# $Id: configure.in,v 1.23 2000/01/07 22:19:46 lord Exp $
dnl	This file is an input file used by the GNU "autoconf" program to
dnl	generate the file "configure", which is run to configure the
dnl	Makefile in this directory.
AC_INIT(jikes.cpp)
AC_PREREQ(2.13)

# Convert srcdir into full path name
srcdir=`cd $srcdir ; pwd`
echo "srcdir is $srcdir"

# Let configure look for a c and c++ compiler and find the system
# defined object and executable extensions. Also do some extra
# checks to find out if we are running in a cygwin environment

AC_LANG_CPLUSPLUS
AC_PROG_CXX
AC_CYGWIN
AC_OBJEXT
AC_EXEEXT

# FIXME : bug in autoconf 2.13 in the AC_EXEEXT macro. If the lang
# is set to C++ the extension will be .C, which confuses the macro
# and makes it think the executable extension is ".C". We currently
# work around this by just setting EXEEXT to .exe on windows.
EXEEXT=""

#--------------------------------------------------------------------
#	see if --with-jikespg location is given on the command line
#--------------------------------------------------------------------

AC_ARG_WITH(jikespg, [  --with-jikespg=PROG     location of jikes parser generator (optional)],
    JIKESPG=$withval, JIKESPG=NONE)

if test "$JIKESPG" != "NONE"; then
    if test ! -f "$JIKESPG" || test ! -x "$JIKESPG"; then
        AC_MSG_ERROR([jikespg argument '$JIKESPG' is not a file or is not executable])
    fi
else
    JIKESPG=jikespg
fi

#--------------------------------------------------------------------
#	see if --with-icc is given on the command line
#--------------------------------------------------------------------

AC_ARG_WITH(icc, [  --with-icc=PROG         use the IBM Cset++ compiler, optional PROG can be given instead of searching on the PATH],
    DESIRED_CXX=$withval, DESIRED_CXX=NONE)

if test "$DESIRED_CXX" != "NONE"; then
    if test "$DESIRED_CXX" = yes; then
        AC_PATH_PROG(CXX, icc)

        if test "$CXX" = ""; then
            AC_PATH_PROG(CXX, xlC)

            if test "$CXX" = ""; then
                AC_MSG_ERROR([could not find icc or xlC on your PATH.])
            fi
        fi
    fi

    if test ! -f "$CXX" || test ! -x "$CXX"; then
        AC_MSG_ERROR([argument '$CXX' is not a file or is not executable])
    fi

    CXX_NAME=icc
    CXXREQUIREDFLAGS="-c -DICC"
    CXXOPTFLAGS="-O2"
    CXXDEBUGFLAGS="-DTEST"
    LD=$CXX
    LDDEBUGFLAGS="-g"
    LDFLAGS='-L. -o $(EXECUTABLE)'
fi

#--------------------------------------------------------------------
#	see if --with-CC is given on the command line
#--------------------------------------------------------------------

AC_ARG_WITH(CC, [  --with-CC=PROG          use the AT&T CC compiler, optional PROG can be given instead of searching on the PATH],
    DESIRED_CXX=$withval, DESIRED_CXX=NONE)

if test "$DESIRED_CXX" != "NONE"; then
    if test "$DESIRED_CXX" = yes; then
        AC_PATH_PROG(CXX, CC)
        if test "$CXX" = ""; then
            AC_MSG_ERROR([could not find CC on your PATH.])
        fi
    fi

    if test ! -f "$CXX" || test ! -x "$CXX"; then
        AC_MSG_ERROR([argument '$CXX' is not a file or is not executable])
    fi

    CXX_NAME=CC

    CXXREQUIREDFLAGS="-c -ansi"
    CXXOPTFLAGS="-fast"
    CXXDEBUGFLAGS="-DTEST -g -xs"
    LD=$CXX
    LDDEBUGFLAGS="-g"
    LDFLAGS='-L. -o $(EXECUTABLE)'
fi

#--------------------------------------------------------------------
#	see if --with-mingwin is given on the command line
#--------------------------------------------------------------------

AC_ARG_WITH(mingwin, [  --with-mingwin          use the mingwin32 compiler environment],
    WITH_MINGWIN=$withval, WITH_MINGWIN=0)

#--------------------------------------------------------------------
# If no other compiler was given as a --with option then we use default
#--------------------------------------------------------------------

if test "$CXX_NAME" = ""; then
    CXX_NAME="$CXX"

    CXXREQUIREDFLAGS="-c"
    if test "$WITH_MINGWIN" = "0"; then
        CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -ansi"
    fi
    CXXOPTFLAGS="-O2"
    CXXDEBUGFLAGS="-DTEST -g"
    LD="$CXX"
    LDDEBUGFLAGS="-g"
    LDFLAGS='-L. -o $(EXECUTABLE)'

    if test "$GXX" != "yes"; then
       LIBS="$LIBS -lm"
    fi
fi

#--------------------------------------------------------------------
# Do some extra work to find the mingwin include files in case
# that mingwin can not find them on its own.
#--------------------------------------------------------------------

if test "$WITH_MINGWIN" != "0"; then
    AC_PATH_PROG(TMP_PROG, c++)
    if test "$TMP_PROG" = ""; then
        AC_MSG_ERROR([Could not find c++ on the PATH])
    fi

    CYGROOT=`dirname $TMP_PROG`
    CYGROOT=`dirname $CYGROOT`
    if test "${CYGROOT}" = "/"; then
        CYGROOT=
    fi

    MING_INCLUDE=`ls ${CYGROOT}/*/include/*/direct.h`

    if test "$MING_INCLUDE" != ""; then
        MING_INCLUDE=`dirname $MING_INCLUDE`
        CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -I$MING_INCLUDE"
        CXXFLAGS="$CXXFLAGS -I$MING_INCLUDE"
    fi
fi


# echo the compiler we are using

AC_MSG_CHECKING([for the compiler to use])
AC_MSG_RESULT([$CXX.])


# Figure out what platform we are running on so that we know
# what flags to give to the compiler


# Keep case statements in alphabetical order.
case "`uname -s`" in
    AIX)
        if test $CXX_NAME = "icc"; then
            CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -langlvl=ansi -qnotempinc -+ -qinlglue"
            CXXDEBUGFLAGS="$CXXDEBUGFLAGS -g"
        fi

        CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DUNIX"
        LDFLAGS="$LDFLAGS $LDDEBUGFLAGS"
        ;;
    FreeBSD)
	CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DUNIX -DIEEE_DIV_0 -DGNU_LIBC5"

        if test $GXX = "yes"; then
            CXXREQUIREDFLAGS="-funsigned-char $CXXREQUIREDFLAGS"
        fi

	# Check byte-order
        case "`uname -m`" in
            alpha)
                ;;
            i?86)
                ;;
            *)
                AC_MSG_ERROR([FreeBSD arch '`uname -m`' not supported.])
                ;;
        esac
	;;
    HP-UX)
        if test $GXX = "yes"; then
            CXXREQUIREDFLAGS="-funsigned-char $CXXREQUIREDFLAGS"
        fi
        CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DUNIX -D_INCLUDE_POSIX_SOURCE"
        CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DSTAT_POSIX_1"
        LDFLAGS="$LDDEBUGFLAGS $LDFLAGS -lstdc++"
        ;;
    IRIX)
        CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DUNIX "
        if test $GAS != "yes"; then
            CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -mmips-as"
        fi
        ;;
    GNU)
        # Basically the same as for Linux but we are sure to use GNU libc6
        # and the HURD only runs on i386
        CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DUNIX"

        if test $GXX = "yes"; then
          CXXREQUIREDFLAGS="-funsigned-char $CXXREQUIREDFLAGS"
        fi

        CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DSTAT_POSIX"
        ;;
    Linux)
	CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DUNIX"

        if test $GXX = "yes"; then
            CXXREQUIREDFLAGS="-funsigned-char $CXXREQUIREDFLAGS"
        fi

        # test to see if we are using libc5 or gnulib5 (libc6)
        if test -f /lib/libc.so.5 && test ! -f /lib/libc.so.6; then
            CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DGNU_LIBC5"
        else
            CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DSTAT_POSIX"
        fi
        ;;
    OS2)
        if test $CXX_NAME = icc; then
           O=obj
           CXXREQUIREDFLAGS="-Tdp -G5 $CXXREQUIREDFLAGS -DUNIX_FILE_SYSTEM -Dcerr=cout"
           CXXOPTFLAGS="$CXXOPTFLAGS -Tdp -O -DNDEBUG"
           CXXDEBUGFLAGS="$CXXDEBUGFLAGS -Ti"
           LDDEBUGFLAGS="/Ti+"
           LDFLAGS="$LDFLAGS /O:\$(EXECUTABLE) /PM:VIO /STACK:400000 /NOE"

           # link to an obj file in the icc directory
           TMP=$CXX
           TMP=`dirname $TMP`
           TMP=`dirname $TMP`
           SYSOBJECTS="$TMP\\lib\\setargv.obj"
        fi    
        ;;
    OSF1)
        CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DUNIX"
        ;;
    SunOS)
        CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DUNIX"

        if test $CXX_NAME = "icc"; then
                CXXREQUIREDFLAGS="-langlvl=ansi -+ -qnotempinc $CXXREQUIREDFLAGS"
                CXXOPTFLAGS="$CXXOPTFLAGS -O3 -qstrict"
                CXXDEBUGFLAGS="$CXXDEBUGFLAGS -g"
                LDFLAGS="$LDFLAGS -Bstatic"
       else
                if test $GXX = "yes"; then
                        CXXREQUIREDFLAGS="-funsigned-char $CXXREQUIREDFLAGS"
                fi
       fi
	;;
    *CYGWIN*)
        if test $WITH_MINGWIN = "0"; then
            CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DUNIX -DCYGWIN"
        else
            # FIXME: buggy mingwin will not link to msvcrtd.dll
            LIBS="$LIBS -lmsvcrt"
            #if test "$DEBUG_SYMBOLS" = "yes"; then
            #    LIBS="$LIBS -lmsvcrtd"
            #else
            #    LIBS="$LIBS -lmsvcrt"
            #fi
            CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -mno-cygwin -DMINGWIN -DWIN32_FILE_SYSTEM"
            LDFLAGS="$LDFLAGS -mno-cygwin"

            # We also need to set CXXFLAGS so that tests below use these flags
            CXXFLAGS="$CXXFLAGS -mno-cygwin"
        fi

        if test $GXX = "yes"; then
            CXXREQUIREDFLAGS="-funsigned-char $CXXREQUIREDFLAGS"
        fi

        # FIXME : workaround for bug in AC_EXEEXT macro
        EXEEXT=.exe

        ;;
    AmigaOS)
	CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DBIGENDIAN -Dstat=mystat -Dfopen=myfopen -Dopendir=myopendir -Dmkdir=mymkdir"
	SYSOBJECTS="GG:lib/libnix/swapstack.o -noixemul"
	case "$CC_NAME" in
	    ?++)
		CXXREQUIREDFLAGS="-funsigned-char $CXXREQUIREDFLAGS"
		;;
	esac
	;;
    *)
        AC_MSG_ERROR([platform '`uname -s`' is not supported.])
        ;;
esac


#--------------------------------------------------------------------
#   Check for endianness
#--------------------------------------------------------------------
AC_C_BIGENDIAN

#--------------------------------------------------------------------
#   see if "bool" is a builtin type
#--------------------------------------------------------------------

AC_CACHE_CHECK(builtin bool type, jikes_cv_has_bool,
    AC_TRY_COMPILE([],[bool some_boolean_value = true;],
    jikes_cv_has_bool=yes, jikes_cv_has_bool=no))
if test "x$jikes_cv_has_bool" = "xyes"; then
    CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DHAVE_BOOL"
fi

#--------------------------------------------------------------------------
#   Check for broken USHRT_MAX (under Mingwin and maybe some other systems
#--------------------------------------------------------------------------

AC_CACHE_CHECK(for broken ushrt_max, jikes_cv_ushrt_max_is_broken,
    AC_TRY_COMPILE([
#include <limits.h>
#if ! (USHRT_MAX == 0xFFFF)
int hi=0;
#endif
],[return 0;],
    jikes_cv_ushrt_max_is_broken=no, jikes_cv_ushrt_max_is_broken=yes))
if test "$jikes_cv_ushrt_max_is_broken" = "yes"; then
    CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DBROKEN_USHRT_MAX"
fi

#----------------------------------------------------------------------------------
#   Check for some headers which are not present on all supported platforms
#----------------------------------------------------------------------------------
AC_CHECK_HEADERS(wchar.h)

#--------------------------------------------------------------------
#   Check for wint_t in wchar.h (broken on linux libc5, cygwin, maybe others?)
#--------------------------------------------------------------------
AC_CACHE_CHECK(for wint_t in wchar.h, jikes_cv_has_wint_t,
    AC_TRY_COMPILE([
#ifdef HAVE_WCHAR_H
# include <wchar.h>
#endif
],[wint_t foo;],
        CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DHAVE_WINT_T" 
        jikes_cv_has_wint_t=yes, 
        jikes_cv_has_wint_t=no))

if test $jikes_cv_has_wint_t = "no"; then
    AC_TRY_COMPILE([
#ifdef HAVE_WCHAR_H
# include <wchar.h>
#endif
typedef unsigned int wint_t;
],[wint_t foo;],
    ,
    AC_MSG_ERROR([Can't fix broken wchar.h]))
fi

#--------------------------------------------------------------------
#   Check for wcs functions in wchar.h or string.h
#   We want to treat "implicit declaration of function" types of
#   warnings as errors here because g++ does not do that by itself.
#--------------------------------------------------------------------

ac_saved_cxx_flags=$CXXFLAGS
if test $GXX = "yes"; then
    CXXFLAGS="$CXXFLAGS -Werror"
fi

AC_CACHE_CHECK([for declaration of wcslen],
    ac_cv_declared_wcslen,
[AC_TRY_COMPILE([
#ifdef HAVE_WCHAR_H
# include <wchar.h>
#endif
#include <string.h>
], [ wcslen(NULL) ],
    ac_cv_declared_wcslen=yes, ac_cv_declared_wcslen=no)
])
if test "x$ac_cv_declared_wcslen" = "xyes"; then
    CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DHAVE_WCSLEN"
fi

AC_CACHE_CHECK([for declaration of wcscpy],
    ac_cv_declared_wcscpy,
[AC_TRY_COMPILE([
#ifdef HAVE_WCHAR_H
# include <wchar.h>
#endif
#include <string.h>
], [ wcscpy(NULL, NULL) ],
    ac_cv_declared_wcscpy=yes, ac_cv_declared_wcscpy=no)
])
if test "x$ac_cv_declared_wcscpy" = "xyes"; then
    CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DHAVE_WCSCPY"
fi

AC_CACHE_CHECK([for declaration of wcsncpy],
    ac_cv_declared_wcsncpy,
[AC_TRY_COMPILE([
#ifdef HAVE_WCHAR_H
# include <wchar.h>
#endif
#include <string.h>
], [ wcsncpy(NULL, NULL, 0) ],
    ac_cv_declared_wcsncpy=yes, ac_cv_declared_wcsncpy=no)
])
if test "x$ac_cv_declared_wcsncpy" = "xyes"; then
    CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DHAVE_WCSNCPY"
fi

AC_CACHE_CHECK([for declaration of wcscat],
    ac_cv_declared_wcscat,
[AC_TRY_COMPILE([
#ifdef HAVE_WCHAR_H
# include <wchar.h>
#endif
#include <string.h>
], [ wcscat(NULL, NULL) ],
    ac_cv_declared_wcscat=yes, ac_cv_declared_wcscat=no)
])
if test "x$ac_cv_declared_wcscat" = "xyes"; then
    CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DHAVE_WCSCAT"
fi

AC_CACHE_CHECK([for declaration of wcscmp],
    ac_cv_declared_wcscmp,
[AC_TRY_COMPILE([
#ifdef HAVE_WCHAR_H
# include <wchar.h>
#endif
#include <string.h>
], [ wcscmp(NULL, NULL) ],
    ac_cv_declared_wcscmp=yes, ac_cv_declared_wcscmp=no)
])
if test "x$ac_cv_declared_wcscmp" = "xyes"; then
    CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DHAVE_WCSCMP"
fi

AC_CACHE_CHECK([for declaration of wcsncmp],
    ac_cv_declared_wcsncmp,
[AC_TRY_COMPILE([
#ifdef HAVE_WCHAR_H
# include <wchar.h>
#endif
#include <string.h>
], [ wcsncmp(NULL, NULL, 0) ],
    ac_cv_declared_wcsncmp=yes, ac_cv_declared_wcsncmp=no)
])
if test "x$ac_cv_declared_wcsncmp" = "xyes"; then
    CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DHAVE_WCSNCMP"
fi

CXXFLAGS=$ac_saved_cxx_flags

#--------------------------------------------------------------------
#   Check if "IBM Classes for UNICODE library is present
#--------------------------------------------------------------------
ac_saved_ld_flags=$LDFLAGS
LDFLAGS=
AC_CHECK_LIB(icu-uc,ucnv_getDefaultName, CXXREQUIREDFLAGS="$CXXREQUIREDFLAGS -DHAVE_LIB_ICU_UC"; LIBS="$LIBS -licu-uc")
LDFLAGS=$ac_saved_ld_flags

#--------------------------------------------------------------------
#   Check for java runtime and compiler
#--------------------------------------------------------------------

# First check for SUN javac
AC_CHECK_PROG(JAVAC, javac , javac, NONE) 
if test "$JAVAC" != "NONE"; then
    DO=NOTHING
else
    # if SUN javac not found, check for jikes
    AC_CHECK_PROG(JAVAC, jikes , jikes, NONE)
    # no specific flags for jikes
    if test "$JAVAC" != "NONE"; then
        DO=NOTHING
    else
        AC_MSG_WARN([Could not find javac or jikes on the path, you may want to
compile gencode.java and run it on your own.])
    fi
fi

AC_CHECK_PROG(JAVA,  java ,  java,  NONE)
if test "$JAVA" != "NONE"; then
    # We need to create code.h and code.cpp in srcdir not the
    # build dir because the Makefile looks for them in srcdir
    here=`pwd`
    cd ${srcdir}
    $JAVAC gencode.java
    CLASSPATH=. ; export CLASSPATH
    $JAVA gencode
    cd ${here}
fi


# The OBJEXT and EXEEXT variables are set in the AC_OBJEXT
# and AC_EXEEXT macros.

ERASE="rm -f"
O=${OBJEXT}
EXECUTABLE=jikes${EXEEXT}

#--------------------------------------------------------------------
#	see if --enable-debug was given, if so use debug symbols
#--------------------------------------------------------------------

AC_ARG_ENABLE(debug, [  --enable-debug          build with debugging symbols],
    [DEBUG_SYMBOLS=$enableval], [DEBUG_SYMBOLS=no])

if test "x$DEBUG_SYMBOLS" = "xyes"; then
    CXXFLAGS='$(CXXREQUIREDFLAGS) $(CXXDEBUGFLAGS)'
else
    CXXFLAGS='$(CXXREQUIREDFLAGS) $(CXXOPTFLAGS)'
    LDFLAGS="-s $LDFLAGS"
fi

# Subst variables into Makefile.in to produce the Makefile

BUILD_DIR=`pwd`
AC_SUBST(BUILD_DIR)

AC_SUBST(CXX)
AC_SUBST(CXXREQUIREDFLAGS)
AC_SUBST(CXXDEBUGFLAGS)
AC_SUBST(CXXOPTFLAGS)
AC_SUBST(CXXFLAGS)
AC_SUBST(ERASE)
AC_SUBST(EXECUTABLE)
AC_SUBST(LD)
AC_SUBST(LDFLAGS)
AC_SUBST(O)
AC_SUBST(SYSOBJECTS)
AC_SUBST(LIBS)

AC_OUTPUT([Makefile])