[banshee/stable-2.6] build: make GIO backend be enabled by default (bgo#686584)

[Andrés Aragoneses <aaragoneses src gnome org>]

commit c05a86820a2d5fff4940e368187011a70ef70ffd
Author: Andres G. Aragoneses <knocte gmail com>
Date:   Mon Dec 10 23:14:17 2012 +0000

    build: make GIO backend be enabled by default (bgo#686584)
    
    Other IO backends were deprecated some time ago, so now the only option
    is Gio. Before this happened, the backend to build was guessed at config
    time by our M4 macros.
    
    Problem is, if dependencies for GIO were not met, the default was to
    silently not build any IO backend, which makes Banshee lacks lots of
    useful features.
    
    This commit changes this so it is now mandatory to pass the --disable-gio
    flag if the user wishes to compile without any IO backend.
    
    It doesn't completely solve bgo#686584 but helps alleviate the problem.
    And has the added benefit of making more versions of dependencies be
    clearly visible at the top of the macro.

 build/m4/banshee/gio.m4 |   21 ++++++++++++++++-----
 1 files changed, 16 insertions(+), 5 deletions(-)
---
diff --git a/build/m4/banshee/gio.m4 b/build/m4/banshee/gio.m4
index 269517a..dd522ed 100644
--- a/build/m4/banshee/gio.m4
+++ b/build/m4/banshee/gio.m4
@@ -1,18 +1,29 @@
 AC_DEFUN([BANSHEE_CHECK_GIO_SHARP],
 [
        GNOMESHARP_REQUIRED=2.8
+       GIOSHARP_REQUIRED=2.22.3
        
        AC_ARG_ENABLE(gio, AC_HELP_STRING([--disable-gio], [Disable GIO for IO operations]), 
,enable_gio="yes")
        AC_ARG_ENABLE(gio_hardware, AC_HELP_STRING([--disable-gio-hardware], [Disable GIO Hardware backend]), 
,enable_gio_hardware="yes")
        
        if test "x$enable_gio" = "xyes"; then
+
+               has_gtk_beans=no
                PKG_CHECK_MODULES(GTKSHARP_BEANS,
                        gtk-sharp-beans-2.0 >= $GNOMESHARP_REQUIRED,
-                       enable_gio=yes, enable_gio=no)
+                       has_gtk_beans=yes, has_gtk_beans=no)
+
+               if test "x$has_gtk_beans" = "xno"; then
+                       AC_MSG_ERROR([gtk-sharp-beans-2.0 was not found or is not up to date. Please install 
gtk-sharp-beans-2.0 of at least version $GNOMESHARP_REQUIRED, or disable GIO support by passing 
--disable-gio])
+               fi
 
+               has_gio_sharp=no
                PKG_CHECK_MODULES(GIOSHARP,
-                       gio-sharp-2.0 >= 2.22.3,
-                       enable_gio="$enable_gio", enable_gio=no)
+                       gio-sharp-2.0 >= $GIOSHARP_REQUIRED,
+                       has_gio_sharp=yes, has_gio_sharp=no)
+               if test "x$has_gio_sharp" = "xno"; then
+                       AC_MSG_ERROR([gio-sharp-2.0 was not found or is not up to date. Please install 
gio-sharp-2.0 of at least version $GIOSHARP_REQUIRED, or disable GIO support by passing --disable-gio])
+               fi
 
                asms="`$PKG_CONFIG --variable=Libraries gio-sharp-2.0` `$PKG_CONFIG --variable=Libraries 
gtk-sharp-beans-2.0`"
                for asm in $asms; do
@@ -33,7 +44,7 @@ AC_DEFUN([BANSHEE_CHECK_GIO_SHARP],
                if test "x$enable_gio_hardware" = "xyes"; then
                        PKG_CHECK_MODULES(GUDEV_SHARP,
                                gudev-sharp-1.0 >= 0.1,
-                               enable_gio_hardware="$enable_gio", enable_gio_hardware=no)
+                               enable_gio_hardware=yes, enable_gio_hardware=no)
 
                        PKG_CHECK_MODULES(GKEYFILE_SHARP,
                                gkeyfile-sharp >= 0.1,
@@ -45,7 +56,7 @@ AC_DEFUN([BANSHEE_CHECK_GIO_SHARP],
                        fi
                fi
 
-               AM_CONDITIONAL(ENABLE_GIO, test "x$enable_gio" = "xyes")
+               AM_CONDITIONAL(ENABLE_GIO, true)
                AM_CONDITIONAL(ENABLE_GIO_HARDWARE, test "x$enable_gio_hardware" = "xyes")
        else
                enable_gio_hardware="no"