The configure script has some simple tests that pick up libiconv when it
is installed. By passing --without-iconv these tests can be skipped so
the configure script falls back on a more standard iconv test that tests
libc before libiconv. However, this fall-back does not set CFLAGS/LDFLAGS
correctly when libiconv needs to be used, so only pass --without-iconv
when libc iconv needs to be used (ICONV_LIB empty).
PR: ports/186688
Approved by: garga (maintainer)
91b4789c38