-dnl #
-dnl # Detect name used for the additional 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_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
- AC_ARG_WITH([spl-timeout],
- AS_HELP_STRING([--with-spl-timeout=SECS],
- [Wait SECS for symvers file to appear @<:@default=0@:>@]),
- [timeout="$withval"], [timeout=0])
-
- 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)
-])