Bug#988008: mpfr4 FTBFS on musl-linux-arm64: symbol differences

[Helmut Grohne <helmut@subdivi.de>]

Source: mpfr4
Version: 4.1.0-3
Tags: ftbfs patch
User: helmutg@debian.org
Usertags: rebootstrap

mpfr4 fails to build from source on musl-linux-arm64 due to symbol
differences. mpfr4 has a number of symbols that happen to be
architecture dependent including some for arm64 (glibc). Those happen to
not be libc-dependent so the conditionalization should be extended to
non-glibc as is already done for e.g. amd64. Please consider running the
following sed command in the source tree to update the symbol file:

    sed -i -e '/^ /s/arm64/any-&/' debian/libmpfr6.symbols

Helmut