https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82346
--- Comment #5 from krzysio.kurek at wp dot pl ---
$ g++-5 -std=c++11 main.cpp -o string -v
Using built-in specs.
COLLECT_GCC=g++-5
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.4.1-12ubuntu4'
--with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --disable-browser-plugin --enable-java-awt=gtk
--enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre
--enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.1 20170906 (Ubuntu 5.4.1-12ubuntu4)
COLLECT_GCC_OPTIONS='-std=c++11' '-o' 'string' '-v' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -quiet -v -imultiarch x86_64-linux-gnu
-D_GNU_SOURCE main.cpp -quiet -dumpbase main.cpp -mtune=generic -march=x86-64
-auxbase main -std=c++11 -version -fstack-protector-strong -Wformat
-Wformat-security -o /tmp/ccUSBFkt.s
GNU C++11 (Ubuntu 5.4.1-12ubuntu4) version 5.4.1 20170906 (x86_64-linux-gnu)
compiled by GNU C version 5.4.1 20170906, GMP version 6.1.2, MPFR
version 3.1.6-rc1, MPC version 1.0.3
warning: MPFR header version 3.1.6-rc1 differs from library version 3.1.6.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/5"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/5/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/5
/usr/include/x86_64-linux-gnu/c++/5
/usr/include/c++/5/backward
/usr/lib/gcc/x86_64-linux-gnu/5/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C++11 (Ubuntu 5.4.1-12ubuntu4) version 5.4.1 20170906 (x86_64-linux-gnu)
compiled by GNU C version 5.4.1 20170906, GMP version 6.1.2, MPFR
version 3.1.6-rc1, MPC version 1.0.3
warning: MPFR header version 3.1.6-rc1 differs from library version 3.1.6.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 4fa6e505be5bb1fff9039a541d8268ee
main.cpp: In function ‘int main()’:
main.cpp:6:25: error: ‘to_string’ is not a member of ‘std’
std::string perfect = std::to_string(1+2+4+7+14) + " is a perfect number";
^
