On 2018-May-11, at 4:09 PM, Mark Millard <marklmi26-f...@yahoo.com> wrote:
> [I experiment with targeting powerpc family members with > modern tool chains. In this case trying to use > devel/xtoolchain-llvm60 . This was indirectly reached via > commenting on a bugzilla entry for something else powerpc > family related.] > > BEGIN setup notes: > > Because of (at least) lld problems for targeting powerpc family members, > the following is based on an alternate toolchains/*.mk : > > # diff /usr/local/share/toolchains/llvm60.mk > /usr/local/share/toolchains/llvm60_altbinutils.mk > 4,5c4,5 > < XLD=/usr/local/llvm60/bin/ld.lld > < CROSS_BINUTILS_PREFIX=/var/empty > --- > >> #XLD=/usr/local/llvm60/bin/ld.lld >> #CROSS_BINUTILS_PREFIX=/var/empty > > This is to allow setting up the use of: > > CROSS_BINUTILS_PREFIX=/usr/local/powerpc64-unknown-freebsd12.0/bin/ > > END Setup notes. > > The below is from adding a -v to what the .meta file showed for the failing > command. > Note the "-cc1as -triple i386-portbld-freebsd12.0" and "-target-cpu i486" > that results > from buildworld’s lib32 related command that tries to compile assembly source > for > powerpc. > > > # /usr/local/bin/clang60 -v -DCOMPAT_32BIT -mcpu=powerpc -m32 > -L/usr/obj/powerpc64vtsc_xtoolchain-llvm/powerpc.powerpc64/usr/src/powerpc.powerpc64/obj-lib32/tmp/usr/lib32 > > tosysroot=/usr/obj/powerpc64vtsc_xtoolchain-llvm/powerpc.powerpc64/usr/src/powerpc.powerpc64/obj-lib32/tmp > -B/usr/local/powerpc64-unknown-freebsd12.0/bin -B/usr/obj/powerpc64vtsc_x > -Wall -Wno-format-y2k -W -Wno-unused-parameter -Wstrict-prototypes > -Wmissing-prototypes -Wpointer-arith -Wreturn-type -Wcast-qual > -Wwrite-strings -Wswitch -Wshadow -Wunused-parameter -Wcast-align > -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls > -Wold-style-definition -Wno-pointer-sign -Wthread-safety -Wno-empty-body > -Wno-string-plus-int -Wno-unused-const-variable -Qunused-arguments -c > /usr/src/lib/csu/powerpc/crtn.S -o crtn.ole-definition -Wno-pointer-sign > -Wthread-safety -Wno-empty-body -Wno-string-plus-int -Wno-unus > clang version 6.0.0 (tags/RELEASE_600/final)/usr/src/lib/csu/powerpc/crtn.S > -o crtn.o > Target: i386-portbld-freebsd12.0 > Thread model: posix > InstalledDir: /usr/local/llvm60/bin > "/usr/local/llvm60/bin/clang-6.0" -cc1 -triple i386-portbld-freebsd12.0 -E > -disable-free -main-file-name crtn.S -mrelocation-model static -mthread-model > posix -mdisable-fp-elim -masm-verbose -mconstructor-aliases -target-cpu i486 > -dwarf-column-info -debug-info-kind=standalone -dwarf-version=2 > -debugger-tuning=gdb -v -coverage-notes-file /usr/src/crtn.gcno -resource-dir > /usr/local/llvm60/lib/clang/6.0.0 -D COMPAT_32BIT -I /usr/src/lib/csu/common > -I /usr/src/lib/libc/include -isysroot > /usr/obj/powerpc64vtsc_xtoolchain-llvm/powerpc.powerpc64/usr/src/powerpc.powerpc64/obj-lib32/tmp > -O2 -Wsystem-headers -Wall -Wno-format-y2k -W -Wno-unused-parameter > -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wreturn-type > -Wcast-qual -Wwrite-strings -Wswitch -Wshadow -Wunused-parameter -Wcast-align > -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls > -Wold-style-definition -Wno-pointer-sign -Wthread-safety -Wno-empty-body > -Wno-string-plus-int -Wno-unused-const-variable -std=gnu99 -fconst-strings > -fdebug-compilation-dir /usr/src -ferror-limit 19 -fmessage-length 180 > -fobjc-runtime=gnustep -fdiagnostics-show-option -vectorize-loops > -vectorize-slp -o /tmp/crtn-d80df9.s -x assembler-with-cpp > /usr/src/lib/csu/powerpc/crtn.S > clang -cc1 version 6.0.0 based upon LLVM 6.0.0 default target > x86_64-portbld-freebsd12.0 > #include "..." search starts here: > #include <...> search starts here: > /usr/src/lib/csu/common > /usr/src/lib/libc/include > /usr/local/llvm60/lib/clang/6.0.0/include > /usr/obj/powerpc64vtsc_xtoolchain-llvm/powerpc.powerpc64/usr/src/powerpc.powerpc64/obj-lib32/tmp/usr/include > End of search list. > "/usr/local/llvm60/bin/clang-6.0" -cc1as -triple i386-portbld-freebsd12.0 > -filetype obj -main-file-name crtn.S -target-cpu i486 -I > /usr/src/lib/csu/common -I /usr/src/lib/libc/include -fdebug-compilation-dir > /usr/src -dwarf-debug-producer clang version 6.0.0 (tags/RELEASE_600/final) > -I /usr/src/lib/csu/common -I /usr/src/lib/libc/include > -debug-info-kind=limited -dwarf-version=2 -mrelocation-model static -o crtn.o > /tmp/crtn-d80df9.s > /usr/src/lib/csu/powerpc/crtn.S:29:2: warning: DWARF2 only supports one > section per compilation unit > .section .init,"ax",@progbits > ^ > /usr/src/lib/csu/powerpc/crtn.S:30:11: error: unexpected token in memory > operand > lwz 11,0(1) > ^ > /usr/src/lib/csu/powerpc/crtn.S:31:10: error: unexpected token in memory > operand > lwz 0,4(11) > ^ > /usr/src/lib/csu/powerpc/crtn.S:32:2: error: invalid instruction mnemonic > 'mtlr' > mtlr 0 > ^~~~ > . . . > > > > It would appear that a -triple may be missing in the /usr/local/bin/clang60 > command line that would specify the specific ABI to target. It appears that > the -mcpu=powerpc is not enough to even get the cpu family right as far as > what assembler notation to process. > > I do not know if an appropriate -triple addition would currently be > sufficient for things to start working. > > Something needs to cause the right assembler notation to be processed for > lib32 if WITH_LIB32= is to be supported for cross builds. Kenneth Salerno's https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227920 is an example patch for 11.1 for this lack of -target use where it can be needed. === Mark Millard marklmi26-fbsd at yahoo.com ( dsl-only.net went away in early 2018-Mar) _______________________________________________ freebsd-toolchain@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-toolchain To unsubscribe, send any mail to "freebsd-toolchain-unsubscr...@freebsd.org"
