Building issue: lack of -std=c++11 flag on src/CMakeLists.txt

[ItaloMunozAutentia]

Building on Ubuntu 16.04, produces a warning and an error:

Warning:

Scanning dependencies of target minizip
[ 17%] Building C object external/minizip/CMakeFiles/minizip.dir/ioapi.c.o
[ 20%] Building C object external/minizip/CMakeFiles/minizip.dir/unzip.c.o
[ 22%] Building C object external/minizip/CMakeFiles/minizip.dir/zip.c.o
/home/imunoz/Documentos/Dev/AutentiaX/Agente/third-party-libs/Update-Installer/external/minizip/zip.c: In function ‘zipOpenNewFileInZip4_64’:
/home/imunoz/Documentos/Dev/AutentiaX/Agente/third-party-libs/Update-Installer/external/minizip/zip.c:1248:28: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
         zi->ci.pcrc_32_tab = get_crc_table();
                            ^

Error:

Scanning dependencies of target updater
[ 75%] Building CXX object src/CMakeFiles/updater.dir/main.cpp.o
/home/imunoz/Documentos/Dev/AutentiaX/Agente/third-party-libs/Update-Installer/src/main.cpp: In function ‘int main(int, char**)’:
/home/imunoz/Documentos/Dev/AutentiaX/Agente/third-party-libs/Update-Installer/src/main.cpp:153:3: error: ‘unique_ptr’ is not a member of ‘std’
   std::unique_ptr<UpdateDialog> dialog(createUpdateDialog());
   ^
/home/imunoz/Documentos/Dev/AutentiaX/Agente/third-party-libs/Update-Installer/src/main.cpp:153:31: error: expected primary-expression before ‘>’ token
   std::unique_ptr<UpdateDialog> dialog(createUpdateDialog());
                               ^
/home/imunoz/Documentos/Dev/AutentiaX/Agente/third-party-libs/Update-Installer/src/main.cpp:153:60: error: ‘dialog’ was not declared in this scope
   std::unique_ptr<UpdateDialog> dialog(createUpdateDialog());
                                                            ^
src/CMakeFiles/updater.dir/build.make:62: fallo en las instrucciones para el objetivo 'src/CMakeFiles/updater.dir/main.cpp.o'
make[2]: *** [src/CMakeFiles/updater.dir/main.cpp.o] Error 1
CMakeFiles/Makefile2:255: fallo en las instrucciones para el objetivo 'src/CMakeFiles/updater.dir/all'
make[1]: *** [src/CMakeFiles/updater.dir/all] Error 2
Makefile:94: fallo en las instrucciones para el objetivo 'all'
make: *** [all] Error 2

The error triggering everything else is: "error: ‘unique_ptr’ is not a member of ‘std’" but main.cpp includes <memory>.

It can be fixed by editing src/CMakeLists.txt, line 7 from:

if (UNIX)
	add_definitions(-Wall -Werror -Wconversion)
endif()

to:

if (UNIX)
	add_definitions(-Wall -Werror -Wconversion -std=c++11)
endif()

and to fix the warning, edit external/minizip/zip.c line 1248
from:
zi->ci.pcrc_32_tab = get_crc_table();
to:
zi->ci.pcrc_32_tab = (const unsigned long*)(get_crc_table());