[evolution-activesync] autotools: avoid hard dependency on Evolution dev files

[Patrick Ohly <pohly src gnome org>]

commit 4d469b9ab97a3661260f45ce100b4cd8ef68f2a9
Author: Patrick Ohly <patrick ohly intel com>
Date:   Mon Jul 14 16:22:31 2014 +0200

    autotools: avoid hard dependency on Evolution dev files
    
    PKG_CHECK_MODULES() aborted when it didn't find some .pc files, even
    if those files where not needed at all because the feature depending
    on them was disabled.
    
    Now the files are checked and the result is remembered instead of
    aborting. Then the feature check for eplugin is enabled by default
    only if found, and fails hard if enabled explicitly without the .pc.
    
    The feature check for camel should be updated separately, taking into
    account/fixing that it no longer compiles with libcamel from EDS 3.12.
    
    Compilation with EDS 3.12 works with --disable-camel-backend
    --disable-qtconfig --disable-eplugin.

 configure.ac |   27 ++++++++++++++++-----------
 1 files changed, 16 insertions(+), 11 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index fdbe669..ab5f2b4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -69,15 +69,15 @@ CAMEL_PKG="camel-1.2"
 
 PKG_CHECK_MODULES(CAMEL, ${CAMEL_PKG})
 
-PKG_CHECK_MODULES(EVOLUTION_PLUGIN, evolution-plugin${EVO_PKG})
+PKG_CHECK_MODULES(EVOLUTION_PLUGIN, evolution-plugin${EVO_PKG}, [have_e_plugin=yes], [have_eplugin=no])
 AC_SUBST(EVOLUTION_PLUGIN_CFLAGS)
 AC_SUBST(EVOLUTION_PLUGIN_LIBS)
 
-PKG_CHECK_MODULES(EVOLUTION_MAIL, evolution-mail${EVO_PKG})
+PKG_CHECK_MODULES(EVOLUTION_MAIL, evolution-mail${EVO_PKG}, [have_e_mail=yes], [have_e_mail=no])
 AC_SUBST(EVOLUTION_MAIL_CFLAGS)
 AC_SUBST(EVOLUTION_MAIL_LIBS)
 
-PKG_CHECK_MODULES(EVOLUTION_SHELL, evolution-shell${EVO_PKG})
+PKG_CHECK_MODULES(EVOLUTION_SHELL, evolution-shell${EVO_PKG}, [have_e_shell=yes], [have_e_shell=no])
 AC_SUBST(EVOLUTION_SHELL_CFLAGS)
 AC_SUBST(EVOLUTION_SHELL_LIBS)
 
@@ -89,18 +89,21 @@ PKG_CHECK_MODULES([MLITE],
                  [have_mlite="no"
                    AC_MSG_NOTICE([MeeGo ActiveSync Settings UI will not be built])])
 
-
 camel_providerdir=`$PKG_CONFIG --variable=camel_providerdir ${CAMEL_PKG}`
 AC_SUBST(camel_providerdir)
 
-plugindir="`$PKG_CONFIG --variable=plugindir evolution-plugin${EVO_PKG}`"
-AC_SUBST(plugindir)
+if test "$have_e_plugin" = "yes"; then
+   plugindir="`$PKG_CONFIG --variable=plugindir evolution-plugin${EVO_PKG}`"
+   AC_SUBST(plugindir)
 
-EVOLUTION_PLUGIN_errordir="`$PKG_CONFIG --variable=errordir evolution-plugin`"
-AC_SUBST(EVOLUTION_PLUGIN_errordir)
+   EVOLUTION_PLUGIN_errordir="`$PKG_CONFIG --variable=errordir evolution-plugin`"
+   AC_SUBST(EVOLUTION_PLUGIN_errordir)
+fi
 
-EVOLUTION_imagesdir="`$PKG_CONFIG --variable=imagesdir evolution-shell`"
-AC_SUBST(EVOLUTION_imagesdir)
+if test "$have_e_shell" = "yes"; then
+   EVOLUTION_imagesdir="`$PKG_CONFIG --variable=imagesdir evolution-shell`"
+   AC_SUBST(EVOLUTION_imagesdir)
+fi
 
 EVOLUTION_privlibdir=`$PKG_CONFIG --variable=privlibdir evolution-data-server-1.2`
 AC_SUBST(EVOLUTION_privlibdir)
@@ -136,7 +139,9 @@ AM_CONDITIONAL([ENABLE_CAMEL_BACKEND], [test "$enable_camel" = "yes"])
 AC_ARG_ENABLE(eplugin,
               AS_HELP_STRING([--disable-eplugin],
                              [Can be used to disable compiling the Evolution config plugin. Enabled by 
default.]),
-              [enable_eplugin="$enableval"], [enable_eplugin="yes"])
+              [enable_eplugin="$enableval"
+               test "$enable_eplugin" = "no" || test "$have_e_plugin" = "yes" || 
AC_MSG_ERROR([evolution-plugin${EVO_PKG} not available, cannot enable eplugin])],
+              [enable_eplugin="$have_e_plugin"])
 AM_CONDITIONAL([ENABLE_EPLUGIN], [test "$enable_eplugin" = "yes"])
 
 AS_AC_EXPAND(LIBEXECDIR, $libexecdir)