Error with libcrypto

[vuongnch57]

Hi. First, thanks in advance for your project.
I try to build and run the server following your readme. But when I run "make h2o", I got an error:
Linking C executable h2o
/usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In function dlfcn_globallookup': dso_dlfcn.c:(.text+0x21): undefined reference todlopen'
dso_dlfcn.c:(.text+0x34): undefined reference to dlsym' dso_dlfcn.c:(.text+0x3f): undefined reference todlclose'
/usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In function dlfcn_bind_func': dso_dlfcn.c:(.text+0x354): undefined reference todlsym'
dso_dlfcn.c:(.text+0x3fb): undefined reference to dlerror' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In functiondlfcn_bind_var':
dso_dlfcn.c:(.text+0x474): undefined reference to dlsym' dso_dlfcn.c:(.text+0x52e): undefined reference todlerror'
/usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In function dlfcn_load': dso_dlfcn.c:(.text+0x5a4): undefined reference todlopen'
dso_dlfcn.c:(.text+0x612): undefined reference to dlclose' dso_dlfcn.c:(.text+0x640): undefined reference todlerror'
/usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In function dlfcn_pathbyaddr': dso_dlfcn.c:(.text+0x6be): undefined reference todladdr'
dso_dlfcn.c:(.text+0x721): undefined reference to dlerror' /usr/local/ssl/lib/libcrypto.a(dso_dlfcn.o): In functiondlfcn_unload':
dso_dlfcn.c:(.text+0x77a): undefined reference to `dlclose'
collect2: ld returned 1 exit status
make[3]: *** [h2o] Error 1
make[2]: *** [CMakeFiles/h2o.dir/all] Error 2
make[1]: *** [CMakeFiles/h2o.dir/rule] Error 2
make: *** [h2o] Error 2
Can you tell me how can I fix it?

[kazuho]

What is the OS (or linux distro?) are you using? Did you build libcrypto (which is part of OpenSSL) by yourself?

It seems like that on your environment libcrypto wants to link to libdl, so adding dl after pthread at the last line of CMakeLists.txt might fix the problem.

[vuongnch57]

Yes.I built libcrypto with OpenSSL.I follow your suggestion and now the h2o server is working perfectly. Thanks a lot

[kazuho]

Your welcome!