dnl Process this file with autoconf to produce a configure script.
dnl Copyright 1998-2013 Glyph & Cog, LLC

AC_PREREQ(2.57)

AC_INIT(xpdf/Gfx.cc)
AC_CONFIG_HEADER(aconf.h)

dnl ##### Optional features.

AC_ARG_ENABLE([a4-paper],
  AS_HELP_STRING([--enable-a4-paper],
                 [use A4 paper size instead of Letter for PostScript output]))
AS_IF([test "x$enable_a4_paper" = "xyes"],
      [AC_DEFINE(A4_PAPER)])

AC_ARG_ENABLE([no-text-select],
  AS_HELP_STRING([--enable-no-text-select],
                 [do not allow text selection]))
AS_IF([test "x$enable_no_text_select" = "xyes"],
      [AC_DEFINE(NO_TEXT_SELECT)])

AC_ARG_ENABLE([opi],
  AS_HELP_STRING([--enable-opi],
                 [include support for OPI comments]))
AS_IF([test "x$enable_opi" = "xyes"],
      [AC_DEFINE(OPI_SUPPORT)])

AC_ARG_ENABLE([multithreaded],
  AS_HELP_STRING([--enable-multithreaded],
                 [include support for multithreading]))
AS_IF([test "x$enable_multithreaded" = "xyes"],
      [AC_DEFINE(MULTITHREADED)])

AC_ARG_ENABLE([exceptions],
  AS_HELP_STRING([--enable-exceptions],
                 [use C++ exceptions]))
AS_IF([test "x$enable_exceptions" = "xyes"],
      [AC_DEFINE(USE_EXCEPTIONS)])

AC_ARG_ENABLE([fixedpoint],
  AS_HELP_STRING([--enable-fixedpoint],
                 [use fixed point (instead of floating point) arithmetic]))
AS_IF([test "x$enable_fixedpoint" = "xyes"],
      [AC_DEFINE(USE_FIXEDPOINT)])

AC_ARG_ENABLE([cmyk],
  AS_HELP_STRING([--enable-cmyk],
                 [include support for CMYK rasterization]))
AS_IF([test "x$enable_cmyk" = "xyes"],
      [AC_DEFINE(SPLASH_CMYK)])

AC_ARG_WITH([appdef-dir],
  AS_HELP_STRING([--with-appdef-dir],
                 [set app-defaults directory]))
AS_IF([test "x$with_appdef_dir" != "xno"],
      [AC_DEFINE_UNQUOTED(APPDEFDIR, "$with_appdef_dir")])

dnl ##### Path to xpdfrc.
dnl This ugly kludge to get the sysconfdir path is needed because
dnl autoconf doesn't actually set the prefix variable until later.
if test "$sysconfdir" = '${prefix}/etc'; then
  if test "x$prefix" = xNONE; then
    system_xpdfrc="$ac_default_prefix/etc/xpdfrc"
  else
    system_xpdfrc="$prefix/etc/xpdfrc"
  fi
else
  system_xpdfrc="$sysconfdir/xpdfrc"
fi
AC_DEFINE_UNQUOTED(SYSTEM_XPDFRC, "$system_xpdfrc")

dnl ##### Checks for programs.
AC_PROG_CC
AC_ISC_POSIX
AC_PROG_CC_STDC
#if test -z "$CXX" -a "$CC" = "gcc"; then
#  CXX="gcc"
#fi
AC_PROG_CXX
AC_PROG_INSTALL
AC_PROG_RANLIB

dnl ##### Default values for Unix.
EXE=""
LIBPREFIX="lib"
AR="ar rc"
UP_DIR=""

dnl ##### Check for OS/2.
AC_CACHE_CHECK([for OS/2 (with EMX)],
xpdf_cv_sys_os2,
[AC_TRY_COMPILE([],
[__EMX__],
xpdf_cv_sys_os2=yes, xpdf_cv_sys_os2=no)])
if test "$xpdf_cv_sys_os2" = yes; then
  EXE=".exe"
  LIBPREFIX=""
  AR="ar -rc"
fi

dnl ##### Check for DOS (with DJGPP).
AC_CACHE_CHECK([for DOS (with DJGPP)],
xpdf_cv_sys_dos,
[AC_TRY_COMPILE([],
[__DJGPP__],
xpdf_cv_sys_dos=yes, xpdf_cv_sys_dos=no)])
if test "$xpdf_cv_sys_dos" = yes; then
  EXE=".exe"
  LIBPREFIX="lib"
  AR="ar -rc"
  UP_DIR="../"
fi

dnl ##### Do substitutions.
AC_SUBST(EXE)
AC_SUBST(LIBPREFIX)
AC_SUBST(AR)
AC_SUBST(UP_DIR)

dnl ##### Checks for header files.
AC_PATH_XTRA
AC_HEADER_DIRENT

dnl ##### Switch over to C++.  This will make the checks below a little
dnl ##### bit stricter (requiring function prototypes in include files).
dnl ##### (99% of xpdf is written in C++.)
AC_LANG_CPLUSPLUS

dnl ##### Check for extra libraries needed by X.  (LynxOS needs this.)
AC_CHECK_FUNC(gethostbyname)
if test $ac_cv_func_gethostbyname = no; then
  AC_CHECK_LIB(bsd, gethostbyname, X_EXTRA_LIBS="$X_EXTRA_LIBS -lbsd")
fi

dnl ##### Look for header that defines select() and fd_set.
AC_MSG_CHECKING([select() and fd_set in sys/select.h and sys/bsdtypes.h])
AC_TRY_COMPILE([#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <sys/types.h>],
  [fd_set fds;
select(0, NULL, NULL, NULL, NULL);], xpdf_ok=yes, xpdf_ok=no)
if test $xpdf_ok = yes; then
  AC_MSG_RESULT([not needed])
else
  AC_TRY_COMPILE([#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/select.h>],
    [fd_set fds;
select(0, NULL, NULL, NULL, NULL);], xpdf_ok=yes, xpdf_ok=no)
  if test $xpdf_ok = yes; then
    AC_DEFINE(HAVE_SYS_SELECT_H)
    AC_MSG_RESULT([need sys/select.h])
  else
    AC_TRY_COMPILE([#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/bsdtypes.h>],
      [fd_set fds;
select(0, NULL, NULL, NULL, NULL);], xpdf_ok=yes, xpdf_ok=no)
    if test $xpdf_ok = yes; then
      AC_DEFINE(HAVE_SYS_BSDTYPES_H)
      AC_MSG_RESULT([need sys/bsdtypes.h])
    else
      AC_MSG_RESULT([problem])
    fi
  fi
fi

dnl ##### Look for header that defines FD_ZERO.
AC_MSG_CHECKING([FD_ZERO and strings.h or bstring.h])
AC_TRY_COMPILE([#include <stdlib.h>
#include <sys/types.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif],
[fd_set fds; FD_ZERO(&fds);], xpdf_ok=yes, xpdf_ok=no)
if test $xpdf_ok = yes; then
  AC_MSG_RESULT([not needed])
else
  AC_TRY_COMPILE([#include <stdlib.h>
#include <sys/types.h>
#include <strings.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif],
    [fd_set fds; FD_ZERO(&fds);], xpdf_ok=yes, xpdf_ok=no)
  if test $xpdf_ok = yes; then
    AC_DEFINE(HAVE_STRINGS_H)
    AC_MSG_RESULT([need strings.h])
  else
    AC_TRY_COMPILE([#include <stdlib.h>
#include <sys/types.h>
#include <bstring.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif],
      [fd_set fds; FD_ZERO(&fds);], xpdf_ok=yes, xpdf_ok=no)
    if test $xpdf_ok = yes; then
      AC_DEFINE(HAVE_BSTRING_H)
      AC_MSG_RESULT([need bstring.h])
    else
      AC_MSG_RESULT([problem])
    fi
  fi
fi

dnl ##### Look for rewinddir.
AC_CHECK_FUNCS(rewinddir)
if test $ac_cv_func_rewinddir = no; then
  AC_CHECK_LIB(cposix, rewinddir)
fi

dnl ##### Checks for library functions.
AC_CHECK_FUNCS(popen)
dnl # This should use 'AC_CHECK_FUNCS(mkstemp)' but that fails if
dnl # the mkstemp exists in the library but isn't declared in the
dnl # include file (e.g., in cygwin 1.1.2).
AC_CACHE_CHECK([for mkstemp],
xpdf_cv_func_mkstemp,
[AC_TRY_LINK([#include <stdlib.h>
#include <unistd.h>],
[mkstemp("foo");],
xpdf_cv_func_mkstemp=yes, xpdf_cv_func_mkstemp=no)])
if test "$xpdf_cv_func_mkstemp" = yes; then
  AC_DEFINE(HAVE_MKSTEMP)
fi
dnl # Check for mkstemps, just like mkstemp.
AC_CACHE_CHECK([for mkstemps],
xpdf_cv_func_mkstemps,
[AC_TRY_LINK([#include <stdlib.h>
#include <unistd.h>],
[mkstemps("foo", 0);],
xpdf_cv_func_mkstemps=yes, xpdf_cv_func_mkstemps=no)])
if test "$xpdf_cv_func_mkstemps" = yes; then
  AC_DEFINE(HAVE_MKSTEMPS)
fi

dnl ##### Check select argument type: on HP-UX before version 10, select
dnl ##### takes (int *) instead of (fd_set *).
AC_CACHE_CHECK([whether select takes fd_set arguments],
xpdf_cv_func_select_arg,
[AC_TRY_COMPILE([#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif],
[fd_set fds;
select(1, &fds, &fds, &fds, 0);],
xpdf_cv_func_select_arg=yes, xpdf_cv_func_select_arg=no)])
if test "$xpdf_cv_func_select_arg" != yes; then
  AC_DEFINE(SELECT_TAKES_INT)
fi

dnl ##### Check for std::sort.
AC_CACHE_CHECK([for std::sort],
xpdf_cv_func_std_sort,
[AC_COMPILE_IFELSE(
  [AC_LANG_PROGRAM([[#include <algorithm>
struct functor {
  bool operator()(const int &i0, const int &i1) { return i0 < i1; }
};]],
                  [[int a[100];
std::sort(a, a+100, functor());]])],
xpdf_cv_func_std_sort=yes, xpdf_cv_func_std_sort=no)])
if test "$xpdf_cv_func_std_sort" = yes; then
  AC_DEFINE(HAVE_STD_SORT)
fi

dnl ##### Back to C for the library tests.
AC_LANG_C

dnl ##### Check for fseeko/ftello or fseek64/ftell64
dnl The LARGEFILE and FSEEKO macros have to be called in C, not C++, mode.
AC_SYS_LARGEFILE
AC_FUNC_FSEEKO
AC_CHECK_FUNCS(fseek64, xpdf_cv_func_fseek64=yes, xpdf_cv_func_fseek64=no)
AC_CHECK_FUNCS(ftell64, xpdf_cv_func_ftell64=yes, xpdf_cv_func_ftell64=no)
if test "$xpdf_cv_func_fseek64" = yes -a "$xpdf_cv_func_ftell64" = yes; then
  AC_DEFINE(HAVE_FSEEK64)
fi

dnl ##### Check for libXpm.
if test -z "$no_x"; then
  smr_CHECK_LIB(Xpm, Xpm, [pixmap library - used only for icon], 
                XpmCreatePixmapFromData, X11/xpm.h,
                $X_LIBS $X_PRE_LIBS $X_EXTRA_LIBS -lX11, $X_CFLAGS)
  AC_SUBST(Xpm_LIBS)
  AC_SUBST(Xpm_CFLAGS)
fi

dnl ##### Check for Motif (libXm).
if test -z "$no_x"; then
  dnl # XextAddDisplay isn't defined in any header file, so we provide a
  dnl # bogus prototype (so the compiler doesn't complain) and a bogus
  dnl # header file (so the smr macro doesn't break).
  smr_CHECK_LIB(Xext, Xext, [Motif library], 
                XextAddDisplay, X11/Xlib.h,
                $X_LIBS $X_PRE_LIBS $X_EXTRA_LIBS -lX11, $X_CFLAGS,
                [int XextAddDisplay();])
  AC_SUBST(Xext_LIBS)
  AC_SUBST(Xext_CFLAGS)
  smr_CHECK_LIB(Xp, Xp, [Motif library], 
                XpStartPage, X11/extensions/Print.h,
                $X_LIBS $X_PRE_LIBS $Xext_LIBS $X_EXTRA_LIBS -lX11, $X_CFLAGS)
  AC_SUBST(Xp_LIBS)
  AC_SUBST(Xp_CFLAGS)
  smr_CHECK_LIB(Xt, Xt, [Motif library], 
                XtAppInitialize, X11/Intrinsic.h,
                $X_LIBS $X_PRE_LIBS $X_EXTRA_LIBS -lX11, $X_CFLAGS)
  AC_SUBST(Xt_LIBS)
  AC_SUBST(Xt_CFLAGS)
  smr_CHECK_LIB(Xm, Xm, [Motif library], 
                XmCreateForm, Xm/XmAll.h,
                $Xt_LIBS $X_LIBS $X_PRE_LIBS $Xp_LIBS $Xext_LIBS $X_EXTRA_LIBS -lX11, $X_CFLAGS)
  AC_SUBST(Xm_LIBS)
  AC_SUBST(Xm_CFLAGS)
  smr_CHECK_LIB(Sgm, Sgm, [SGI Motif library],
                SgCreateHorzPanedWindow, Sgm/HPanedW.h,
                $Xm_LIBS $Xt_LIBS $X_LIBS $X_PRE_LIBS $Xp_LIBS $Xext_LIBS $X_EXTRA_LIBS -lX11, $X_CFLAGS)
  AC_SUBST(Sgm_LIBS)
  AC_SUBST(Sgm_CFLAGS)

  dnl # check for XtAppSetExitFlag, which didn't exist prior to X11R6 (?)
  if test "x$smr_have_Xt_library" = xyes; then
    AC_CHECK_LIB(Xt, XtAppSetExitFlag,
		 AC_DEFINE(HAVE_XTAPPSETEXITFLAG), ,
                 [$Xt_LIBS $X_LIBS $X_PRE_LIBS $Xp_LIBS $Xext_LIBS $X_EXTRA_LIBS -lX11])
  fi
fi

dnl ##### Check for FreeType 2.x.
dnl ##### (Note: FT_Get_Name_Index was added in FT 2.0.5, and is
dnl ##### the reason that Xpdf requires 2.0.5+.)
smr_CHECK_LIB(freetype2, freetype, [FreeType2 font rasterizer - version 2.0.5+],
              FT_Get_Name_Index, ft2build.h, -lm)
AC_SUBST(freetype2_LIBS)
AC_SUBST(freetype2_CFLAGS)
if test "x$smr_have_freetype2_library" = xyes; then
  AC_DEFINE(HAVE_FREETYPE_FREETYPE_H)
  AC_DEFINE(HAVE_SPLASH)
fi

dnl ##### Check for libpng.
smr_CHECK_LIB(libpng, png, [PNG library], png_write_row, png.h, -lz)
AC_SUBST(libpng_LIBS)
AC_SUBST(libpng_CFLAGS)

dnl ##### Check for libpaper (Debian).
smr_CHECK_LIB(libpaper, paper, [Debian libpaper], paperinit, paper.h)
AC_SUBST(libpaper_LIBS)
AC_SUBST(libpaper_CFLAGS)

dnl ##### Disable X-specific stuff in top-level Makefile.
if test -n "$no_x" -o "x$smr_have_Xm_library" != xyes -o "x$smr_have_freetype2_library" != xyes; then
  X="#"
  XPDF_TARGET="all-no-x"
else
  X=""
  XPDF_TARGET="all"
fi
AC_SUBST(X)
AC_SUBST(XPDF_TARGET)

dnl ##### Extra libraries.
EXTRA_LIBS=
EXTRA_CFLAGS=
AC_SUBST(EXTRA_LIBS)
AC_SUBST(EXTRA_CFLAGS)

dnl ##### Write the makefiles.
AC_OUTPUT(Makefile goo/Makefile fofi/Makefile splash/Makefile xpdf/Makefile)

dnl ##### Warn user if X is missing.
if test -n "$no_x" -o "x$smr_have_Xm_library" != xyes -o "x$smr_have_freetype2_library" != xyes; then
  if test -n "$no_x"; then
    AC_MSG_WARN([Couldn't find X]);
  fi
  if test "x$smr_have_Xm_library" != xyes; then
    AC_MSG_WARN([Couldn't find Motif]);
  fi
  if test "x$smr_have_freetype2_library" != xyes; then
    AC_MSG_WARN([Couldn't find FreeType]);
  fi
  AC_MSG_WARN([-- You will be able to compile pdftops, pdftotext,
        pdfinfo, pdffonts, pdfdetach, and pdfimages, but not xpdf
        or pdftoppm])
fi

dnl ##### Warn user if libpng is missing.
if test "x$smr_have_libpng_library" != xyes; then
  AC_MSG_WARN([Couldn't find libpng -- you will not be able to build pdftohtml or pdftopng])
fi