dnl Process this file with autoconf to produce a configure script.

AC_INIT(encfs/encfs.h) dnl a source file from your sub dir
AM_INIT_AUTOMAKE(encfs, 1.4.1.1) dnl searches for some needed programs

dnl without this order in this file, automake will be confused!
dnl
AM_CONFIG_HEADER(config.h)

dnl This ksh/zsh feature conflicts with `cd blah ; pwd`
unset CDPATH

AC_LANG_CPLUSPLUS
AC_PROG_CXX
    
RELEASE=1
AC_SUBST(RELEASE)

dnl almost the same like KDE_SET_PEFIX but the path is /usr/local
dnl
unset CDPATH
dnl make /usr/local the default for the installation
AC_PREFIX_DEFAULT(/usr/local)

AM_GNU_GETTEXT([external])
AM_GNU_GETTEXT_VERSION(0.16.1)
AM_MKINSTALLDIRS
dnl AC_LIB_LINKFLAGS([asprintf]) # use internal copy

dnl create only shared libtool-libraries
dnl These can be overridden by command line arguments
AC_ENABLE_SHARED(yes)
AC_ENABLE_STATIC(no)

AM_CONDITIONAL( BUILD_STATIC, test "x$enable_static" = "xyes" )
dnl only build either static or shared, not both..
if test "x$enable_static" = "xyes"; then
    enable_shared=no
    AC_DEFINE(BUILD_STATIC, [1], [Building static library])
fi

AC_PROG_LIBTOOL

ACX_PTHREAD

dnl Need to include any user specified flags in the tests below, as they might
dnl specify required include directories..
FUSEFLAGS="-D_FILE_OFFSET_BITS=64 -DFUSE_USE_VERSION=26"
CPPFLAGS="$CPPFLAGS $USER_INCLUDES $FUSEFLAGS -D__STDC_FORMAT_MACROS"
CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS $USER_INCLUDES"
LDFLAGS="$LDFLAGS $PTHREAD_LIBS $USER_LDFLAGS"

if test "$GXX" = "yes"; then
    CXXFLAGS="-W -Wall -Wshadow -Wpointer-arith -Wwrite-strings $CXXFLAGS"
    dnl CXXFLAGS="$CXXFLAGS -Wformat=2 -Wconversion"
fi

AC_CHECK_HEADER(fuse.h,,
    [AC_MSG_ERROR([
	Can't find fuse.h - add the search path to CPPFLAGS and
	rerun configure, eg:
	export CPPFLAGS=-I/usr/local/include ])])
AC_CHECK_LIB(fuse,fuse_new, [FUSE_LIBS="-lfuse"],
    [AC_MSG_ERROR([
	Can't find libfuse.a - add the search path to LDFLAGS
	and rerun configure, eg:
	export LDFLAGS=-L/usr/local/lib ])],)

AC_CHECK_HEADERS([ulockmgr.h])
AC_CHECK_LIB(ulockmgr,ulockmgr_op, [FUSE_LIBS="$FUSE_LIBS -lulockmgr"])
AC_SUBST(FUSE_LIBS)

# check for a supported FUSE_MAJOR_VERSION.
AC_MSG_CHECKING([For supported FUSE API version])
AC_RUN_IFELSE([ 
    AC_LANG_PROGRAM([[#include "fuse.h"]],
[[
    if(FUSE_MAJOR_VERSION == 2 && FUSE_MINOR_VERSION >= 5)
    {
	return 0;
    } else
	return -1;
]])], 
    [AC_MSG_RESULT([yes])],
    [AC_MSG_RESULT([no])
    AC_MSG_FAILURE([
Encfs 1.3 requires FUSE 2.5 or newer.  Please check config.log for errors.  If
you cannot determine the problem, mail encfs-users@lists.sourceforge.net
and include the config.log file])
    ]
)

dnl fuse_operations.setxattr was added 2004-03-31
dnl only enable it if setxattr function is found..
AC_CHECK_HEADERS([attr/xattr.h sys/xattr.h])

dnl Check for valgrind headers..
AC_CHECK_HEADERS([valgrind/valgrind.h valgrind/memcheck.h])

# allow user option of not using ssl..
AC_ARG_ENABLE(openssl,
    AC_HELP_STRING([--disable-openssl],
		   [disables openssl library usage.]),
	with_openssl=$enableval, with_openssl="yes" )

# try checking for openssl using 
if test "x$with_openssl" = "xyes"; then
    # look for openssl using pkg-config first..
    PKG_CHECK_MODULES(OPENSSL, openssl >= 0.9.7,
	with_openssl="yes", with_openssl="old-test")

    # If that fails, try checking via old methods - which isn't as robust when
    # it comes to extra include paths, etc..
    if test "x$with_openssl" = "xold-test"; then
	AC_CHECK_HEADER(openssl/ssl.h,
	    AC_CHECK_LIB(ssl,SSL_new,
		[with_openssl="yes"]))
	OPENSSL_LIBS="-lssl"
    fi

    # if we have openssl, then examine available interfaces.
    if test "x$with_openssl" = "xyes"; then
	AC_DEFINE(HAVE_SSL, [1], [Linking with OpenSSL])

	# add in the libs just for the test..
	oldflags=$CXXFLAGS
	oldlibs=$LIBS
	CXXFLAGS="$CXXFLAGS $OPENSSL_CFLAGS"
	LIBS="$LIBS $OPENSSL_LIBS"
	AC_CHECK_FUNCS(EVP_aes_128_cbc EVP_aes_192_cbc EVP_aes_256_cbc,
	    AC_DEFINE(HAVE_EVP_AES, [1], [Have EVP AES interfaces]))
	AC_CHECK_FUNCS(EVP_bf_cbc,
	    AC_DEFINE(HAVE_EVP_BF, [1], [Have EVP Blowfish interfaces]))
	AC_CHECK_FUNCS(EVP_CIPHER_CTX_set_padding, 
	    with_opensslevp=yes,
	    AC_MSG_WARN([New SSL cipher code only enabled for OpenSSL 0.9.7 or later]))
	AC_CHECK_FUNCS(HMAC_Init_ex,
	    AC_DEFINE(HAVE_HMAC_INIT_EX, [1], [Have HMAC_Init_ex function]))
	
	CXXFLAGS="$oldflags"
	LIBS="$oldlibs"

	AC_SUBST(HAVE_EVP_AES)
	AC_SUBST(HAVE_EVP_BF)
	AC_SUBST(HAVE_HMAC_INIT_EX)
    fi
fi
AM_CONDITIONAL( BUILD_OPENSSL, test "x$with_openssl" = "xyes" )
AM_CONDITIONAL( BUILD_SSLCIPHER, test "x$with_opensslevp" = "xyes" )
AC_SUBST(HAVE_SSL)

if test "x$with_openssl" != "xyes"; then
    AC_MSG_ERROR( [Encfs requires OpenSSL])
fi

# check for RLOG
PKG_CHECK_MODULES(RLOG, librlog >= 1.3,
	with_rlog="yes", 
	[ # do old-style test instead..
	AC_MSG_WARN([Checking for librlog the hard way])
	AC_CHECK_LIB(rlog, RLogVersion, [RLOG_LIBS="-lrlog"],
	    [AC_MSG_ERROR([EncFS depends on librlog, by the same author.])]) ])

AC_CHECK_HEADER(boost/shared_ptr.hpp,,
    [AC_MSG_ERROR([
	Can't find boost/shared_.h - add the boost include dir to CPPFLAGS and
	rerun configure, eg:
	export CPPFLAGS=-I/usr/local/include ])])

# look for pod2man program for building man pages
AC_PATH_PROG(POD2MAN, pod2man, [no])
AC_PATH_PROG(POD2HTML, pod2html, [no])
AM_CONDITIONAL( BUILD_MAN, test "x$POD2MAN" != "xno" )
AM_CONDITIONAL( BUILD_MANHTML, test "x$POD2HTML" != "xno" )
AM_CONDITIONAL( BUILD_NLS, test "x$USE_NLS" != "xno" )


AC_CONFIG_FILES([Makefile] \
	[encfs/Makefile] \
	[encfs.spec] \
	[makedist2.sh] \
	[m4/Makefile] \
	[po/Makefile.in] \
	[po/Makefile])

AC_OUTPUT