The following instructions only apply to the release tarballs.
Install the OpenSSL development package. On Debian/Ubuntu use:
sudo apt-get install libssl-dev
Build and install libp11:
./configure && make && sudo make install
Download and install OpenSSL, for example the Windows builds available here:
To build libp11, start a Visual Studio Command Prompt and use:
nmake -f Makefile.mak
In case your OpenSSL is installed in a different directory, use:
nmake -f Makefile.mak OPENSSL_DIR=\your\openssl\directory
For x64 bit builds, make sure you opened the Native x64 VS Command Prompt and run:
nmake /f Makefile.mak OPENSSL_DIR=c:\OpenSSL-Win64 BUILD_FOR=WIN64
If any of your builds fail for any reason, ensure you clean the src directory of obj files before re-making.
To build libp11, download and install msys2-i686-*.exe from https://msys2.github.io
then start a MSYS2 MSYS console from the Start menu and use:
pacman -S git pkg-config libtool autoconf automake make gcc openssl-devel
git clone https://github.com/OpenSC/libp11.git
cd libp11
autoreconf -fi
./configure --prefix=/usr/local
make && make install
As above, assuming that you have mentioned packages already installed.
To build libp11, download and install mingw-get-setup.exe from https://sourceforge.net/projects/mingw/
I'm assuming that you have selected all necessary MinGW and MSYS packages during install
(useful hint - after clicking at checkbox press key I).
You also need to install pkg-config or pkg-config-lite and update autoconf and openssl.
http://www.gaia-gis.it/spatialite-3.0.0-BETA/mingw_how_to.html#pkg-config
https://sourceforge.net/p/mingw/mailman/message/31908633/
https://sourceforge.net/projects/pkgconfiglite/files/
http://ftp.gnu.org/gnu/autoconf/autoconf-latest.tar.gz
https://www.openssl.org/source/
You need to configure OpenSSL to replace very old mingw's version like this:
./configure --prefix=/mingw threads shared mingw
make depend && make && make install
Then download and unpack libp11, in its directory use:
libtoolize --force
aclocal -I m4 --install
autoheader
automake --force-missing --add-missing
autoconf
./configure --prefix=/usr/local
make && make install
We assume that OpenSSL is installed in /opt/openssl-mingw64. Update the paths to match your environment.
export PKG_CONFIG_PATH=/opt/openssl-mingw64/lib/pkgconfig
./configure --host=x86_64-w64-mingw32 --prefix=/opt/libp11-mingw64
make && sudo make install