Provide GCC 14

[eschnett]

It seems that Rust isn't well supported in GCC 12 or 13. The release notes of GCC 14 promise much better support, including support for vector extensions. It would be convenient to provide GCC 14 in BinaryBuilder.

[eschnett]

I have a prototype implementation of GCC 14.2. It's difficult to build old glibc versions with it so I'm building glibc 2.35 at the moment. Please advise.

• Is GCC 14.2 the right version to target?
• Is it possible to use glibc 2.35? If not, which older version would be acceptable? Is it necessary to remain with the antediluvian 2.17?

[giordano]

It seems that Rust isn't well supported in GCC 12 or 13.

I presume you meant RISC-V instead of Rust 🙂

It's difficult to build old glibc versions with it so I'm building glibc 2.35 at the moment.

For architetuctures like x86_64 which have thousands of systems around still running Red Hat 7 (in extended support up to 2027 or 28, don't remember), which ships with glibc 2.17 that's a no-go. RISC-V is different because it's a much more recent architecture, with only few usable (for Julia workloads) boards, we have less constraints about it.

[giordano]

Can you please elaborate on what's the issue with glibc 2.17?

[eschnett]

The particular error I'm seeing is that it complains that the flag --no-whole-archive or somesuch is not supported.

[giordano]

That's a linker option (which we use often), I'm missing the connection with the glibc version.

[eschnett]

The failing command is

sandbox:${WORKSPACE}/srcdir/glibc_build # ${WORKSPACE}/srcdir/glibc-*/configure --prefix=/usr --host=${COMPILER_TARGET} --build=${HOST_TARGET} --with-headers="${sysroot}/usr/include" --disable-multilib --disable-werror ${GLIBC_CONFIGURE_OVERRIDES[@]}

and the error message is

[20:58:03] checking for ld --no-whole-archive... no
[20:58:03] configure: error: support for --no-whole-archive is needed

This error is not there with glibc 2.35. (I haven't investigated the error.)

[giordano]

Usual suggestion: read the log file, the actual error may be different than what printed to screen.