Mac Intel平台用kerl安装Erlang R25.3编译失败求助

问题 #

使用kerl安装Erlang R25.3时编译失败，环境信息：

• macOS版本：13.4（22F66），Intel芯片
• clang版本：Apple clang 14.0.3（clang-1403.0.22.14.1）

编译时出现以下错误：

CC ../priv/obj/x86_64-apple-darwin22.5.0/cmac.o
CC ../priv/obj/x86_64-apple-darwin22.5.0/common.o
CC ../priv/obj/x86_64-apple-darwin22.5.0/dh.o
dh.c:93:63: warning: incompatible pointer types passing 'unsigned long *' to parameter of type 'uint64_t *' (aka 'unsigned long long *') [-Wincompatible-pointer-types]
        params[i++] = OSSL_PARAM_construct_uint64("priv_len", &len);
                                                              ^~~~
/usr/local/openssl/include/openssl/params.h:77:67: note: passing argument to parameter 'buf' here
OSSL_PARAM OSSL_PARAM_construct_uint64(const char *key, uint64_t *buf);
                                                                  ^
dh.c:98:12: error: call to undeclared function 'EVP_PKEY_CTX_new_from_name'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    pctx = EVP_PKEY_CTX_new_from_name(NULL, "DH", NULL);
           ^
dh.c:98:12: note: did you mean 'EVP_PKEY_CTX_new_provided'?
/usr/local/openssl/include/openssl/evp.h:1469:15: note: 'EVP_PKEY_CTX_new_provided' declared here
EVP_PKEY_CTX *EVP_PKEY_CTX_new_provided(OPENSSL_CTX *libctx,
              ^
dh.c:98:10: warning: incompatible integer to pointer conversion assigning to 'EVP_PKEY_CTX *' (aka 'struct evp_pkey_ctx_st *') from 'int' [-Wint-conversion]
    pctx = EVP_PKEY_CTX_new_from_name(NULL, "DH", NULL);
         ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dh.c:100:9: error: call to undeclared function 'EVP_PKEY_fromdata_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    if (EVP_PKEY_fromdata_init(pctx) <= 0) {
        ^
dh.c:100:9: note: did you mean 'EVP_PKEY_key_fromdata_init'?
/usr/local/openssl/include/openssl/evp.h:1562:5: note: 'EVP_PKEY_key_fromdata_init' declared here
int EVP_PKEY_key_fromdata_init(EVP_PKEY_CTX *ctx);
    ^
dh.c:104:40: error: use of undeclared identifier 'EVP_PKEY_KEYPAIR'
    if (EVP_PKEY_fromdata(pctx, &pkey, EVP_PKEY_KEYPAIR, params) <= 0) {
                                       ^
dh.c:111:16: error: call to undeclared function 'EVP_PKEY_CTX_new_from_pkey'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    pctx_gen = EVP_PKEY_CTX_new_from_pkey(NULL, pkey, NULL);
               ^
dh.c:111:14: warning: incompatible integer to pointer conversion assigning to 'EVP_PKEY_CTX *' (aka 'struct evp_pkey_ctx_st *') from 'int' [-Wint-conversion]
    pctx_gen = EVP_PKEY_CTX_new_from_pkey(NULL, pkey, NULL);
             ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dh.c:123:10: error: call to undeclared function 'EVP_PKEY_generate'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    if (!EVP_PKEY_generate(pctx_gen, &pkey_gen)) {
         ^
dh.c:130:10: error: call to undeclared function 'EVP_PKEY_get_bn_param'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    if (!EVP_PKEY_get_bn_param(pkey_gen, "pub",  &pub_key_gen)) {
         ^
dh.c:206:17: error: call to undeclared function 'EVP_PKEY_CTX_new_from_name'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    peer_pctx = EVP_PKEY_CTX_new_from_name(NULL, "DH", NULL);
                ^
dh.c:206:15: warning: incompatible integer to pointer conversion assigning to 'EVP_PKEY_CTX *' (aka 'struct evp_pkey_ctx_st *') from 'int' [-Wint-conversion]
    peer_pctx = EVP_PKEY_CTX_new_from_name(NULL, "DH", NULL);
              ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dh.c:208:9: error: call to undeclared function 'EVP_PKEY_fromdata_init'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    if (EVP_PKEY_fromdata_init(peer_pctx) <= 0)
        ^
dh.c:210:50: error: use of undeclared identifier 'EVP_PKEY_KEYPAIR'
    if (EVP_PKEY_fromdata(peer_pctx, &peer_pkey, EVP_PKEY_KEYPAIR, params) <= 0)
                                                 ^
dh.c:217:14: warning: incompatible integer to pointer conversion assigning to 'EVP_PKEY_CTX *' (aka 'struct evp_pkey_ctx_st *') from 'int' [-Wint-conversion]
    own_pctx = EVP_PKEY_CTX_new_from_name(NULL, "DH", NULL);
             ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dh.c:222:48: error: use of undeclared identifier 'EVP_PKEY_KEYPAIR'
    if (EVP_PKEY_fromdata(own_pctx, &own_pkey, EVP_PKEY_KEYPAIR, params) <= 0)
                                               ^
5 warnings and 10 errors generated.

疑问：这是否是clang版本与Erlang R25.3冲突导致的？该如何解决此问题？

解答 #

不是clang版本的问题，核心原因是Erlang R25.3依赖OpenSSL 1.1.x版本，但当前使用的是OpenSSL 3.x版本。错误里的EVP_PKEY_CTX_new_from_name等函数是OpenSSL 3.x新增的API，而Erlang R25.3的代码是针对OpenSSL 1.1.x编写的，因此会出现函数未声明的错误。

解决步骤：

1. 安装OpenSSL 1.1.x版本
   • 用Homebrew安装：brew install openssl@1.1
2. 在kerl编译时指定OpenSSL 1.1.x的路径
   • 先获取OpenSSL 1.1的安装路径：brew --prefix openssl@1.1，会输出类似/usr/local/opt/openssl@1.1的路径
   • 使用kerl编译时设置环境变量：

     KERL_CONFIGURE_OPTIONS="--with-ssl=$(brew --prefix openssl@1.1)" kerl build R25.3 R25.3
     

3. 编译完成后，安装该版本：kerl install R25.3 ~/erlang/r25.3
4. 激活环境：. ~/erlang/r25.3/activate

如果之前已经用kerl下载过源码，先清理旧的编译缓存：kerl clean R25.3，再重新执行编译步骤。

内容的提问来源于stack exchange，提问作者俞钦峰