prefix=path          - install into path/{bin,lib} [/usr/local]

The following environment variables can be set before running configure
to change the defaults for the Id compiler (a summary of their final
values is printed during configuration):

    CC          - name of the C compiler
    CFLAGS      - flags to pass to cc every time
    MFLAGS      - cc flags identifying target archietcture
    OFLAGS      - cc flags when optimising
    O3FLAGS     - cc flags when optimising agressively
    PGFLAGS     - cc flags when profiling for performance
    CCFLAGS     - cc flags when compiling executable
    CCFLAGS_O   - cc flags when compiling object
    CCFLAGS_SO  - cc flags when compiling shared object
    LDFLAGS     - ld flags when linking executable
    LDFLAGS_O   - ld flags when linking object
    LDFLAGS_SO  - ld flags when linking shared object
    LDLIBS      - ld libraries when linking executable
    LDLIBS_O    - ld libraries when linking object
    LDLIBS_SO   - ld libraries when linking shared object
    OBJEXT      - executable file extension
    OBJEXT_O    - object file extension
    OBJEXT_SO   - shared object file extension
    GCDIR       - where to look for gc.a and include/gc.h
    SYSARCH	- architecture
    SYSOS	- operating system

Note: the compiler uses the installation prefix to find executables and
      libraries.  Moving configured files to any other location will
      break the compiler.

NOTE: this is not an 'autoconf'-style configure script.  DO NOT
      attempt to run it from the command line unless you REALLY
      know what you are doing.  Use 'make config' instead.
EOF
    exit 0
}

FILES=""

while [ $# -gt 0 ]; do
    case "$1" in
	--prefix=*)	PREFIX="${1#--prefix=}";  shift;;
	--target=*)	TARGET="${1#--target=}";  shift;;
	-*)		dohelp;;
	*)		FILES="$FILES $1"; shift;;
    esac
done

[ -z "$FILES" ] && dohelp

TARGET="${TARGET:-`sh ./boot/config.guess`}"

GCDIR=${GCDIR:-"gc6.7"}

ppc () {
    OFLAGS=${OFLAGS:-"-O"}
    O3FLAGS=${O3FLAGS:-"-O3 -mcpu=7450"}
    PGFLAGS=${PGFLAGS:-"-O3 -mcpu=7450"}
    SYSARCH="ppc"
}

arm () {
     OFLAGS=${OFLAGS:-"-O -mcpu=arm1136j-s -mfpu=vfp -mfloat-abi=softfp"}
     O3FLAGS=${O3FLAGS:-"-O3 -mcpu=arm1136j-s -mfpu=vfp -mfloat-abi=softfp"}
     PGFLAGS=${PGFLAGS:-"-O3"}
     SYSARCH="arm"
}

ia64 () {
    OFLAGS=${OFLAGS:-"-O"}
    O3FLAGS=${O3FLAGS:-"-O"}
    PGFLAGS=${PGFLAGS:-"-O"}
    SYSARCH="ia64"
}

i386 () {
    OFLAGS=${OFLAGS:-"-O"}
    O3FLAGS=${O3FLAGS:-"-O3 -march=prescott -fomit-frame-pointer -falign-functions=16 -funroll-loops"}
    PGFLAGS=${PGFLAGS:-"-O3 -march=prescott -falign-functions=16 -funroll-loops"}
    SYSARCH="i386"
}

arch_ppc () {
    MFLAGS="-arch ppc"
}

arch_386 () {
    MFLAGS="-arch i486"
}

darwin () {
    CC=${CC:-"cc"}
    PREFIX=${PREFIX:-"/usr/local/lib/idc/$TARGET/"}
    CFLAGS=${CFLAGS:-"-g -Wall -Wreturn-type -Werror -fno-common"}
    OBJEXT_O=${OBJEXT_O:-".o"}
    CCFLAGS_O=${CCFLAGS_O:-"-c"}
    LDFLAGS_SO=${LDFLAGS_SO:-"-bundle -flat_namespace -undefined suppress"}
    OBJEXT_SO=${OBJEXT_SO:-".so"}
    SYSOS="darwin"
}

bsd () {
    CC=${CC:-"cc"}
    PREFIX=${PREFIX:-"/usr/local/lib/idc/$TARGET/"}
    CFLAGS=${CFLAGS:-"-g -Wall -Wreturn-type -Werror -D_GNU_SOURCE=1"}
    LDFLAGS=${LDFLAGS:-"-export-dynamic"}
    CCFLAGS_O=${CCFLAGS_O:-"-c"}
    OBJEXT_O=${OBJEXT_O:-".o"}
    LDFLAGS_SO=${LDFLAGS_SO:-"-shared"}
    OBJEXT_SO=${OBJEXT_SO:-".so"}
    SYSOS="bsd"
}

pic () {
    CCFLAGS_SO="$CCFLAGS_SO -fpic"
}

cygwin () {
    CC=${CC:-"gcc"}
    PREFIX=${PREFIX:-"/usr/local/lib/idc/$TARGET/"}
    CFLAGS=${CFLAGS:-"-g -Wall -Wreturn-type -Werror"}
    LDFLAGS=${LDFLAGS:-"-Wl,--export-all-symbols"}
    OBJEXT=${OBJEXT:-".exe"}
    CCFLAGS_O=${CCFLAGS_O:-"-c"}
    OBJEXT_O=${OBJEXT_O:-".o"}
    LDFLAGS_SO=${LDFLAGS_SO:-"-shared"}
    OBJEXT_SO=${OBJEXT_SO:-".so"}
    SYSOS="win32"
}

mingw32 () {
    CC=${CC:-"gcc"}
    PREFIX=${PREFIX:-"/usr/local/lib/idc/$TARGET/"}
    CFLAGS=${CFLAGS:-"-g -Wall -Wreturn-type -Werror -mno-cygwin"}
    LDFLAGS=${LDFLAGS:-"-Wl,--export-all-symbols"}
    CCFLAGS_O=${CCFLAGS_O:-"-c"}
    OBJEXT_O=${OBJEXT_O:-".o"}
    LDFLAGS_SO=${LDFLAGS_SO:-"-shared"}
    OBJEXT_SO=${OBJEXT_SO:-".so"}
    SYSOS="win32"
}

linux () {
    CC=${CC:-"cc"}
    PREFIX=${PREFIX:-"/usr/local/lib/idc/$TARGET/"}
    CFLAGS=${CFLAGS:-"-g -Wall -Wreturn-type -Werror -D_GNU_SOURCE=1 -Wno-unused-value"}
    LDFLAGS=${LDFLAGS:-"-export-dynamic"}
    LDLIBS=${LDLIBS:-"-ldl -lm"}
    CCFLAGS_O=${CCFLAGS_O:-"-c"}
    OBJEXT_O=${OBJEXT_O:-".o"}
    LDFLAGS_SO=${LDFLAGS_SO:-"-shared"}
    OBJEXT_SO=${OBJEXT_SO:-".so"}
    SYSOS="linux"
}

case $TARGET in
    powerpc-*-darwin*)		ppc;	darwin;	arch_ppc	;;
    powerpc-*-netbsd*)		ppc;	bsd;	pic		;;
    powerpc-*-linux-gnu)	ppc;	linux			;;
    arm*-*-linux-gnu)		arm;	linux			;;
    ia64-*-linux-gnu)		ia64;	linux			;;
    i[3456789]86-*-darwin*)	i386;	darwin;	arch_386	;;
    i[3456789]86-*-linux*)	i386;	linux;	pic		;;
    i[3456789]86-*-freebsd*)	i386;	bsd			;;
    *cygwin)			i386;	cygwin			;;
    *mingw32)			i386;	mingw32			;;
    *)
	echo "Target '$TARGET' is not recognised."
	echo
	echo "Please look at the 'configure' script and figure out the compiler and"
	echo "linker flags appropriate for your platform.  Then add a line for your"
	echo "platform to the 'case' statement (along with any new functions that it"
	echo "might need, in the spirit of what's already there).  When everything"
	echo "seems to be working, please send a copy of your modified 'configure'"
	echo "file to the original author at: 'firstName@lastName.com'.  (Suitable"
	echo "values for 'firstName' and 'lastName' can be found by looking at the"
	echo "beginning of the 'configure' file.)  Thank-you!"
	exit 1
	;;
esac

echo "$TARGET:"
echo "  TARGET     = $TARGET"
echo "  PREFIX     = $PREFIX"
echo "  CC         = $CC"
echo "  CFLAGS     = $CFLAGS"
echo "  MFLAGS     = $MFLAGS"
echo "  OFLAGS     = $OFLAGS"
echo "  O3FLAGS    = $O3FLAGS"
echo "  PGFLAGS    = $PGFLAGS"
echo "  CCFLAGS    = $CCFLAGS"
echo "  LDFLAGS    = $LDFLAGS"
echo "  LDLIBS     = $LDLIBS"
echo "  OBJEXT     = $OBJEXT"
echo "  CCFLAGS_O  = $CCFLAGS_O"
echo "  LDFLAGS_O  = $LDFLAGS_O"
echo "  LDLIBS_O   = $LDLIBS_O"
echo "  OBJEXT_O   = $OBJEXT_O"
echo "  CCFLAGS_SO = $CCFLAGS_SO"
echo "  LDFLAGS_SO = $LDFLAGS_SO"
echo "  LDLIBS_SO  = $LDLIBS_SO"
echo "  OBJEXT_SO  = $OBJEXT_SO"
echo "  GCDIR      = $GCDIR"
echo "  SYSARCH    = $SYSARCH"
echo "  SYSOS      = $SYSOS"

for file in $FILES; do
  if test -f $file.in; then
    echo "creating $file"
    sed "
s:@TARGET@:$TARGET:g;
s:@PREFIX@:$PREFIX:g;
s:@CC@:$CC:g;
s:@CFLAGS@:$CFLAGS:g;
s:@MFLAGS@:$MFLAGS:g;
s:@OFLAGS@:$OFLAGS:g;
s:@O3FLAGS@:$O3FLAGS:g;
s:@PGFLAGS@:$PGFLAGS:g;
s:@CCFLAGS@:$CCFLAGS:g;
s:@CCFLAGS_O@:$CCFLAGS_O:g;
s:@CCFLAGS_SO@:$CCFLAGS_SO:g;
s:@LDFLAGS@:$LDFLAGS:g;
s:@LDFLAGS_O@:$LDFLAGS_O:g;
s:@LDFLAGS_SO@:$LDFLAGS_SO:g;
s:@LDLIBS@:$LDLIBS:g;
s:@LDLIBS_O@:$LDLIBS_O:g;
s:@LDLIBS_SO@:$LDLIBS_SO:g;
s:@OBJEXT@:$OBJEXT:g;
s:@OBJEXT_O@:$OBJEXT_O:g;
s:@OBJEXT_SO@:$OBJEXT_SO:g;
s:@GCDIR@:$GCDIR:g;
s:@SYSARCH@:$SYSARCH:g;
s:@SYSOS@:$SYSOS:g;
" < $file.in > $file
    chmod +x $file
  fi
done