[PATCH] gnome3: prefer gcr-4

Newer distributions are now using gcr-4, while older ones will still have
gcr-3.  The APIs used by pinentry have not changed in between versions,
only the top-level header has changed.  Also, for gcr-3, only gcr-base-3
is required.

(I have attempted to sign up for a dev.gnupg.org account, but am still
awaiting verification.)

Signed-off-by: Yaakov Selkowitz <[email protected]>
---
 configure.ac             | 19 ++++++++++++++-----
 gnome3/pinentry-gnome3.c |  4 ++++
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/configure.ac b/configure.ac
index f9d090f..7dde8fb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -458,15 +458,24 @@ AM_CONDITIONAL(BUILD_PINENTRY_GTK_2, test "$pinentry_gtk_2" = "yes")
 if test "$pinentry_gnome_3" != "no"; then
 	PKG_CHECK_MODULES(
 		GNOME3,
-		[gcr-3,gcr-base-3],
+		[gcr-4],
 		[
 			pinentry_gnome_3=yes
 			AC_DEFINE(GCR_API_SUBJECT_TO_CHANGE, 1, [Nod nod])
+			AC_DEFINE(GCR_API_4, 1, [GCR API version])
 		],
-		[
-			AC_MSG_WARN([pkg-config could not find the module gcr-3,gcr-base-3])
-			pinentry_gnome_3=no
-		]
+		[PKG_CHECK_MODULES(
+			GNOME3,
+			[gcr-base-3],
+			[
+				pinentry_gnome_3=yes
+				AC_DEFINE(GCR_API_SUBJECT_TO_CHANGE, 1, [Nod nod])
+			],
+			[
+				AC_MSG_WARN([pkg-config could not find the module gcr-4 or gcr-base-3])
+				pinentry_gnome_3=no
+			]
+		)]
 	)
 fi
 
diff --git a/gnome3/pinentry-gnome3.c b/gnome3/pinentry-gnome3.c
index 8a8fbed..7f21d6f 100644
--- a/gnome3/pinentry-gnome3.c
+++ b/gnome3/pinentry-gnome3.c
@@ -23,7 +23,11 @@
 # include "config.h"
 #endif
 
+#ifdef GCR_API_4
+#include <gcr/gcr.h>
+#else
 #include <gcr/gcr-base.h>
+#endif
 
 #include <string.h>
 #include <stdlib.h>
-- 
2.44.0