Re: Unable to build GDB 13.1 on Solaris 11.3 Sparc

[Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>]

Nemo Nusquam via Gdb <gdb@sourceware.org> writes:

> I am trying (and failing) to build GDB 13.1 on Solaris 11.3 Sparc.
>
> Here is my configuration script.
>
> CXXFLAGS='-g3 -O0' \
> CFLAGS='-g3 -O0' \

Why?  Do you want/need to debug the resulting gdb itself?  Otherwise,
just leave the defaults (-g -O2).

> NM=/usr/bin/gnm \
> SHELL=/usr/bin/bash \

Probably rather CONFIG_SHELL.  Btw., it's often best to have
/usr/gnu/bin before /usr/bin in $PATH: configure scripts sometimes
assume the GNU tools and fail in weird ways with the native ones.

> AR=/usr/bin/gar \
> AS=/usr/bin/as \

Unnecessary for gdb.  Even when building gcc, use --with-as=/usr/bin/as
--without-gnu-as as documented in the installation guide.  Relying on
$PATH is risky and fragile.

> CC=/home/build/gcc/git/bin/gcc \
> CXX=/home/build/gcc/git/bin/g++ \

I suppose this is a 32-bit-default gcc (i.e. configured for
sparc-sun-solaris2.11, not sparcv9-sun-solaris2.11)?  Any reason not to
use the bundled gcc 7.3.0?  That one is 64-bit-default.

> ../configure \
> --with-mpc=/usr/local \
> --with-gmp=/usr/local \
> --with-mpfr=/usr/local \
> --enable-64-bit-bfd \
> --enable-tui \
> --with-curses \
> --disable-bootstrap \

This is gcc only, thus unnecessary for a gdb build.

> --disable-binutils \
> --disable-ld \
> --disable-gprof \
> --disable-gprofng \
> --disable-gold \
> --disable-gas \
> --disable-sim

If you're building from the gdb 13.1 tarball, you can omit those.  Btw.,
--disable-binutils is harmful: gdb depends on libbfd and won't link
without, as you've discovered.

> (Some flags taken from https://sourceware.org/gdb/wiki/BuildingNatively .)

In general, please start with the bare minimum of configure flags (like
the --with-* stuff).  Unless you known 200% what you're doing,
additional flags usually cause more harm then anything.

> The makefile creates ./gdb inside the build directory and then stops as
> follows:
>
> checking for libgmp... no
> configure: error: GMP is missing or unusable
> gmake[1]: *** [Makefile:11447: configure-gdb] Error 1
> gmake[1]: Leaving directory '/home/build/opt/gdb-13.1/bld'

You can find the exact errors in gdb/config.log.  Consulting that is
usually necessary to determine what exactly went wrong.

> I have libgmp (and building gcc 13 uses it) in /usr/local/lib:
>
> /usr/local/lib/libgmp.a:        current ar archive, 32-bit symbol table
> /usr/local/lib/libgmp.la:       commands text
> /usr/local/lib/libgmp.so:       ELF 64-bit MSB dynamic lib SPARCV9 Version
> 1, UltraSPARC3 Extensions Required, dynamically linked, not stripped, no
> debugging information available
> /usr/local/lib/libgmp.so.10:    ELF 64-bit MSB dynamic lib SPARCV9 Version
> 1, UltraSPARC3 Extensions Required, dynamically linked, not stripped, no
> debugging information available
> /usr/local/lib/libgmp.so.10.4.1:        ELF 64-bit MSB dynamic lib SPARCV9
> Version 1, UltraSPARC3 Extensions Required, dynamically linked, not
> stripped, no debugging information available
>
> Now I note that the Makefile is compiling to 32-bit objects but I have a
> 32-bit libgmp.a.  (I tried adding "-m64" but that caused other problems.)

Such as?  Please include the details so we can help.

> I am stumped.  How do I proceed?

Since your libgmp is 64-bit, you need to ensure a 64-bit build.  You can
achieve this either by using a 64-bit-default gcc/g++ or adding -m64 to
CC/CXX.  Adding it to CFLAGS/CXXFLAGS often doesn't work as expected,
unfortunately.

You should also add --build sparcv9-sun-solaris2.11 to the configure
flags.  config.guess has been badly messed with on Solaris in recent
times and misdetects the 64-bit triple.  I've given up fighting the
upstream chaos here and usually specify the correct triple explicitly.

Hope this helps.

	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University