Re: gdb/head build, --with-python= FAILs @ "no usable python found " ?

Christian Biesinger
2020-03-25T22:56:08Z

On Wed, Mar 25, 2020 at 5:51 PM PGNet Dev <pgnet.dev@gmail.com> wrote:
>
> On 3/25/20 3:24 PM, Christian Biesinger wrote:
> > GDB uses basically this commandline to find the linker flags:
> > python3.8 ./gdb/python-config.py --ldflags
>
> just checking, that's just a typo right? not expected in config/source at that path?
>
> this
>
> ./gdb/python-config.py
>
> does not exist.
>
> rather
>
> find . | Grep python-config
> ./gdb/python/python-config.py
>
> that, from shell in the env that the build occurs,
>
> cd src/binutils-gdb
> python3.8 ./gdb/python/python-config.py --ldflags
>
> correctly returns
>
> -lpython3.8 -lcrypt -lpthread -ldl -lutil -lm -lm -Xlinker -export-dynamic
>
> which should be fine for LDFLAGS

Sorry, yes, that one. Well it's not fine because it still needs an
-L/usr/local/pyenv/versions/3.8-dev/lib option too...

>
> > or pass LDFLAGS=/usr/local/pyenv/versions/3.8-dev/lib/ to configure.
>
> using usual '-L/path' var

Sorry, yes, forgot the -L.

>
> export LDFLAGS="-L/usr/local/pyenv/versions/3.8-dev/lib"
> (does this^ need to be rpath'd? need to poke around in here ...)

If you can run python3.8, you probably already set things up correctly for that?

>
> ./configure \
> --prefix=/usr/local/gdb-test \
> --with-python=/usr/local/pyenv/versions/3.8-dev
> make V=1
>
> _does_ seem to get past the 'python unfound' problem, dropping me into the next issue ... which seems unrelated

Yeah. Unfortunately I have no idea about that error, hopefully someone
else can comment.

>
> ...
> /usr/bin/g++-10 -O3 -Wall -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fmessage-length=0 -grecord-gcc-switches -march=native -mtune=native -std=c++17 -I. -I. -I./../gdb/regformats -I./.. -I./../include -I./../gdb -I./../gnulib/import -I../gnulib/import -I./.. -I.. -O3 -Wall -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fmessage-length=0 -grecord-gcc-switches -march=native -mtune=native -D_FORTIFY_SOURCE=2 -pthread -Wall -Wpointer-arith -Wno-unused -Wunused-value -Wunused-variable -Wunused-function -Wno-switch -Wno-char-subscripts -Wempty-body -Wunused-but-set-parameter -Wunused-but-set-variable -Wno-sign-compare -Wno-error=maybe-uninitialized -Wno-mismatched-tags -Wsuggest-override -Wimplicit-fallthrough=3 -Wduplicated-cond -Wshadow=local -Wdeprecated-copy -Wdeprecated-copy-dtor -Wredundant-move -Wmissing-declarations -Wstrict-null-sentinel -Wformat -Wformat-nonliteral -Werror -DGDBSERVER -c -o linux-low.o -MT linux-low.o -MMD -MP -MF ./.deps/linux-low.Tpo linux-low.cc
> In file included from gdb_proc_service.h:22,
> from linux-low.h:27,
> from linux-low.cc:20:
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:179:1: note: in expansion of macro ‘PS_EXPORT’
> 179 | PS_EXPORT (ps_get_thread_area);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:180:1: note: in expansion of macro ‘PS_EXPORT’
> 180 | PS_EXPORT (ps_getpid);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:181:1: note: in expansion of macro ‘PS_EXPORT’
> 181 | PS_EXPORT (ps_lcontinue);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:182:1: note: in expansion of macro ‘PS_EXPORT’
> 182 | PS_EXPORT (ps_lgetfpregs);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:183:1: note: in expansion of macro ‘PS_EXPORT’
> 183 | PS_EXPORT (ps_lgetregs);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:184:1: note: in expansion of macro ‘PS_EXPORT’
> 184 | PS_EXPORT (ps_lsetfpregs);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:185:1: note: in expansion of macro ‘PS_EXPORT’
> 185 | PS_EXPORT (ps_lsetregs);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:186:1: note: in expansion of macro ‘PS_EXPORT’
> 186 | PS_EXPORT (ps_lstop);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:187:1: note: in expansion of macro ‘PS_EXPORT’
> 187 | PS_EXPORT (ps_pcontinue);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:188:1: note: in expansion of macro ‘PS_EXPORT’
> 188 | PS_EXPORT (ps_pdread);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:189:1: note: in expansion of macro ‘PS_EXPORT’
> 189 | PS_EXPORT (ps_pdwrite);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:190:1: note: in expansion of macro ‘PS_EXPORT’
> 190 | PS_EXPORT (ps_pglobal_lookup);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:191:1: note: in expansion of macro ‘PS_EXPORT’
> 191 | PS_EXPORT (ps_pstop);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:192:1: note: in expansion of macro ‘PS_EXPORT’
> 192 | PS_EXPORT (ps_ptread);
> | ^~~~~~~~~
> ./../gdbsupport/gdb_proc_service.h:177:50: error: expected constructor, destructor, or type conversion before ‘(’ token
> 177 | __attribute__((visibility ("default"))) typeof (SYM) SYM
> | ^
> ./../gdbsupport/gdb_proc_service.h:193:1: note: in expansion of macro ‘PS_EXPORT’
> 193 | PS_EXPORT (ps_ptwrite);
> | ^~~~~~~~~
> make[2]: *** [Makefile:545: linux-low.o] Error 1
> make[2]: Leaving directory '/usr/local/src/binutils-gdb/gdbserver'
> make[1]: *** [Makefile:11295: all-gdbserver] Error 2
> make[1]: Leaving directory '/usr/local/src/binutils-gdb'
> make: *** [Makefile:854: all] Error 2