Re: [Libreoffice] PDF converter cross compilation general questions

Hi Andrzej,

Il 26/01/2012 15:01, Andrzej.Pacanowski@tieto.com ha scritto:
> Hi guys,
>
> I've been investigating a possibility of LibreOffice cross-compilation for Linux X-less device(ARM) 
> and use it as document(writer/calc/impress) to pdf converter.

i'd like to do more or less the same :)

> 1)      Is it possible to compile LO without any graphic library (pure -headless)? Or how much work 
> would that require?

AFAIK, not at the moment :)

> 5)      If we're about hacking the build process to our needs (removing dependencies) where should 
> we start?

You can take a look at the embarassing attached patch (should apply to 
git master), that breaks compilation btw :), which i'm slowly trying to 
figure out how to fix.

You may also want to take a look at this ./autogen.sh invocation where 
you probably want to remove all the --without-system-* to reuse existing 
system libraries.

./autogen.sh --without-help --without-junit --without-java --disable-epm 
--disable-gtk --disable-gtk3 --disable-odk --disable-vba 
--disable-mozilla --disable-gstreamer --disable-randr --without-ppds 
--without-afms --disable-cairo-canvas --disable-neon --disable-dbus 
--disable-systray --disable-mathmldtd  --disable-extension-integration 
--with-system-libs --without-system-libvisio --without-system-libcmis 
--without-system-libwpd --without-system-cppunit --without-system-libwps 
--without-system-libwpg --without-system-graphite 
--without-system-sampleicc --without-system-redland 
--without-system-hunspell --without-system-mythes 
--without-system-altlinuxhyph --without-system-lpsolve 
--without-system-libexttextcat --without-system-poppler 
--enable-headless --disable-postgresql-sdbc

hth

--
Riccardo Magliocchetti

commit 2f8c941f2ddb817ca20b5710a1e1b2bbbc5bd7c3
Author: Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com>
Date:   Wed Jan 25 10:22:02 2012 +0100

    Build hacks #1
    
    Add --enable-headless to try reduce dependencies

diff --git a/configure.in b/configure.in
index 9a348e3..1fc0b0f 100644
--- a/configure.in
+++ b/configure.in
@@ -723,6 +723,11 @@ AC_ARG_ENABLE(kde4,
          both KDE3 and KDE4.]),
 ,)
 
+AC_ARG_ENABLE(headless,
+    AS_HELP_STRING([--enable-headless],
+        [Disable building of GUIs to reduce dependencies. Useful for server usage.]),
+,)
+
 AC_ARG_ENABLE(unix-qstart-libpng,
     AS_HELP_STRING([--disable-unix-qstart-libpng],
         [On UNIX systems, we have a faster splash app, that can use libpng to
@@ -2935,6 +2940,11 @@ solaris*)
     ;;
 esac
 
+if test "$enable_headless" = "yes"; then
+    GUI=headless
+    GUIBASE=headless
+fi
+
 INPATH=${OUTPATH}${PROEXT}
 AC_SUBST(COM)
 AC_SUBST(CPU)
@@ -7100,10 +7110,14 @@ AC_SUBST(ENABLE_NSPLUGIN)
 dnl ***************************************
 dnl testing for X libraries and includes...
 dnl ***************************************
+WANT_X11="no"
+if test "$_os" != "WINNT" -a "$_os" != "Android" -a "$_os" != "iOS" -a "$enable_headless" != 
"yes"; then
+    WANT_X11="yes"
+fi
 if test "$_os" = "Darwin" -a "x$x_includes" = "xno_x_includes"; then
     dnl Mac OS X using Aqua graphics. Don't check for X11.
     :
-elif test "$_os" != "WINNT" -a "$_os" != "Android" -a "$_os" != "iOS"; then
+elif test WANT_X11 = "yes"; then
     AC_PATH_X
     AC_PATH_XTRA
     CPPFLAGS="$CPPFLAGS $X_CFLAGS"
@@ -7150,7 +7164,7 @@ else
 fi
 AC_SUBST(XLIB)
 
-if test "$_os" != "WINNT" -a "$_os" != "Darwin" -a "$_os" != "Android" -a "$_os" != "iOS"; then
+if test WANT_X11 = "yes" -a "$_os" != "Darwin"; then
     dnl ===================================================================
     dnl Check for Composite.h for Mozilla plugin
     dnl ===================================================================
@@ -7170,7 +7184,7 @@ dnl ===================================================================
 dnl Check for system Xrender
 dnl ===================================================================
 AC_MSG_CHECKING([whether to use Xrender])
-if test "$test_xrender" = "yes"; then
+if test WANT_X11 = "yes" -a  "$test_xrender" = "yes"; then
     AC_MSG_RESULT([yes])
     AC_CHECK_LIB(Xrender, XRenderQueryVersion, [],
       [AC_MSG_ERROR(libXrender not found or functional)], [])
@@ -7188,7 +7202,7 @@ dnl ===================================================================
 dnl Check for XRandr
 dnl ===================================================================
 AC_MSG_CHECKING([whether to enable RandR support])
-if test "$test_randr" = "yes" -a \( "$enable_randr" = "yes" -o "$enable_randr" = "TRUE" \) ; then
+if test WANT_X11 = "yes" -a "$test_randr" = "yes" -a \( "$enable_randr" = "yes" -o "$enable_randr" 
= "TRUE" \) ; then
     if test -z "$enable_randr_link" -o "$enable_randr_link" = "no"; then
         XRANDR_DLOPEN="TRUE"
         AC_MSG_RESULT([configured to dlopen libXrandr at runtime])
@@ -7801,6 +7815,23 @@ if test "x$enable_kde4" = "xyes"; then
 fi
 AC_SUBST(ENABLE_KDE4)
 
+ENABLE_HEADLESS=""
+if test "x$enable_headless" = "xyes"; then
+    ENABLE_HEADLESS="TRUE"
+    R="headless"
+    # be sure to do not mess with uneeded stuff
+    test_randr=no
+    test_xrender=no
+    test_cups=no
+    test_fontconfig=yes
+    test_gtk=no
+    build_gstreamer=no
+    test_kde=no
+    test_kde4=no
+    test_unix_quickstarter=no
+fi
+AC_SUBST(ENABLE_HEADLESS)
+
 if test -z "$R"; then
     AC_MSG_RESULT([none])
 else
diff --git a/vcl/Module_vcl.mk b/vcl/Module_vcl.mk
index 47da575..36e8c2c 100644
--- a/vcl/Module_vcl.mk
+++ b/vcl/Module_vcl.mk
@@ -67,6 +67,12 @@ $(eval $(call gb_Module_add_targets,vcl,\
 endif
 endif
 
+ifneq ($(ENABLE_HEADLESS),)
+$(eval $(call gb_Module_add_targets,vcl,\
+    Library_vclplug_svp \
+))
+endif
+
 ifeq ($(GUIBASE),aqua)
 $(eval $(call gb_Module_add_targets,vcl,\
     Package_osx \