Install to non-default location not working, CMAKE_INSTALL_PREFIX is not defined about libssh2 HOT 2 CLOSED

On 3 Nov 2015 4:14 am, "hwaterfall" [email protected] wrote:

libssh2-1.6.0
Windows 10

I'm able to successfully build libssh2 on Windows but I cannot install
it. docs\INSTALL_MAKE indicates:

If you are not using CMake for your own project, install libssh2

cmake
cmake --build .
cmake --build . --target install
or
cmake --build . --target INSTALL

and then specify the install location to your project in the normal
way for your build environment. If you don't like the default install
location, add -DCMAKE_INSTALL_PREFIX= when initially
configuring the project.
<\snip>

however, when I run:
cmake -DCMAKE_INSTALL_PREFIX= -DZLIB_LIBRARY= -DZLIB_INCLUDE_DIR=
-DENABLE_ZLIB_COMPRESSION=ON -DCRYPTO_BACKEND=OpenSSL -DOPENSSL_ROOT_DIR=

These two work:
cmake --build .
cmake --build . --target RUN_TESTS

However remains empty after running this:
cmake --build . --target INSTALL

I'm not sure I understand the problem. What were you expecting to see after
cmake --build . --target INSTALL, and how does that differ from what you
see?

I've searched all the files in both libssh2-1.6.0.tar.gz from libssh2.org
and libssh2-libssh2-1.6.0.zip from github, but CMAKE_INSTALL_PREFIX seems
to only appear in docs\INSTALL_MAKE.

CMAKE_INSTALL_PREFIX is built-in CMake functionality. You can read more
about it in their docs:
https://cmake.org/cmake/help/v3.0/variable/CMAKE_INSTALL_PREFIX.html

from libssh2.

I'm not sure I understand the problem. What were you expecting to see after
cmake --build . --target INSTALL, and how does that differ from what you
see?

According to the comments I pasted from docs\INSTALL_MAKE, adding DCMAKE_INSTALL_PREFIX="chosen\prefix" will cause libssh2 to be installed into chosen\prefix when cmake --build . --target INSTALL is run, but that's not what I observed.

I ran:
cmake -DCMAKE_INSTALL_PREFIX="myssh2\install\location" -DZLIB_LIBRARY="my\zlib\lib\location" -DZLIB_INCLUDE_DIR="my\zlib\include\location" -DENABLE_ZLIB_COMPRESSION=ON -DCRYPTO_BACKEND=OpenSSL -DOPENSSL_ROOT_DIR="my\openssl\root"

After building and testing I ran:
cmake --build . --target INSTALL

I expect to have libssh2 installed into my\zlib\lib\location however, I found that it was empty. When I couldn't find CMAKE_INSTALL_PREFIX defined anywhere, I figured that was the problem.

I tried it again tonight though while writing this posted and it worked as expected blush. Sorry for the false alarm.

Thanks for the pointer to the cmake documentation!

from libssh2.