gcc8 powerpc-darwin9-apple: build fails at build/gencfn-macros

[kencu (Ken)]

I'd like to use this ticket to track the potential success of building gcc8 on PPC Leopard and Tiger.

On PPC Leopard the build proceeds a reasonable distance until:

/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/build/./prev-gcc/xg++ -B/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/build/./prev-gcc/ -B/opt/local/ppc-apple-darwin9/bin/ -nostdinc++ -B/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/build/prev-ppc-apple-darwin9/libstdc++-v3/src/.libs -B/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/build/prev-ppc-apple-darwin9/libstdc++-v3/libsupc++/.libs  -isystem /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/build/prev-ppc-apple-darwin9/libstdc++-v3/include/ppc-apple-darwin9  -isystem /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/build/prev-ppc-apple-darwin9/libstdc++-v3/include  -isystem /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/libstdc++-v3/libsupc++ -L/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/build/prev-ppc-apple-darwin9/libstdc++-v3/src/.libs -L/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/build/prev-ppc-apple-darwin9/libstdc++-v3/libsupc++/.libs   -g -O2 -mdynamic-no-pic  -gtoggle -DIN_GCC     -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -static-libstdc++ -static-libgcc   -o build/gencfn-macros \
	    build/gencfn-macros.o build/errors.o build/hash-table.o build/vec.o build/ggc-none.o .././libiberty/libiberty.a
build/genenums /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/common.md /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/config/rs6000/rs6000.md \
	   > tmp-enums.c
/bin/sh /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/../move-if-change tmp-enums.c insn-enums.c
echo timestamp > s-enums
build/genconstants /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/common.md /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/config/rs6000/rs6000.md \
	   > tmp-constants.h
/bin/sh /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/../move-if-change tmp-constants.h insn-constants.h
echo timestamp > s-constants
build/gencfn-macros -c \
	  > tmp-case-cfn-macros.h

build/gencfn-macros: DEF_INTERNAL_FLT_FN (ACOS) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (ASIN) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (ATAN) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (COS) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (EXP) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (EXP10) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (EXP2) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (EXPM1) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LOG) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LOG10) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LOG1P) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LOG2) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LOGB) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (SIN) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (SQRT) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (TAN) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (CEIL) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (FLOOR) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (RINT) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (ROUND) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (TRUNC) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (ATAN2) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (FMOD) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (POW) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (SCALB) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (FMIN) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (FMAX) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_FLT_FN (LDEXP) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_INT_FN (CLRSB) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_INT_FN (CLZ) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_INT_FN (CTZ) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_INT_FN (FFS) has no associated built-in functions
build/gencfn-macros: DEF_INTERNAL_INT_FN (PARITY) has no associated built-in functions
make[3]: *** [s-case-cfn-macros] Error 1
make[3]: *** Waiting for unfinished jobs....

[kencu (Ken)]

first build attempt gcc 8.2.0 20180915

[kencu (Ken)]

And that looks to be this bug <​https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85669>, as confirmed by Ryan in that ticket.

[kencu (Ken)]

So, a brute-force way past that error is to simply delete the offending definitions out of ${worksrcdir}/gcc/internal-fn.def.

build/gencfn-macros then seems to have no errors:

build/gencfn-macros -c \
	  > tmp-case-cfn-macros.h

and proceeds apace, but later on, perhaps not surprisingly:

/usr/bin/g++-4.2 -arch ppc -std=gnu++98 -fno-PIE -c   -g -mdynamic-no-pic -DIN_GCC    -fno-strict-aliasing -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wwrite-strings -Wcast-qual -Wno-format -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common  -DHAVE_CONFIG_H -I. -I. -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/. -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/../include -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/../libcpp/include -I/opt/local/include -I/opt/local/include -I/opt/local/include  -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/../libdecnumber -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/../libdecnumber/dpd -I../libdecnumber -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/../libbacktrace -I/opt/local/include -I/opt/local/include -o builtins.o -MT builtins.o -MMD -MP -MF ./.deps/builtins.TPo /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/builtins.c
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/builtins.c: In function ‘internal_fn associated_internal_fn(tree_node*)’:
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/builtins.c:2049: error: ‘IFN_EXP10’ was not declared in this scope
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/builtins.c:2052: error: ‘IFN_REMAINDER’ was not declared in this scope
/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc8/gcc8/work/gcc-8.2.0/gcc/builtins.c:2057: error: ‘IFN_LDEXP’ was not declared in this scope
make[3]: *** [builtins.o] Error 1

[kencu (Ken)]

Interestingly, powerpc-darwin8-apple (Tiger PPC) just breezes right on past this error without any intervention in internal-fn.def, and continues on with the gcc8 build.

That doesn't surprise me -- there is something seriously troublesome about the finer details of the <math.h> functionality on Leopard that we have seen before.

[kencu (Ken)]

It would appear that these internal math functions were added here <​https://github.com/gcc-mirror/gcc/commit/1f24b8e93a813987ee9051c5ab554ea6d48a7b13#diff-4f175686003dda5a210d9507687045ab> and (not surprisingly) powerpc-darwin*-apple was not exactly a tested system at the time of implementation.

I wonder if we can just somehow toggle them off?

[kencu (Ken)]

And just to make it a little more difficult, i386-darwin9-apple fails with a completely different error:

:info:build ld: warning: could not create compact unwind for std::basic_string<char, std::char_traits<char>, std::allocator<char> >::replace(unsigned long, unsigned long, char const*, unsigned long): dwarf uses DW_CFA_GNU_args_size
:info:build ld: illegal text-relocoation (direct reference) to (global,weak) loc_list_hasher::equal(dw_loc_list_struct const*, dw_loc_list_struct const*) in libbackend.a(dwarf2out.o) from anon in libbackend.a(dwarf2out.o) for architecture i386
:info:build collect2: error: ld returned 1 exit status

[kencu (Ken)]

gcc 8.2.0 darwin9 Leopard fail log 20180915

[kencu (Ken)]

somewhere along the line Iain or someone else at gcc fixed this, and gcc8 now builds fine on PowerPC Leopard.