svn commit: r327702 - projects/clang600-import/usr.sbin/acpi/acpidb

[Dimitry Andric]

Author: dim
Date: Mon Jan  8 18:42:40 2018
New Revision: 327702
URL: https://svnweb.freebsd.org/changeset/base/327702

Log:
  Add explanatory comment for r327622: clang 6.0.0 and higher warn about
  the ACPI_ROOT_OBJECT and ACPI_TO_POINTER macros from acpica's actypes.h
  header, that they use arithmetic on a null pointer treated as a cast
  from integer to pointer, which is a GNU extension.  We turn off the
  warning, because this is in contributed code.
  
  Requested by:	rakuco

Modified:
  projects/clang600-import/usr.sbin/acpi/acpidb/Makefile

Modified: projects/clang600-import/usr.sbin/acpi/acpidb/Makefile
==============================================================================
--- projects/clang600-import/usr.sbin/acpi/acpidb/Makefile	Mon Jan  8 16:36:33 2018	(r327701)
+++ projects/clang600-import/usr.sbin/acpi/acpidb/Makefile	Mon Jan  8 18:42:40 2018	(r327702)
@@ -81,6 +81,12 @@ LIBADD=	pthread
 
 .include <bsd.prog.mk>
 
+# clang 6.0.0 and higher warn about the ACPI_ROOT_OBJECT and
+# ACPI_TO_POINTER macros from sys/contrib/dev/acpica/include/actypes.h,
+# that they use arithmetic on a null pointer treated as a cast from
+# integer to pointer, which is a GNU extension.
+#
+# Turn off the warning, because this is in contributed code.
 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 60000
 CWARNFLAGS+=	-Wno-null-pointer-arithmetic
 .endif