[oe] [meta-oe] net-snmp: do_compile error

[Zheng, Ruoqin]

When bitbake net-snmp 5.7.3, I will meet this error, who knows the reason?

i586-poky-linux-libtool: compile:  i586-poky-linux-gcc -m32 -march=i586 -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed --sysroot=……/build/tmp/work/i586-poky-linux/net-snmp/5.7.3-r0/recipe-sysroot -I../include -I. -I../snmplib -DNETSNMP_ENABLE_IPV6 -fno-strict-aliasing -O2 -pipe -g -feliminate-unused-debug-types -fdebug-prefix-map=……/build/tmp/work/i586-poky-linux/net-snmp/5.7.3-r0=/usr/src/debug/net-snmp/5.7.3-r0 -fdebug-prefix-map=……/build/tmp/work/i586-poky-linux/net-snmp/5.7.3-r0/recipe-sysroot-native= -fdebug-prefix-map=……/build/tmp/work/i586-poky-linux/net-snmp/5.7.3-r0/recipe-sysroot= -Ulinux -Dlinux=linux -c keytools.c  -fPIC -DPIC -o .libs/keytools.o
keytools.c: In function 'generate_Ku':
keytools.c:155:25: error: dereferencing pointer to incomplete type 'EVP_MD_CTX {aka struct evp_md_ctx_st}'
     ctx = malloc(sizeof(*ctx));
                         ^~~~
keytools.c:264:9: warning: implicit declaration of function 'EVP_MD_CTX_cleanup'; did you mean 'EVP_MD_CTX_create'? [-Wimplicit-function-declaration]
         EVP_MD_CTX_cleanup(ctx);
         ^~~~~~~~~~~~~~~~~~
         EVP_MD_CTX_create
Makefile:98: recipe for target 'keytools.lo' failed

--
Zheng Ruoqin
Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST)
ADDR.: No.6 Wenzhu Road, Software Avenue,
       Nanjing, 210012, China
MAIL : zhengrq.fnst at cn.fujistu.com