I use gcc 4.8.1 from http://hpc.sourceforge.net on Mac OSX Mountain Lion. I am trying to compile a C++ program which uses the to_string function in <string>. I need to use the flag -std=c++11 every time:
g++ -std=c++11 -o testcode1 code1.cpp Is there a way to include this flag by default?
H2CO3 is right, you can use a makefile with the CXXFLAGS set with -std=c++11 A makefile is a simple text file with instructions about how to compile your program. Create a new file named Makefile (with a capital M). To automatically compile your code just type the make command in a terminal. You may have to install make.
Here's a simple one :
CXX=clang++ CXXFLAGS=-g -std=c++11 -Wall -pedantic BIN=prog SRC=$(wildcard *.cpp) OBJ=$(SRC:%.cpp=%.o) all: $(OBJ) $(CXX) -o $(BIN) $^ %.o: %.c $(CXX) $@ -c $< clean: rm -f *.o rm $(BIN) It assumes that all the .cpp files are in the same directory as the makefile. But you can easily tweak your makefile to support a src, include and build directories.
Edit : I modified the default c++ compiler, my version of g++ isn't up-to-date. With clang++ this makefile works fine.
$^ does? And what $< does?As previously mentioned - in case of a project, Makefile or otherwise, this is a project configuration issue, where you'll likely need to specify other flags too.
But what about one-off programs, where you would normally just write g++ file.cpp && ./a.out?
Well, I would much like to have some #pragma to turn in on at source level, or maybe a default extension - say .cxx or .C11 or whatever, trigger it by default. But as of today, there is no such feature.
But, as you probably are working in a manual environment (i.e. shell), you can just have an alias in you .bashrc (or whatever):
alias g++11="g++ -std=c++0x" or, for newer G++ (and when you want to feel "real C++11")
alias g++11="g++ -std=c++11" You can even alias to g++ itself, if you hate C++03 that much ;)
I think you could do it using a specs file.
Under MinGW you could run
gcc -dumpspecs > specs
Where it says
*cpp: %{posix:-D_POSIX_SOURCE} %{mthreads:-D_MT} You change it to
*cpp: %{posix:-D_POSIX_SOURCE} %{mthreads:-D_MT} -std=c++11 And then place it in
/mingw/lib/gcc/mingw32/<version>/specs
I'm sure you could do the same without a MinGW build. Not sure where to place the specs file though.
The folder is probably either /gcc/lib/ or /gcc/.
strace -f gcc your-sources-here 2>&1 | grep specs. On one (older) Debian system, this yields /usr/lib/gcc/i586-linux-gnu/4.9/specs. Created that specs as described in the answer (needs sudo to move it there under Linux) and works like a charm! Thanks.If you are using sublime then this code may work if you add it in build as code for building system. You can use this link for more information.
{ "shell_cmd": "g++ \"${file}\" -std=c++1y -o \"${file_path}/${file_base_name}\"", "file_regex": "^(..[^:]*):([0-9]+):?([0-9]+)?:? (.*)$", "working_dir": "${file_path}", "selector": "source.c, source.c++", "variants": [ { "name": "Run", "shell_cmd": "g++ \"${file}\" -std=c++1y -o \"${file_path}/${file_base_name}\" && \"${file_path}/${file_base_name}\"" } ] } 
CXXFLAGS.