tree 675ed6b06d3823d6c4f15c87751dff7c60bc21f4
parent bff157a0c6f91cb8c4894c0e7f116af2d0a1d041
author Guinevere Larsen <guinevere@redhat.com> 1737661373 -0300
committer Guinevere Larsen <guinevere@redhat.com> 1738066008 -0300

gdb/configure: fail configure if all targets requested with 32bit bfd

As PR sim/28684 explains, it isn't possible to compile GDB with all
targets enabled and not enabling 64 bit bfd. In 64 bit hosts, 64 bit bfd
is forced, so the build works, but in 32 bit hosts, that has to be
explicitly enabled.

I ran into this when I tried compiling GDB on a mips64 machine running a
32 bit OS. Along with the errors in the PR, several other architectures
are also required, notably aarch64 and other explicitly 64bit targets.
Additionally, some 32 bit files required for the gdb mips target aren't
added to the makefile.

Considering the last comment in the bug says this isn't going to be
fixed on the binutils side, I didn't think it was worth trying to fix
the GDB side. Instead, this commit causes the configure script to fail
if all targets were requested and 64 bit bfd isn't enabled. If that is
ever fixed, we can revert this commit.

I considered adding this to the top level configure script, but couldn't
figure out how to detect the situation in there, so this was my next
best idea.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28684
Approved-by: Kevin Buettner <kevinb@redhat.com>