build: Allow building without SQLlite support.
* configure.ac: Add option --dsiable-tofu and --disable-sqlite. (NEED_SQLITE_VERSION): New var. (USE_TOFU): New ac_define and am_conditional. * autogen.sh (build-w32): Add PKG_CONFIG_LIBDIR to configure so that pkg-config find the correct .pc file. * g10/Makefile.am (tofu_source): New. Build only if enabled. * g10/gpg.c (parse_trust_model)[!USE_TOFU]: Disable tofu models. (parse_tofu_policy)[!USE_TOFU]: Disable all. (parse_tofu_db_format)[!USE_TOFU]: Disable all. (main) <aTOFUPolicy>[!USE_TOFU]: Skip. * g10/keyedit.c (show_key_with_all_names_colon)[!USE_TOFU]: Do not call tofu functions. * g10/keylist.c (list_keyblock_colon)[!USE_TOFU]: Ditto. * g10/trustdb.c (tdb_get_validity_core)[!USE_TOFU]: Skip tofu processing.
This allows to build a minimal version of GnuPG. It is also currently
required to build for Windows.
- Signed-off-by: Werner Koch <wk@gnupg.org>