[almanah/wip/gcr4] build: Build with gcr4 by default

[Milan Crha <mcrha src gnome org>]

commit cd44b476f4ffbf37c5d5f5b996ecd711db925576
Author: Milan Crha <mcrha redhat com>
Date:   Tue Jul 19 21:25:45 2022 +0200

    build: Build with gcr4 by default
    
    Use -Dgcr3=true to build against gcr3 instead.
    
    The gcr4 is going to replace gcr3, this change prepares it to do.
    it also defaults to build with gcr4 for the same reason.

 meson.build       | 10 +++++++++-
 meson_options.txt |  1 +
 src/vfs.c         |  4 ++++
 3 files changed, 14 insertions(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 813e67b..b418dce 100644
--- a/meson.build
+++ b/meson.build
@@ -35,9 +35,14 @@ gtksourceview = dependency('gtksourceview-3.0')
 sqlite = dependency('sqlite3')
 cairo = dependency('cairo')
 atk = dependency('atk')
-gcr = dependency('gcr-base-3')
 cryptui = dependency('cryptui-0.0')
 
+if get_option('gcr3')
+  gcr = dependency('gcr-base-3')
+else
+  gcr = dependency('gcr-4', version: '>= 3.90.0')
+endif
+
 # Options
 evolution_support = get_option('evolution')
 spell_checking_support = get_option('spell_checking')
@@ -94,6 +99,9 @@ if have_evolution
   # https://gitlab.gnome.org/GNOME/almanah/issues/1
   #conf.set('EDS_DISABLE_DEPRECATED', 1)
 endif
+if get_option('gcr3')
+  conf.set('HAVE_GCR3', 1)
+endif
 
 config = vcs_tag(
   input: configure_file(
diff --git a/meson_options.txt b/meson_options.txt
index 85a6860..0c7af1d 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,2 +1,3 @@
 option('evolution', type: 'feature', value: 'enabled', description: 'Enable Evolution calendar integration')
 option('spell_checking', type: 'feature', value: 'enabled', description: 'Enable spell checking support')
+option('gcr3', type: 'boolean', value: false, description: 'Build with gcr3; if false, builds with gcr4')
diff --git a/src/vfs.c b/src/vfs.c
index fdc9beb..da238e6 100644
--- a/src/vfs.c
+++ b/src/vfs.c
@@ -44,7 +44,11 @@
 #include <fcntl.h>
 
 #define GCR_API_SUBJECT_TO_CHANGE
+#ifdef HAVE_GCR3
 #include <gcr/gcr-base.h>
+#else
+#include <gcr/gcr.h>
+#endif
 #include <gio/gio.h>
 #include <glib.h>
 #include <glib/gi18n.h>