svn commit: r359691 - head/sys/conf
Brooks Davis
brooks at FreeBSD.org
Tue Apr 7 15:32:08 UTC 2020
Author: brooks
Date: Tue Apr 7 15:32:08 2020
New Revision: 359691
URL: https://svnweb.freebsd.org/changeset/base/359691
Log:
Allow the kernel to build with a compiler that sets -fno-common.
The mechanism that generates assym.inc and offset.inc depends on the
symbols in question being common. For now, simply force the object files
to be created with -fcommon.
-fno-common will be the default in GCC10/LLVM11.
Submitted by: arichardson
Reviewed by: kevans
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D24322
Modified:
head/sys/conf/kern.post.mk
Modified: head/sys/conf/kern.post.mk
==============================================================================
--- head/sys/conf/kern.post.mk Tue Apr 7 15:10:04 2020 (r359690)
+++ head/sys/conf/kern.post.mk Tue Apr 7 15:32:08 2020 (r359691)
@@ -235,20 +235,20 @@ offset.inc: $S/kern/genoffset.sh genoffset.o
NM='${NM}' NMFLAGS='${NMFLAGS}' sh $S/kern/genoffset.sh genoffset.o > ${.TARGET}
genoffset.o: $S/kern/genoffset.c
- ${CC} -c ${CFLAGS:N-flto:N-fno-common} $S/kern/genoffset.c
+ ${CC} -c ${CFLAGS:N-flto:N-fno-common} -fcommon $S/kern/genoffset.c
# genoffset_test.o is not actually used for anything - the point of compiling it
# is to exercise the CTASSERT that checks that the offsets in the offset.inc
# _lite struct(s) match those in the original(s).
genoffset_test.o: $S/kern/genoffset.c offset.inc
- ${CC} -c ${CFLAGS:N-flto:N-fno-common} -DOFFSET_TEST \
+ ${CC} -c ${CFLAGS:N-flto:N-fno-common} -fcommon -DOFFSET_TEST \
$S/kern/genoffset.c -o ${.TARGET}
assym.inc: $S/kern/genassym.sh genassym.o genoffset_test.o
NM='${NM}' NMFLAGS='${NMFLAGS}' sh $S/kern/genassym.sh genassym.o > ${.TARGET}
genassym.o: $S/$M/$M/genassym.c offset.inc
- ${CC} -c ${CFLAGS:N-flto:N-fno-common} $S/$M/$M/genassym.c
+ ${CC} -c ${CFLAGS:N-flto:N-fno-common} -fcommon $S/$M/$M/genassym.c
OBJS_DEPEND_GUESS+= opt_global.h
genoffset.o genassym.o vers.o: opt_global.h
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