curl 安装了 ssl 但编译 R 说 libcurl 找不到 https 支持

Question

我安装了openssl，curl-7.57.0，选项--witt-ssl在centos6.4下启用https支持，设置

export CURL_CPPFLAGS=-I/usr/local/curl-7.57.0/include
export CURL_LIBS=-L/usr/local/curl-7.57.0/lib

并编译 R：

./configure --prefix=/usr/local/R-3.4.3 --enable-R-shlib

但是命令说 libcurl 不支持 https：

...
checking for curl-config... /usr/local/curl-7.57.0/bin/curl-config
checking libcurl version ... 7.57.0
checking curl/curl.h usability... yes
checking curl/curl.h presence... yes
checking for curl/curl.h... yes
checking if libcurl is version 7 and >= 7.22.0... yes
checking if libcurl supports https... no
configure: error: libcurl >= 7.22.0 library and headers are required with support for https

但是，命令curl-config --protocols 显示支持HTTPS：

DICT
FILE
FTP
FTPS
GOPHER
HTTP
HTTPS
IMAP
...

我参考了Installing R on Linux: configure: error: libcurl >= 7.28.0 library and headers are required with support for https并尝试安装libcurl4-openssl-dev，但似乎centos6.4没有这个lib。我该如何解决我的问题？

Answer 1

最后我解决了这个问题。好像编译找不到对应的libssl.so所以失败了。以下将解决问题：

export PATH=/usr/local/bzip2-1.0.6/bin:$PATH
export PATH=/usr/local/xz-5.2.3/bin:$PATH
export PATH=/usr/local/zlib-1.2.11/bin:$PATH
export PATH=/usr/local/pcre-8.41/bin:$PATH
export PATH=/usr/local/curl-7.57.0/bin:$PATH
export PATH=/usr/local/openssl-1.1.0g/bin:$PATH  

export LD_LIBRARY_PATH=/usr/local/bzip2-1.0.6/lib:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH=/usr/local/xz-5.2.3/lib:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH=/usr/local/zlib-1.2.11/lib:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH=/usr/local/pcre-8.41/lib:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH=/usr/local/curl-7.57.0/lib:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH=/usr/local/openssl-1.1.0g/lib:$LD_LIBRARY_PATH    

export CFLAGS="-I/usr/local/bzip2-1.0.6/include -I/usr/local/xz-5.2.3/include -I/usr/local/zlib-1.2.11/include -I/usr/local/pcre-8.41/include -I/usr/local/curl-7.57.0/include -I/usr/local/openssl-1.1.0g/include"
export LDFLAGS="-L/usr/local/bzip2-1.0.6/lib -L/usr/local/xz-5.2.3/lib -L/usr/local/zlib-1.2.11/lib -L/usr/local/pcre-8.41/lib -L/usr/local/curl-7.57.0/lib -L/usr/local/openssl-1.1.0g/lib"