PIVX: Latest OpenSSL 1.1.0e incorrectly detected as LibreSSL during build

Describe the issue

After updating to OpenSSL 1.1.0e I can no longer build. configure fails with:

configure: error: Detected LibreSSL: This is NOT supported, and may break consensus compatibility!

I don’t have LibreSSL anywhere on my system though. I tried configure --with-libressl which runs successfully but then make fails:

Making all in src
make[1]: Entering directory '/mnt/tank/projects/PIVX/src'
make[2]: Entering directory '/mnt/tank/projects/PIVX/src'
  CXX      libbitcoinconsensus_la-allocators.lo
  CXX      primitives/libbitcoinconsensus_la-transaction.lo
  CXX      crypto/libbitcoinconsensus_la-hmac_sha512.lo
  CXX      crypto/libbitcoinconsensus_la-scrypt.lo
  CXX      crypto/libbitcoinconsensus_la-sha1.lo
  CXX      crypto/libbitcoinconsensus_la-sha256.lo
  CXX      crypto/libbitcoinconsensus_la-sha512.lo
  CXX      crypto/libbitcoinconsensus_la-ripemd160.lo
  CXX      libbitcoinconsensus_la-eccryptoverify.lo
  CXX      libbitcoinconsensus_la-ecwrapper.lo
ecwrapper.cpp: In function ‘int {anonymous}::ECDSA_SIG_recover_key_GFp(EC_KEY*, ECDSA_SIG*, const unsigned char*, int, int, int)’:
ecwrapper.cpp:62:28: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
     if (!BN_add(x, x, ecsig->r)) {
                            ^~
In file included from ecwrapper.h:11:0,
                 from ecwrapper.cpp:5:
/usr/include/openssl/ec.h:1044:16: note: forward declaration of ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
 typedef struct ECDSA_SIG_st ECDSA_SIG;
                ^~~~~~~~~~~~
ecwrapper.cpp:118:34: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
     if (!BN_mod_inverse(rr, ecsig->r, order, ctx)) {
                                  ^~
In file included from ecwrapper.h:11:0,
                 from ecwrapper.cpp:5:
/usr/include/openssl/ec.h:1044:16: note: forward declaration of ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
 typedef struct ECDSA_SIG_st ECDSA_SIG;
                ^~~~~~~~~~~~
ecwrapper.cpp:123:31: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
     if (!BN_mod_mul(sor, ecsig->s, rr, order, ctx)) {
                               ^~
In file included from ecwrapper.h:11:0,
                 from ecwrapper.cpp:5:
/usr/include/openssl/ec.h:1044:16: note: forward declaration of ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
 typedef struct ECDSA_SIG_st ECDSA_SIG;
                ^~~~~~~~~~~~
ecwrapper.cpp: In member function ‘bool CECKey::Recover(const uint256&, const unsigned char*, int)’:
ecwrapper.cpp:221:31: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
     BN_bin2bn(&p64[0], 32, sig->r);
                               ^~
In file included from ecwrapper.h:11:0,
                 from ecwrapper.cpp:5:
/usr/include/openssl/ec.h:1044:16: note: forward declaration of ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
 typedef struct ECDSA_SIG_st ECDSA_SIG;
                ^~~~~~~~~~~~
ecwrapper.cpp:222:32: error: invalid use of incomplete type ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
     BN_bin2bn(&p64[32], 32, sig->s);
                                ^~
In file included from ecwrapper.h:11:0,
                 from ecwrapper.cpp:5:
/usr/include/openssl/ec.h:1044:16: note: forward declaration of ‘ECDSA_SIG {aka struct ECDSA_SIG_st}’
 typedef struct ECDSA_SIG_st ECDSA_SIG;
                ^~~~~~~~~~~~
make[2]: *** [Makefile:6085: libbitcoinconsensus_la-ecwrapper.lo] Error 1
make[2]: Leaving directory '/mnt/tank/projects/PIVX/src'
make[1]: *** [Makefile:6949: all-recursive] Error 1
make[1]: Leaving directory '/mnt/tank/projects/PIVX/src'
make: *** [Makefile:592: all-recursive] Error 1

What version of PIVX Core are you using?

Latest master, commit id 6b5cf7f8b

Machine specs:

• OS: Arch Linux

Any extra information that might be useful in the debugging process.

config.log here