$ make
Running Mkbootstrap for Net::SSLeay ()
chmod 644 SSLeay.bs
mips-openwrt-linux-uclibc-gcc -c   -D_REENTRANT -D_GNU_SOURCE -Os -pipe -mno-branch-likely -mips32r2 -mtune=34kc -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result -msoft-float -I/data3/openwrt-cc-ar71xx/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/include -I/data3/openwrt-cc-ar71xx/staging_dir/target-mips_34kc_uClibc-0.9.33.2/include -I/data3/openwrt-cc-ar71xx/staging_dir/toolchain-mips_34kc_gcc-4.8-linaro_uClibc-0.9.33.2/usr/include -I/data3/openwrt-cc-ar71xx/staging_dir/toolchain-mips_34kc_gcc-4.8-linaro_uClibc-0.9.33.2/include -O2   -DVERSION=\"1.84\" -DXS_VERSION=\"1.84\" -fPIC "-I/usr/lib/perl5/5.20/CORE"   SSLeay.c
SSLeay.xs:140:20: fatal error: EXTERN.h: No such file or directory
 #include "EXTERN.h"
                    ^
compilation terminated.
make: *** [SSLeay.o] Error 1