[exim] Re: undefined reference to `SSL_get0_chain_certs' err…

> On Sat, Dec 16, 2023 at 09:44:59AM +0000, Ian B via Exim-users wrote:
>
> > In the meantime I think I've just got it working ok with exporting
> > LD_LIBRARY_PATH and CC=gcc -std=gnu99 -lrt -I/usr/local/ssl/
> > -L/usr/local/ssl/lib -Wl,-rpath,/usr/local/ssl/lib (not even sure those
> are
> > correct just atm)
>
> When building the custom OpenSSL, I don't find it necessary to do
> anything with CC, LD_LIBRARY_PATH, ... just:
>
>     $ dstpath=...             # whatever
>     $ libpath=$dstpath/lib    # or $dstpath/lib64, ...
>     $ Configure --prefix=$dstpath -Wl,-rpath,$libpath linux-x86_64-rpk
>     $ make            # -j<pick-a-number-cpus>
>     $ make test
>     $ sudo make install_sw
>
> When building other software against the non-default OpenSSL, you may
> need to tweak CFLAGS and LDFLAGS in various ways to make sure that:
>
>     * CFLAGS has -I$dstpath/include
>     * LDFLAGS has -L$libpath -Wl,-rpath,$libpath
>
> For example, my Fedora shell script for configuring a Postfix build
> is essentially:
>
>     OSSL=/opt/openssl/3.2
>
>     CCARGS="-I${OSSL}/include -DUSE_TLS -DHAS_PCRE=2 -DHAS_CDB -DNO_NIS"
>     AUXLIBS="$AUXLIBS -L${OSSL}/lib64 -Wl,-rpath,${OSSL}/lib64 -lssl
> -lcrypto -ldb"
>     AUXLIBS_PCRE="-lpcre2-8"
>     AUXLIBS_CDB="-lcdb"
>
>     make -f Makefile.init \
>         "CCARGS=$CCARGS" "OPT=-O -g" \
>         AUXLIBS="$AUXLIBS" \
>         AUXLIBS_PCRE="$AUXLIBS_PCRE" \
>         AUXLIBS_CDB="$AUXLIBS_CDB" \
>         makefiles
>
> The details will be different for Exim, but the basic principles should
> be the same.
>
> --
>     Viktor.
>
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