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Re: [Qemu-trivial] [PATCH v3] ivshmem-server: ivshmem-client: Build when

From: Michael Tokarev
Subject: Re: [Qemu-trivial] [PATCH v3] ivshmem-server: ivshmem-client: Build when eventfd() is available
Date: Mon, 5 Jun 2017 17:29:21 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

31.05.2017 15:00, Kamil Rytarowski wrote:
> Currently ivshmem requires eventfd() which is Linux specific.
> Do not and build it unconditionally on every Linux/BSD/Solaris.
> This patch indirectly fixes build failure on NetBSD, where these tools
> additionally require -lrt for shm_open(3). In future there should be
> added support for NetBSD and the linking addressed appropriately.

Unfortunately this breaks static build.

$ ../configure --disable-system --disable-linux-user --static
$ make V=1
c++ -I/usr/include/pixman-1  -Werror -pthread -I/usr/include/glib-2.0 
-I/usr/lib/x86_64-linux-gnu/glib-2.0/include -m64 -mcx16 -D_GNU_SOURCE
-Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes
-fno-strict-aliasing -fno-common -fwrapv  -Wendif-labels 
-Wno-shift-negative-value -Wno-missing-include-dirs -Wempty-body 
-Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers 
-Wold-style-declaration -Wold-style-definition -Wtype-limits 
-I/usr/include/libpng16 -I/build/qemu/git/tests -O2 -U_FORTIFY_SOURCE 
-D_FORTIFY_SOURCE=2 -g  -Wl,--warn-common -m64 -static -g  -o ivshmem-server
libqemuutil.a libqemustub.a   -lm -lgthread-2.0 -pthread -lglib-2.0 -pthread 
-lpcre -pthread  -lz -lrt -lz -lnettle  -lutil
/usr/lib/gcc/x86_64-linux-gnu/6/../../../x86_64-linux-gnu/crt1.o: In function 
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status
Makefile:475: error building «ivshmem-server»
$ _

I'll take a look at this later. reverting it for now.



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