unicorn/qemu/crypto/Makefile.objs
Daniel P. Berrange 4c726ca49b
crypto: move crypto objects out of libqemuutil.la
Future patches will be adding more crypto related APIs which
rely on QOM infrastructure. This creates a problem, because
QOM relies on library constructors to register objects. When
you have a file in a static .a library though which is only
referenced by a constructor the linker is dumb and will drop
that file when linking to the final executable :-( The only
workaround for this is to link the .a library to the executable
using the -Wl,--whole-archive flag, but this creates its own
set of problems because QEMU is relying on lazy linking for
libqemuutil.a. Using --whole-archive majorly increases the
size of final executables as they now contain a bunch of
object code they don't actually use.

The least bad option is to thus not include the crypto objects
in libqemuutil.la, and instead define a crypto-obj-y variable
that is referenced directly by all the executables that need
this code (tools + softmmu, but not qemu-ga). We avoid pulling
entire of crypto-obj-y into the userspace emulators as that
would force them to link to gnutls too, which is not required.

Backports commit fb37726db77b21f3731b90693d2c93ade1777528 from qemu
2018-02-17 15:23:50 -05:00

6 lines
148 B
Makefile

crypto-obj-y = init.o
crypto-obj-y += hash.o
crypto-obj-y += aes.o
# Let the userspace emulators avoid linking gnutls/etc
crypto-aes-obj-y = aes.o