X-Git-Url: https://git.sommitrealweird.co.uk/onak.git/blobdiff_plain/d7d8ed7f193d8aa37b7c4450c033384b80a02942..0d2a5aeeb4120999afc79d06619d90e26e2fec5c:/configure.ac

diff --git a/configure.ac b/configure.ac
index d9712fa..bc93f4b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,48 +7,70 @@ AC_PROG_CC
 
 AC_C_BIGENDIAN
 
-AC_ARG_ENABLE(backend,AC_HELP_STRING([--enable-backend=<backend>],[Choose the backend database to use. Defaults to db4.]), [], [enable_backend="db4"])
+dnl We should always have these backends available.
+backends="file fs keyd"
 
-AC_ARG_ENABLE(keyd,AC_HELP_STRING([--enable-keyd],[Use keyd as the DB backend.]), [], [])
-
-AC_MSG_CHECKING([which key database backend to use])
-AC_MSG_RESULT([$enable_backend])
-AC_CHECK_FILE([$srcdir/keydb_$enable_backend.c], ,AC_MSG_ERROR([non existent key database backend $enable_backend]))
+AC_CHECK_LIB(pq, PQsetdbLogin,[have_libpq="yes" backends="$backends pg"],have_libpq="no")
 
-if test "x$enable_backend" = "xdb4"
-then
-	AC_CHECK_HEADER(db.h, have_db_h="yes", have_db_h="no")
-	AC_MSG_CHECKING(for libdb version in db.h)
-	printf "#include <db.h>\nDB_VERSION_MAJOR DB_VERSION_MINOR\n" >conftest.c
-	set `eval $ac_cpp conftest.c | egrep '^ *[[0-9]] *'`; v="$1"; vv="$2"
-	AC_MSG_RESULT($v.$vv)
-	if test "$v" -ne 4; then
-		AC_MSG_ERROR([   * onak requires libdb version 4])
-	fi
+AC_CHECK_HEADER(db.h, have_db_h="yes", have_db_h="no")
+AC_MSG_CHECKING(for libdb version in db.h)
+printf "#include <db.h>\nDB_VERSION_MAJOR DB_VERSION_MINOR\n" >conftest.c
+set `eval $ac_cpp conftest.c | egrep '^ *[[0-9]] *'`; v="$1"; vv="$2"
+AC_MSG_RESULT($v.$vv)
+if test "$v" -eq 4; then
 	for db in "db-$v.$vv" "db$v.$vv" "db-$v" "db$v" "db"; do
 		AC_MSG_CHECKING(for db_create in lib$db)
 		oldLIBS="$LIBS"
 		LIBS="$LIBS -l$db"
+		db4libs="-l$db"
 		AC_TRY_LINK([#include <db.h>], db_create(0, 0, 0),
 			have_libdb="yes", have_libdb="no")
 		AC_MSG_RESULT($have_libdb)
-		if test "$have_libdb" != "no"; then break; fi
 		LIBS="$oldLIBS"
+		if test "$have_libdb" != "no"; then break; fi
 	done
+fi
+if test "$have_libdb" = "yes" -a "$have_db_h" = "yes"; then
+	AC_DEFINE(HAVE_LIBDB4, 1, [libdb found])
+	backends="$backends db4"
+fi
+
+AC_MSG_CHECKING(available backends)
+AC_MSG_RESULT($backends)
+
+AC_ARG_ENABLE(backend,AC_HELP_STRING([--enable-backend=<backend>],[Choose the backend database to use. Defaults to dynamic.]), [], [enable_backend="dynamic"])
+
+AC_ARG_ENABLE(keyd,AC_HELP_STRING([--enable-keyd],[Use keyd as the DB backend.]), [], [])
+
+AC_MSG_CHECKING([which key database backend to use])
+AC_MSG_RESULT([$enable_backend])
+AC_CHECK_FILE([$srcdir/keydb_$enable_backend.c], ,AC_MSG_ERROR([non existent key database backend $enable_backend]))
+
+if test "x$enable_backend" = "xdb4"
+then
 	if test "$have_libdb" = "no" -o "$have_db_h" = "no"; then
 		AC_MSG_ERROR(libdb not found.)
 	fi
-	AC_DEFINE(HAVE_LIBDB, 1, [libdb found])
+	LIBS="$LIBS $db4libs"
 else if test "x$enable_backend" = "xpg"
 then
-	AC_CHECK_LIB(pq, PQsetdbLogin,,
-		AC_MSG_ERROR([cannot compile PostgreSQL backend without libpq]))
+	if test "$have_libpq" = "no"; then
+		AC_MSG_ERROR(libpq not found.)
+	fi
+	LIBS="$LIBS -lpq"
 fi
 fi
 
-AC_SUBST(DBTYPE, $enable_backend)
+dnl If we are explicitly told which backend to use, only build that one.
+if test "x$enable_backend" = "xdb4"
+then
+	backend="$enable_backend"
+fi
 
+AC_SUBST(DBTYPE, $enable_backend)
+AC_SUBST(DB4LIBS, $db4libs)
 AC_SUBST(KEYD, $enable_keyd)
+AC_SUBST(BACKENDS, $backends)
 
 AC_CONFIG_FILES(Makefile)