Date: Sun, 4 Oct 2015 04:06:03 -0700 From: Mark Millard <markmi@dsl-only.net> To: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org> Cc: freebsd-toolchain@freebsd.org Subject: bt_split.c error: dereferencing type-punned pointer will break strict-aliasing rules (powerpc64-xtoolchain use) Message-ID: <191CDC2D-7A74-41D2-B433-B6D9F6D87D32@dsl-only.net>
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The Problem:
root@FreeBSDx64:/usr/src # make -j 7 CROSS_TOOLCHAIN=3Dpowerpc64-gcc =
buildworld buildkernel KERNCONF=3DGENERIC64-NODBG TARGET=3Dpowerpc =
TARGET_ARCH=3Dpowerpc64
. . .
--- bt_split.So ---
/usr/local/bin/powerpc64-portbld-freebsd11.0-gcc -isystem =
/usr/obj/powerpc.powerpc64/usr/src/tmp/usr/include =
-L/usr/obj/powerpc.powerpc64/usr/src/tmp/usr/lib =
--sysroot=3D/usr/obj/powerpc.powerpc64/usr/src/tmp =
-B/usr/local/powerpc64-freebsd/bin/ -fpic -DPIC -O2 -pipe =
-I/usr/src/lib/libc/include -I/usr/src/lib/libc/../../include =
-I/usr/src/lib/libc/powerpc64 -DNLS -D__DBINTERFACE_PRIVATE =
-I/usr/src/lib/libc/../../contrib/gdtoa =
-I/usr/src/lib/libc/../../contrib/libc-vis -DINET6 =
-I/usr/obj/powerpc.powerpc64/usr/src/lib/libc -I/usr/src/lib/libc/resolv =
-D_ACL_PRIVATE -DPOSIX_MISTAKE -I/usr/src/lib/libc/../libmd =
-I/usr/src/lib/libc/../../contrib/jemalloc/include =
-I/usr/src/lib/libc/../../contrib/tzcode/stdtime =
-I/usr/src/lib/libc/stdtime -I/usr/src/lib/libc/locale -DBROKEN_DES =
-DPORTMAP -DDES_BUILTIN -I/usr/src/lib/libc/rpc -DYP -DNS_CACHING =
-DSYMBOL_VERSIONING -std=3Dgnu99 -fstack-protector -Wsystem-headers =
-Werror -Wall -Wno-format-y2k -Wno-uninitialized -Wno-pointer-sign =
-I/usr/src/lib/libutil -I/usr/src/lib/msun/powerpc =
-I/usr/src/lib/msun/src -c /usr/src/lib/libc/db/btree/bt_split.c -o =
bt_split.So
. . .
--- bt_split.So ---
/usr/src/lib/libc/db/btree/bt_split.c: In function '__bt_split':
/usr/src/lib/libc/db/btree/bt_split.c:240:8: error: dereferencing =
type-punned pointer will break strict-aliasing rules =
[-Werror=3Dstrict-aliasing]
bt_preserve(t, *(pgno_t *)bl->bytes) =3D=3D RET_ERROR)
^
/usr/src/lib/libc/db/btree/bt_split.c: In function 'bt_broot':
/usr/src/lib/libc/db/btree/bt_split.c:548:7: error: dereferencing =
type-punned pointer will break strict-aliasing rules =
[-Werror=3Dstrict-aliasing]
bt_preserve(t, *(pgno_t *)bl->bytes) =3D=3D RET_ERROR)
^
. . .
--- bt_split.So ---
cc1: all warnings being treated as errors
*** [bt_split.So] Error code 1
make[4]: stopped in /usr/src/lib/libc
1 error
. . .
The context details follow.
Mac OS X 10.10.5 using a VirtualBox V5.0.4 VM with. . .
root@FreeBSDx64:/usr/src # freebsd-version -ku; uname -aKU
11.0-CURRENT
11.0-CURRENT
FreeBSD FreeBSDx64 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r288459: Sat Oct =
3 03:42:08 PDT 2015 =
root@FreeBSDx64:/usr/obj/usr/src/sys/GENERIC-NODEBUG amd64 1100079 =
1100079
root@FreeBSDx64:/usr/src # svnlite info /usr/src
Path: .
Working Copy Root Path: /usr/src
URL: https://svn.freebsd.org/base/head
Relative URL: ^/head
Repository Root: https://svn.freebsd.org/base
Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Revision: 288459
Node Kind: directory
Schedule: normal
Last Changed Author: gjb
Last Changed Rev: 288459
Last Changed Date: 2015-10-01 12:48:10 -0700 (Thu, 01 Oct 2015)
root@FreeBSDx64:/usr/src # svnlite info /usr/ports
Path: /usr/ports
Working Copy Root Path: /usr/ports
URL: https://svn.freebsd.org/ports/head
Relative URL: ^/head
Repository Root: https://svn.freebsd.org/ports
Repository UUID: 35697150-7ecd-e111-bb59-0022644237b5
Revision: 398559
Node Kind: directory
Schedule: normal
Last Changed Author: jbeich
Last Changed Rev: 398559
Last Changed Date: 2015-10-03 17:42:55 -0700 (Sat, 03 Oct 2015)
root@FreeBSDx64:/usr/src # portmaster --list-origins
net/avahi
devel/boost-all
lang/clang37
ports-mgmt/dialog4ports
lang/gcc5
devel/git-lite
x11/lumina
www/midori
net/netatalk3
ports-mgmt/pkg
ports-mgmt/portmaster
devel/powerpc64-xtoolchain-gcc
devel/qtcreator
security/sudo
mail/thunderbird
emulators/virtualbox-ose-additions
Very little is non-default source code. . .
root@FreeBSDx64:/usr/src # svnlite status /usr/src
M /usr/src/lib/csu/powerpc64/Makefile
? /usr/src/sys/arm/conf/RPI2-NODBG
? /usr/src/sys/powerpc/conf/GENERIC64-NODBG
root@FreeBSDx64:/usr/src # svnlite status /usr/ports
? /usr/ports/ion
root@FreeBSDx64:/usr/src # more =
/usr/src/sys/powerpc/conf/GENERIC64-NODBG=20
. . . (comments omitted) . . .
include GENERIC64
ident GENERIC-NODBG
nooptions INVARIANTS
nooptions INVARIANT_SUPPORT
nooptions WITNESS
nooptions WITNESS_SKIPSPIN
nooptions DEADLKRES
The following is my personal, local workaround for =
/usr/src/lib/csu/powerpc64/Makefile forcing use of the gcc command even =
when the context does not have one.
root@FreeBSDx64:/usr/src # svnlite diff /usr/src
Index: /usr/src/lib/csu/powerpc64/Makefile
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- /usr/src/lib/csu/powerpc64/Makefile (revision 288459)
+++ /usr/src/lib/csu/powerpc64/Makefile (working copy)
@@ -13,8 +13,8 @@
# clang doesn't support -mlongcall, and testing shows a clang linked =
with a
# clang-built csu segfaults, this must currently be compiled with gcc. =
Once
# clang supports -mlongcall, or we get a fixed ld, this can be =
revisited.
-CC:=3D gcc
-COMPILER_TYPE:=3D gcc
+CC?=3D $(XCC)
+#COMPILER_TYPE:=3D gcc
FILES=3D ${OBJS}
FILESMODE=3D ${LIBMODE}
=3D=3D=3D
Mark Millard
markmi at dsl-only.net
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