[CMake] Overriding the include path, library path of OpenSSL, Zlib and libcurl

[Alex Chen]

Although cmake uses the path I supplied for OpenSSL and Zlib, I do not see the –I flag being used in compiling the code. (I set VERBOSE=1 to make to see what it does.)

When I run ‘ldd’ against the resulting .so files, reference to libssl.so or libcrypto.so is empty, i.e ‘libssl.so => not found’, but libz.so still links to /lib64/libz.so. (It seems to ignore the fact it does find a new path of zlib.)

 

How to I set the linker flag, i.e. –L and –Wl,-rpath=$myLibPath ?

 

Alex Chen

 

From: CMake <cmake-bounces at cmake.org> on behalf of Alex Chen <alex_chen at filemaker.com>
Date: Friday, April 21, 2017 at 10:28 AM
To: CMake <cmake at cmake.org>
Subject: Re: [CMake] Overriding the include path, library path of OpenSSL, Zlib and libcurl

 

Thanks for the help.  I will try that. 

 

Alex Chen

 

From: Michael Ellery <mellery451 at gmail.com>
Date: Thursday, April 20, 2017 at 8:13 PM
To: Alex Chen <alex_chen at filemaker.com>
Cc: CMake <cmake at cmake.org>
Subject: Re: [CMake] Overriding the include path, library path of OpenSSL, Zlib and libcurl

 

It doesn’t look like that find module directly supports HINTS or PATHS, so you can try setting CMAKE_LIBRARY_PATH and CMAKE_INCLUDE_PATH  (https://cmake.org/cmake/help/v3.7/variable/CMAKE_LIBRARY_PATH.html) before calling the curl finder. I think you can add to those variables whatever paths are appropriate to search for CURL on your systems.

 

-Mike

 

On Apr 20, 2017, at 6:06 PM, Alex Chen <alex_chen at filemaker.com> wrote:

The source code I want to compile on Linux uses ‘FindOpenSSL’, ‘FindZLIB’, and ‘FindCURL’ to resolve the paths of these libraries.

However, I have newer version of these libraries in different locations.  How to I override these to use my paths?

I am able to use OPENSSL_ROOT_DIR, from FindOpenSSL module, and ZLIB_ROOT, from FindZLIB module, to override the paths.  

But I cannot find anything in FindCURL module to override the path of libcurl.

  

  

Alex Chen

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