I'm trying to install the lastes qpdf (https://github.com/qpdf/qpdf/releases/tag/v11.5.0) , with my locally compiled openssl at non-standard location.
How to specify the path to my locally installed openssl?
I looked at its libqpdf/CMakeLists.txt and came up with:
cmake -DREQUIRE_CRYPTO_OPENSSL=1 -DOPENSSL_H_PATH=/opt/openssl3/include -DOPENSSL_LIB_PATH=/opt/openssl3/lib64 -S . -B build
cmake --build build -- -k
but then it fails with many lines like
../libqpdf/libqpdf.so.29.5.0: undefined reference to `EVP_CIPHER_CTX_set_key_length'
So looks like it did not use my compiled openssl at all.
So how to specify the path to my locally installed openssl in this qpdf?
Turned out this is a general cmake issue. This is because cmake uses pkg-config to check additional library locations, regardless of variables we feed into it with -D.
So even though the cmake line in OP is correct by itself, it will never work by itself. Only solution is to specify $PKG_CONFIG_PATH before running cmake:
export PKG_CONFIG_PATH=/opt/openssl3/lib/pkgconfig:$PKG_CONFIG_PATH
And that path used above /opt/openssl3/lib/pkgconfig is determined by the fact that that folder contains the .pc file such as openssl.pc.
Also, ccmake helps finding out all the available variables for cmake.