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Re: [Qemu-devel] [PATCH v6 0/8] Shared Library Module Support

From: Peter Maydell
Subject: Re: [Qemu-devel] [PATCH v6 0/8] Shared Library Module Support
Date: Wed, 11 Sep 2013 17:26:20 +0100

On 11 September 2013 14:34, Fam Zheng <address@hidden> wrote:
> This series implements feature of shared object building as described in:
> http://wiki.qemu.org/Features/Modules

> v6: Dropping RFC.

...which I guess makes it a reasonable time to mention that
this doesn't build on MacOSX/clang:

cc -m64 -DOS_OBJECT_USE_OBJC=0 -arch x86_64 -D_GNU_SOURCE
-Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes
-fno-strict-aliasing  -Wno-initializer-overrides -Wendif-labels
-Wmissing-include-dirs -Wempty-body -Wnested-externs -Wformat-security
-Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-definition
-Wtype-limits -fstack-protector-all -I/sw/include
-I/sw/include/libpng15   -I/opt/X11/include/pixman-1
-I/Users/pm215/src/qemu/dtc/libfdt -I/Users/pm215/src/qemu/tests -I
qga/qapi-generated -I/sw/include/glib-2.0 -I/sw/lib/glib-2.0/include
-I/sw/include/glib-2.0 -I/sw/lib/glib-2.0/include -g  -m64 -framework
CoreFoundation -framework IOKit -arch x86_64 -g  -o qemu-ga
-L/sw/lib -lgmodule-2.0 -lglib-2.0 -lintl -L/sw/lib -lgthread-2.0
-lglib-2.0 -lintl
Undefined symbols for architecture x86_64:
  "_main", referenced from:
     -u command line option
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

...which looks like we're trying to link qemu-ga but not specifying
any object files at all, with the result that the linker complains that
we haven't provided a main() function.

-- PMM

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