configure: add --enable-shared-sqlite option

When --enable-shared-sqlite is used, charybdis will be compiled with a shared
sqlite library if it is available.

bandb/Makefile.in

@@ -29,9 +29,10 @@ PACKAGE_TARNAME = @PACKAGE_TARNAME@
 
 PROGRAM_PREFIX   = @PROGRAM_PREFIX@
 
+SQLITE_LIB	= @SQLITE_LD@
 ZIP_LIB		= @ZLIB_LD@
 
-IRCDLIBS	= @MODULES_LIBS@ -L../libratbox/src/.libs -lratbox @LIBS@ $(SSL_LIBS) $(ZIP_LIB)
+IRCDLIBS	= @MODULES_LIBS@ -L../libratbox/src/.libs -lratbox @LIBS@ $(SSL_LIBS) $(ZIP_LIB) $(SQLITE_LIB)
 
 INCLUDES        = -I. -I../include -I../libratbox/include $(SSL_INCLUDES)
 CPPFLAGS        = ${INCLUDES} @CPPFLAGS@
@@ -45,16 +46,22 @@ PROGS		= $(pkglibexec_PROGS) $(bin_PROGS)
 BANDB_SOURCES =     \
   bandb.c	\
   rsdb_snprintf.c \
-  rsdb_sqlite3.c \
+  rsdb_sqlite3.c
-  sqlite3.c
+
+ifndef SQLITE_LIB
+	BANDB_SOURCES+=sqlite3.c
+endif
 
 BANDB_OBJECTS = ${BANDB_SOURCES:.c=.o}
 
 BANTOOL_SOURCES =     \
   bantool.c	\
   rsdb_snprintf.c \
-  rsdb_sqlite3.c \
+  rsdb_sqlite3.c
-  sqlite3.c
+
+ifndef SQLITE_LIB
+	BANTOOL_SOURCES+=sqlite3.c
+endif
 
 BANTOOL_OBJECTS = ${BANTOOL_SOURCES:.c=.o}
 

configure

@@ -642,6 +642,7 @@ HELP_DIR
 logdir
 LOG_DIR
 ETC_DIR
+SQLITE_LD
 ZLIB_LD
 ENCSPEED
 ALLOCA
@@ -732,6 +733,7 @@ enable_ipv6
 enable_openssl
 with_zlib_path
 enable_zlib
+enable_shared_sqlite
 enable_ports
 enable_poll
 enable_select
@@ -1379,6 +1381,7 @@ Optional Features:
   --enable-openssl=DIR    Enable OpenSSL support (DIR optional).
   --disable-openssl       Disable OpenSSL support.
   --disable-zlib          Disable ziplinks support
+  --enable-shared-sqlite  Use shared sqlite
   --enable-ports          Force solaris I/O ports subsystem usage.
   --enable-poll           Force poll() usage.
   --enable-select         Force select() usage.
@@ -7242,6 +7245,73 @@ fi
 
 
 
+fi
+
+# Check whether --enable-shared-sqlite was given.
+if test "${enable_shared_sqlite+set}" = set; then :
+  enableval=$enable_shared_sqlite; shared_sqlite=$enableval
+else
+  shared_sqlite=no
+fi
+
+
+if test "$shared_sqlite" = yes; then
+
+ac_fn_c_check_header_mongrel "$LINENO" "sqlite3.h" "ac_cv_header_sqlite3_h" "$ac_includes_default"
+if test "x$ac_cv_header_sqlite3_h" = xyes; then :
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for sqlite3_open in -lsqlite3" >&5
+$as_echo_n "checking for sqlite3_open in -lsqlite3... " >&6; }
+if ${ac_cv_lib_sqlite3_sqlite3_open+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsqlite3  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char sqlite3_open ();
+int
+main ()
+{
+return sqlite3_open ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_sqlite3_sqlite3_open=yes
+else
+  ac_cv_lib_sqlite3_sqlite3_open=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_sqlite3_sqlite3_open" >&5
+$as_echo "$ac_cv_lib_sqlite3_sqlite3_open" >&6; }
+if test "x$ac_cv_lib_sqlite3_sqlite3_open" = xyes; then :
+
+        SQLITE_LD=-lsqlite3
+
+
+else
+  shared_sqlite=no
+fi
+
+
+else
+  shared_sqlite=no
+fi
+
+
+
 fi
 
 

configure.ac

@@ -564,6 +564,21 @@ AC_CHECK_HEADER(zlib.h, [
 
 fi
 
+AC_ARG_ENABLE(shared-sqlite,
+AC_HELP_STRING([--enable-shared-sqlite],[Use shared sqlite]),
+[shared_sqlite=$enableval],[shared_sqlite=no])
+
+if test "$shared_sqlite" = yes; then
+
+AC_CHECK_HEADER(sqlite3.h, [
+    AC_CHECK_LIB(sqlite3, sqlite3_open,
+    [
+        AC_SUBST(SQLITE_LD, -lsqlite3)
+    ], shared_sqlite=no)
+], shared_sqlite=no)
+
+fi
+
 dnl IO Loop Selection
 dnl =================