[tracker: 1/2] build: add support for sqlite3_has_fts5 property.

[Sam Thursfield <sthursfield src gnome org>]

commit 1b14e36cc5ddd4f8734c76c6f238cd50a3d87756
Author: maxice8 <thinkabit ukim gmail com>
Date:   Thu Feb 21 07:01:21 2019 -0300

    build: add support for sqlite3_has_fts5 property.
    
    Allows distros that are cross compiling to tell tracker whether
    sqlite3 has FTS support builtin or not.

 meson.build | 74 ++++++++++++++++++++++++++++++++++++-------------------------
 1 file changed, 44 insertions(+), 30 deletions(-)
---
diff --git a/meson.build b/meson.build
index 3794b1142..3ea724e08 100644
--- a/meson.build
+++ b/meson.build
@@ -88,42 +88,56 @@ have_libstemmer = libstemmer.found()
 ##################################################################
 
 if enable_fts
-  sqlite3_builtin_fts5_test = '''
-    #include <sqlite3.h>
-
-    int main (int argc, char *argv[]) {
-      sqlite3 *db;
-      int rc;
-      rc = sqlite3_open(":memory:", &db);
-      if (rc!=SQLITE_OK) return -1;
-      rc = sqlite3_exec(db, "create table a(text)", 0, 0, 0);
-      if (rc!=SQLITE_OK) return -1;
-      rc = sqlite3_exec(db, "create virtual table t using fts5(content='a',text)", 0, 0, 0);
-      if (rc!=SQLITE_OK) return -1;
-    }
-  '''
-
-  result = cc.run(sqlite3_builtin_fts5_test,
-    name: 'sqlite3 has builtin FTS5 module',
-    dependencies: sqlite)
-
-  if not result.compiled()
-    error('Failed to compile SQLite FTS test.')
-  endif
-
-  if result.returncode() == 0
-    message('Using sqlite3 builtin FTS module')
-    sqlite3_has_builtin_fts5 = true
+  if meson.is_cross_build() and not meson.has_exe_wrapper()
+    sqlite3_fts5 = meson.get_cross_property('sqlite3_has_fts5')
+       if sqlite3_fts5 == ''
+         error('Please assign an appropriate value for sqlite3_has_fts5 in the [properties] section of your 
crossfile')
+    elif sqlite3_fts5 == 'true'
+         sqlite3_has_builtin_fts5 = true
+    elif sqlite3_fts5 == 'false'
+         sqlite3_has_builtin_fts5 = false
+    else
+               error('Invalid value of sqlite3_has_fts5 property, use \'true\' or \'false\'')
+    endif
   else
-    message('FTS support was enabled but SQLite doesn\'t have the FTS module built in')
-    if sqlite.version().version_compare('>= 3.20.0')
-      error('sqlite3 >= 3.20.0 must be compiled with --enable-fts5 in order to get FTS support.')
+    sqlite3_builtin_fts5_test = '''
+      #include <sqlite3.h>
+
+      int main (int argc, char *argv[]) {
+        sqlite3 *db;
+        int rc;
+        rc = sqlite3_open(":memory:", &db);
+        if (rc!=SQLITE_OK) return -1;
+        rc = sqlite3_exec(db, "create table a(text)", 0, 0, 0);
+        if (rc!=SQLITE_OK) return -1;
+        rc = sqlite3_exec(db, "create virtual table t using fts5(content='a',text)", 0, 0, 0);
+        if (rc!=SQLITE_OK) return -1;
+      }
+    '''
+
+    result = cc.run(sqlite3_builtin_fts5_test,
+      name: 'sqlite3 has builtin FTS5 module',
+      dependencies: sqlite)
+
+    if not result.compiled()
+      error('Failed to compile SQLite FTS test.')
+    endif
+
+    if result.returncode() == 0
+      sqlite3_has_builtin_fts5 = true
     else
-      message('sqlite3 is older than version 3.20.0, using FTS module that is bundled with Tracker')
       sqlite3_has_builtin_fts5 = false
     endif
   endif
 
+  if sqlite3_has_builtin_fts5
+    message('Using sqlite3 builtin FTS module')
+  elif sqlite.version().version_compare('>= 3.20.0')
+    error('FTS support was enabled but SQLite doesn\'t have the FTS module built in')
+  else
+    message('sqlite3 is older than version 3.20.0, using FTS module that is bundled with Tracker')
+  endif
+
 else
   sqlite3_has_builtin_fts5 = false
 endif