Rebuild the .pc file when config-host.mak changes since @prefix@,
@libdir@, etc could have changed.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

libdir is hardcoded to ${prefix}/lib in Makefile.  Fedora x86_64 uses
/usr/lib64 and this means libaries will be installed in the wrong place.

This patch moves prefix, includedir, libdir, and mandir into ./configure
for easier customization.  To build and install on Fedora x86_64:

  # ./configure --libdir=/usr/lib64
  # make && make install

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

pkg-config (https://pkgconfig.freedesktop.org/) makes it easier to build
applications that have library dependencies.  Libraries ship .pc files
containing the compiler and linker flags needed to build successfully.
This saves applications from hardcoding these details into their build
scripts, especially when these details can change between operating
systems or distributions.

To build a liburing application:

  gcc $(pkg-config --cflags --libs liburing) -o myapp myapp.c

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Signed-off-by: Weiping Zhang <zhangweiping@didiglobal.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

'make install' did not install all the headers necessary to use the
library; fix.

Additionally allow specifying the install prefix, which was previously
hardcoded to /usr.

Signed-off-by: Kevin Vigor <kvigor@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Install man pages on running 'make install', so that
we can run commands like 'man 2 io_uring_setup'.

Signed-off-by: Shenghui Wang <shhuiw@foxmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Also adds a runtests makefile target.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

Some older installs don't have __kernel_rwf_t in linux/fs.h, so
add a check for that.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

Signed-off-by: Jens Axboe <axboe@kernel.dk>