Errors in makefile for qemu 0.14.1 in ubuntu 15.04 64 bit

Question

I am trying to install qemu-0.14.1 in ubuntu 15.04 64 bit system. On giving the make command it gives following errors:

../slirp/misc.o: In function memset': /usr/include/x86_64-linux-gnu/bits/string3.h:86: warning: memset used with constant zero length parameter; this could be due to transposed parameters ../qemu-timer.o: In functiondynticks_start_timer': /home/shruti/Downloads/qemu-0.14.1/qemu-timer.c:862: undefined reference to timer_create' ../qemu-timer.o: In functiondynticks_rearm_timer': /home/shruti/Downloads/qemu-0.14.1/qemu-timer.c:901: undefined reference to timer_gettime' /home/shruti/Downloads/qemu-0.14.1/qemu-timer.c:914: undefined reference totimer_settime' ../qemu-timer.o: In function dynticks_stop_timer': /home/shruti/Downloads/qemu-0.14.1/qemu-timer.c:880: undefined reference totimer_delete' collect2: error: ld returned 1 exit status Makefile:347: recipe for target 'qemu-system-arm' failed make[1]: * [qemu-system-arm] Error 1 Makefile:84: recipe for target 'subdir-arm-softmmu' failed make: * [subdir-arm-softmmu] Error 2

Can anyone please guide with correct steps and why this error is coming related to timer object file.

Answer 1

Issue is solved by editing two files, Makefile and Makefile.target by adding

LIBS+=-lz -lrt -lm

Answer 2

Check if you have correct GCC/G++ versions installed. My suggestion is to use default gcc 7 for your application.

Installing GCC the C compiler on Ubuntu, step by step instructions

Install multiple C and C++ compiler versions:

$ sudo apt install build-essential
$ sudo apt -y install gcc-7 g++-7 gcc-8 g++-8 gcc-9 g++-9

Use the update-alternatives tool to create list of multiple GCC and G++ compiler alternatives:

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 7
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-7 7
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 8
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 8
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 9
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-9 9

Check the available C and C++ compilers list on your Ubuntu system and select desired version by entering relevant selection number:

$ sudo update-alternatives --config gcc

There are 3 choices for the alternative gcc (providing /usr/bin/gcc).

  Selection    Path            Priority   Status
------------------------------------------------------------
  0            /usr/bin/gcc-9   9         auto mode
  1            /usr/bin/gcc-7   7         manual mode
* 2            /usr/bin/gcc-8   8         manual mode
  3            /usr/bin/gcc-9   9         manual mode

Press to keep the current choice[*], or type selection number: For C++ compiler execute:

$ sudo update-alternatives --config g++

There are 3 choices for the alternative g++ (providing /usr/bin/g++).

  Selection    Path            Priority   Status
------------------------------------------------------------
* 0            /usr/bin/g++-9   9         auto mode
  1            /usr/bin/g++-7   7         manual mode
  2            /usr/bin/g++-8   8         manual mode
  3            /usr/bin/g++-9   9         manual mode

Press to keep the current choice[*], or type selection number: Each time after switch check your currently selected compiler version:

$ gcc --version
$ g++ --version