Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

5 files changed, 661 insertions, 0 deletions

diff --git a/Source/autotools/acinclude.m4 b/Source/autotools/acinclude.m4
new file mode 100644
index 0000000..5ad0977
--- /dev/null
+++ b/Source/autotools/acinclude.m4
@@ -0,0 +1,178 @@
+# ===========================================================================
+#           http://autoconf-archive.cryp.to/ax_compare_version.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_COMPARE_VERSION(VERSION_A, OP, VERSION_B, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
+#
+# DESCRIPTION
+#
+#   This macro compares two version strings. Due to the various number of
+#   minor-version numbers that can exist, and the fact that string
+#   comparisons are not compatible with numeric comparisons, this is not
+#   necessarily trivial to do in a autoconf script. This macro makes doing
+#   these comparisons easy.
+#
+#   The six basic comparisons are available, as well as checking equality
+#   limited to a certain number of minor-version levels.
+#
+#   The operator OP determines what type of comparison to do, and can be one
+#   of:
+#
+#    eq  - equal (test A == B)
+#    ne  - not equal (test A != B)
+#    le  - less than or equal (test A <= B)
+#    ge  - greater than or equal (test A >= B)
+#    lt  - less than (test A < B)
+#    gt  - greater than (test A > B)
+#
+#   Additionally, the eq and ne operator can have a number after it to limit
+#   the test to that number of minor versions.
+#
+#    eq0 - equal up to the length of the shorter version
+#    ne0 - not equal up to the length of the shorter version
+#    eqN - equal up to N sub-version levels
+#    neN - not equal up to N sub-version levels
+#
+#   When the condition is true, shell commands ACTION-IF-TRUE are run,
+#   otherwise shell commands ACTION-IF-FALSE are run. The environment
+#   variable 'ax_compare_version' is always set to either 'true' or 'false'
+#   as well.
+#
+#   Examples:
+#
+#     AX_COMPARE_VERSION([3.15.7],[lt],[3.15.8])
+#     AX_COMPARE_VERSION([3.15],[lt],[3.15.8])
+#
+#   would both be true.
+#
+#     AX_COMPARE_VERSION([3.15.7],[eq],[3.15.8])
+#     AX_COMPARE_VERSION([3.15],[gt],[3.15.8])
+#
+#   would both be false.
+#
+#     AX_COMPARE_VERSION([3.15.7],[eq2],[3.15.8])
+#
+#   would be true because it is only comparing two minor versions.
+#
+#     AX_COMPARE_VERSION([3.15.7],[eq0],[3.15])
+#
+#   would be true because it is only comparing the lesser number of minor
+#   versions of the two values.
+#
+#   Note: The characters that separate the version numbers do not matter. An
+#   empty string is the same as version 0. OP is evaluated by autoconf, not
+#   configure, so must be a string, not a variable.
+#
+#   The author would like to acknowledge Guido Draheim whose advice about
+#   the m4_case and m4_ifvaln functions make this macro only include the
+#   portions necessary to perform the specific comparison specified by the
+#   OP argument in the final configure script.
+#
+# LAST MODIFICATION
+#
+#   2008-04-12
+#
+# COPYLEFT
+#
+#   Copyright (c) 2008 Tim Toolan <toolan@ele.uri.edu>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved.
+
+dnl #########################################################################
+AC_DEFUN([AX_COMPARE_VERSION], [
+  AC_PROG_AWK
+
+  # Used to indicate true or false condition
+  ax_compare_version=false
+
+  # Convert the two version strings to be compared into a format that
+  # allows a simple string comparison.  The end result is that a version
+  # string of the form 1.12.5-r617 will be converted to the form
+  # 0001001200050617.  In other words, each number is zero padded to four
+  # digits, and non digits are removed.
+  AS_VAR_PUSHDEF([A],[ax_compare_version_A])
+  A=`echo "$1" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \
+                     -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \
+                     -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \
+                     -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \
+                     -e 's/[[^0-9]]//g'`
+
+  AS_VAR_PUSHDEF([B],[ax_compare_version_B])
+  B=`echo "$3" | sed -e 's/\([[0-9]]*\)/Z\1Z/g' \
+                     -e 's/Z\([[0-9]]\)Z/Z0\1Z/g' \
+                     -e 's/Z\([[0-9]][[0-9]]\)Z/Z0\1Z/g' \
+                     -e 's/Z\([[0-9]][[0-9]][[0-9]]\)Z/Z0\1Z/g' \
+                     -e 's/[[^0-9]]//g'`
+
+  dnl # In the case of le, ge, lt, and gt, the strings are sorted as necessary
+  dnl # then the first line is used to determine if the condition is true.
+  dnl # The sed right after the echo is to remove any indented white space.
+  m4_case(m4_tolower($2),
+  [lt],[
+    ax_compare_version=`echo "x$A
+x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/false/;s/x${B}/true/;1q"`
+  ],
+  [gt],[
+    ax_compare_version=`echo "x$A
+x$B" | sed 's/^ *//' | sort | sed "s/x${A}/false/;s/x${B}/true/;1q"`
+  ],
+  [le],[
+    ax_compare_version=`echo "x$A
+x$B" | sed 's/^ *//' | sort | sed "s/x${A}/true/;s/x${B}/false/;1q"`
+  ],
+  [ge],[
+    ax_compare_version=`echo "x$A
+x$B" | sed 's/^ *//' | sort -r | sed "s/x${A}/true/;s/x${B}/false/;1q"`
+  ],[
+    dnl Split the operator from the subversion count if present.
+    m4_bmatch(m4_substr($2,2),
+    [0],[
+      # A count of zero means use the length of the shorter version.
+      # Determine the number of characters in A and B.
+      ax_compare_version_len_A=`echo "$A" | $AWK '{print(length)}'`
+      ax_compare_version_len_B=`echo "$B" | $AWK '{print(length)}'`
+
+      # Set A to no more than B's length and B to no more than A's length.
+      A=`echo "$A" | sed "s/\(.\{$ax_compare_version_len_B\}\).*/\1/"`
+      B=`echo "$B" | sed "s/\(.\{$ax_compare_version_len_A\}\).*/\1/"`
+    ],
+    [[0-9]+],[
+      # A count greater than zero means use only that many subversions
+      A=`echo "$A" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"`
+      B=`echo "$B" | sed "s/\(\([[0-9]]\{4\}\)\{m4_substr($2,2)\}\).*/\1/"`
+    ],
+    [.+],[
+      AC_WARNING(
+        [illegal OP numeric parameter: $2])
+    ],[])
+
+    # Pad zeros at end of numbers to make same length.
+    ax_compare_version_tmp_A="$A`echo $B | sed 's/./0/g'`"
+    B="$B`echo $A | sed 's/./0/g'`"
+    A="$ax_compare_version_tmp_A"
+
+    # Check for equality or inequality as necessary.
+    m4_case(m4_tolower(m4_substr($2,0,2)),
+    [eq],[
+      test "x$A" = "x$B" && ax_compare_version=true
+    ],
+    [ne],[
+      test "x$A" != "x$B" && ax_compare_version=true
+    ],[
+      AC_WARNING([illegal OP parameter: $2])
+    ])
+  ])
+
+  AS_VAR_POPDEF([A])dnl
+  AS_VAR_POPDEF([B])dnl
+
+  dnl # Execute ACTION-IF-TRUE / ACTION-IF-FALSE.
+  if test "$ax_compare_version" = "true" ; then
+    m4_ifvaln([$4],[$4],[:])dnl
+    m4_ifvaln([$5],[else $5])dnl
+  fi
+]) dnl AX_COMPARE_VERSION
diff --git a/Source/autotools/dolt.m4 b/Source/autotools/dolt.m4
new file mode 100644
index 0000000..4ae9855
--- /dev/null
+++ b/Source/autotools/dolt.m4
@@ -0,0 +1,181 @@
+dnl dolt, a replacement for libtool
+dnl Copyright © 2007-2008 Josh Triplett <josh@freedesktop.org>
+dnl Copying and distribution of this file, with or without modification,
+dnl are permitted in any medium without royalty provided the copyright
+dnl notice and this notice are preserved.
+dnl
+dnl To use dolt, invoke the DOLT macro immediately after the libtool macros.
+dnl Optionally, copy this file into acinclude.m4, to avoid the need to have it
+dnl installed when running autoconf on your project.
+
+AC_DEFUN([DOLT], [
+AC_REQUIRE([AC_CANONICAL_HOST])
+# dolt, a replacement for libtool
+# Josh Triplett <josh@freedesktop.org>
+AC_PATH_PROG(DOLT_BASH, bash)
+AC_MSG_CHECKING([if dolt supports this host])
+dolt_supported=yes
+if test x$DOLT_BASH = x; then
+    dolt_supported=no
+fi
+if test x$GCC != xyes; then
+    dolt_supported=no
+fi
+case $host in
+i?86-*-linux*|x86_64-*-linux*|powerpc-*-linux* \
+|amd64-*-freebsd*|i?86-*-freebsd*|ia64-*-freebsd*)
+    pic_options='-fPIC'
+    ;;
+i?86-apple-darwin*)
+    pic_options='-fno-common'
+    ;;
+*mingw32*)
+    pic_options='-DDLL_EXPORT'
+    ;;
+*)
+    dolt_supported=no
+    ;;
+esac
+if test x$dolt_supported = xno ; then
+    AC_MSG_RESULT([no, falling back to libtool])
+    LTCOMPILE='$(LIBTOOL) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(COMPILE)'
+    LTCXXCOMPILE='$(LIBTOOL) --tag=CXX $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CXXCOMPILE)'
+else
+    AC_MSG_RESULT([yes, replacing libtool])
+
+dnl Start writing out doltcompile.
+    cat <<__DOLTCOMPILE__EOF__ >doltcompile
+#!$DOLT_BASH
+__DOLTCOMPILE__EOF__
+    cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+args=("$[]@")
+for ((arg=0; arg<${#args@<:@@@:>@}; arg++)) ; do
+    if test x"${args@<:@$arg@:>@}" = x-o ; then
+        objarg=$((arg+1))
+        break
+    fi
+done
+if test x$objarg = x ; then
+    echo 'Error: no -o on compiler command line' 1>&2
+    exit 1
+fi
+lo="${args@<:@$objarg@:>@}"
+obj="${lo%.lo}"
+if test x"$lo" = x"$obj" ; then
+    echo "Error: libtool object file name \"$lo\" does not end in .lo" 1>&2
+    exit 1
+fi
+objbase="${obj##*/}"
+__DOLTCOMPILE__EOF__
+
+dnl Write out shared compilation code.
+    if test x$enable_shared = xyes; then
+        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+libobjdir="${obj%$objbase}.libs"
+if test ! -d "$libobjdir" ; then
+    mkdir_out="$(mkdir "$libobjdir" 2>&1)"
+    mkdir_ret=$?
+    if test "$mkdir_ret" -ne 0 && test ! -d "$libobjdir" ; then
+	echo "$mkdir_out" 1>&2
+        exit $mkdir_ret
+    fi
+fi
+pic_object="$libobjdir/$objbase.o"
+args@<:@$objarg@:>@="$pic_object"
+__DOLTCOMPILE__EOF__
+    cat <<__DOLTCOMPILE__EOF__ >>doltcompile
+"\${args@<:@@@:>@}" $pic_options -DPIC || exit \$?
+__DOLTCOMPILE__EOF__
+    fi
+
+dnl Write out static compilation code.
+dnl Avoid duplicate compiler output if also building shared objects.
+    if test x$enable_static = xyes; then
+        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+non_pic_object="$obj.o"
+args@<:@$objarg@:>@="$non_pic_object"
+__DOLTCOMPILE__EOF__
+        if test x$enable_shared = xyes; then
+            cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+"${args@<:@@@:>@}" >/dev/null 2>&1 || exit $?
+__DOLTCOMPILE__EOF__
+        else
+            cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+"${args@<:@@@:>@}" || exit $?
+__DOLTCOMPILE__EOF__
+        fi
+    fi
+
+dnl Write out the code to write the .lo file.
+dnl The second line of the .lo file must match "^# Generated by .*libtool"
+    cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+{
+echo "# $lo - a libtool object file"
+echo "# Generated by doltcompile, not libtool"
+__DOLTCOMPILE__EOF__
+
+    if test x$enable_shared = xyes; then
+        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+echo "pic_object='.libs/${objbase}.o'"
+__DOLTCOMPILE__EOF__
+    else
+        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+echo pic_object=none
+__DOLTCOMPILE__EOF__
+    fi
+
+    if test x$enable_static = xyes; then
+        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+echo "non_pic_object='${objbase}.o'"
+__DOLTCOMPILE__EOF__
+    else
+        cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+echo non_pic_object=none
+__DOLTCOMPILE__EOF__
+    fi
+
+    cat <<'__DOLTCOMPILE__EOF__' >>doltcompile
+} > "$lo"
+__DOLTCOMPILE__EOF__
+
+dnl Done writing out doltcompile; substitute it for libtool compilation.
+    chmod +x doltcompile
+    LTCOMPILE='$(top_builddir)/doltcompile $(COMPILE)'
+    LTCXXCOMPILE='$(top_builddir)/doltcompile $(CXXCOMPILE)'
+
+dnl automake ignores LTCOMPILE and LTCXXCOMPILE when it has separate CFLAGS for
+dnl a target, so write out a libtool wrapper to handle that case.
+dnl Note that doltlibtool does not handle inferred tags or option arguments
+dnl without '=', because automake does not use them.
+    cat <<__DOLTLIBTOOL__EOF__ > doltlibtool
+#!$DOLT_BASH
+__DOLTLIBTOOL__EOF__
+    cat <<'__DOLTLIBTOOL__EOF__' >>doltlibtool
+top_builddir_slash="${0%%doltlibtool}"
+: ${top_builddir_slash:=./}
+args=()
+modeok=false
+tagok=false
+for arg in "$[]@"; do
+    case "$arg" in
+        --silent) ;;
+        --mode=compile) modeok=true ;;
+        --tag=CC|--tag=CXX) tagok=true ;;
+        *) args@<:@${#args[@]}@:>@="$arg" ;;
+    esac
+done
+if $modeok && $tagok ; then
+    . ${top_builddir_slash}doltcompile "${args@<:@@@:>@}"
+else
+    exec ${top_builddir_slash}libtool "$[]@"
+fi
+__DOLTLIBTOOL__EOF__
+
+dnl Done writing out doltlibtool; substitute it for libtool.
+    chmod +x doltlibtool
+    LIBTOOL='$(top_builddir)/doltlibtool'
+fi
+AC_SUBST(LTCOMPILE)
+AC_SUBST(LTCXXCOMPILE)
+# end dolt
+])
diff --git a/Source/autotools/gsettings.m4 b/Source/autotools/gsettings.m4
new file mode 100644
index 0000000..ac9945e
--- /dev/null
+++ b/Source/autotools/gsettings.m4
@@ -0,0 +1,93 @@
+dnl GLIB_GSETTINGS
+dnl Defines GSETTINGS_SCHEMAS_INSTALL which controls whether
+dnl the schema should be compiled
+dnl
+
+AC_DEFUN([GLIB_GSETTINGS],
+[
+  m4_pattern_allow([AM_V_GEN])
+  AC_ARG_ENABLE(schemas-compile,
+                AC_HELP_STRING([--disable-schemas-compile],
+                               [Disable regeneration of gschemas.compiled on install]),
+                [case ${enableval} in
+                  yes) GSETTINGS_DISABLE_SCHEMAS_COMPILE=""  ;;
+                  no)  GSETTINGS_DISABLE_SCHEMAS_COMPILE="1" ;;
+                  *) AC_MSG_ERROR([bad value ${enableval} for --enable-schemas-compile]) ;;
+                 esac])
+  AC_SUBST([GSETTINGS_DISABLE_SCHEMAS_COMPILE])
+  PKG_PROG_PKG_CONFIG([0.16])
+  AC_SUBST(gsettingsschemadir, [${datadir}/glib-2.0/schemas])
+  if test x$cross_compiling != xyes; then
+    GLIB_COMPILE_SCHEMAS=`$PKG_CONFIG --variable glib_compile_schemas gio-2.0`
+  else
+    AC_PATH_PROG(GLIB_COMPILE_SCHEMAS, glib-compile-schemas)
+  fi
+  AC_SUBST(GLIB_COMPILE_SCHEMAS)
+  if test "x$GLIB_COMPILE_SCHEMAS" = "x"; then
+    ifelse([$2],,[AC_MSG_ERROR([glib-compile-schemas not found.])],[$2])
+  else
+    ifelse([$1],,[:],[$1])
+  fi
+
+  GSETTINGS_RULES='
+.PHONY : uninstall-gsettings-schemas install-gsettings-schemas clean-gsettings-schemas
+
+mostlyclean-am: clean-gsettings-schemas
+
+gsettings__enum_file = $(addsuffix .enums.xml,$(gsettings_ENUM_NAMESPACE))
+
+%.gschema.valid: %.gschema.xml $(gsettings__enum_file)
+	$(AM_V_GEN) if test -f "$<"; then d=; else d="$(srcdir)/"; fi; $(GLIB_COMPILE_SCHEMAS) --dry-run $(addprefix --schema-file=,$(gsettings__enum_file)) --schema-file=$${d}$< && touch [$]@
+
+all-am: $(gsettings_SCHEMAS:.xml=.valid)
+uninstall-am: uninstall-gsettings-schemas
+install-data-am: install-gsettings-schemas
+
+.SECONDARY: $(gsettings_SCHEMAS)
+
+gsettings__base_list = \
+  sed "$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g" | \
+  sed "$$!N;$$!N;$$!N;$$!N;s/\n/ /g"
+
+install-gsettings-schemas: $(gsettings_SCHEMAS:.xml=.valid) $(gsettings__enum_file)
+	@$(NORMAL_INSTALL)
+	test -z "$(gsettingsschemadir)" || $(MKDIR_P) "$(DESTDIR)$(gsettingsschemadir)"
+	@list='\''$(gsettings__enum_file) $(gsettings_SCHEMAS)'\''; test -n "$(gsettingsschemadir)" || list=; \
+	for p in $$list; do \
+	  if test -f "$$p"; then d=; else d="$(srcdir)/"; fi; \
+	  echo "$$d$$p"; \
+	done | $(gsettings__base_list) | \
+	while read files; do \
+	  echo " $(INSTALL_DATA) $$files '\''$(DESTDIR)$(gsettingsschemadir)'\''"; \
+	  $(INSTALL_DATA) $$files "$(DESTDIR)$(gsettingsschemadir)" || exit $$?; \
+	done
+	test -n "$(GSETTINGS_DISABLE_SCHEMAS_COMPILE)$(DESTDIR)" || $(GLIB_COMPILE_SCHEMAS) $(gsettingsschemadir)
+
+uninstall-gsettings-schemas:
+	@$(NORMAL_UNINSTALL)
+	@list='\''$(gsettings_SCHEMAS) $(gsettings__enum_file)'\''; test -n "$(gsettingsschemadir)" || list=; \
+	files=`for p in $$list; do echo $$p; done | sed -e '\''s|^.*/||'\''`; \
+	test -n "$$files" || exit 0; \
+	echo " ( cd '\''$(DESTDIR)$(gsettingsschemadir)'\'' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(gsettingsschemadir)" && rm -f $$files
+	test -n "$(GSETTINGS_DISABLE_SCHEMAS_COMPILE)$(DESTDIR)" || $(GLIB_COMPILE_SCHEMAS) $(gsettingsschemadir)
+
+clean-gsettings-schemas:
+	rm -f $(gsettings_SCHEMAS:.xml=.valid) $(gsettings__enum_file)
+
+ifdef gsettings_ENUM_NAMESPACE
+$(gsettings__enum_file): $(gsettings_ENUM_FILES)
+	$(AM_V_GEN) glib-mkenums --comments '\''<!-- @comment@ -->'\'' --fhead "<schemalist>" --vhead "  <@type@ id='\''$(gsettings_ENUM_NAMESPACE).@EnumName@'\''>" --vprod "    <value nick='\''@valuenick@'\'' value='\''@valuenum@'\''/>" --vtail "  </@type@>" --ftail "</schemalist>" $(gsettings_ENUM_FILES) > [$]@.tmp && mv [$]@.tmp [$]@
+endif
+'
+  _GSETTINGS_SUBST(GSETTINGS_RULES)
+])
+
+dnl _GSETTINGS_SUBST(VARIABLE)
+dnl Abstract macro to do either _AM_SUBST_NOTMAKE or AC_SUBST
+AC_DEFUN([_GSETTINGS_SUBST],
+[
+AC_SUBST([$1])
+m4_ifdef([_AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE([$1])])
+]
+)
diff --git a/Source/autotools/symbols.filter b/Source/autotools/symbols.filter
new file mode 100644
index 0000000..4eeadf4
--- /dev/null
+++ b/Source/autotools/symbols.filter
@@ -0,0 +1,31 @@
+{
+global:
+_ZN3WTF10fastCalloc*;
+_ZN3WTF10fastMalloc*;
+_ZN3WTF10fastStrDupEPKc;
+_ZN3WTF11fastReallocEPvm;
+_ZN3WTF14fastMallocSizeEPKv;
+_ZN3WTF16fastZeroedMallocEm;
+_ZN3WTF20fastMallocStatisticsEv;
+_ZN3WTF8fastFreeEPv;
+_ZN3WTF13freeOwnedGPtrI7_GErrorEEvPT_;
+_ZN3WTF3MD58addBytes*;
+_ZN3WTF3MD58checksum*;
+_ZN3WTF3MD5C1Ev;
+_ZN3WTF3MD5C2Ev;
+_ZN3WTFL12MD5TransformEPjPKj;
+_ZN3WTF7CString11mutableDataEv;
+_ZN3WTF7CString16newUninitializedEmRPc;
+_ZN3WTF7CString18copyBufferIfNeededEv;
+_ZN3WTF7CString4initEPKcm;
+_ZN3WTF7CStringC1EPKc;
+_ZN3WTF7CStringC1EPKcm;
+_ZN3WTF7CStringC2EPKc;
+_ZN3WTF7CStringC2EPKcm;
+_ZN3WTF7CStringD1Ev;
+_ZN3WTF7CStringaSERKS0_;
+_ZN24DumpRenderTreeSupportGtk*;
+local:
+_Z*;
+cti*;
+};
diff --git a/Source/autotools/webkit.m4 b/Source/autotools/webkit.m4
new file mode 100644
index 0000000..4d8cf74
--- /dev/null
+++ b/Source/autotools/webkit.m4
@@ -0,0 +1,178 @@
+dnl macros to check for JavaScriptCore and WebKit/Gtk+ dependencies
+dnl
+dnl The rationale is so that we can share these macros between 
+dnl WebKit and JavaScriptCore builds.
+
+# global states
+m4_define([initialized], [no])
+
+AC_DEFUN([INIT_C_CXX_FLAGS],
+[dnl
+# If CXXFLAGS and CFLAGS are unset, default to empty.
+# This is to tell automake not to include '-g' if CXXFLAGS is not set
+# For more info - http://www.gnu.org/software/automake/manual/autoconf.html#C_002b_002b-Compiler
+if test -z "$CXXFLAGS"; then
+   CXXFLAGS=""
+fi
+if test -z "$CFLAGS"; then
+   CFLAGS=""
+fi
+])
+
+AC_DEFUN_ONCE([WEBKIT_INIT],
+[dnl
+dnl check if we have the required packages to have successful checks
+dnl
+# Make sure CXXFLAGS and CFLAGS are set before expanding AC_PROG_CXX to avoid
+# building with '-g -O2' on Release builds.
+AC_REQUIRE([INIT_C_CXX_FLAGS])
+
+# check for -fvisibility=hidden compiler support (GCC >= 4)
+saved_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -fvisibility=hidden -fvisibility-inlines-hidden"
+AC_MSG_CHECKING([if ${CXX} supports -fvisibility=hidden -fvisibility-inlines-hidden])
+AC_COMPILE_IFELSE([char foo;],
+      [ AC_MSG_RESULT([yes])
+        SYMBOL_VISIBILITY="-fvisibility=hidden" SYMBOL_VISIBILITY_INLINES="-fvisibility-inlines-hidden" ],
+        AC_MSG_RESULT([no]))
+CFLAGS="$saved_CFLAGS"
+AC_SUBST(SYMBOL_VISIBILITY)
+AC_SUBST(SYMBOL_VISIBILITY_INLINES)
+
+# check for pkg-config
+AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
+if test "$PKG_CONFIG" = "no"; then
+   AC_MSG_ERROR([Cannot find pkg-config, make sure it is installed in your PATH])
+fi
+
+AC_PATH_PROG(PERL, perl)
+if test -z "$PERL"; then
+   AC_MSG_ERROR([You need 'perl' to compile WebKit])
+fi
+
+AC_PATH_PROG(PYTHON, python)
+if test -z "$PYTHON"; then
+   AC_MSG_ERROR([You need 'python' to compile WebKit])
+fi
+
+AC_PATH_PROG(BISON, bison)
+if test -z "$BISON"; then
+   AC_MSG_ERROR([You need the 'bison' parser generator to compile WebKit])
+fi
+
+AC_PATH_PROG(MV, mv)
+if test -z "$MV"; then
+   AC_MSG_ERROR([You need 'mv' to compile WebKit])
+fi
+
+AC_REQUIRE([AC_PROG_CC])
+AC_REQUIRE([AC_PROG_CXX])
+AM_PROG_CC_STDC
+AM_PROG_CC_C_O
+AC_PROG_INSTALL
+AC_SYS_LARGEFILE
+
+# Check whether a C++ was found (AC_PROG_CXX sets $CXX to "g++" even when it
+# doesn't exist)
+AC_LANG_PUSH([C++])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],[],[AC_MSG_ERROR([No C++ compiler found])])
+AC_LANG_POP([C++])
+
+# C/C++ Language Features
+AC_C_CONST
+AC_C_INLINE
+AC_C_VOLATILE
+
+# C/C++ Headers
+AC_REQUIRE([AC_HEADER_STDC])
+AC_HEADER_STDBOOL
+
+m4_define([initialized], [yes])
+])
+
+AC_DEFUN_ONCE([WEBKIT_CHECK_DEPENDENCIES],
+[dnl
+dnl check for module dependencies
+for module in $1
+do
+    case $module in
+        glib) _WEBKIT_CHECK_GLIB ;;
+        unicode) _WEBKIT_CHECK_UNICODE ;;
+        *) AC_MSG_ERROR([I don't support that module. Sorry..]) ;;
+
+    esac
+done
+])
+
+AC_DEFUN_ONCE([_WEBKIT_CHECK_GLIB],
+[dnl
+dnl check for glib
+# Version requirements
+GLIB_REQUIRED_VERSION=2.24
+GOBJECT_REQUIRED_VERSION=2.0
+GTHREAD_REQUIRED_VERSION=2.0
+
+PKG_CHECK_MODULES([GLIB],
+                  [glib-2.0 >= $GLIB_REQUIRED_VERSION
+                  gobject-2.0 >= $GOBJECT_REQUIRED_VERSION
+                  gthread-2.0 >= $GTHREAD_REQUIRED_VERSION])
+AC_SUBST([GLIB_CFLAGS])
+AC_SUBST([GLIB_LIBS])
+
+# GTK+ port only
+# Check for glib-genmarshal and glib-mkenums
+AC_PATH_PROG([GLIB_GENMARSHAL], [glib-genmarshal])
+AC_PATH_PROG([GLIB_MKENUMS],[glib-mkenums])
+if test -z "$GLIB_GENMARSHAL" || test -z "$GLIB_MKENUMS"; then
+   AC_MSG_ERROR([You need the GLib dev tools in your path])
+fi
+])
+
+AC_DEFUN_ONCE([_WEBKIT_CHECK_UNICODE],
+[dnl
+dnl determine the Unicode backend
+AC_MSG_CHECKING([which Unicode backend to use])
+AC_ARG_WITH(unicode_backend,
+            AC_HELP_STRING([--with-unicode-backend=@<:@icu/glib@:>@],
+                           [Select Unicode backend (WARNING: the glib-based backend is slow, and incomplete) [default=icu]]),
+            [],[with_unicode_backend="icu"])
+
+case "$with_unicode_backend" in
+     icu|glib) ;;
+     *) AC_MSG_ERROR([Invalid Unicode backend: must be icu or glib.]) ;;
+esac
+
+AC_MSG_RESULT([$with_unicode_backend])
+
+if test "$with_unicode_backend" = "icu"; then
+        case "$host" in
+            *-*-darwin*)
+		UNICODE_CFLAGS="-I$srcdir/Source/JavaScriptCore/icu -I$srcdir/Source/WebCore/icu"
+		UNICODE_LIBS="-licucore"
+                ;;
+            *-*-mingw*)
+		UNICODE_CFLAGS=""
+		UNICODE_LIBS="-licuin -licuuc"
+                ;;
+            *)
+		AC_PATH_PROG(icu_config, icu-config, no)
+		if test "$icu_config" = "no"; then
+			AC_MSG_ERROR([Cannot find icu-config. The ICU library is needed.])
+		fi
+
+		# We don't use --cflags as this gives us a lot of things that we don't
+		# necessarily want, like debugging and optimization flags
+		# See man (1) icu-config for more info.
+		UNICODE_CFLAGS=`$icu_config --cppflags`
+		UNICODE_LIBS=`$icu_config --ldflags-libsonly`
+                ;;
+        esac
+fi
+
+if test "$with_unicode_backend" = "glib"; then
+	PKG_CHECK_MODULES([UNICODE], [glib-2.0 pango >= 1.21.0])
+fi
+
+AC_SUBST([UNICODE_CFLAGS])
+AC_SUBST([UNICODE_LIBS])
+])