Re: [Bug-wget] Wget 1.16.1 detection of non-system openssl broken on MacOSX.

[Jochen Roderburg]

Hi Tim,

Am 16.12.2014 um 14:00 schrieb Tim Ruehsen:

> That is not so easy, since when having --with-libssl-prefix=/usr/local/ssl,
> you can't just
> OPENSSL_CFLAGS=$with_libssl_prefix/include
> OPENSSL_LIBS=$with_libssl_prefix/lib
> You also have to manually specify the libraries you want to link with... this
> can be different on different systems.

You are right, and this does also not ensure that the wanted libraries 
are actually used at run-time, on Linux e.g. the OPENSSL_LIBS must also 
somehow be in the dynamic library load path.

> So I decided to set PKG_CONFIG_PATH before the check and unset it afterwards.
> It works for me... but I failed to test it without pkg-config. Without pkg-
> config I couldn't get autoreconf working :-(

Unfortunately this approach has the same problems as it also does not do 
more than set the inlcude and lib paths.


I made the following experiments on my Linux:

Installed a current OPENSSL from source in /usr/local/openssl (with 
openssl configure:  ./config --prefix=/usr/local/openssl shared)

Configured and built wget 1.16.1 with your PKG_CONFIG_PATH patch (with 
wget configure: configure --with-ssl=openssl 
--with-libssl-prefix=/usr/local/openssl).

With an active pkg-config program I see now the following in the config 
summary:
CFlags:  -I/usr/include/uuid   -I/usr/local/openssl/include 
-DHAVE_LIBSSL   -DNDEBUG
Libs:    -lpcre   -luuid   -L/usr/local/openssl/lib -lssl -lcrypto -lz 
  -lidn

So the compile and link phase will use the wanted files, but a ldd on 
the resulting wget binary still shows:

        libssl.so.1.0.0 => /lib/libssl.so.1.0.0
        libcrypto.so.1.0.0 => /lib/libcrypto.so.1.0.0

With a deactivated pkg-config program the old library detection code 
seems to be used and I get:

CFlags:   -DNDEBUG -I/usr/local/openssl/include
Libs:     /usr/local/openssl/lib/libssl.so 
/usr/local/openssl/lib/libcrypto.so
          Wl,-rpath -Wl,/usr/local/openssl/lib/ -ldl -lz  -lidn -luuid 
-lpcre

and ldd shows now:

        libssl.so.1.0.0 => /usr/local/openssl/lib/libssl.so.1.0.0
        libcrypto.so.1.0.0 => /usr/local/openssl/lib/libcrypto.so.1.0.0

The wanted openssl libraries are inserted here with full path names and 
really used.


Therefore I see now only one possibility to keep these two prefix 
options without more problems and new questions, namely skip the 
pkg-config based completely for the SSL libraries if these options are
used.

Regards, Jochen