dnl Some useful functions for LyXs configure.in                 -*- sh -*-
dnl Author: Jean-Marc Lasgouttes (Jean-Marc.Lasgouttes@inria.fr)
dnl         Lars Gullik Bjønnes (larsbj@lyx.org)
dnl         Allan Rae (rae@lyx.org)


dnl Usage LYX_CHECK_VERSION   Displays version of LyX being built and
dnl sets variables "lyx_devel_version" and "lyx_prerelease"
AC_DEFUN([LYX_CHECK_VERSION],[
echo "configuring LyX version $VERSION"
if echo "$VERSION" | grep 'cvs' >/dev/null ; then
  lyx_devel_version=yes
  AC_DEFINE(DEVEL_VERSION, 1, [Define if you are building a development version of LyX])
  echo "WARNING: This is a development version. Expect bugs."
else
  lyx_devel_version=no
fi
if echo "$VERSION" | grep 'pre' > /dev/null ; then
    lyx_prerelease=yes
    echo "WARNING: This is a prerelease. Be careful and backup your documents."
else
    lyx_prerelease=no
fi
AC_SUBST(lyx_devel_version)])


dnl Define the option to set a LyX version on installed executables and directories
dnl
dnl
AC_DEFUN([LYX_VERSION_SUFFIX],[
AC_MSG_CHECKING([for install target ... ])
RPM_VERSION_SUFFIX='""'
AC_ARG_WITH(version-suffix,
  [  --with-version-suffix[=<version>]  install lyx files as lyx<version>],
  [if test "x$withval" = "xyes";
   then
     withval="-$VERSION"
     ac_configure_args=`echo $ac_configure_args | sed "s,--with-version-suffix,--with-version-suffix=$withval,"`
   fi
   lyxname="lyx$withval"
   program_suffix=$withval
   RPM_VERSION_SUFFIX="--with-version-suffix=$withval"],
  [lyxname=lyx])
AC_SUBST(RPM_VERSION_SUFFIX)
AC_MSG_RESULT([$lyxname])
])


dnl Usage: LYX_ERROR(message)  Displays the warning "message" and sets the
dnl flag lyx_error to yes.
AC_DEFUN([LYX_ERROR],[
lyx_error_txt="$lyx_error_txt
** $1
"
lyx_error=yes])


dnl Usage: LYX_WARNING(message)  Displays the warning "message" and sets the
dnl flag lyx_warning to yes.
AC_DEFUN([LYX_WARNING],[
lyx_warning_txt="$lyx_warning_txt
== $1
"
lyx_warning=yes])


dnl Usage: LYX_LIB_ERROR(file,library)  Displays an error message indication
dnl  that 'file' cannot be found because 'lib' may be uncorrectly installed.
AC_DEFUN([LYX_LIB_ERROR],[
LYX_ERROR([Cannot find $1. Please check that the $2 library
   is correctly installed on your system.])])


dnl Usage: LYX_CHECK_ERRORS  Displays a warning message if a LYX_ERROR
dnl   has occured previously.
AC_DEFUN([LYX_CHECK_ERRORS],[
if test x$lyx_error = xyes; then
cat <<EOF
**** The following problems have been detected by configure.
**** Please check the messages below before running 'make'.
**** (see the section 'Problems' in the INSTALL file)
$lyx_error_txt
$lyx_warning_txt
EOF
else

if test x$lyx_warning = xyes; then
cat <<EOF
=== The following minor problems have been detected by configure.
=== Please check the messages below before running 'make'.
=== (see the section 'Problems' in the INSTALL file)
$lyx_warning_txt
EOF
fi
cat <<EOF
Configuration of LyX was successful.
Type 'make' to compile the program,
and then 'make install' to install it.
EOF
fi])


dnl LYX_SEARCH_PROG(VARIABLE-NAME,PROGRAMS-LIST,ACTION-IF-FOUND)
dnl
define(LYX_SEARCH_PROG,[dnl
for ac_prog in $2 ; do
# Extract the first word of "$ac_prog", so it can be a program name with args.
  set dummy $ac_prog ; ac_word=$[2]
  if test -z "[$]$1"; then
    IFS="${IFS=	}"; ac_save_ifs="$IFS"; IFS=":"
    for ac_dir in $PATH; do
      test -z "$ac_dir" && ac_dir=.
      if test -f [$ac_dir/$ac_word]; then
	$1="$ac_prog"
	break
      fi
    done
    IFS="$ac_save_ifs"
  fi

  if test -n "[$]$1"; then
    ac_result=yes
  else
    ac_result=no
  fi
  ifelse($3,,,[$3])
  test -n "[$]$1" && break
done
])dnl


AC_DEFUN([LYX_PROG_CXX_WORKS],
[rm -f conftest.C
cat >conftest.C <<EOF
class foo {
   // we require the mutable keyword
   mutable int bar;
 };
 // we require namespace support
 namespace baz {
   int bar;
 }
 int main() {
   return(0);
 }
EOF
$CXX -c $CXXFLAGS $CPPFLAGS conftest.C >&5 || CXX=
rm -f conftest.C conftest.o conftest.obj || true
])


AC_DEFUN([LYX_PROG_CXX],
[AC_MSG_CHECKING([for a good enough C++ compiler])
LYX_SEARCH_PROG(CXX, $CXX $CCC g++ gcc c++ CC cxx xlC cc++, [LYX_PROG_CXX_WORKS])

if test -z "$CXX" ; then
  AC_MSG_ERROR([Unable to find a good enough C++ compiler])
fi
AC_MSG_RESULT($CXX)

AC_PROG_CXX

### We might want to get or shut warnings.
AC_ARG_ENABLE(warnings,
  AC_HELP_STRING([--enable-warnings],[tell the compiler to display more warnings]),,
  [ if test $lyx_devel_version = yes -o $lyx_prerelease = yes && test $ac_cv_prog_gxx = yes ; then
	enable_warnings=yes;
    else
	enable_warnings=no;
    fi;])
if test x$enable_warnings = xyes ; then
  lyx_flags="warnings $lyx_flags"
  AC_DEFINE(WITH_WARNINGS, 1,
  [Define this if you want to see the warning directives put here and
   there by the developpers to get attention])
fi

### We might want to disable debug
AC_ARG_ENABLE(debug,
  AC_HELP_STRING([--enable-debug],[enable debug information]),,
  [ if test $lyx_devel_version = yes -o $lyx_prerelease = yes ; then
	enable_debug=yes;
    else
	enable_debug=no;
    fi;])

AC_ARG_ENABLE(stdlib-debug,
  AC_HELP_STRING([--enable-stdlib-debug],[enable debug mode in the standard library]),,
  [ if test $lyx_devel_version = yes -o $lyx_prerelease = yes ; then
      enable_stdlib_debug=yes;
    else
      enable_stdlib_debug=no;
    fi;])

AC_ARG_ENABLE(concept-checks,
  AC_HELP_STRING([--enable-concept-checks],[enable concept checks]),,
  [ if test $lyx_devel_version = yes -o $lyx-prerelease = yes ; then
	enable_concept_checks=yes;
    else
        enable_concept_checks=no;
    fi;])

### set up optimization
AC_ARG_ENABLE(optimization,
  AC_HELP_STRING([--enable-optimization[=value]],[enable compiler optimisation]),,
	enable_optimization=yes;)
case $enable_optimization in
  yes) lyx_opt=-O;;
   no) lyx_opt=;;
    *) lyx_opt=${enable_optimization};;
esac

AC_ARG_ENABLE(pch,
  AC_HELP_STRING([--enable-pch],[enable precompiled headers]),,
	enable_pch=yes;)
lyx_pch_comp=no

# set the compiler options correctly.
if test x$GXX = xyes; then
  dnl Useful for global version info
  gxx_version=`${CXX} -dumpversion`
  CXX_VERSION="($gxx_version)"

  if test "$ac_test_CXXFLAGS" = set; then
    CXXFLAGS="$ac_save_CXXFLAGS"
  else
      CFLAGS="$lyx_opt"
      CXXFLAGS="$lyx_opt"
    if test x$enable_debug = xyes ; then
        CFLAGS="-g $CFLAGS"
	CXXFLAGS="-g $CXXFLAGS"
    fi
    if test x$enable_warnings = xyes ; then
        case $gxx_version in
            2.*|3.1*|3.2*|3.3*)
                CPPFLAGS="-W -Wall $CPPFLAGS"
                ;;
            *)
                CPPFLAGS="-Wextra -Wall $CPPFLAGS "
                ;;
        esac
    fi
  fi
  case $gxx_version in
      2.95.1)  AM_CXXFLAGS="-fpermissive -ftemplate-depth-30";;
      2.95.*)  AM_CXXFLAGS="-Wno-non-template-friend -ftemplate-depth-30";;
      2.96*)  AM_CXXFLAGS="-fno-exceptions -ftemplate-depth-30 -Wno-non-template-friend";;
      3.1*)    AM_CXXFLAGS="-finline-limit=500 -fno-exceptions";;
      3.2*|3.3*)    AM_CXXFLAGS="-fno-exceptions";;
      3.4*|4.0*)
          AM_CXXFLAGS="-fno-exceptions"
          test $enable_pch = yes && lyx_pch_comp=yes
          ;;
      *)       AM_CXXFLAGS="";;
  esac
  if test x$enable_stdlib_debug = xyes ; then
    case $gxx_version in
      3.4*|4.0*)
        lyx_flags="stdlib-debug $lyx_flags"
	AC_DEFINE(_GLIBCXX_DEBUG, 1, [libstdc++ debug mode])
	AC_DEFINE(_GLIBCXX_DEBUG_PEDANTIC, 1, [libstdc++ pedantic debug mode])
        ;;
    esac
  fi
  if test x$enable_concept_checks = xyes ; then
    case $gxx_version in
      3.3*)
        lyx_flags="concept-checks $lyx_flags"
        AC_DEFINE(_GLIBCPP_CONCEPT_CHECKS, 1, [libstdc++ concept checking])
	;;
      3.4*|4.0*)
        lyx_flags="concept-checks $lyx_flags"
	AC_DEFINE(_GLIBCXX_CONCEPT_CHECKS, 1, [libstdc++ concept checking])
	;;
    esac
  fi
fi
test "$lyx_pch_comp" = yes && lyx_flags="pch $lyx_flags"
AM_CONDITIONAL(LYX_BUILD_PCH, test "$lyx_pch_comp" = yes)
])dnl


dnl NOT USED CURRENTLY*************************************
dnl Usage: LYX_CXX_RTTI : checks whether the C++ compiler
dnl   supports RTTI
AC_DEFUN([LYX_CXX_RTTI],[
### Check whether the compiler supports runtime type information
AC_CACHE_CHECK(whether the C++ compiler supports RTTI,lyx_cv_rtti,
 [AC_TRY_RUN([
class rtti {
public:
   virtual int tag() { return 0; }
};
class derived1 : public rtti {
public:
    int tag() { return 1; }
};
class derived2 : public rtti {
public:
    int tag() { return 2; }
};
int main() {
    derived1 * foo1 = new derived1();
    derived2 * foo2 = new derived2();
    rtti * bar = foo1;
    derived1 * bar1 = dynamic_cast<derived1 *>(bar);
    if (bar1 == 0)
	exit(1);
    bar = foo2;
    bar1 = dynamic_cast<derived1 *>(bar);
    if (bar1 != 0)
	exit(1);
    return 0;
}
],lyx_cv_rtti=yes,lyx_cv_rtti=no,lyx_cv_rtti=no)
])
if test x$lyx_cv_rtti = xyes ; then
  AC_DEFINE(HAVE_RTTI, 1,
   [Define to 1 if your compiler supports runtime type information])
fi])


dnl Usage: LYX_CXX_EXPLICIT : checks whether the C++ compiler
dnl   understands the "explicit" directive.
AC_DEFUN([LYX_CXX_EXPLICIT],[
### Check whether the compiler understands the keyword `explicit'
AC_CACHE_CHECK(whether the C++ compiler understands explicit,lyx_cv_explicit,
 [AC_TRY_COMPILE([
class Expl {
public:
	explicit Expl() {}
};],,lyx_cv_explicit=yes,lyx_cv_explicit=no)
])
if test $lyx_cv_explicit = no ; then
  AC_DEFINE(explicit,[ ],
   [Define to nothing if your compiler does not understand the
   'explicit' directive])
fi])


dnl NOT USED CURRENTLY*************************************
dnl Usage: LYX_CXX_STL_STACK : checks whether the C++ compiler
dnl   has a working stl stack template
AC_DEFUN([LYX_CXX_STL_STACK],[
AC_CACHE_CHECK(for broken STL stack template,lyx_cv_broken_stack,
 [AC_TRY_COMPILE([
#include <stack>
using std::stack;
],[
    stack<int> stakk;
    stakk.push(0);
],lyx_cv_broken_stack=no,lyx_cv_broken_stack=yes)
])
if test $lyx_cv_broken_stack = yes ; then
  AC_DEFINE(BROKEN_STL_STACK, 1,
   [Define if you have the STL from libg++ 2.7.x, where stack<> is not defined
   correctly])
fi])


dnl Usage: LYX_STD_COUNT : checks wherer the C++ library have a conforming
dnl    count template, if not the old HP version is assumed.
AC_DEFUN([LYX_STD_COUNT],[
AC_CACHE_CHECK(for conforming std::count,lyx_cv_std_count,
 [AC_TRY_COMPILE([
#include <algorithm>
using std::count;
int countChar(char * b, char * e, char const c)
{
	return count(b, e, c);
}
],[
    char a[] = "hello";
    int i = countChar(a, a + 5, 'l');
],lyx_cv_std_count=yes,lyx_cv_std_count=no)
])
if test $lyx_cv_std_count = yes ; then
    AC_DEFINE(HAVE_STD_COUNT, 1,
    [Define if you have a conforming std::count template, otherwise HP version of count template is assumed.])
fi])


dnl Usage: LYX_CXX_STL_MODERN_STREAMS : checks whether the C++ compiler
dnl   supports modern STL streams
AC_DEFUN([LYX_CXX_STL_MODERN_STREAMS],[
AC_CACHE_CHECK(for modern STL streams,lyx_cv_modern_streams,
 [AC_TRY_COMPILE([
#include <iostream>
],[
 std::streambuf * test = std::cerr.rdbuf();
 test->pubsync();
],lyx_cv_modern_streams=yes,lyx_cv_modern_streams=no)
])
if test $lyx_cv_modern_streams = yes ; then
  AC_DEFINE(MODERN_STL_STREAMS, 1,
   [Define if you have modern standard-compliant STL streams])
fi])


dnl Usage: LYX_USE_INCLUDED_BOOST : select if the included boost should
dnl        be used.
AC_DEFUN([LYX_USE_INCLUDED_BOOST],[
	AC_ARG_WITH(included-boost,
	    [  --with-included-boost  use the boost lib supplied with LyX],
	    [lyx_cv_with_included_boost=$withval
		AC_MSG_RESULT([$with_included_boost])],
	    [lyx_cv_with_included_boost=yes])
	AM_CONDITIONAL(USE_INCLUDED_BOOST, test x$lyx_cv_with_included_boost = xyes)
])


dnl NOT USED CURRENTLY*************************************
dnl LYX_CXX_PARTIAL
AC_DEFUN([LYX_CXX_PARTIAL], [
    AC_REQUIRE([AC_PROG_CXX])
    AC_CACHE_CHECK([if C++ compiler supports partial specialization],
	[lyx_cv_cxx_partial_specialization],
	[AC_TRY_COMPILE(
	    [
	    template<class T, class K>
	    class k {
	    public:
	    };
	    template<class T> class k<void,T> { };
	    ],[
	    k<float, float> b;
	    k<void,void> a;
	    ],[
	    lyx_cv_cxx_partial_specialization=yes
	    ],[
	    lyx_cv_cxx_partial_specialization=no
	    ])
	])
    if test x$lyx_cv_cxx_partial_specialization = xyes ; then
	AC_DEFINE(HAVE_PARTIAL_SPECIALIZATION, 1,
	[Defined if your compiler supports partial specialization.])
    fi
])


dnl Usage: LYX_CXX_GLOBAL_CSTD: checks whether C library functions
dnl   are already in the global namespace
AC_DEFUN([LYX_CXX_GLOBAL_CSTD],[
    AC_CACHE_CHECK(whether C library functions are already in the global namespace,
    lyx_cv_cxx_global_cstd,
    [AC_TRY_COMPILE([
    #include <cctype>
    using std::tolower;
    ],[
    return 0;
    ],[lyx_cv_cxx_global_cstd=no],[lyx_cv_cxx_global_cstd=yes])])
    if test x$lyx_cv_cxx_global_cstd = xyes; then
	AC_DEFINE(CXX_GLOBAL_CSTD,1,
	[Define if your C++ compiler puts C library functions in the global namespace])
    fi
])


dnl Usage: LYX_WITH_DIR(dir-name,desc,dir-var-name,default-value,
dnl                       [default-yes-value])
dnl  Adds a --with-'dir-name' option (described by 'desc') and puts the
dnl  resulting directory name in 'dir-var-name'.
AC_DEFUN([LYX_WITH_DIR],[
  AC_ARG_WITH($1,[  --with-$1        specify $2])
  AC_MSG_CHECKING([for $2])
  if test -z "$with_$3"; then
     AC_CACHE_VAL(lyx_cv_$3, lyx_cv_$3=$4)
  else
    test "x$with_$3" = xyes && with_$3=$5
    lyx_cv_$3="$with_$3"
  fi
  AC_MSG_RESULT($lyx_cv_$3)])


dnl Usage: LYX_LOOP_DIR(value,action)
dnl Executes action for values of variable `dir' in `values'. `values' can
dnl use ":" as a separator.
AC_DEFUN([LYX_LOOP_DIR],[
IFS="${IFS=	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
for dir in `eval "echo $1"`; do
  if test ! "$dir" = NONE; then
    test ! -d "$dir" && AC_MSG_ERROR([\"$dir\" is not a directory])
    $2
  fi
done
IFS=$ac_save_ifs
])


dnl Usage: LYX_ADD_LIB_DIR(var-name,dir) Adds a -L directive to variable
dnl var-name.
AC_DEFUN([LYX_ADD_LIB_DIR],[
$1="${$1} -L$2"
if test "`(uname) 2>/dev/null`" = SunOS &&
    uname -r | grep '^5' >/dev/null; then
  if test $ac_cv_prog_gxx = yes ; then
    $1="${$1} -Wl[,]-R$2"
  else
    $1="${$1} -R$2"
  fi
fi])


dnl Usage: LYX_ADD_INC_DIR(var-name,dir) Adds a -I directive to variable
dnl var-name.
AC_DEFUN([LYX_ADD_INC_DIR],[$1="${$1} -I$2 "])

### Check for a headers existence and location iff it exists
## This is supposed to be a generalised version of LYX_STL_STRING_FWD
## It almost works.  I've tried a few variations but they give errors
## of one sort or other: bad substitution or file not found etc.  The
## actual header _is_ found though and the cache variable is set however
## the reported setting (on screen) is equal to $ac_safe for some unknown
## reason.
## Additionally, autoheader can't figure out what to use as the name in
## the config.h.in file so we need to write our own entries there -- one for
## each header in the form PATH_HEADER_NAME_H
##
AC_DEFUN([LYX_PATH_HEADER],
[ AC_CHECK_HEADER($1,[
  ac_tr_safe=PATH_`echo $ac_safe | sed 'y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%'`
### the only remaining problem is getting the second parameter to this
### AC_CACHE_CACHE to print correctly. Currently it just results in value
### of $ac_safe being printed.
  AC_CACHE_CHECK([path to $1],[lyx_cv_path2_$ac_safe],
  [ cat > conftest.$ac_ext <<EOF
#line __oline__ "configure"
#include "confdefs.h"

#include <$1>
EOF
lyx_path_header_path=`(eval "$ac_cpp conftest.$ac_ext") 2>&5 | \
  grep $1  2>/dev/null | \
  sed -e 's/.*\(".*$1"\).*/\1/' -e "1q"`
eval "lyx_cv_path2_${ac_safe}=\$lyx_path_header_path"
rm -f conftest*])
  AC_DEFINE_UNQUOTED($ac_tr_safe, $lyx_path_header_path, [dummy])])
])
### end of LYX_PATH_HEADER

### Check which frontends we want to use. The default is XForms only
###
AC_DEFUN([LYX_USE_FRONTENDS],
[AC_MSG_CHECKING([what frontend should be used for the GUI])
AC_ARG_WITH(frontend,
  [  --with-frontend=THIS    Use THIS frontend as main GUI:
			    Possible values: xforms, qt, gtk(EXPERIMENTAL)],
  [FRONTENDS="$withval"], [FRONTENDS="xforms"])
AC_MSG_RESULT($FRONTENDS)
AC_SUBST(FRONTENDS)
AC_SUBST(FRONTENDS_SUBDIRS)
AC_SUBST(FRONTENDS_PROGS)
])


## Check what kind of packaging should be used at install time. 
## The default is autodetected. 
AC_DEFUN([LYX_USE_PACKAGING],
[AC_MSG_CHECKING([what packaging should be used])
AC_ARG_WITH(packaging,
  [  --with-packaging=THIS   Use THIS packaging for installation:
			    Possible values: posix, windows, macosx],
  [lyx_use_packaging="$withval"], [
  case $host in
    *-apple-darwin*) lyx_use_packaging=macosx ;;
     *-pc-mingw32*) lyx_use_packaging=windows;;
                  *) lyx_use_packaging=posix;;
  esac])
AC_MSG_RESULT($lyx_use_packaging)
case $lyx_use_packaging in 
   macosx) AC_DEFINE(USE_MACOSX_PACKAGING, 1, [Define to 1 if LyX should use a MacOS X application bundle file layout]) 
           default_prefix="/Applications/LyX.app"
	   bindir='${prefix}/Contents/MacOS'
	   libdir='${prefix}/Contents/Resources'
	   datadir='${prefix}/Contents/Resources'
	   mandir='${prefix}/Contents/Resources/man' ;;
  windows) AC_DEFINE(USE_WINDOWS_PACKAGING, 1, [Define to 1 if LyX should use a Windows-style file layout]) 
           default_prefix="C:/Program Files/LyX"
	   bindir='${prefix}/bin'
	   libdir='${prefix}/Resources'
	   datadir='${prefix}/Resources'
	   mandir='${prefix}/Resources/man' ;;
    posix) AC_DEFINE(USE_POSIX_PACKAGING, 1, [Define to 1 if LyX should use a POSIX-style file layout]) 
	   default_prefix=$ac_default_prefix ;;
    *) LYX_ERROR([Unknown packaging type $lyx_use_packaging]) ;;
esac
])


## ------------------------------------------------------------------------
## Find a file (or one of more files in a list of dirs)
## ------------------------------------------------------------------------
##
AC_DEFUN([AC_FIND_FILE],
[
$3=NO
for i in $2;
do
  for j in $1;
  do
    if test -r "$i/$j"; then
      $3=$i
      break 2
    fi
  done
done
])

dnl just a wrapper to clean up configure.in
AC_DEFUN([LYX_PROG_LIBTOOL],
[
AC_REQUIRE([AC_ENABLE_SHARED])
AC_REQUIRE([AC_ENABLE_STATIC])
dnl libtool is only for C, so I must force him
dnl to find the correct flags for C++
ac_save_cc=$CC
ac_save_cflags="$CFLAGS"
CC=$CXX
CFLAGS="$CXXFLAGS"
AM_PROG_LIBTOOL dnl for libraries
CC=$ac_save_cc
CFLAGS="$ac_save_cflags"
])


## ------------------------------------------------------------------------
## Check whether mkdir() is mkdir or _mkdir, and whether it takes
## one or two arguments.
##
## http://ac-archive.sourceforge.net/C_Support/ac_func_mkdir.html
## ------------------------------------------------------------------------
##
AC_DEFUN([AC_FUNC_MKDIR],
[AC_CHECK_FUNCS([mkdir _mkdir])
AC_CACHE_CHECK([whether mkdir takes one argument],
               [ac_cv_mkdir_takes_one_arg],
[AC_TRY_COMPILE([
#include <sys/stat.h>
#if HAVE_UNISTD_H
#  include <unistd.h>
#endif
], [mkdir (".");],
[ac_cv_mkdir_takes_one_arg=yes], [ac_cv_mkdir_takes_one_arg=no])])
if test x"$ac_cv_mkdir_takes_one_arg" = xyes; then
  AC_DEFINE([MKDIR_TAKES_ONE_ARG], 1,
            [Define if mkdir takes only one argument.])
fi
])