Without the attached patch, "make test" fails for me with:

/bin/sh ../../libtool --tag=CC --mode=link gcc -g0 -O2 -Wno-system-headers -L/usr/local/lib -o lib1501 lib1501.o first.o testutil.o ../../lib/libcurl.la -lz
libtool: link: gcc -g0 -O2 -Wno-system-headers -o .libs/lib1501 lib1501.o first.o testutil.o -L/usr/local/lib ../../lib/.libs/libcurl.so /usr/local/lib/libidn.so /usr/local/lib/libiconv.so -lssl -lcrypto -lz -Wl,-rpath -Wl,/usr/local/lib
lib1501.o: In function `test':
lib1501.c:(.text+0x3b2): undefined reference to `curlx_sztosi'
*** [lib1501] Error code 1

Stop in /home/fk/git/curl/tests/libtest.
*** [all-recursive] Error code 1

Stop in /home/fk/git/curl/tests.
*** [test] Error code 1

Stop in /home/fk/git/curl.

Fabian

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