Split spl-build.m4

[mirror_spl.git] / config / kernel-trim-unused-symbols.m4

diff --git a/config/kernel-trim-unused-symbols.m4 b/config/kernel-trim-unused-symbols.m4
new file mode 100644 (file)
index 0000000..d1ac2f3
--- /dev/null
+++ b/config/kernel-trim-unused-symbols.m4
@@ -0,0 +1,19 @@
+dnl #
+dnl # config trim unused symbols,
+dnl # Verify the kernel has CONFIG_TRIM_UNUSED_KSYMS DISABLED.
+dnl #
+AC_DEFUN([SPL_AC_CONFIG_TRIM_UNUSED_KSYMS], [
+       AC_MSG_CHECKING([whether CONFIG_TRIM_UNUSED_KSYM is disabled])
+       SPL_LINUX_TRY_COMPILE([
+               #if defined(CONFIG_TRIM_UNUSED_KSYMS)
+               #error CONFIG_TRIM_UNUSED_KSYMS not defined
+               #endif
+       ],[ ],[
+               AC_MSG_RESULT([yes])
+       ],[
+               AC_MSG_RESULT([no])
+               AC_MSG_ERROR([
+       *** This kernel has unused symbols trimming enabled, please disable.
+       *** Rebuild the kernel with CONFIG_TRIM_UNUSED_KSYMS=n set.])
+       ])
+])