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.
Sponsored by: DARPA, AFRL
Added:
head/tools/build/options/WITHOUT_FORMAT_EXTENSIONS (contents, props changed)
Modified:
head/share/mk/bsd.own.mk
head/sys/conf/kern.mk
Modified: head/share/mk/bsd.own.mk
==============================================================================
--- 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 \
FORTH \
FP_LIBC \
FREEBSD_UPDATE \
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} \
-Wmissing-include-dirs -fdiagnostics-show-option \
${CWARNEXTRA}
#
@@ -29,7 +29,15 @@ NO_WSOMETIMES_UNINITIALIZED= -Wno-error-
# enough to error out the whole kernel build. Display them anyway, so there is
# some incentive to fix them eventually.
CWARNEXTRA?= -Wno-error-tautological-compare -Wno-error-empty-body \
- -Wno-error-parentheses-equality
+ -Wno-error-parentheses-equality ${NO_WFORMAT}
+.endif
+
+# 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
.endif
#
Added: head/tools/build/options/WITHOUT_FORMAT_EXTENSIONS
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/tools/build/options/WITHOUT_FORMAT_EXTENSIONS Wed May 15 13:04:10
2013 (r250658)
@@ -0,0 +1,5 @@
+.\" $FreeBSD$
+Set to not enable
+.Fl fformat-extensions
+when compiling the kernel.
+Also disables all format checking.
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