Python failed `make` when building from source if `--enabled-share` is pass in when running `./configure`.

````
...(some output which seem irrevelent)
/bin/ld: /home/e38160wl/Python3.7.4/local/lib/libssl.a(s3_meth.o): relocation R_X86_64_32 against `.rodata' can not be used when making a shared object; recompile with -fPIC
/home/e38160wl/Python3.7.4/local/lib/libssl.a: error adding symbols: Bad value
collect2: error: ld returned 1 exit status
ln: failed to access ‘libpython3.7m.so.1.0’: No such file or directory
make: *** [libpython3.7m.so] Error 1

````

I tried adding `CFLAGS="-fPIC"` as parameter of `./configure` but it does not make any changes

Could you add some more details about what you're doing here, such as OS, OS version, compiler and compiler version, etc.?  We routinely test `--enable-shared` builds on both Linux and FreeBSD in our post-merge buildbot setup, and have not had any issues with this.

I also note that the error mentions `libssl.a`; what version of which SSL library are you using?

Sorry for that,

Heres are my os infomation:
LSB Version:	:core-4.1-amd64:core-4.1-ia32:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-ia32:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-ia32:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch
Distributor ID:	Scientific
Description:	Scientific Linux release 7.3 (Nitrogen)
Release:	7.3
Codename:	Nitrogen

I am using Linux as follows:
Linux e-c07kilf3145.it.manchester.ac.uk 3.10.0-514.el7.x86_64 #1 SMP Thu Nov 3 15:10:49 CDT 2016 x86_64 x86_64 x86_64 GNU/Linux

I am using the latest openssl release:
2019-Sep-10 13:53:14  	openssl-1.0.2t.tar.gz

*I made a change in the Modules/Setup.dist as my openssl is not in the default location:
# Socket module helper for SSL support; you must comment out the other
# socket line above, and possibly edit the SSL variable:
SSL=/home/e38160wl/local/openssl
ssl_path=/home/e38160wl/local
_ssl _ssl.c \
	-DUSE_SSL -I$(ssl_path)/include -I$(ssl_path)/include/openssl \
	-L$(ssl_path)/lib -lssl -lcrypto

Sorry I mistype the changes I made in Modules/Setup.dist, this is the correct one:
# Socket module helper for SSL support; you must comment out the other
# socket line above, and possibly edit the SSL variable:
SSL=/home/e38160wl/Python3.7.4/local/openssl
ssl_path=/home/e38160wl/Python3.7.4/local
_ssl _ssl.c \
	-DUSE_SSL -I$(ssl_path)/include -I$(ssl_path)/include/openssl \
	-L$(ssl_path)/lib -lssl -lcrypto

I believe the better option would be to pass `CPPFLAGS=-I/home/e38160wl/local/openssl/include LDFLAGS=-L/home/e38160wl/local/openssl/lib` instead of editing Setup[.dist].  Could you give that a try?

Otherwise, this may be an issue with the way OpenSSL was built; you could try leaving out all SSL-related changes and see if everything but `_ssl` and `_hashlib` builds correctly.

That works, but I notice some message somewhere near the end of running `make`:
running build
running build_ext
INFO: Can't locate Tcl/Tk libs and/or headers

Python build finished successfully!
The necessary bits to build these optional modules were not found:
_bz2                  _hashlib              _lzma              
_sqlite3              _ssl                  _tkinter           
_uuid                 readline                                 
To find the necessary bits, look in setup.py in detect_modules() for the module's name.


The following modules found by detect_modules() in setup.py, have been
built by the Makefile instead, as configured by the Setup files:
_abc                  atexit                pwd                
time                                                           


Could not build the ssl module!
Python requires an OpenSSL 1.0.2 or 1.1 compatible libssl with X509_VERIFY_PARAM_set1_host().
LibreSSL 2.6.4 and earlier do not provide the necessary APIs, https://github.com/libressl-portable/portable/issues/381

And after `make install`, python is not running as expected:
$ python3
python3: error while loading shared libraries: libpython3.7m.so.1.0: cannot open shared object file: No such file or directory

not sure if it is related but I am installing Python in a different directory and I have added that to the prefix option when runnning configure.

Ok, that shows that the issue is not actually with the Python build, but with trying to find the right incantation for both OpenSSL and Python to get what you want :).  As such I'm going to go ahead and close the issue.

As for getting you going, there is a bit of headache involved in getting the dynamic library search path correct; if you're installing in exotic locations, you may need to add entries in `/etc/ld.conf.d/` (and run `ldconfig`).  Hopefully this gives you enough hints to search for to get you to where you want!