The compiler error about modifying libcrypto

Hi misc@,

Greeting from me!

My OS is OpenBSD 6.3. Since now the -current modify the interface of
libcrypto, there is error in "make":
......
===> lib/libcrypto
cc -O2 -pipe -g -Wall -Wundef -Werror -DLIBRESSL_INTERNAL -DDSO_DLFCN
-DHAVE_DLFCN_H -DHAVE_FUNOPEN -DOPENSSL_NO_HW_PADLOCK
-I/usr/src/lib/libcrypto -I/usr/src/lib/libcrypto/asn1
-I/usr/src/lib/libcrypto/bn -I/usr/src/lib/libcrypto/evp
-I/usr/src/lib/libcrypto/modes -I/usr/src/lib/libcrypto/obj -DAES_ASM
-DBSAES_ASM -DVPAES_ASM -DOPENSSL_IA32_SSE2 -DRSA_ASM
-DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m
-DMD5_ASM -DGHASH_ASM -DRC4_MD5_ASM -DSHA1_ASM -DSHA256_ASM
-DSHA512_ASM -DWHIRLPOOL_ASM -DOPENSSL_CPUID_OBJ -MD -MP -MD -MP -c
/usr/src/lib/libcrypto/evp/p_lib.c -o p_lib.o
/usr/src/lib/libcrypto/evp/p_lib.c:96:1: error: conflicting types for
'EVP_PKEY_size'
EVP_PKEY_size(const EVP_PKEY *pkey)
^
/usr/include/openssl/evp.h:871:5: note: previous declaration is here
int EVP_PKEY_size(EVP_PKEY *pkey);
^
1 error generated.
*** Error 1 in lib/libcrypto (<bsd.lib.mk>:41 'p_lib.o': @cc -O2 -pipe
-g -Wall -Wundef -Werror -DLIBRESSL_INTERNAL -DDSO_DLFCN
-DHAVE_DLFCN...)
*** Error 1 in lib (<bsd.subdir.mk>:48 'all')
*** Error 1 in /usr/src (<bsd.subdir.mk>:48 'all')
......

The compiler searches "/usr/include/openssl" first, so is there any
method to let compiler uses "/usr/src/lib/libcrypto/evp" as first
search path?

Thanks in advance!

Best Regards
Nan Xiao