Curl 使用CMake链接静态卷曲时出错

我正在尝试构建使用cURL库的示例程序。不幸的是，我在链接过程中有很多错误

系统：Linux-x86_64，GCC版本7.2.2

1） 由于需要SSL支持，我首先构建了OpenSSL库。我下载了openssl-1.1.1-pre5.tar.gz，解包并将其配置为静态构建：

$ ./Configure --prefix="${HOME}/Source/openssl-1.1.1-pre5" no-shared linux-x86_64

然后

2） 接下来，我准备了ZLib库：下载ZLib-1.2.11.tar.gz，解包并将其配置为静态构建：

$ ./configure --prefix="${HOME}/Source/zlib-1.2.11" --static

然后

3） 然后我构建了cURL，也作为静态库：

$ ./configure --prefix="${HOME}/Source/curl-7.59.0" --with-ssl="${HOME}/Source/openssl-1.1.1-pre5" --with-zlib="${HOME}/Source/zlib-1.2.11" --enable-static --disable-shared

。。。 配置概要：

  curl version:     7.59.0
  Host setup:       x86_64-pc-linux-gnu
  Install prefix:   /home/sergei/Source/curl-7.59.0
  Compiler:         gcc
  SSL support:      enabled (OpenSSL)
  SSH support:      no      (--with-libssh2)
  zlib support:     enabled
  brotli support:   no      (--with-brotli)
  GSS-API support:  no      (--with-gssapi)
  TLS-SRP support:  enabled
  resolver:         POSIX threaded
  IPv6 support:     enabled
  Unix sockets support: enabled
  IDN support:      no      (--with-{libidn2,winidn})
  Build libcurl:    Shared=no, Static=yes
  Built-in manual:  enabled
  --libcurl option: enabled (--disable-libcurl-option)
  Verbose errors:   enabled (--disable-verbose)
  SSPI support:     no      (--enable-sspi)
  ca cert bundle:   /etc/ssl/certs/ca-certificates.crt
  ca cert path:     no
  ca fallback:      no
  LDAP support:     no      (--enable-ldap / --with-ldap-lib / --with-lber-lib)
  LDAPS support:    no      (--enable-ldaps)
  RTSP support:     enabled
  RTMP support:     no      (--with-librtmp)
  metalink support: no      (--with-libmetalink)
  PSL support:      no      (libpsl not found)
  HTTP2 support:    disabled (--with-nghttp2)
  Protocols:        DICT FILE FTP FTPS GOPHER HTTP HTTPS IMAP IMAPS POP3 POP3S RTSP SMB SMBS SMTP SMTPS TELNET TFTP

然后

构建完成后，我在${HOME}/Source/cURL-7.59.0中得到了cURL-dir结构：

/bin
/include
/lib    <-- here are libcurl.a and libcurl.la 
/share

当我尝试构建时，我遇到了很多错误（在“[100%]链接CXX可执行文件main”行之后），如下所示：

/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-version.o): In function `curl_version.part.0':
version.c:(.text+0x68): undefined reference to `zlibVersion'
/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-version.o): In function `curl_version_info.part.1':
version.c:(.text+0xde): undefined reference to `zlibVersion'
/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-content_encoding.o): In function `gzip_init_writer':
content_encoding.c:(.text+0x230): undefined reference to `zlibVersion'
content_encoding.c:(.text+0x266): undefined reference to `inflateInit2_'
content_encoding.c:(.text+0x289): undefined reference to `inflateInit2_'
/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-content_encoding.o): In function `exit_zlib':
content_encoding.c:(.text+0x31c): undefined reference to `inflateEnd'
/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-content_encoding.o): In function `inflate_stream':
content_encoding.c:(.text+0x435): undefined reference to `inflate'
content_encoding.c:(.text+0x4eb): undefined reference to `inflateEnd'
content_encoding.c:(.text+0x504): undefined reference to `inflateInit2_'

openssl.c:(.text+0x4ae): undefined reference to `SSL_get_error'
openssl.c:(.text+0x4c3): undefined reference to `ERR_get_error'
openssl.c:(.text+0x553): undefined reference to `ERR_error_string_n'
/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-openssl.o): In function `ssl_ui_writer':
openssl.c:(.text+0x8e0): undefined reference to `UI_get_string_type'
openssl.c:(.text+0x8f0): undefined reference to `UI_get0_user_data'
openssl.c:(.text+0x8fd): undefined reference to `UI_get_input_flags'
openssl.c:(.text+0x906): undefined reference to `UI_OpenSSL'
openssl.c:(.text+0x90e): undefined reference to `UI_method_get_writer'

就像这样：

/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-version.o): In function `curl_version.part.0':
version.c:(.text+0x68): undefined reference to `zlibVersion'
/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-version.o): In function `curl_version_info.part.1':
version.c:(.text+0xde): undefined reference to `zlibVersion'
/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-content_encoding.o): In function `gzip_init_writer':
content_encoding.c:(.text+0x230): undefined reference to `zlibVersion'
content_encoding.c:(.text+0x266): undefined reference to `inflateInit2_'
content_encoding.c:(.text+0x289): undefined reference to `inflateInit2_'
/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-content_encoding.o): In function `exit_zlib':
content_encoding.c:(.text+0x31c): undefined reference to `inflateEnd'
/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-content_encoding.o): In function `inflate_stream':
content_encoding.c:(.text+0x435): undefined reference to `inflate'
content_encoding.c:(.text+0x4eb): undefined reference to `inflateEnd'
content_encoding.c:(.text+0x504): undefined reference to `inflateInit2_'

openssl.c:(.text+0x4ae): undefined reference to `SSL_get_error'
openssl.c:(.text+0x4c3): undefined reference to `ERR_get_error'
openssl.c:(.text+0x553): undefined reference to `ERR_error_string_n'
/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-openssl.o): In function `ssl_ui_writer':
openssl.c:(.text+0x8e0): undefined reference to `UI_get_string_type'
openssl.c:(.text+0x8f0): undefined reference to `UI_get0_user_data'
openssl.c:(.text+0x8fd): undefined reference to `UI_get_input_flags'
openssl.c:(.text+0x906): undefined reference to `UI_OpenSSL'
openssl.c:(.text+0x90e): undefined reference to `UI_method_get_writer'

你能帮帮我吗：我做错了什么

注意：在CMakeLists.txt中添加行“add_definitions（-DCURL_STATICLIB）”无效

---

谢谢。

在CMakelists.txt中添加一行：

link_libraries(z)

---

ref:

您是否尝试使用、设置

-DCMAKE\u PREFIX\u PATH

或

-DCURL\u DIR

适当？最小的CMakeLists.txt是这样的：与共享库不同，静态库不包含工作所需的库列表。因此，您需要手动链接CURL使用的每个库。我只能使用find_package（）来查找OpenSSL静态库（我以前构建过），并且该函数运行良好：找到libssl.a、libcrypto.a和“include”dir。对于ZLib和cURL，find_package（）只从“/usr/…”linux目录中查找共享库。我还尝试使用与cURL相同的方法链接OpenSSL和ZLib：添加_library（），设置_target_属性（），包括_目录（），然后将它们全部添加到目标_link_库（主ZLib_库OpenSSL_library cURL_库）。不幸的是，它不允许我构建示例程序。你有没有其他想法，如何编写正确的CMakeLists.txt？？

openssl.c:(.text+0x4ae): undefined reference to `SSL_get_error'
openssl.c:(.text+0x4c3): undefined reference to `ERR_get_error'
openssl.c:(.text+0x553): undefined reference to `ERR_error_string_n'
/home/sergei/Source/curl-7.59.0/lib/libcurl.a(libcurl_la-openssl.o): In function `ssl_ui_writer':
openssl.c:(.text+0x8e0): undefined reference to `UI_get_string_type'
openssl.c:(.text+0x8f0): undefined reference to `UI_get0_user_data'
openssl.c:(.text+0x8fd): undefined reference to `UI_get_input_flags'
openssl.c:(.text+0x906): undefined reference to `UI_OpenSSL'
openssl.c:(.text+0x90e): undefined reference to `UI_method_get_writer'

link_libraries(z)