OpenSSH-7.1p1 fails configure check with LibreSSL-2.2.4

[Austin English]

Howdy,

I'm attempting to compile openssh-7.1p1 using libressl-2.2.4 for the
ssl implementation. Unfortunately, this fails to work (tested on
Debian Unstable and Gentoo):

cd libressl-2.2.4
./configure --prefix=/opt/libressl-2.2.4 && make -j8 && sudo make install
cd ../openssh-7.1p1
./configure --with-ssl-dir=/opt/libressl-2.2.4

fails with:
checking OpenSSL header version... not found
configure: error: OpenSSL version header not found.

config.log shows:
configure:20986: checking OpenSSL header version
configure:21033: ccache gcc -o conftest -g -O2 -Wall -Wpointer-arith
-Wuninitialized -Wsign-compare -Wformat-security
-Wsizeof-pointer-memaccess -Wno-pointer-sign -Wno-unused-result
-fno-strict-aliasing -D_FORTIFY_SOURCE=2 -ftrapv -fno-builtin-memset
-fstack-protector-strong -fPIE -I/opt/libressl-2.2.4//include
-L/opt/libressl-2.2.4//lib  -Wl,-z,relro -Wl,-z,now -Wl,-z,noexecstack
-fstack-protector-strong -pie conftest.c -lcrypto -ldl -lutil -lz
-lnsl  >&5
conftest.c: In function 'main':
conftest.c:225:4: warning: implicit declaration of function 'exit'
[-Wimplicit-function-declaration]
    exit(1);
    ^
conftest.c:225:4: warning: incompatible implicit declaration of
built-in function 'exit'
conftest.c:225:4: note: include '<stdlib.h>' or provide a declaration of 'exit'
conftest.c:227:25: warning: format '%x' expects argument of type
'unsigned int', but argument 3 has type 'long int' [-Wformat=]
   if ((rc = fprintf(fd ,"%08x (%s)\n", OPENSSL_VERSION_NUMBER,
OPENSSL_VERSION_TEXT)) <0)
                         ^
conftest.c:228:4: warning: incompatible implicit declaration of
built-in function 'exit'
    exit(1);
    ^
conftest.c:228:4: note: include '<stdlib.h>' or provide a declaration of 'exit'
conftest.c:230:3: warning: incompatible implicit declaration of
built-in function 'exit'
   exit(0);
   ^
conftest.c:230:3: note: include '<stdlib.h>' or provide a declaration of 'exit'
configure:21036: $? = 0
configure:21042: ./conftest
./conftest: error while loading shared libraries: libcrypto.so.35:
cannot open shared object file: No such file or directory

doing:
export LD_LIBRARY_PATH=/opt/libressl-2.2.4

Works around this issue, and allows OpenSSH to compile (though some
tests fail that don't with openssl-1.0.2d.

Please keep me in CC, as I'm not subscribed.

--
-Austin