Problem with basic scripting

[Al]

Im having a very annoying problem. Im using the macro ac_jni_include_dirs
from the gnu archive to determine the location of the Java includes
directories. Ill paste it below for convenience. The suggested usage is

JAVAC="javac"
AC_JNI_INCLUDE_DIR
for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS
do
    CPPFLAGS="$CPPFLAGS -I$JNI_INCLUDE_DIR"
done

Now, Im using Cygwin on Windows 98 and 2k and it happens that in both cases
my java home is nestled in the awful C:\Program Files directory This causes
problems on 2k because CPPFLAGS comes out something like

-I/cygdrive/c/Program -IFiles/Java/include

, its alright on 98 as $JNI_INCLUDE_DIRS comes back with the short windows
paths, ie /cygdrive/c/Progra~1/...

I thought this could be dealt with simply by changing the macro to wrap each
path in double quotes, but that doesnt work. The above for loop the produces
something stupid like

-I" -I/cygdrive/c/Program -IFiles/Java/include

When I type the for loop into the shell directly with exactly the same value
of $JNI_INCLUDE_DIRS as is used during configuration, the loop works as you
would expect it to. Whats the deal with the diference running it via
configure?

In an effort to avoid the for loop altogether I tried using sed;

CPPFLAGS="$CPPFLAGS $(echo $JNI_INCLUDE_DIRS | sed 's,"[^"]",-I&,g')"

but that doesnt work

Any suggestions?

Alan

Ive made two slight modifications to the m4 source below. The first to
recognise cygwin and the second to wrap paths in "s as described above.

=== AC_JNI_INCLUDE_DIR by Don Anderson <address@hidden> ===

dnl Available from the GNU Autoconf Macro Archive at:
dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_jni_include_dirs.html
dnl
AC_DEFUN(AC_JNI_INCLUDE_DIR,[

JNI_INCLUDE_DIRS=""

test "x$JAVAC" = x && AC_MSG_ERROR(['$JAVAC' undefined])
AC_PATH_PROG(_ACJNI_JAVAC, $JAVAC, no)
test "x$_ACJNI_JAVAC" = xno && AC_MSG_ERROR([$JAVAC could not be found in
path])

_ACJNI_FOLLOW_SYMLINKS("$_ACJNI_JAVAC")
_JTOPDIR=`echo "$_ACJNI_FOLLOWED" | sed -e 's://*:/:g' -e 's:/[[^/]]*$::'`
case "$host_os" in
        darwin*)        _JTOPDIR=`echo "$_JTOPDIR" | sed -e 's:/[[^/]]*$::'`
                        _JINC="$_JTOPDIR/Headers";;
        *)              _JINC="$_JTOPDIR/include";;
esac
if test -f "$_JINC/jni.h"; then
        JNI_INCLUDE_DIRS="$JNI_INCLUDE_DIRS $_JINC"
else
        _JTOPDIR=`echo "$_JTOPDIR" | sed -e 's:/[[^/]]*$::'`
        if test -f "$_JTOPDIR/include/jni.h"; then
                JNI_INCLUDE_DIRS="$JNI_INCLUDE_DIRS $_JTOPDIR/include"
        else
                AC_MSG_ERROR([cannot find java include files])
        fi
fi

# get the likely subdirectories for system specific java includes
#
# CYGWIN CASE ADDED HERE
#
case "$host_os" in
*cygwin*)       _JNI_INC_SUBDIRS="win32";;
bsdi*)          _JNI_INC_SUBDIRS="bsdos";;
linux*)         _JNI_INC_SUBDIRS="linux genunix";;
osf*)           _JNI_INC_SUBDIRS="alpha";;
solaris*)       _JNI_INC_SUBDIRS="solaris";;
*)              _JNI_INC_SUBDIRS="genunix";;
esac

# add any subdirectories that are present
#
# CHANGED SO THAT EACH DIRECTORY PATH IS WRAPPED IN \"
#
for JINCSUBDIR in $_JNI_INC_SUBDIRS
do
        if test -d "$_JTOPDIR/include/$JINCSUBDIR"; then
                JNI_INCLUDE_DIRS="\"$JNI_INCLUDE_DIRS\"
\"$_JTOPDIR/include/$JINCSUBDIR\""
        fi
done
])

# _ACJNI_FOLLOW_SYMLINKS <path>
# Follows symbolic links on <path>,
# finally setting variable _ACJNI_FOLLOWED
# --------------------
AC_DEFUN(_ACJNI_FOLLOW_SYMLINKS,[
# find the include directory relative to the javac executable
_cur="$1"
while ls -ld "$_cur" 2>/dev/null | grep " -> " >/dev/null; do
        AC_MSG_CHECKING(symlink for $_cur)
        _slink=`ls -ld "$_cur" | sed 's/.* -> //'`
        case "$_slink" in
        /*) _cur="$_slink";;
        # 'X' avoids triggering unwanted echo options.
        *) _cur=`echo "X$_cur" | sed -e 's/^X//' -e
's:[[^/]]*$::'`"$_slink";;
        esac
        AC_MSG_RESULT($_cur)
done
_ACJNI_FOLLOWED="$_cur"
])# _ACJNI