'fpconv_init' declared but never defined on Alpine Linux 3.7 #53

I installed tarantool 1.8 on Alpine Linux 3.7 and now I am trying a few extra rocks.

When issuing "tarantoolctl rocks install luajwt" at the OS prompt, I see the errors below. Any idea why this might be?

Missing dependencies for luajwt 1.3-4:
luacrypto >= 0.3.2-1 (not installed)
lua-cjson >= 2.1.0 (not installed)
lbase64 >= 20120807-3 (not installed)

luajwt 1.3-4 depends on luacrypto >= 0.3.2-1 (not installed)
Installing http://rocks.moonscript.org/luacrypto-0.3.2-2.src.rock
gcc -O2 -fPIC -I/usr/local/include/tarantool -c src/lcrypto.c -o src/lcrypto.o -I/usr/include
gcc -shared -o crypto.so -L/usr/local/lib src/lcrypto.o -L/usr/lib -Wl,-rpath,/usr/lib: -lcrypto
luacrypto 0.3.2-2 is now installed in /root/.rocks (license: MIT)

luajwt 1.3-4 depends on lua-cjson >= 2.1.0 (not installed)
Installing http://rocks.moonscript.org/lua-cjson-2.1.0-1.src.rock
gcc -O2 -fPIC -I/usr/local/include/tarantool -c lua_cjson.c -o lua_cjson.o
lua_cjson.c:1298:13: error: static declaration of 'luaL_setfuncs' follows non-static declaration
static void luaL_setfuncs (lua_State *l, const luaL_Reg *reg, int nup)
^~~~~~~~~~~~~
In file included from lua_cjson.c:44:0:
/usr/local/include/tarantool/lauxlib.h:88:18: note: previous declaration of 'luaL_setfuncs' was here
LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup);
^~~~~~~~~~~~~
In file included from lua_cjson.c:47:0:
fpconv.h:15:20: warning: inline function 'fpconv_init' declared but never defined
extern inline void fpconv_init();
^~~~~~~~~~~

Error: Failed installing dependency: http://rocks.moonscript.org/lua-cjson-2.1.0-1.src.rock - Build error: Failed compiling object lua_cjson.o