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

From: Kamil Rytarowski
Subject: Re: [Qemu-trivial] [PATCH v3] ivshmem-server: ivshmem-client: Build when eventfd() is available
Date: Mon, 5 Jun 2017 16:52:16 +0200
User-agent: Mozilla/5.0 (X11; NetBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1

On 05.06.2017 16:29, Michael Tokarev wrote:
> 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
> -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes 
> -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 
> -Wnested-externs
> -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers 
> -Wold-style-declaration -Wold-style-definition -Wtype-limits 
> -fstack-protector-strong
> -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 
> `_start':
> (.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.
> Thanks,
> /mjt

I will try to reproduce it locally.

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