According to the C++ Standard (p. #6 of section 7 Declarations) 6 Each init-declarator in the init-declarator-list contains exactly one declarator-id, which is the name declared by that init-declarator and hence one of the names declared by the declaration So it is simply a compiler bug. The valid code could look as for example (apart … Read more
DSO here means Dynamic Shared Object; since the error message says it’s missing from the command line, I guess you have to add it to the command line. That is, try adding -lpthread to your command line.
The C++ standard says: It is possible to transfer into a block, but not in a way that bypasses declarations with initialization. A program that jumps from a point where a local variable with automatic storage duration is not in scope to a point where it is in scope is ill-formed unless the variable has … Read more
In C++, you need to cast the return of malloc() char *foo = (char*)malloc(1);
This linker error usually (in my experience) means that you’ve overridden a virtual function in a child class with a declaration, but haven’t given a definition for the method. For example: class Base { virtual void f() = 0; } class Derived : public Base { void f(); } But you haven’t given the definition … Read more
g++ -Wl,-Bstatic -lz -lfoo -Wl,-Bdynamic -lbar -Wl,–as-needed Will link zlib and libfoo as static, and libbar as dynamic . –as-needed will drop any unused dynamic library.
From Jonathan Wakely a better option (works on clang too): g++ -E -x c++ – -v < /dev/null clang++ -E -x c++ – -v < /dev/null I noticed there’s a flag in cpp for specifying language. This works like a charm. cpp -xc++ -v < /dev/null #include “…” search starts here: #include <…> search starts … Read more
What has been most useful for me: Build on a RAM filesystem. This is trivial on Linux. You may want to keep a copy of common header files (precompiled or the actual .h files) on the RAM filesystem as well. Precompiled headers. I have one per (major) library (e.g. Boost, Qt, stdlib). Declare instead of … Read more
As others have pointed out you should use clang++ rather than g++. Also, you should use the libc++ library instead of the default libstdc++; The included version of libstdc++ is quite old and therefore does not include C++11 library features. clang++ -std=c++11 -stdlib=libc++ -Weverything main.cpp If you haven’t installed the command line tools for Xcode … Read more
This is the chopped down makefile for one of my projects, which compiles the sources in ‘src’ and places the .o files in the directory “obj”. The key bit is the the use of the patsubst() function – see the GNU make manual (which is actually a pretty good read) for details: OUT = lib/alib.a … Read more