Date: Mon, 11 Jan 2016 02:51:51 -0800 From: Mark Millard <markmi@dsl-only.net> To: Dimitry Andric <dim@FreeBSD.org>, Ian Lepore <ian@freebsd.org> Cc: freebsd-arm <freebsd-arm@freebsd.org>, FreeBSD Toolchain <freebsd-toolchain@freebsd.org> Subject: Re: Bug 205663 Clang getting Bus Errors (arm SCLTR Bit[12]==1 context): Reported fixed on llvm's trunk Message-ID: <85A38C85-27C5-4998-B680-208441932563@dsl-only.net> In-Reply-To: <602C5169-40E4-4A68-9C91-214E617FC255@dsl-only.net> References: <C90F0ABA-3C59-4FE1-AAB4-99F8FF32FB24@dsl-only.net> <CANCZdfoWDg_ZX8zxqRV2-Q6teYf_Ef4f3VKB0fhb0sikcW3hUA@mail.gmail.com> <1452020032.1320.21.camel@freebsd.org> <7EE8F65E-7485-4FA9-A136-F22090DB107F@FreeBSD.org> <92264003-CF0E-4624-A28A-8AFB7C663BFB@dsl-only.net> <39774562-F76E-41E9-85E7-ABE257B013D6@FreeBSD.org> <1452365750.1523.9.camel@freebsd.org> <831D8A96-51D6-4E34-B422-A20857B6769E@dsl-only.net> <602C5169-40E4-4A68-9C91-214E617FC255@dsl-only.net>
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On 2016-Jan-10, at 9:59 AM, Mark Millard <markmi at dsl-only.net> wrote:
>=20
> [A top post of my so far successful experiment. . .]
>=20
> amd64 -> rpi2 cross build: buildworld buildkernel installkernel =
installworld mergemaster delete-old then boot the result on an rpi2 =
worked ( -march=3Darmv7a -mcpu=3Dcortex-a7 -mfloat-abi=3Dsoftfp =
-mno-unaligned-access used ).
>=20
> In order to also build lldb I used the following beyond what Ian sent =
out for -mlong-calls usage:
> (I make no claim to have tested the lldb build.)
> (Tabs likely not preserved in the copy/paste operations.)
>=20
>> # more lib_libc++_Makfile.diff=20
>> Index: /usr/src/lib/libc++/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/libc++/Makefile (revision 293430)
>> +++ /usr/src/lib/libc++/Makefile (working copy)
>> @@ -57,6 +57,9 @@
>> .endfor
>>=20
>> WARNS=3D 0
>> +.if ${MACHINE_CPUARCH} =3D=3D "arm"
>> +STATIC_CXXFLAGS+=3D-mlong-calls
>> +.endif
>> CFLAGS+=3D -I${HDRDIR} -I${_LIBCXXRTDIR} -nostdlib -DLIBCXXRT
>> .if empty(CXXFLAGS:M-std=3D*)
>> CXXFLAGS+=3D -std=3Dc++11
>=20
>> # more usr_bin_clang_lldb_Makefile.diff=20
>> Index: /usr/src/usr.bin/clang/lldb/Makefile
>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>> --- /usr/src/usr.bin/clang/lldb/Makefile (revision 293430)
>> +++ /usr/src/usr.bin/clang/lldb/Makefile (working copy)
>> @@ -6,6 +6,10 @@
>>=20
>> LLDB_SRCS=3D${.CURDIR}/../../../contrib/llvm/tools/lldb
>>=20
>> +.if ${MACHINE_CPUARCH} =3D=3D "arm"
>> +CFLAGS+=3D-mlong-calls
>> +.endif
>> +
>> CFLAGS+=3D -I${LLDB_SRCS}/include
>> CXXFLAGS+=3D -std=3Dc++11
>=20
>=20
>=20
> The rpi2 is now attempting buildworld buildkernel targeting itself. It =
is way beyond where clang 3.7.1 crashed.
The rpi2 finished buildworld buildkernel. To build:
> WITH_FAST_DEPEND=3D
> WITH_LIBCPLUSPLUS=3D
> WITH_BINUTILS_BOOTSTRAP=3D
> WITH_CLANG=3D
> WITH_CLANG_IS_CC=3D
> WITH_CLANG_FULL=3D
> WITH_LLDB=3D
> WITH_CLANG_EXTRAS=3D
> WITH_BOOT=3D
> #
> WITHOUT_ELFTOOLCHAIN_BOOTSTRAP=3D
> WITHOUT_CLANG_BOOTSTRAP=3D
> WITHOUT_GCC_BOOTSTRAP=3D
> WITHOUT_LIB32=3D
> WITHOUT_GCC=3D
> WITHOUT_GNUCXX=3D
> #
> NO_WERROR=3D
> MALLOC_PRODUCTION=3D
> #
> WITH_DEBUG=3D
> WITH_DEBUG_FILES=3D
based on -target armv6--freebsd11.0-gnueabi -march=3Darmv7a =
-mcpu=3Dcortex-a7 -mfloat-abi=3Dsoftfp -mno-unaligned-access it took the =
rpi2 14 hours 26 min or so.
Then: installkernel; install world; shutdown -r now . . .
. . . It boots and operates as hoped. For this rpi2 context clang 3.8.0 =
seems to be working fine for such activity.
> # freebsd-version -ku; uname -aKU
> 11.0-CURRENT
> 11.0-CURRENT
> FreeBSD rpi2 11.0-CURRENT FreeBSD 11.0-CURRENT #2 r293579M: Mon Jan 11 =
07:36:21 UTC 2016 =
markmi@rpi2:/usr/obj/clang/arm.armv6/usr/src/sys/RPI2-NODBG arm 1100093 =
1100093
> make.conf empty.
src.conf (make.conf empty):
> TO_TYPE=3Darmv6
> #
> KERNCONF=3DRPI2-NODBG
> TARGET=3Darm
> .if ${.MAKE.LEVEL} =3D=3D 0
> TARGET_ARCH=3D${TO_TYPE}
> .export TARGET_ARCH
> .endif
> #
> WITH_FAST_DEPEND=3D
> WITH_LIBCPLUSPLUS=3D
> WITH_BINUTILS_BOOTSTRAP=3D
> WITH_CLANG=3D
> WITH_CLANG_IS_CC=3D
> WITH_CLANG_FULL=3D
> WITH_LLDB=3D
> WITH_CLANG_EXTRAS=3D
> WITH_BOOT=3D
> #
> WITHOUT_ELFTOOLCHAIN_BOOTSTRAP=3D
> WITHOUT_CLANG_BOOTSTRAP=3D
> WITHOUT_GCC_BOOTSTRAP=3D
> WITHOUT_LIB32=3D
> WITHOUT_GCC=3D
> WITHOUT_GNUCXX=3D
> #
> NO_WERROR=3D
> MALLOC_PRODUCTION=3D
> #
> WITH_DEBUG=3D
> WITH_DEBUG_FILES=3D
> #
> .if ${.MAKE.LEVEL} =3D=3D 0
> XCC=3D/usr/bin/clang -v -target ${TO_TYPE}--freebsd11.0-gnueabi =
-march=3Darmv7a -mcpu=3Dcortex-a7 -mfloat-abi=3Dsoftfp =
-mno-unaligned-access
> XCXX=3D/usr/bin/clang++ -v -target ${TO_TYPE}--freebsd11.0-gnueabi =
-march=3Darmv7a -mcpu=3Dcortex-a7 -mfloat-abi=3Dsoftfp =
-mno-unaligned-access
> XCPP=3D/usr/bin/clang-cpp -v -target ${TO_TYPE}--freebsd11.0-gnueabi =
-march=3Darmv7a -mcpu=3Dcortex-a7 -mfloat-abi=3Dsoftfp =
-mno-unaligned-access
> .export XCC
> .export XCXX
> .export XCPP
> .endif
> #
> .if ${.MAKE.LEVEL} =3D=3D 0
> CC=3D/usr/bin/clang -v -march=3Darmv7a -mcpu=3Dcortex-a7 =
-mfloat-abi=3Dsoftfp -mno-unaligned-access
> CXX=3D/usr/bin/clang++ -v -march=3Darmv7a -mcpu=3Dcortex-a7 =
-mfloat-abi=3Dsoftfp -mno-unaligned-access
> CPP=3D/usr/bin/clang-cpp -v -march=3Darmv7a -mcpu=3Dcortex-a7 =
-mfloat-abi=3Dsoftfp -mno-unaligned-access
> .export CC
> .export CXX
> .export CPP
> .endif
This vintage of src.conf presumes Ian Lepore's updates to the system's =
binutils that allow them to handle armv7a movt instruction usage and the =
like.
RPI2-NODBG:
> ident RPI2-NODBG
>=20
> include "RPI2"
>=20
> makeoptions DEBUG=3D-g # Build kernel with gdb(1) =
debug symbols
> options ALT_BREAK_TO_DEBUGGER
> #options VERBOSE_SYSINIT # Enable verbose sysinit =
messages
>=20
> options KDB # Enable kernel debugger =
support
>=20
> # For minimum debugger support (stable branch) use:
> #options KDB_TRACE # Print a stack trace for a =
panic
> options DDB # Enable the kernel debugger
>=20
> nooptions INVARIANTS # Enable calls of extra sanity =
checking
> nooptions INVARIANT_SUPPORT # Extra sanity checks of =
internal structures, required by INVARIANTS
> nooptions WITNESS # Enable checks to detect =
deadlocks and cycles
> nooptions WITNESS_SKIPSPIN # Don't run witness on =
spinlocks for speed
> nooptions DIAGNOSTIC
Where I've got somewhat variant source code is listed below:
(This includes the recent changes to various Makefiles for arm =
-mlong-call use for clang 3.8.0 .)
> # svnlite status /usr/src/
> M /usr/src/contrib/libcxxrt/guard.cc
> M /usr/src/lib/clang/clang.lib.mk
> M /usr/src/lib/csu/arm/Makefile
> M /usr/src/lib/csu/powerpc64/Makefile
> M /usr/src/lib/libc++/Makefile
> ? /usr/src/sys/arm/conf/RPI2-NODBG
> M /usr/src/sys/boot/ofw/Makefile.inc
> M /usr/src/sys/boot/powerpc/Makefile.inc
> M /usr/src/sys/boot/uboot/Makefile.inc
> ? /usr/src/sys/powerpc/conf/GENERIC64vtsc
> ? /usr/src/sys/powerpc/conf/GENERIC64vtsc-NODEBUG
> ? /usr/src/sys/powerpc/conf/GENERICvtsc
> ? /usr/src/sys/powerpc/conf/GENERICvtsc-NODEBUG
> M /usr/src/sys/powerpc/ofw/ofw_machdep.c
> M /usr/src/usr.bin/clang/clang/Makefile
> M /usr/src/usr.bin/clang/lldb/Makefile
(Most of the above is powerpc64 or powerpc specific, some even PowerMac =
G5 specific.)
Confirming that lldb does something:
> # more main.c
> int
> main ()
> {
> return 0;
> }
> # clang main.c
> # lldb a.out
> (lldb) target create "a.out"
> Current executable set to 'a.out' (arm).
> (lldb) run
> Process 744 launching
> Process 744 launched: '/root/c_tests/a.out' (arm)
> Process 744 exited with status =3D 0 (0x00000000)=20
> (lldb) quit
So the 2 additional Makefiles with -mlong-calls usage for arm was =
sufficient.
It does look like that for -march=3Darmv7a there will be an issue of =
needing more use of -fpic/-fPIC and the like in ports. Otherwise things =
like "unresolvable R_ARM_MOVW_ABS_NC relocation against symbol `g_free'" =
tend to occur in producing -Bsharable files.
For -march=3Darmv7a -mcpu=3Dcortex-a7 there is the example of =
.libs/gdkcairo.o being rejected with that message:
> /bin/sh ../libtool --tag=3DCC --mode=3Dlink /usr/bin/clang -v =
-target armv6--freebsd11.0-gnueabi -march=3Darmv7-a -mcpu=3Dcortex-a7 =
-mfloat-abi=3Dsoftfp -mno-unaligned-access -pipe -mfloat-abi=3Dsoftfp =
-g -fno-strict-aliasing -Wall -version-info 2400:29:2400 =
-export-dynamic -rpath /usr/local/lib -export-symbols-regex "^[^_].*" =
-L/usr/local/lib -o libgdk-x11-2.0.la gdk.lo gdkapplaunchcontext.lo =
gdkcairo.lo gdkcolor.lo gdkcursor.lo gdkdisplay.lo gdkdisplaymanager.lo =
gdkdnd.lo gdkdraw.lo gdkevents.lo gdkfont.lo gdkgc.lo gdkglobals.lo =
gdkimage.lo gdkkeys.lo gdkkeyuni.lo gdkoffscreenwindow.lo gdkpango.lo =
gdkpixbuf-drawable.lo gdkpixbuf-render.lo gdkpixmap.lo =
gdkpolyreg-generic.lo gdkrectangle.lo gdkregion-generic.lo gdkrgb.lo =
gdkscreen.lo gdkselection.lo gdkvisual.lo gdkwindow.lo gdkwindowimpl.lo =
gdkenumtypes.lo gdkmarshalers.lo x11/libgdk-x11.la -L/usr/local/lib =
-lpangocairo-1.0 -lpango-1.0 -lgio-2.0 -lfontconfig -lfreetype -lXrender =
-lXinerama -lXi -lXrandr -lXcursor -lXcomposite -lXdamage -lXfixes =
-lgdk_pixbuf-2.0 -lgobject-2.0 -lglib-2.0 -lintl -lcairo -lpthread -lX11 =
-lXext -lm
. . .
> libtool: link: /usr/bin/clang -v -target armv6--freebsd11.0-gnueabi =
-march=3Darmv7-a -mcpu=3Dcortex-a7 -mfloat-abi=3Dsoftfp =
-mno-unaligned-access -shared .libs/gdk.o .libs/gdkapplaunchcontext.o =
.libs/gdkcairo.o .libs/gdkcolor.o .libs/gdkcursor.o .libs/gdkdisplay.o =
.libs/gdkdisplaymanager.o .libs/gdkdnd.o .libs/gdkdraw.o =
.libs/gdkevents.o .libs/gdkfont.o .libs/gdkgc.o .libs/gdkglobals.o =
.libs/gdkimage.o .libs/gdkkeys.o .libs/gdkkeyuni.o =
.libs/gdkoffscreenwindow.o .libs/gdkpango.o .libs/gdkpixbuf-drawable.o =
.libs/gdkpixbuf-render.o .libs/gdkpixmap.o .libs/gdkpolyreg-generic.o =
.libs/gdkrectangle.o .libs/gdkregion-generic.o .libs/gdkrgb.o =
.libs/gdkscreen.o .libs/gdkselection.o .libs/gdkvisual.o =
.libs/gdkwindow.o .libs/gdkwindowimpl.o .libs/gdkenumtypes.o =
.libs/gdkmarshalers.o -Wl,--whole-archive x11/.libs/libgdk-x11.a =
-Wl,--no-whole-archive -L/usr/local/lib -lpangocairo-1.0 -lpango-1.0 =
-lgio-2.0 -lfontconfig -lfreetype -lXrender -lXinerama -lXi -lXrandr =
-lXcursor -lXcomposite -lXdamage -lXfixes -lgdk_pixbuf-2.0 -lgobject-2.0 =
-lglib-2.0 -lintl -lcairo -lpthread -lX11 -lXext -lm -march=3Darmv7-a =
-mcpu=3Dcortex-a7 -mfloat-abi=3Dsoftfp -mno-unaligned-access =
-mfloat-abi=3Dsoftfp -g -Wl,-soname -Wl,libgdk-x11-2.0.so.0 =
-Wl,-version-script -Wl,.libs/libgdk-x11-2.0.so.0.2400.29-ver -o =
.libs/libgdk-x11-2.0.so.0.2400.29
> FreeBSD clang version 3.8.0 (trunk 256945) (based on LLVM 3.8.0svn)
> Target: armv6--freebsd11.0-gnueabi
> Thread model: posix
> InstalledDir: /usr/bin
> "/usr/bin/ld" --eh-frame-hdr -Bshareable --hash-style=3Dboth =
--enable-new-dtags -o .libs/libgdk-x11-2.0.so.0.2400.29 /usr/lib/crti.o =
/usr/lib/crtbeginS.o -L/usr/local/lib -L/usr/lib .libs/gdk.o =
.libs/gdkapplaunchcontext.o .libs/gdkcairo.o .libs/gdkcolor.o =
.libs/gdkcursor.o .libs/gdkdisplay.o .libs/gdkdisplaymanager.o =
.libs/gdkdnd.o .libs/gdkdraw.o .libs/gdkevents.o .libs/gdkfont.o =
.libs/gdkgc.o .libs/gdkglobals.o .libs/gdkimage.o .libs/gdkkeys.o =
.libs/gdkkeyuni.o .libs/gdkoffscreenwindow.o .libs/gdkpango.o =
.libs/gdkpixbuf-drawable.o .libs/gdkpixbuf-render.o .libs/gdkpixmap.o =
.libs/gdkpolyreg-generic.o .libs/gdkrectangle.o =
.libs/gdkregion-generic.o .libs/gdkrgb.o .libs/gdkscreen.o =
.libs/gdkselection.o .libs/gdkvisual.o .libs/gdkwindow.o =
.libs/gdkwindowimpl.o .libs/gdkenumtypes.o .libs/gdkmarshalers.o =
--whole-archive x11/.libs/libgdk-x11.a --no-whole-archive =
-lpangocairo-1.0 -lpango-1.0 -lgio-2.0 -lfontconfig -lfreetype -lXrender =
-lXinerama -lXi -lXrandr -lXcursor -lXcomposite -lXdamage -lXfixes =
-lgdk_pixbuf-2.0 -lgobject-2.0 -lglib-2.0 -lintl -lcairo -lpthread -lX11 =
-lXext -lm -soname libgdk-x11-2.0.so.0 -version-script =
.libs/libgdk-x11-2.0.so.0.2400.29-ver -lgcc --as-needed -lgcc_s =
--no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed =
/usr/lib/crtendS.o /usr/lib/crtn.o
> /usr/bin/ld: .libs/gdkcairo.o(.text+0x61c): unresolvable =
R_ARM_MOVW_ABS_NC relocation against symbol `g_free'
> /usr/bin/ld: final link failed: Nonrepresentable section on output
> clang: error: linker command failed with exit code 1 (use -v to see =
invocation)
> Makefile:1098: recipe for target 'libgdk-x11-2.0.la' failed
> gmake[6]: *** [libgdk-x11-2.0.la] Error 1
> gmake[6]: Leaving directory =
'/usr/obj/portswork/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.29/gdk'
> Makefile:1238: recipe for target 'all-recursive' failed
> gmake[5]: *** [all-recursive] Error 1
> gmake[5]: Leaving directory =
'/usr/obj/portswork/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.29/gdk'
> Makefile:1018: recipe for target 'all' failed
> gmake[4]: *** [all] Error 2
> gmake[4]: Leaving directory =
'/usr/obj/portswork/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.29/gdk'
> Makefile:729: recipe for target 'all-recursive' failed
> gmake[3]: *** [all-recursive] Error 1
> gmake[3]: Leaving directory =
'/usr/obj/portswork/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.29'
> Makefile:621: recipe for target 'all' failed
> gmake[2]: *** [all] Error 2
> gmake[2]: Leaving directory =
'/usr/obj/portswork/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.29'
> =3D=3D=3D> Compilation failed unexpectedly.
> Try to set MAKE_JOBS_UNSAFE=3Dyes and rebuild before reporting the =
failure to
> the maintainer.
> *** Error code 1
Where the prior activity to produce .libs/gdkcairo.o was:
> /bin/sh ../libtool --tag=3DCC --mode=3Dcompile /usr/bin/clang -v =
-target armv6--freebsd11.0-gnueabi -march=3Darmv7-a -mcpu=3Dcortex-a7 =
-mfloat-abi=3Dsoftfp -mno-unaligned-access -DHAVE_CONFIG_H -I. -I.. =
-DG_LOG_DOMAIN=3D\"Gdk\" -DGDK_COMPILATION -I.. -I.. -I../gdk =
-DG_DISABLE_CAST_CHECKS -I/usr/local/include/glib-2.0 =
-I/usr/local/lib/glib-2.0/include -I/usr/local/include =
-I/usr/local/include/pango-1.0 -I/usr/local/include/cairo =
-I/usr/local/include/pixman-1 -I/usr/local/include/freetype2 =
-I/usr/local/include/libdrm -I/usr/local/include/libpng16 =
-I/usr/local/include/gio-unix-2.0/ -I/usr/local/include/gdk-pixbuf-2.0 =
-pthread -D_THREAD_SAFE -I/usr/local/include =
-DG_DISABLE_SINGLE_INCLUDES -DATK_DISABLE_SINGLE_INCLUDES =
-DGDK_PIXBUF_DISABLE_SINGLE_INCLUDES -DGTK_DISABLE_SINGLE_INCLUDES =
-I/usr/local/include -D_THREAD_SAFE -pipe -mfloat-abi=3Dsoftfp -g =
-fno-strict-aliasing -Wall -MT gdkcairo.lo -MD -MP -MF =
.deps/gdkcairo.Tpo -c -o gdkcairo.lo gdkcairo.c
. . .
> "/usr/bin/clang" -cc1 -triple armv7--freebsd11.0-gnueabi -emit-obj =
-mrelax-all -disable-free -main-file-name gdkcairo.c -mrelocation-model =
static -mthread-model posix -mdisable-fp-elim -relaxed-alias
> ing -masm-verbose -mconstructor-aliases -target-cpu cortex-a7 =
-target-feature +soft-float-abi -target-feature +strict-align =
-target-abi aapcs-linux -mfloat-abi soft -v -dwarf-column-info =
-debug-info-k
> ind=3Dstandalone -dwarf-version=3D2 -debugger-tuning=3Dgdb =
-coverage-file =
/usr/obj/portswork/usr/ports/x11-toolkits/gtk20/work/gtk+-2.24.29/gdk/gdkc=
airo.c -resource-dir /usr/bin/../lib/clang/3.8.0 -dependen
> cy-file .deps/gdkcairo.Tpo -sys-header-deps -MP -MT gdkcairo.lo -D =
HAVE_CONFIG_H -I . -I .. -D "G_LOG_DOMAIN=3D\"Gdk\"" -D GDK_COMPILATION =
-I .. -I .. -I ../gdk -D G_DISABLE_CAST_CHECKS -I /usr/local/in
> clude/glib-2.0 -I /usr/local/lib/glib-2.0/include -I =
/usr/local/include -I /usr/local/include/pango-1.0 -I =
/usr/local/include/cairo -I /usr/local/include/pixman-1 -I =
/usr/local/include/freetype2 -I /u
> sr/local/include/libdrm -I /usr/local/include/libpng16 -I =
/usr/local/include/gio-unix-2.0/ -I /usr/local/include/gdk-pixbuf-2.0 -D =
_THREAD_SAFE -I /usr/local/include -D G_DISABLE_SINGLE_INCLUDES -D AT
> K_DISABLE_SINGLE_INCLUDES -D GDK_PIXBUF_DISABLE_SINGLE_INCLUDES -D =
GTK_DISABLE_SINGLE_INCLUDES -I /usr/local/include -D _THREAD_SAFE -Wall =
-fdebug-compilation-dir /usr/obj/portswork/usr/ports/x11-tool
> kits/gtk20/work/gtk+-2.24.29/gdk -ferror-limit 19 -fmessage-length 200 =
-pthread -fallow-half-arguments-and-returns -fno-signed-char =
-fobjc-runtime=3Dgnustep -fdiagnostics-show-option -fcolor-diagnostics
> -o gdkcairo.o -x c gdkcairo.c
. . .
> libtool: compile: mv -f "gdkcairo.o" ".libs/gdkcairo.o"
=3D=3D=3D
Mark Millard
markmi at dsl-only.net
On 2016-Jan-10, at 3:55 AM, Mark Millard <markmi at dsl-only.net> wrote:
>=20
>=20
> On 2016-Jan-9, at 10:55 AM, Ian Lepore <ian at freebsd.org> wrote:
>>=20
>> On Sat, 2016-01-09 at 15:03 +0100, Dimitry Andric wrote:
>>> On 09 Jan 2016, at 04:46, Mark Millard <markmi at dsl-only.net> =
wrote:
>>>>=20
>>>> On 2016-Jan-7, at 2:57 PM, Dimitry Andric <dim at FreeBSD.org>
>>>> wrote:
>>> ...
>>>>> FYI, I have added a -mno-movt option for this purpose upstream,
>>>>> and
>>>>> imported a newer snapshot into the clang380-import branch. As of
>>>>> r293384, it now uses the new option spelling for modules, if your
>>>>> clang
>>>>> is 3.8.0 or higher.
>>>>>=20
>>>>> -Dimitry
>>>>=20
>>>> I've not been able to get to the point of running clang++ 3.8 on
>>>> the rpi2 yet: R_ARM_CALL and R_ARM_JUMP24 relocation truncations
>>>> during the cross build's buildworld interfere.
>>>=20
>>> Yes, this is caused by too large call distances. In other words, =
the
>>> clang executable is getting to big to link. Apparently we need to =
do
>>> some tricks with -mlongcall to fix this. As I am no arm expert, I
>>> welcome any patch submissions. :-)
>>>=20
>>> -Dimitry
>>>=20
>>=20
>> Here's the patch I got from Andy for the clang380 branch, modified =
with
>> Warner's suggestion to use MACHINE_CPUARCH instead of MACHINE. With
>> this I can get a working arm world that will build a runnable
>> helloworld.c (and .cc) on a dreamplug. (I.e., it appears clang 3.8.0
>> fixes the problem we had with clang 3.7.x where it wouldn't run at =
all
>> on armv4/5 systems). I have not tried compling anything complex yet.
>>=20
>> -- Ian
>=20
>=20
> Context: When I build I normally build lldb and the like as well, even =
using WITH_CLANG_EXTRAS=3D .
>=20
> In trying to get lldb to link I eventually get to the point that =
libc++ is getting relocation truncations. Before getting to that I deal =
with /usr/src/usr.bin/clang/lldb/Makefile to cover what is initially =
reported during buildworld for lldb relocation truncations. Then with =
that in place and retrying I get reports from libc++.a for a couple of =
the contained .o files having relocations that are truncated (before it =
reports "additional relocation overflows omitted from the output"):
>=20
> /usr/obj/clang/arm.armv6/usr/src/tmp/usr/lib/libc++.a(thread.o)
> /usr/obj/clang/arm.armv6/usr/src/tmp/usr/lib/libc++.a(locale.o)
>=20
> (Both have messages from multiple places in each .o file.)
>=20
> As far as I can tell for general use -long-calls is going to be needed =
for at least some system level .a library content if the .a's are to be =
used.
>=20
> Which leaves me wondering if STATIC_CXXFLAGS having -mlong-calls for =
arm system libraries fairly generally is appropriate for those intending =
on building the arm-native clang toolchain and related material in =
buildworld. (STATIC_CFLAGS too?) A significant case analysis of what =
happens to currently be too far apart would be fragile as things grow =
even more later.
>=20
> This sort of issue may well not be limited to TARGET=3Darm contexts.
>=20
> The detailed libc++.a relocation truncation complaints that I got =
were:
>=20
>=20
>> --- all_subdir_lldb ---
>> /usr/obj/clang/arm.armv6/usr/src/tmp/usr/lib/libc++.a(thread.o): In =
function =
`_ZNSt3__16vectorINS_4pairIPNS_18condition_variableEPNS_5mutexEEENS_18__hi=
dden_allocatorIS6_EEE21__push_back_slow_pathIS6_EEvOT_':
>> =
/usr/src/lib/libc++/../../contrib/libc++/src/thread.cpp:(.text._ZNSt3__16v=
ectorINS_4pairIPNS_18condition_variableEPNS_5mutexEEENS_18__hidden_allocat=
orIS6_EEE21__push_back_slow_pathIS6_EEvOT_[_ZNSt3__16vectorINS_4pairIPNS_1=
8condition_variableEPNS_5mutexEEENS_18__hidden_allocatorIS6_EEE21__push_ba=
ck_slow_pathIS6_EEvOT_]+0x30): relocation truncated to fit: R_ARM_CALL =
against symbol =
`std::__1::__vector_base_common<true>::__throw_length_error() const' =
defined in =
.text._ZNKSt3__120__vector_base_commonILb1EE20__throw_length_errorEv[_ZNKS=
t3__120__vector_base_commonILb1EE20__throw_length_errorEv] section in =
/usr/obj/clang/arm.armv6/usr/src/usr.bin/clang/lldb/../../../lib/clang/lib=
lldbCore/liblldbCore.a(CxaDemangle.o)
>=20
>> /usr/obj/clang/arm.armv6/usr/src/tmp/usr/lib/libc++.a(thread.o): In =
function =
`_ZNSt3__16vectorIPNS_17__assoc_sub_stateENS_18__hidden_allocatorIS2_EEE21=
__push_back_slow_pathIRKS2_EEvOT_':
>> =
/usr/src/lib/libc++/../../contrib/libc++/src/thread.cpp:(.text._ZNSt3__16v=
ectorIPNS_17__assoc_sub_stateENS_18__hidden_allocatorIS2_EEE21__push_back_=
slow_pathIRKS2_EEvOT_[_ZNSt3__16vectorIPNS_17__assoc_sub_stateENS_18__hidd=
en_allocatorIS2_EEE21__push_back_slow_pathIRKS2_EEvOT_]+0x30): =
relocation truncated to fit: R_ARM_CALL against symbol =
`std::__1::__vector_base_common<true>::__throw_length_error() const' =
defined in =
.text._ZNKSt3__120__vector_base_commonILb1EE20__throw_length_errorEv[_ZNKS=
t3__120__vector_base_commonILb1EE20__throw_length_errorEv] section in =
/usr/obj/clang/arm.armv6/usr/src/usr.bin/clang/lldb/../../../lib/clang/lib=
lldbCore/liblldbCore.a(CxaDemangle.o)
>=20
> . . .
>> --- all_subdir_clang ---
>> /usr/obj/clang/arm.armv6/usr/src/tmp/usr/lib/libc++.a(locale.o): In =
function `std::__1::collate_byname<char>::do_compare(char const*, char =
const*, char const*, char const*) const':
> . . .
>> --- all_subdir_clang ---
>> =
/usr/src/lib/libc++/../../contrib/libc++/src/locale.cpp:(.text+0x81ec): =
relocation truncated to fit: R_ARM_CALL against symbol =
`std::__1::__basic_string_common<true>::__throw_length_error() const' =
defined in =
.text._ZNKSt3__121__basic_string_commonILb1EE20__throw_length_errorEv[_ZNK=
St3__121__basic_string_commonILb1EE20__throw_length_errorEv] section in =
/usr/obj/clang/arm.armv6/usr/src/usr.bin/clang/lldb/../../../lib/clang/lib=
lldbCore/liblldbCore.a(CxaDemangle.o)
> . . .
>> --- all_subdir_clang ---
>> =
/usr/src/lib/libc++/../../contrib/libc++/src/locale.cpp:(.text+0x82c0): =
relocation truncated to fit: R_ARM_CALL against symbol =
`std::__1::__basic_string_common<true>::__throw_length_error() const' =
defined in =
.text._ZNKSt3__121__basic_string_commonILb1EE20__throw_length_errorEv[_ZNK=
St3__121__basic_string_commonILb1EE20__throw_length_errorEv] section in =
/usr/obj/clang/arm.armv6/usr/src/usr.bin/clang/lldb/../../../lib/clang/lib=
lldbCore/liblldbCore.a(CxaDemangle.o)
>=20
>> /usr/obj/clang/arm.armv6/usr/src/tmp/usr/lib/libc++.a(locale.o): In =
function `std::__1::collate_byname<char>::do_transform(char const*, char =
const*) const':
>> =
/usr/src/lib/libc++/../../contrib/libc++/src/locale.cpp:(.text+0x8430): =
relocation truncated to fit: R_ARM_CALL against symbol =
`std::__1::__basic_string_common<true>::__throw_length_error() const' =
defined in =
.text._ZNKSt3__121__basic_string_commonILb1EE20__throw_length_errorEv[_ZNK=
St3__121__basic_string_commonILb1EE20__throw_length_errorEv] section in =
/usr/obj/clang/arm.armv6/usr/src/usr.bin/clang/lldb/../../../lib/clang/lib=
lldbCore/liblldbCore.a(CxaDemangle.o)
>=20
>> /usr/obj/clang/arm.armv6/usr/src/tmp/usr/lib/libc++.a(locale.o): In =
function `std::__1::collate_byname<wchar_t>::do_compare(wchar_t const*, =
wchar_t const*, wchar_t const*, wchar_t const*) const':
>=20
>> --- all_subdir_clang ---
>> =
/usr/src/lib/libc++/../../contrib/libc++/src/locale.cpp:(.text+0x88a8): =
relocation truncated to fit: R_ARM_CALL against symbol =
`std::__1::__basic_string_common<true>::__throw_length_error() const' =
defined in =
.text._ZNKSt3__121__basic_string_commonILb1EE20__throw_length_errorEv[_ZNK=
St3__121__basic_string_commonILb1EE20__throw_length_errorEv] section in =
/usr/obj/clang/arm.armv6/usr/src/usr.bin/clang/lldb/../../../lib/clang/lib=
lldbCore/liblldbCore.a(CxaDemangle.o)
>=20
>> =
/usr/src/lib/libc++/../../contrib/libc++/src/locale.cpp:(.text+0x899c): =
relocation truncated to fit: R_ARM_CALL against symbol =
`std::__1::__basic_string_common<true>::__throw_length_error() const' =
defined in =
.text._ZNKSt3__121__basic_string_commonILb1EE20__throw_length_errorEv[_ZNK=
St3__121__basic_string_commonILb1EE20__throw_length_errorEv] section in =
/usr/obj/clang/arm.armv6/usr/src/usr.bin/clang/lldb/../../../lib/clang/lib=
lldbCore/liblldbCore.a(CxaDemangle.o)
>=20
>> /usr/obj/clang/arm.armv6/usr/src/tmp/usr/lib/libc++.a(locale.o): In =
function `std::__1::collate_byname<wchar_t>::do_transform(wchar_t =
const*, wchar_t const*) const':
>> =
/usr/src/lib/libc++/../../contrib/libc++/src/locale.cpp:(.text+0x8b34): =
relocation truncated to fit: R_ARM_CALL against symbol =
`std::__1::__basic_string_common<true>::__throw_length_error() const' =
defined in =
.text._ZNKSt3__121__basic_string_commonILb1EE20__throw_length_errorEv[_ZNK=
St3__121__basic_string_commonILb1EE20__throw_length_errorEv] section in =
/usr/obj/clang/arm.armv6/usr/src/usr.bin/clang/lldb/../../../lib/clang/lib=
lldbCore/liblldbCore.a(CxaDemangle.o)
>=20
>> /usr/obj/clang/arm.armv6/usr/src/tmp/usr/lib/libc++.a(locale.o): In =
function `std::__1::collate<char>::do_transform(char const*, char =
const*) const':
>> =
/usr/src/lib/libc++/../../contrib/libc++/src/locale.cpp:(.text._ZNKSt3__17=
collateIcE12do_transformEPKcS3_[_ZNKSt3__17collateIcE12do_transformEPKcS3_=
]+0x34): relocation truncated to fit: R_ARM_CALL against symbol =
`std::__1::__basic_string_common<true>::__throw_length_error() const' =
defined in =
.text._ZNKSt3__121__basic_string_commonILb1EE20__throw_length_errorEv[_ZNK=
St3__121__basic_string_commonILb1EE20__throw_length_errorEv] section in =
/usr/obj/clang/arm.armv6/usr/src/usr.bin/clang/lldb/../../../lib/clang/lib=
lldbCore/liblldbCore.a(CxaDemangle.o)
>=20
>> /usr/obj/clang/arm.armv6/usr/src/tmp/usr/lib/libc++.a(locale.o): In =
function `std::__1::collate<wchar_t>::do_transform(wchar_t const*, =
wchar_t const*) const':
>> =
/usr/src/lib/libc++/../../contrib/libc++/src/locale.cpp:(.text._ZNKSt3__17=
collateIwE12do_transformEPKwS3_[_ZNKSt3__17collateIwE12do_transformEPKwS3_=
]+0x38): relocation truncated to fit: R_ARM_CALL against symbol =
`std::__1::__basic_string_common<true>::__throw_length_error() const' =
defined in =
.text._ZNKSt3__121__basic_string_commonILb1EE20__throw_length_errorEv[_ZNK=
St3__121__basic_string_commonILb1EE20__throw_length_errorEv] section in =
/usr/obj/clang/arm.armv6/usr/src/usr.bin/clang/lldb/../../../lib/clang/lib=
lldbCore/liblldbCore.a(CxaDemangle.o)
>=20
>> /usr/obj/clang/arm.armv6/usr/src/tmp/usr/lib/libc++.a(locale.o): In =
function `std::__1::num_put<char, std::__1::ostreambuf_iterator<char, =
std::__1::char_traits<char> > =
>::do_put(std::__1::ostreambuf_iterator<char, =
std::__1::char_traits<char> >, std::__1::ios_base&, char, long) const':
>> =
/usr/src/lib/libc++/../../contrib/libc++/src/locale.cpp:(.text._ZNKSt3__17=
num_putIcNS_19ostreambuf_iteratorIcNS_11char_traitsIcEEEEE6do_putES4_RNS_8=
ios_baseEcl[_ZNKSt3__17num_putIcNS_19ostreambuf_iteratorIcNS_11char_traits=
IcEEEEE6do_putES4_RNS_8ios_baseEcl]+0x16c): additional relocation =
overflows omitted from the output
>=20
>=20
> Ian's/Andy's original patch is listed below for reference.
>=20
>> Index: lib/clang/clang.lib.mk
>> =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
>> --- lib/clang/clang.lib.mk (revision 293584)
>> +++ lib/clang/clang.lib.mk (working copy)
>> @@ -6,4 +6,8 @@ LLVM_SRCS=3D ${.CURDIR}/../../../contrib/llvm
>>=20
>> INTERNALLIB=3D
>>=20
>> +.if ${MACHINE_CPUARCH} =3D=3D "arm"
>> +STATIC_CXXFLAGS+=3D-mlong-calls
>> +.endif
>> +
>> .include <bsd.lib.mk>
>> Index: lib/csu/arm/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
>> --- lib/csu/arm/Makefile (revision 293584)
>> +++ lib/csu/arm/Makefile (working copy)
>> @@ -23,7 +23,7 @@ CLEANFILES+=3D crt1.s gcrt1.s Scrt1.s
>> # directly compiled to .o files.
>>=20
>> crt1.s: crt1.c
>> - ${CC} ${CFLAGS} -S -o ${.TARGET} ${.CURDIR}/crt1.c
>> + ${CC} ${CFLAGS} -mlong-calls -S -o ${.TARGET} ${.CURDIR}/crt1.c
>> sed ${SED_FIX_NOTE} ${.TARGET}
>>=20
>> crt1.o: crt1.s
>> @@ -30,7 +30,7 @@ crt1.o: crt1.s
>> ${CC} ${ACFLAGS} -c -o ${.TARGET} crt1.s
>>=20
>> gcrt1.s: crt1.c
>> - ${CC} ${CFLAGS} -DGCRT -S -o ${.TARGET} ${.CURDIR}/crt1.c
>> + ${CC} ${CFLAGS} -mlong-calls -DGCRT -S -o ${.TARGET} =
${.CURDIR}/crt1.c
>> sed ${SED_FIX_NOTE} ${.TARGET}
>>=20
>> gcrt1.o: gcrt1.s
>> Index: usr.bin/clang/clang/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.bin/clang/clang/Makefile (revision 293584)
>> +++ usr.bin/clang/clang/Makefile (working copy)
>> @@ -11,7 +11,11 @@ SRCS=3D cc1_main.cpp \
>>=20
>> .if ${MK_SHARED_TOOLCHAIN} =3D=3D "no"
>> NO_SHARED?=3D yes
>> +
>> +.if ${MACHINE_CPUARCH} =3D=3D "arm"
>> +CFLAGS+=3D-mlong-calls
>> .endif
>> +.endif
>>=20
>> LINKS=3D ${BINDIR}/clang ${BINDIR}/clang++ \
>> ${BINDIR}/clang ${BINDIR}/clang-cpp
>>=20
>=20
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