# hivex
# Copyright (C) 2009-2010 Red Hat Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

# major/minor/release must be numbers
m4_define([hivex_major],   [1])
m4_define([hivex_minor],   [0])
m4_define([hivex_release], [75])
# extra can be any string
m4_define([hivex_extra],   [])

AC_INIT([hivex],hivex_major.hivex_minor.hivex_release[]hivex_extra)
AC_CONFIG_AUX_DIR([build-aux])
AM_INIT_AUTOMAKE([foreign])

m4_ifndef([AM_SILENT_RULES], [m4_define([AM_SILENT_RULES],[])])
AM_SILENT_RULES([yes]) # make --enable-silent-rules the default.

AC_CONFIG_MACRO_DIR([m4])

dnl Split up the version string.
AC_DEFINE([PACKAGE_VERSION_MAJOR],[hivex_major],[Major version number])
AC_DEFINE([PACKAGE_VERSION_MINOR],[hivex_minor],[Minor version number])
AC_DEFINE([PACKAGE_VERSION_RELEASE],[hivex_release],[Release number])
AC_DEFINE([PACKAGE_VERSION_EXTRA],["hivex_extra"],[Extra version string])

gl_EARLY
gl_INIT

AC_PROG_LIBTOOL

dnl Check for basic C environment.
AC_PROG_CC_STDC
AC_PROG_INSTALL
AC_PROG_CPP

AC_ARG_ENABLE([gcc-warnings],
  [AS_HELP_STRING([--enable-gcc-warnings],
                  [turn on lots of GCC warnings (for developers)])],
  [case $enableval in
     yes|no) ;;
     *)      AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
   esac
   gl_gcc_warnings=$enableval],
  [gl_gcc_warnings=no]
)

if test "$gl_gcc_warnings" = yes; then
  gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
  AC_SUBST([WERROR_CFLAGS])

  nw=
  # This, $nw, is the list of warnings we disable.
  nw="$nw -Wdeclaration-after-statement" # too useful to forbid
  nw="$nw -Waggregate-return"       # anachronistic
  nw="$nw -Wc++-compat"             # We don't care about C++ compilers
  nw="$nw -Wundef"                  # Warns on '#if GNULIB_FOO' etc in gnulib
  nw="$nw -Wtraditional"            # Warns on #elif which we use often
  nw="$nw -Wcast-qual"              # Too many warnings for now
  nw="$nw -Wconversion"             # Too many warnings for now
  nw="$nw -Wsystem-headers"         # Don't let system headers trigger warnings
  nw="$nw -Wsign-conversion"        # Too many warnings for now
  nw="$nw -Wtraditional-conversion" # Too many warnings for now
  nw="$nw -Wunreachable-code"       # Too many warnings for now
  nw="$nw -Wpadded"                 # Our structs are not padded
  nw="$nw -Wredundant-decls"        # openat.h declares e.g., mkdirat
  nw="$nw -Wlogical-op"             # any use of fwrite provokes this
  nw="$nw -Wvla"                    # two warnings in mount.c
  # things I might fix soon:
  nw="$nw -Wmissing-format-attribute" # daemon.h's asprintf_nowarn
  nw="$nw -Winline"                 # daemon.h's asprintf_nowarn
  nw="$nw -Wshadow"                 # numerous, plus we're not unanimous
  # ?? -Wstrict-overflow
  nw="$nw -Wunsafe-loop-optimizations" # just a warning that an optimization
                                    # was not possible, safe to ignore
  nw="$nw -Wpacked"                 # Allow attribute((packed)) on structs

  gl_MANYWARN_ALL_GCC([ws])
  gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
  for w in $ws; do
    gl_WARN_ADD([$w])
  done
  gl_WARN_ADD([-Wno-unused-parameter]) # stubs.c
  gl_WARN_ADD([-Wno-jump-misses-init]) # stubs.c
  gl_WARN_ADD([-Wno-unused-variable]) # FIXME: only temporary, for guestfs_protocol.c, etc

  # In spite of excluding -Wlogical-op above, it is enabled, as of
  # gcc 4.5.0 20090517, and it provokes warnings in cat.c, dd.c, truncate.c
  gl_WARN_ADD([-Wno-logical-op])

  gl_WARN_ADD([-fdiagnostics-show-option])

  AC_SUBST([WARN_CFLAGS])

  AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
  AC_DEFINE([_FORTIFY_SOURCE], [2],
    [enable compile-time and run-time bounds-checking, and some warnings])
  AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])
fi

AC_C_PROTOTYPES
test "x$U" != "x" && AC_MSG_ERROR([Compiler not ANSI compliant])

AM_PROG_CC_C_O

dnl Check support for 64 bit file offsets.
AC_SYS_LARGEFILE

dnl Check sizeof long.
AC_CHECK_SIZEOF([long])

dnl Headers.
AC_CHECK_HEADERS([endian.h byteswap.h])

dnl Check for pod2man and pod2text.
AC_CHECK_PROG([POD2MAN],[pod2man],[pod2man],[no])
test "x$POD2MAN" = "xno" &&
     AC_MSG_ERROR([pod2man must be installed])
AC_CHECK_PROG([POD2TEXT],[pod2text],[pod2text],[no])
test "x$POD2TEXT" = "xno" &&
     AC_MSG_ERROR([pod2text must be installed])

dnl Readline.
AC_ARG_WITH([readline],
    [AS_HELP_STRING([--with-readline],
        [support fancy command line editing @<:@default=check@:>@])],
    [],
    [with_readline=check])

LIBREADLINE=
AS_IF([test "x$with_readline" != xno],
    [AC_CHECK_LIB([readline], [main],
        [AC_SUBST([LIBREADLINE], ["-lreadline -lncurses"])
         AC_DEFINE([HAVE_LIBREADLINE], [1],
                   [Define if you have libreadline])
        ],
        [if test "x$with_readline" != xcheck; then
         AC_MSG_FAILURE(
             [--with-readline was given, but test for readline failed])
         fi
        ], -lncurses)])

dnl For i18n.
AM_GNU_GETTEXT([external])
AM_GNU_GETTEXT_VERSION([0.17])

dnl libxml2.
PKG_CHECK_MODULES([LIBXML2], [libxml-2.0])
AC_SUBST([LIBXML2_CFLAGS])
AC_SUBST([LIBXML2_LIBS])

dnl Check for OCaml (optional, for OCaml bindings).
AC_PROG_OCAML
AC_PROG_FINDLIB
AM_CONDITIONAL([HAVE_OCAML],[test "x$OCAMLC" != "xno" -a "x$OCAMLFIND" != "xno"])

dnl Check for Perl (optional, for Perl bindings).
dnl XXX This isn't quite right, we should check for Perl devel library.
AC_CHECK_PROG([PERL],[perl],[perl],[no])

dnl Check for Perl modules that must be present to compile and
dnl test the Perl bindings.
missing_perl_modules=no
for pm in Test::More Test::Pod Test::Pod::Coverage ExtUtils::MakeMaker; do
    AC_MSG_CHECKING([for $pm])
    if ! perl -M$pm -e1 >/dev/null 2>&1; then
        AC_MSG_RESULT([no])
        missing_perl_modules=yes
    else
        AC_MSG_RESULT([yes])
    fi
done
if test "x$missing_perl_modules" = "xyes"; then
    AC_MSG_WARN([some Perl modules required to compile or test the Perl bindings are missing])
fi

AM_CONDITIONAL([HAVE_PERL],
    [test "x$PERL" != "xno" -a "x$missing_perl_modules" != "xyes"])

dnl Check for Python (optional, for Python bindings).
AC_CHECK_PROG([PYTHON],[python],[python],[no])

PYTHON_PREFIX=
PYTHON_VERSION=
PYTHON_INCLUDEDIR=
PYTHON_SITE_PACKAGES=

if test "x$PYTHON" != "xno"; then
    PYTHON_PREFIX=`$PYTHON -c "import sys; print sys.prefix"`
    PYTHON_VERSION=`$PYTHON -c "import sys; print sys.version[[0:3]]"`
    for d in \
        $PYTHON_PREFIX/include/python$PYTHON_VERSION \
        /usr/include/python$PYTHON_VERSION \
        /usr/local/include/python$PYTHON_VERSION
    do
        AC_MSG_CHECKING([Python.h in $d])
        if test -r "$d/Python.h"; then
            AC_MSG_RESULT([found])
            PYTHON_INCLUDEDIR=$d
            break
        fi
        AC_MSG_RESULT([not found])
    done
    for d in \
        $PYTHON_PREFIX/lib64/python$PYTHON_VERSION/site-packages \
        $PYTHON_PREFIX/lib/python$PYTHON_VERSION/site-packages \
        /usr/lib64/python$PYTHON_VERSION/site-packages \
        /usr/lib/python$PYTHON_VERSION/site-packages \
        /usr/local/lib/python$PYTHON_VERSION/site-packages
    do
        AC_MSG_CHECKING([for $d])
        if test -d "$d"; then
            AC_MSG_RESULT([found])
            PYTHON_SITE_PACKAGES=$d
            break
        fi
        AC_MSG_RESULT([not found])
    done
fi

AC_SUBST(PYTHON_PREFIX)
AC_SUBST(PYTHON_VERSION)
AC_SUBST(PYTHON_INCLUDEDIR)
AC_SUBST(PYTHON_SITE_PACKAGES)

AM_CONDITIONAL([HAVE_PYTHON],
    [test "x$PYTHON_INCLUDEDIR" != "x" -a "x$PYTHON_SITE_PACKAGES" != "x"])

dnl Check for Ruby and rake (optional, for Ruby bindings).
AC_CHECK_LIB([ruby],[ruby_init],[HAVE_LIBRUBY=1],[HAVE_LIBRUBY=0])
AC_CHECK_PROG([RAKE],[rake],[rake],[no])

AM_CONDITIONAL([HAVE_RUBY],
    [test "x$RAKE" != "xno" -a -n "$HAVE_LIBRUBY"])

dnl Check for Java.
AC_ARG_WITH(java_home,
    [AS_HELP_STRING([--with-java-home],
        [specify path to JDK directory @<:@default=check@:>@])],
    [],
    [with_java_home=check])

if test "x$with_java_home" != "xno"; then
    if test "x$with_java_home" != "xyes" -a "x$with_java_home" != "xcheck"
    then
        # Reject unsafe characters in $JAVA_HOME
        jh_lf='
'
        case $JAVA_HOME in
          *[\\\"\#\$\&\'\`$jh_lf\ \	]*)
            AC_MSG_FAILURE([unsafe \$JAVA_HOME directory (use --with-java-home=no to disable Java support)]);;
        esac
        if test -d "$with_java_home"; then
            JAVA_HOME="$with_java_home"
        else
            AC_MSG_FAILURE([$with_java_home is not a directory (use --with-java-home=no to disable Java support)])
        fi
    fi

    if test "x$JAVA_HOME" = "x"; then
        # Look for Java in some likely locations.
        for d in \
            /usr/lib/jvm/java \
            /usr/lib/jvm/java-6-openjdk
        do
            if test -d $d -a -f $d/bin/java; then
                JAVA_HOME=$d
                break
            fi
        done
    fi

    if test "x$JAVA_HOME" != "x"; then
        AC_MSG_CHECKING(for JDK in $JAVA_HOME)
        if test ! -x "$JAVA_HOME/bin/java"; then
            AC_MSG_ERROR([missing $JAVA_HOME/bin/java binary (use --with-java-home=no to disable Java support)])
        else
            JAVA="$JAVA_HOME/bin/java"
        fi
        if test ! -x "$JAVA_HOME/bin/javac"; then
            AC_MSG_ERROR([missing $JAVA_HOME/bin/javac binary])
        else
            JAVAC="$JAVA_HOME/bin/javac"
        fi
        if test ! -x "$JAVA_HOME/bin/javah"; then
            AC_MSG_ERROR([missing $JAVA_HOME/bin/javah binary])
        else
            JAVAH="$JAVA_HOME/bin/javah"
        fi
        if test ! -x "$JAVA_HOME/bin/javadoc"; then
            AC_MSG_ERROR([missing $JAVA_HOME/bin/javadoc binary])
        else
            JAVADOC="$JAVA_HOME/bin/javadoc"
        fi
        if test ! -x "$JAVA_HOME/bin/jar"; then
            AC_MSG_ERROR([missing $JAVA_HOME/bin/jar binary])
        else
            JAR="$JAVA_HOME/bin/jar"
        fi
        java_version=`$JAVA -version 2>&1 | grep "java version"`
        AC_MSG_RESULT(found $java_version in $JAVA_HOME)

        dnl Find jni.h.
        AC_MSG_CHECKING([for jni.h])
        if test -f "$JAVA_HOME/include/jni.h"; then
            JNI_CFLAGS="-I$JAVA_HOME/include"
        else
            if test "`find $JAVA_HOME -name jni.h`" != ""; then
                head=`find $JAVA_HOME -name jni.h | tail -1`
                dir=`dirname "$head"`
                JNI_CFLAGS="-I$dir"
            else
                AC_MSG_FAILURE([missing jni.h header file])
            fi
        fi
        AC_MSG_RESULT([$JNI_CFLAGS])

        dnl Find jni_md.h.
        AC_MSG_CHECKING([for jni_md.h])
        case "$build_os" in
        *linux*) system="linux" ;;
        *SunOS*) system="solaris" ;;
        *cygwin*) system="win32" ;;
        *) system="$build_os" ;;
        esac
        if test -f "$JAVA_HOME/include/$system/jni_md.h"; then
            JNI_CFLAGS="$JNI_CFLAGS -I$JAVA_HOME/include/$system"
        else
            if test "`find $JAVA_HOME -name jni_md.h`" != ""; then
                head=`find $JAVA_HOME -name jni_md.h | tail -1`
                dir=`dirname "$head"`
                JNI_CFLAGS="$JNI_CFLAGS -I$dir"
            else
                AC_MSG_FAILURE([missing jni_md.h header file])
            fi
        fi
        AC_MSG_RESULT([$JNI_CFLAGS])

        dnl Need extra version flag?
        AC_MSG_CHECKING([extra javac flags])
        JAVAC_FLAGS=
        javac_version=`$JAVAC -version 2>&1`
        case "$javac_version" in
        *Eclipse*)
            JAVAC_FLAGS="-source 1.5" ;;
        esac
        AC_MSG_RESULT([$JAVAC_FLAGS])

        dnl Where to install jarfiles.
        dnl XXX How to make it configurable?
        JAR_INSTALL_DIR=\${prefix}/share/java
        JNI_INSTALL_DIR=\${libdir}

        dnl JNI version.
        jni_major_version=`echo "$VERSION" | awk -F. '{print $1}'`
        jni_minor_version=`echo "$VERSION" | awk -F. '{print $2}'`
        jni_micro_version=`echo "$VERSION" | awk -F. '{print $3}'`
        JNI_VERSION_INFO=`expr "$jni_major_version" + "$jni_minor_version"`":$jni_micro_version:$jni_minor_version"
    fi
fi

AC_SUBST(JAVA_HOME)
AC_SUBST(JAVA)
AC_SUBST(JAVAC)
AC_SUBST(JAVAH)
AC_SUBST(JAVADOC)
AC_SUBST(JAR)
AC_SUBST(JNI_CFLAGS)
AC_SUBST(JAVAC_FLAGS)
AC_SUBST(JAR_INSTALL_DIR)
AC_SUBST(JNI_INSTALL_DIR)
AC_SUBST(JNI_VERSION_INFO)

AM_CONDITIONAL([HAVE_JAVA],[test -n "$JAVAC"])

dnl Check for Haskell (GHC).
AC_CHECK_PROG([GHC],[ghc],[ghc],[no])

AM_CONDITIONAL([HAVE_HASKELL],
    [test "x$GHC" != "xno"])

dnl Produce output files.
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_FILES([Makefile
                 gnulib/lib/Makefile
                 gnulib/tests/Makefile
                 hivex.pc
                 hivex/Makefile
                 hivex/tools/Makefile])
AC_OUTPUT

dnl Produce summary.
echo
echo
echo "------------------------------------------------------------"
echo "Thank you for downloading $PACKAGE_STRING"
echo
echo "This is how we have configured the optional components for you today:"
echo
echo -n "OCaml bindings ...................... "
if test "x$HAVE_OCAML_TRUE" = "x"; then echo "yes"; else echo "no"; fi
echo -n "Perl bindings ....................... "
if test "x$HAVE_PERL_TRUE" = "x"; then echo "yes"; else echo "no"; fi
echo -n "Python bindings ..................... "
if test "x$HAVE_PYTHON_TRUE" = "x"; then echo "yes"; else echo "no"; fi
echo -n "Ruby bindings ....................... "
if test "x$HAVE_RUBY_TRUE" = "x"; then echo "yes"; else echo "no"; fi
echo -n "Java bindings ....................... "
if test "x$HAVE_JAVA_TRUE" = "x"; then echo "yes"; else echo "no"; fi
echo -n "Haskell bindings .................... "
if test "x$HAVE_HASKELL" = "x"; then echo "yes"; else echo "no"; fi
echo
echo "If any optional component is configured 'no' when you expected 'yes'"
echo "then you should check the preceeding messages."
echo
echo "Please report bugs back to the mailing list:"
echo "http://www.redhat.com/mailman/listinfo/libguestfs"
echo
echo "Next you should type 'make' to build the package,"
echo "then 'make check' to run the tests."
echo "------------------------------------------------------------"