configure.in

按照官方的说法：Cairo is a vector graphics library with cross-device output support. 翻译过来

        fi
      fi
    fi
  fi
  ft_CFLAGS="$FREETYPE_CFLAGS $FONTCONFIG_CFLAGS"
  ft_LIBS="$FREETYPE_LIBS $FONTCONFIG_LIBS"
])

have_ft_load_sfnt_table=no

if test "x$use_ft" = "xyes"; then
  FREETYPE_CONFIG_CFLAGS=$cairo_cv_ft_config_CFLAGS
  FREETYPE_CONFIG_LIBS=$cairo_cv_ft_config_LIBS
  AC_SUBST(FREETYPE_CONFIG_CFLAGS)
  AC_SUBST(FREETYPE_CONFIG_LIBS)

  temp_save_libs="$LIBS"
  temp_save_cflags="$CFLAGS"
  LIBS="$LIBS $ft_LIBS"
  CFLAGS="$CFLAGS $ft_CFLAGS"
  AC_CHECK_MEMBER(FT_Bitmap_Size.y_ppem,
                  HAVE_FT_BITMAP_SIZE_Y_PPEM=1,
                  HAVE_FT_BITMAP_SIZE_Y_PPEM=0,
                  [#include <ft2build.h>
                   #include FT_FREETYPE_H])
  AC_DEFINE_UNQUOTED(HAVE_FT_BITMAP_SIZE_Y_PPEM,$HAVE_FT_BITMAP_SIZE_Y_PPEM,
                     [FT_Bitmap_Size structure includes y_ppem field])

  AC_CHECK_FUNC(FT_Load_Sfnt_Table, have_ft_load_sfnt_table=yes)
  AC_CHECK_FUNCS(FT_GlyphSlot_Embolden)

  LIBS="$temp_save_libs"
  CFLAGS="$temp_save_cflags"
fi

dnl ===========================================================================

AC_CHECK_HEADERS([pthread.h], have_pthread=yes, have_pthread=no)
AM_CONDITIONAL(HAVE_PTHREAD, test "x$have_pthread" = "xyes")

dnl ===========================================================================

CAIRO_BACKEND_ENABLE(ps, PostScript, ps, PS_SURFACE, auto, [], [
  if test x"$have_ft_load_sfnt_table" != "xyes" ; then
    use_ps="no (requires FreeType 2.1.4 or newer)"
  else
    # The postscript module requires zlib.
    AC_CHECK_LIB(z, compress,
                 [AC_CHECK_HEADER(zlib.h, [],
		 [use_ps="no (requires zlib http://www.gzip.org/zlib/)"])],
		 [use_ps="no (requires zlib http://www.gzip.org/zlib/)"])
    ps_LIBS=-lz
  fi
])

dnl ===========================================================================

CAIRO_BACKEND_ENABLE(pdf, PDF, pdf, PDF_SURFACE, auto, [], [
  if test x"$have_ft_load_sfnt_table" != "xyes" ; then
    use_pdf="no (requires FreeType 2.1.4 or newer)"
  fi
  pdf_LIBS=-lz
])

test_pdf=no
if test "x$use_pdf" = "xyes"; then
  PKG_CHECK_MODULES(POPPLER, poppler-glib >= 0.4.1 pango gtk+-2.0, [test_pdf=yes], [test_pdf=no])
  if test "x$test_pdf" = "xyes"; then
    AC_DEFINE([CAIRO_CAN_TEST_PDF_SURFACE], 1, [Define to 1 if the PDF backend can be tested (need poppler and other dependencies for pdf2png)])
  else
    AC_MSG_WARN([PDF backend will not be tested since poppler is not available])
  fi
fi

AM_CONDITIONAL(CAIRO_CAN_TEST_PDF_SURFACE, test "x$test_pdf" = "xyes")
AC_SUBST(POPPLER_CFLAGS)
AC_SUBST(POPPLER_LIBS)

AM_CONDITIONAL(CAIRO_HAS_MULTI_PAGE_SURFACES, test "x$use_ps" = "xyes" -o "x$use_pdf" = "xyes")

dnl ===========================================================================

CAIRO_BACKEND_ENABLE(svg, SVG, svg, SVG_SURFACE, auto, [], [
  if test x"$have_ft_load_sfnt_table" != "xyes" ; then
    use_svg="no (requires FreeType 2.1.4 or newer)"
  fi
])

if test "x$use_svg" = "xyes"; then
  PKG_CHECK_MODULES(LIBRSVG, librsvg-2.0 gdk-2.0, [test_svg=yes], [test_svg=no])
  if test "x$test_svg" = "xyes"; then
    AC_DEFINE([CAIRO_CAN_TEST_SVG_SURFACE], 1, [Define to 1 if the SVG backend can be tested (need librsvg)])
  else
    AC_MSG_WARN([SVG backend will not be tested since a librsvg is not available])
  fi
fi

AM_CONDITIONAL(CAIRO_CAN_TEST_SVG_SURFACE, test "x$test_svg" = "xyes")
AC_SUBST(LIBRSVG_CFLAGS)
AC_SUBST(LIBRSVG_LIBS)

dnl ===========================================================================

dnl This check should default to 'auto' once we have code to actually
dnl check for the atsui font backend.

CAIRO_BACKEND_ENABLE(atsui, ATSUI font, atsui, ATSUI_FONT, no, [
  dnl There is no pkgconfig for atsui; lets do a header check
  AC_CHECK_HEADER(Carbon/Carbon.h, , [use_atsui="no (Carbon not found)"])
])

dnl ===========================================================================
dnl Checks for precise integer types
AC_CHECK_HEADERS([stdint.h inttypes.h sys/int_types.h])
AC_CHECK_TYPES([uint64_t, uint128_t])

dnl Use lots of warning flags with GCC

WARN_CFLAGS=""

if test "x$GCC" = "xyes"; then
	WARN_CFLAGS="-Wall -Wpointer-arith -Wstrict-prototypes \
	-Wmissing-prototypes -Wmissing-declarations \
	-Wnested-externs -fno-strict-aliasing"
fi

AC_SUBST(WARN_CFLAGS)

CAIRO_CFLAGS="$CAIRO_CFLAGS $WARN_CFLAGS"

AC_SUBST(CAIRO_REQUIRES)
AC_SUBST(CAIRO_CFLAGS)
AC_SUBST(CAIRO_LIBS)

dnl ===========================================================================
dnl Check for gtk-doc and docbook

GTK_DOC_CHECK([1.6])

dnl ===========================================================================
dnl Check for recent pkg-config which supports Requires.private

case `$PKG_CONFIG --version` in
[0.?|0.?.?|0.1[0-7]|0.1[0-7].?]) PKGCONFIG_REQUIRES="Requires"; ;;
*) PKGCONFIG_REQUIRES="Requires.private"; ;;
esac

AC_SUBST(PKGCONFIG_REQUIRES)

dnl ===========================================================================
dnl Check for MMX

MMX_CFLAGS="-mmmx -Winline --param inline-unit-growth=10000 --param large-function-growth=10000"

have_mmx_intrinsics=no
AC_MSG_CHECKING(for MMX/SSE intrinsics in the compiler)
xserver_save_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $MMX_CFLAGS"
AC_COMPILE_IFELSE([
#if defined(__GNUC__) && (__GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4))
#error "Need GCC >= 3.4 for MMX intrinsics"
#endif
#include <mmintrin.h>
int main () {
    __m64 v = _mm_cvtsi32_si64 (1);
    __m64 w = _mm_slli_si64 (v, 1);
    v = _mm_or_si64 (v, w);
    return _mm_cvtsi64_si32 (v);
}], have_mmx_intrinsics=yes)
CFLAGS=$xserver_save_CFLAGS
AC_MSG_RESULT($have_mmx_intrinsics)

if test $have_mmx_intrinsics = yes ; then
   AC_DEFINE(USE_MMX, 1, [use MMX compiler intrinsics])
else
   MMX_CFLAGS=
fi
AC_SUBST(MMX_CFLAGS)

AM_CONDITIONAL(USE_MMX, test $have_mmx_intrinsics = yes)

dnl ===========================================================================

AC_ARG_ENABLE(gcov,
  AS_HELP_STRING([--enable-gcov],
		 [Enable gcov]),
  [use_gcov=$enableval], [use_gcov=no])

if test "x$use_gcov" = "xyes"; then
  dnl we need gcc:
  if test "$GCC" != "yes"; then
    AC_MSG_ERROR([GCC is required for --enable-gcov])
  fi

  dnl Check if ccache is being used
  case `shtool path $CC` in
    *ccache*[)] gcc_ccache=yes;;
    *[)] gcc_ccache=no;;
  esac

  if test "$gcc_ccache" = "yes" && (test -z "$CCACHE_DISABLE" || test "$CCACHE_DISABLE" != "1"); then
    AC_MSG_ERROR([ccache must be disabled when --enable-gcov option is used. You can disable ccache by setting environment variable CCACHE_DISABLE=1.])
  fi

  ltp_version_list="1.4"
  AC_CHECK_PROG(LTP, lcov, lcov)
  AC_CHECK_PROG(LTP_GENHTML, genhtml, genhtml)

  if test "$LTP"; then
    AC_CACHE_CHECK([for ltp version], cairo_cv_ltp_version, [
      cairo_cv_ltp_version=invalid
      ltp_version=`$LTP -v 2>/dev/null | $SED -e 's/^.* //'`
      for ltp_check_version in $ltp_version_list; do
        if test "$ltp_version" = "$ltp_check_version"; then
          cairo_cv_ltp_version="$ltp_check_version (ok)"
        fi
      done
    ])
  else
    ltp_msg="To enable code coverage reporting you must have one of the following LTP versions installed: $ltp_version_list"
    AC_MSG_ERROR([$ltp_msg])
  fi

  case $cairo_cv_ltp_version in
    ""|invalid[)]
      ltp_msg="You must have one of the following versions of LTP: $ltp_version_list (found: $ltp_version)."
      AC_MSG_ERROR([$ltp_msg])
      LTP="exit 0;"
      ;;
  esac

  if test -z "$LTP_GENHTML"; then
    AC_MSG_ERROR([Could not find genhtml from the LTP package])
  fi

  AC_DEFINE(HAVE_GCOV, 1, [Whether you have gcov])
dnl  PHP_ADD_MAKEFILE_FRAGMENT($abs_srcdir/Makefile.gcov, $abs_srcdir)

  dnl Remove all optimization flags from CFLAGS
  changequote({,})
  CAIRO_CFLAGS=`echo "$CAIRO_CFLAGS" | $SED -e 's/-O[0-9]*//g'`
  changequote([,])

  dnl Add the special gcc flags
  CAIRO_CFLAGS="$CAIRO_CFLAGS -O0 -fprofile-arcs -ftest-coverage"
fi

dnl ===========================================================================

AC_ARG_ENABLE(test-surfaces,
  AS_HELP_STRING([--enable-test-surfaces],
		 [Add backends for more test suite coverage (no additional public functionality)]),
  [use_test_surfaces=$enableval], [use_test_surfaces=no])

AM_CONDITIONAL(CAIRO_HAS_TEST_SURFACES, test "x$use_test_surfaces" = "xyes")
if test "x$use_test_surfaces" = "xyes"; then
  AC_DEFINE(CAIRO_HAS_TEST_SURFACES, 1, [define in the extra test surface have been built into cairo for the test suite])
fi

dnl ===========================================================================

AC_CONFIG_COMMANDS([src/cairo-features.h],
[
	featuresfile=src/cairo-features.h
	outfile=$featuresfile.tmp
	AC_MSG_NOTICE([creating $featuresfile])
	cat > $outfile <<_EOF
/* Generated by configure.  Do not edit */
#ifndef CAIRO_FEATURES_H
#define CAIRO_FEATURES_H

#ifdef  __cplusplus
# define CAIRO_BEGIN_DECLS  extern "C" {
# define CAIRO_END_DECLS    }
#else
# define CAIRO_BEGIN_DECLS
# define CAIRO_END_DECLS
#endif

#ifndef cairo_public
# define cairo_public
#endif

#define CAIRO_VERSION_MAJOR $CAIRO_VERSION_MAJOR
#define CAIRO_VERSION_MINOR $CAIRO_VERSION_MINOR
#define CAIRO_VERSION_MICRO $CAIRO_VERSION_MICRO

#define CAIRO_VERSION_STRING "$CAIRO_VERSION_MAJOR.$CAIRO_VERSION_MINOR.$CAIRO_VERSION_MICRO"

_EOF
	for FEATURE in $CAIRO_FEATURES; do
		echo "#define CAIRO_HAS_$FEATURE 1" >> $outfile
	done

	echo '' >> $outfile
	echo '#endif' >> $outfile

	if cmp -s $outfile $featuresfile; then
	  AC_MSG_NOTICE([$featuresfile is unchanged])
	  rm -f $outfile
	else
	  mv $outfile $featuresfile
	fi
],[
	CAIRO_FEATURES='$CAIRO_FEATURES'
	CAIRO_VERSION_MAJOR=$CAIRO_VERSION_MAJOR
	CAIRO_VERSION_MINOR=$CAIRO_VERSION_MINOR
	CAIRO_VERSION_MICRO=$CAIRO_VERSION_MICRO
])
AC_CONFIG_FILES([
Makefile
pixman/Makefile
pixman/src/Makefile
src/Makefile
test/Makefile
doc/Makefile
doc/public/Makefile
doc/public/version.xml
src/cairo.pc
])

AC_OUTPUT

dnl ===========================================================================

echo ""
echo "cairo will be compiled with the following surface backends:"
echo "  image:         yes (always builtin)"
echo "  Xlib:          $use_xlib"
echo "  Xlib Xrender:  $use_xlib_xrender"
echo "  Quartz:        $use_quartz"
echo "  XCB:           $use_xcb"
echo "  Win32:         $use_win32"
echo "  PostScript:    $use_ps"
echo "  PDF:           $use_pdf"
echo "  SVG:           $use_svg"
echo "  glitz:         $use_glitz"
echo "  BeOS:          $use_beos"
echo "  DirectFB:      $use_directfb"
echo ""
echo "the following font backends:"
echo "  FreeType:      $use_ft"
echo "  Win32:         $use_win32_font"
echo "  ATSUI:         $use_atsui"
echo ""
echo "the following features:"
echo "  PNG functions: $use_png"
echo ""
echo "and the following debug options:"
echo "  gcov support:  $use_gcov"
echo "  test surfaces: $use_test_surfaces"
echo ""
echo "using CFLAGS:"
echo $CAIRO_CFLAGS
echo ""

if test x"$use_ft"         != "xyes" && \
   test x"$use_win32_font" != "xyes" && \
   test x"$use_atsui"      != "xyes" ; then

   AC_MSG_ERROR([Cairo requires at least one font backend.
		  Please install freetype and fontconfig, then try again:
		  http://freetype.org/	http://fontconfig.org/
		])
fi

WARNING_MESSAGE='
*** The @BACKEND@ backend is still under active development and
*** is included in this release only as a preview. It does not
*** fully work yet and incompatible changes may yet be made
*** to @BACKEND@-backend specific API.
'

if test x"$use_glitz" = "xyes" ; then
   echo "$WARNING_MESSAGE" | sed 's/@BACKEND@/Glitz/'
fi

if test x"$use_xcb" = "xyes" ; then
   echo "$WARNING_MESSAGE" | sed 's/@BACKEND@/XCB/'
fi

if test x"$use_quartz" = "xyes" ; then
   echo "$WARNING_MESSAGE" | sed 's/@BACKEND@/Quartz/'
fi

if test x"$use_quartz" = "xyes" ; then
   echo "$WARNING_MESSAGE" | sed 's/@BACKEND@/ATSUI/'
fi

if test x"$use_beos" = "xyes" ; then
   echo "$WARNING_MESSAGE" | sed 's/@BACKEND@/BeOS/'
fi

if test x"$use_directfb" = "xyes" ; then
     echo "$WARNING_MESSAGE" | sed 's/@BACKEND@/DirectFB/'
fi