Re: [Libguestfs] Add support for musl libc
On Mon, Aug 01, 2016 at 08:24:43PM +0200, Jakub Jirutka wrote:
Hi,
I’m trying to compile libguestfs on Alpine Linux, that uses musl
libc (lightweight, fast and simple standards-conformance libc). It
fails in the check phase due to missing glibc-style extended printf
formatters.
--
checking for register_printf_specifier... no
checking for register_printf_function... no
configure: error: in `/tmp/libguestfs/src/libguestfs-1.32.6’:
configure: error: No support for glibc-style extended printf formatters.
This means you either have a very old glibc (pre-2.0) or you
are using some other libc where this is not supported.
See `config.log’ for more details
--
Could you please add support for musl libc, i.e. avoid using
glibc-specific extensions? How often are such non-standard functions
used in the libguestfs code-base; can we just patch few occurrences
or is it too widespread?
If you grep for %Q or %R you'll see the uses of these custom printf
specifiers. They are IMHO very useful, as well as being a cool
feature of glibc. How about adding them to musl libc?
Alternatively I notice that gnulib has an (unimplemented, sadly)
replacement register_printf_*, so that could be implemented which
would fix portability to BSD too.
It's a shame that ISO or POSIX doesn't standardize a way to do this.
Rich.
--
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