+ dnl #
+ dnl # Detect the name used for the SPL Module.symvers file. If one
+ dnl # does not exist this is likely because the SPL has been configured
+ dnl # but not built. The '--with-spl-timeout' option can be passed
+ dnl # to pause here, waiting for the file to appear from a concurrently
+ dnl # building SPL package. If the file does not appear in time, a good
+ dnl # guess is made as to what this file will be named based on what it
+ dnl # is named in the kernel build products. This file will first be
+ dnl # used at link time so if the guess is wrong the build will fail
+ dnl # then. This unfortunately means the ZFS package does not contain a
+ dnl # reliable mechanism to detect symbols exported by the SPL at
+ dnl # configure time.
+ dnl #
+ AC_MSG_CHECKING([spl file name for module symbols])
+ SPL_SYMBOLS=NONE
+
+ while true; do
+ AS_IF([test -r $SPL_OBJ/Module.symvers], [
+ SPL_SYMBOLS=Module.symvers
+ ], [test -r $SPL_OBJ/Modules.symvers], [
+ SPL_SYMBOLS=Modules.symvers
+ ], [test -r $SPL_OBJ/module/Module.symvers], [
+ SPL_SYMBOLS=Module.symvers
+ ], [test -r $SPL_OBJ/module/Modules.symvers], [
+ SPL_SYMBOLS=Modules.symvers
+ ])
+
+ AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
+ break;
+ ], [
+ sleep 1
+ timeout=$((timeout-1))
+ ])
+ done
+
+ AS_IF([test "$SPL_SYMBOLS" = NONE], [
+ SPL_SYMBOLS=$LINUX_SYMBOLS
+ ])
+
+ AC_MSG_RESULT([$SPL_SYMBOLS])
+ AC_SUBST(SPL_SYMBOLS)
+])
+
+dnl #
+dnl # Basic toolchain sanity check.
+dnl #
+AC_DEFUN([ZFS_AC_TEST_MODULE],
+ [AC_MSG_CHECKING([whether modules can be built])
+ ZFS_LINUX_TRY_COMPILE([],[],[
+ AC_MSG_RESULT([yes])
+ ],[
+ AC_MSG_RESULT([no])
+ if test "x$enable_linux_builtin" != xyes; then
+ AC_MSG_ERROR([*** Unable to build an empty module.])
+ else
+ AC_MSG_ERROR([
+ *** Unable to build an empty module.
+ *** Please run 'make scripts' inside the kernel source tree.])
+ fi
+ ])