problem about gcc4.7-Collection of common programming errors
Evan Rolfe
c++ openni gcc4.7
I’m trying to compile an run a very basic program given below (test.cpp) which calls the OpenNI class. You can see the files and dirs they’re in here. Sorry that some characters screws up a little bit in the browser’s encoding. I’m using the linux command: tree, if you know a better command tell me and I will update it.File StructureI’m following the guide here, see “GCC / GNU Make”.#include < stdio.h > #include < OpenNI.h > using namespace openni; int main ( void ) { Status rc =
bryan sammon
c++ c++11 noexcept gcc4.7
I am having some trouble wrapping my head around noexcept.template <int SIZE> int pop(int idx) noexcept(noexcept(SIZE > 0)) // this is what I dont understand {if (idx <= 0)throw std::out_of_range(“My array doesnt go that high”);return idx; }This is just a simple function, but you see how it only throws an exception when idx <= 0, I dont understand. So in my specification, noexcept(idx > 0), I am trying to tell the compilier this function ONLY throws no exceptions if idx > 0. Am I
????
c++ c++11 gcc4.7
I’ve been playing with user defined constants in gcc 4.7.2 and ran into some sort of size limiting factors which I do not quite understand.The idea was to define a constexpr operator “” for fixed point decimal type. I want to avoid casting from double but rather parse mantissa and exponent at compilation time using variadic templates. The mantissa parsing proved a bit tricky.When I enable any of the 3 disabled lines at the bottom of the code below, gcc falls into infinite loop and hangs there. I
sema
gcc ubuntu compilation ubuntu-12.04 gcc4.7
Since several versions of GCC and Ubuntu I am experiencing annoying issues with paths and naming of several header and object files that are necessary for the installation of GCC.Description: After installing ubuntu (e.g. in my case 12.04) and installing all prerequisites of the gcc, I run the following commands:sudo mkdir /usr/local/stow/gcc-4.8.0 ./configure –prefix /usr/local/stow/gcc-4.8.0 make sudo make installFor the sake of completeness, the rest of the installation procedure:cd /usr/loc
Mat
c++ g++ openmp opensuse gcc4.7
Using the sample code at http://openmp.org/wp/openmp-compilers/, I tried to run the simple program on my Linux machine (running OpenSUSE 12.2) but failed to get it to compile.Here is the sample code.#include <omp.h> #include <stdio.h> int main() { #pragma omp parallel printf(“Hello from thread %d, nthreads %d\n”,omp_get_thread_num(), omp_get_num_threads()); }Snippet from the Terminal.Go Trojans >g++ -fopenmp try_openmp.cpp /usr/lib64/gcc/x86_64-suse-linux/4.7/../../../../x86_64-su
ildjarn
c++ c++11 opencl gcc4.7
I need to run several C++11 threads (GCC 4.7.1) parallely in host. Each of them needs to use a device, say a GPU. As per OpenCL 1.2 spec (p. 357):All OpenCL API calls are thread-safe75 except clSetKernelArg. clSetKernelArg is safe to call from any host thread, and is safe to call re-entrantly so long as concurrent calls operate on different cl_kernel objects. However, the behavior of the cl_kernel object is undefined if clSetKernelArg is called from multiple host threads on the same cl_kernel o
J.N.
c++ c++11 gcc4.7
I have the following function defined in a header file (the library it is part of aims at being header-only):typedef bool (*FieldComparer)(const std::string&, const std::string&);inline FieldComparer GetComparer(const std::string& query, string& separator) {if (query.find(‘=’) != std::string::npos) {separator = “=”;return [](const string& s1, const string& s2) { return s1 == s2; };}else if (query.find(‘^’) != string::npos) {separator = “^”;return [](const string& s1,
Potatoswatter
c++ osx dyld gcc4.7
I’ve compiled a command-line tool against some C++ dynamic libraries using GCC 4.7 on Mac OS X 10.8. On the development system, the compiler was installed by MacPorts into /opt/local and the libraries reside in /usr/local/lib. The dynamic libraries are compiled from source alongside the program. (But they’re built by cmake and I don’t want to mess with that system.)When I try to run it on another machine by putting the necessary dylibs into the executable’s directory and DYLD_LIBRARY_PATH, it co
ThinkingStiff
android c++ shared gcc4.7
This is a weird setup here. I compiled a custom NDK with GCC 4.7 (for Debian armhf chroot host). In testing, it compiles and runs regular c and c++ binaries on Android perfectly. When trying to compile a test shared library with C++ using:arm-linux-androideabi-g++ -fPIC -shared test.cpp -lstdc++ -o test.soI get numerous linker errors to _staticinitialization_destruction and _dso_handle being unreferenced.I have both libstdc++.a and libstdc++.so available in the lib folder under arm-linux-android
Bo Persson
gcc include atomic gcc4.7
I’ve just compiled GCC 4.7 to work with stdatomic.h, but I can’t seem to -I it. stdatomic.h seems to live in /usr/include/c++/4.4.3, but then the linker tells me it needs a bunch of other files in dirs nearby. If I -I all of them, I still get the error undefined reference to atomic_flag_clear_explicit. Any ideas how I’m supposed to link this right?
user1594322
c++ gcc c++11 gcc4.7
Here’s what I am trying. MinGW g++ 4.7.0.#include <iostream> #include <string>class Fruit { public:enum Value { APPLE, ORANGE, BANANA, NONE };static const Value VALUES[4] = { APPLE, ORANGE, BANANA, NONE };Fruit (Value v = NONE) : v_(v) { };std::string to_string () const {switch (v_) {case APPLE: return “apple”;case ORANGE: return “orange”;case BANANA: return “banana”;default: return “none”;}} private:Value v_; };int main (int argc, char * argv[]) {for (Fruit f : Fruit::VALUES)std::co
Yu Hao
c++ gcc standard-library gcc4.7
I am a bit of a newbie as far as dealing with compilation/linking errors. I’m working with a large C++ code (there are a few C files as well). I have successfully been running it on a Mac, compiled with g++. Now I need to run it on a Linux-based cluster because it is too slow on my Mac. The code consists of several libraries that I have to compile, plus my own code that uses the libraries. I can compile all of the code on the cluster using the default g++ compiler. However, unfortunately,
didymos
gcc compilation gcc-warning gcc4.7
I am trying to compile local version of gcc 4.7.3 on the cluster. For configuration:./configure –prefix=$HOME/opt/gcc-4.7.3 –with-gmp=$HOME/opt/gmp –with-mpfr=$HOME/opt/mpfr –with-mpc=$HOME/opt/mpc –with-libelf=$HOME/opt/libelfwhile compiling I got:/home/users/didymos/opt/gmp/lib/libgmp.a(pprime_p.o):(.text+0x448):undefined reference to `__multi3’/home/users/didymos/opt/gmp/lib/libgmp.a(mod_1.o):(.text+0x158):undefined reference to `__multi3’/home/users/didymos/opt/gmp/lib/libgmp.a(mod_1.o)
Alex
linker-error static-linking icu unicode-string gcc4.7
I am trying to compile my project where I’ve declared as class members some:icu::UnicodeString label; icu::UnicodeString tags; icu::UnicodeString domain; icu::UnicodeString data;After having included (yes it is found)#include <unicode/unistr.h>In my CMakeLists.txt it searches, finds and links with: icuuc icudata (libicuuc, libicudata) as the output suggests prior to throwing the errors:-o icarus -rdynamic -lPocoNet -lPocoUtil -lPocoXML -licuuc -licudataI have built and installed from sourc
segfault
c++ qt gcc4.7
I’ve been developing with CentOS, Qt 4.7, and GCC 4.4I’ve just installed Red Hat Developer Toolset 1.1 which includes GCC 4.7.2, and at the end of make, I get an error /usr/bin/ld: ../../bin/Solo: undefined reference to symbol ‘pthread_rwlock_trywrlock@@GLIBC_2.2.5’ /usr/bin/ld: note: ‘pthread_rwlock_trywrlock@@GLIBC_2.2.5’ is defined in DSO /lib64/libpthread.so.0 so try adding it to the linker command line /lib64/libpthread.so.0: could not read symbols: Invalid operation collect2: error: ld ret
Prakash
gcc gcc4.7
I was trying to write a plugin based upon following link : http://www.codesynthesis.com/~boris/blog/2010/05/03/parsing-cxx-with-gcc-plugin-part-1/.Below is my code:#include <stdlib.h> #include <gmp.h>//#include <boost/cstdlib.hpp> // Include before GCC poisons// some declarations. #include <gcc-plugin.h>#include <config.h> #include <system.h> #include <coretypes.h> #include <tree.h> #include <intl.h>#include <tm.h>#include <cp/cp-tre
devnull
gcc dynamic-linking gfortran gcc4.7
My distro (CentOS 6.3) comes with gcc 4.4.6. Since I wanted to try out the Fortran2003 features I decided to compile gcc 4.7.I followed the steps I found online: compiled separately first gmp, mpc, mpfr, ppl and cloog and the compiled gcc.I run the configured script as:configure –prefix=… –with-gmp=… –with-mpfr=… –with-mpc=… –program-suffix=-4.7 –enable-cloog-backend=isl –with-ppl=… –with-cloog=… –disable-multilibThis worked all right and I was able to compile with make &
Subramanian Ganapathy
boost macports gcc4.7 cpp-netlib
I’ve run into a very very hairy issue. My end goal is to build the cpp-netlib. cpp-netlib uses C++-11, it was throwing linker errors with original boost build in my machine. The reason I’d built boost using the default gcc installed in my machine, which works just fine. However, following the steps given in http://www.boost.org/doc/libs/1_53_0/more/getting_started/unix-variants.html {section 5.2 onwards} does not seem to help me. I’m getting errors like this..failed gcc.link.dll stage/lib/libboo
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