On 2013-05-15 15:04, Brooks Davis wrote:
Author: brooks
Date: Wed May 15 13:04:10 2013
New Revision: 250658
URL: http://svnweb.freebsd.org/changeset/base/250658
Log:
Add a new option WITHOUT_FORMAT_EXTENSIONS to disable flags related to
checking our kernel printf extensions. This is useful to allow
compilers without these extensions to build kernels.
As I have written before, please let us consider this to be a band-aid,
and aim to remove non-standard printf specifiers from our kernel
sources. Otherwise we will lose most of the advantages of format
checking... :-(
--- head/share/mk/bsd.own.mk Wed May 15 08:38:49 2013 (r250657)
+++ head/share/mk/bsd.own.mk Wed May 15 13:04:10 2013 (r250658)
@@ -268,6 +268,7 @@ __DEFAULT_YES_OPTIONS = \
ED_CRYPTO \
EXAMPLES \
FLOPPY \
+ FORMAT_EXTENSIONS \
Spelled as 'extensions' here...
Modified: head/sys/conf/kern.mk
==============================================================================
--- head/sys/conf/kern.mk Wed May 15 08:38:49 2013 (r250657)
+++ head/sys/conf/kern.mk Wed May 15 13:04:10 2013 (r250658)
@@ -5,7 +5,7 @@
#
CWARNFLAGS?= -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes \
-Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual \
- -Wundef -Wno-pointer-sign -fformat-extensions \
+ -Wundef -Wno-pointer-sign ${FORMAT_EXTENTIONS} \
...but as 'extentions' here...
+# External compilers may not support our format extensions. Allow them
+# to be disabled. WARNING: format checking is disabled in this case.
+.if ${MK_FORMAT_EXTENSIONS} == "no"
+NO_WFORMAT= -Wno-format
+.else
+FORMAT_EXTENTIONS= -fformat-extensions
and here.
-Dimitry
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