SAGE_SPKG_CONFIGURE([arb], [
    AC_CHECK_HEADER(arb.h, [], [sage_spkg_install_arb=yes])
dnl below function added in version 2.16 of arb 
    AC_SEARCH_LIBS([acb_mat_eig_simple], [arb], [break], [sage_spkg_install_arb=yes])

we also take care of non-standard naming of arb's dylib here.

configure tarball http://users.ox.ac.uk/~coml0531/sage/configure-b5de8991395bbf58e663e69d6250de656897c4e2.tar.gz

Upstream: Reported upstream. No feedback yet.

CC: @embray @jdemeyer @tobihan @kiwifb

Component: build

Author: Dima Pasechnik, Isuru Fernando

Branch: 29d4ce2

Reviewer: François Bissey, Isuru Fernando

Issue created by migration from https://trac.sagemath.org/ticket/27270