I have installed:
Eclipse IDE for C/C++ Developers
Version: Mars.1 Release (4.5.1)
And I'm tring to execute a working code (already tested).
So I have done:
File -> New -> C++ Project
Than I click on next, next, finish... so without changing anything.
As it is suggested in http://wiki.eclipse.org/CDT/User/FAQ:
Open Project Properties->C/C++ Build->Settings->Tool Settings->GCC C++ Compiler->Miscellaneous->Other Flags. Put "-std=c++0x" at the end.
Than I did the following:
Open Project Properties->C/C++ Build->Settings->Tool Settings->Cross G++ Compiler->Miscellaneous->Other Flags. Put "-std=c++0x" at the end.
I have tried to put -std=c++11 instead of -std=c++0x but nothing changed.
But I still got the following on-the-fly in-the-editor suggestion:
Symbol 'chrono' could not be resolved
The errors are like the following one: "Function 'now' could not be resolved"
No, Tom Mekken, I did not.
How can I set up the paths of the chrono library ?
Related
I was trying to include the GMP library, which was simply the code below(I did nothing else):
#include <gmpxx.h>
However, when I tried to compile the code, the following error from g++ compiler occured:
myCode.cpp:3:10: fatal error: gmpxx.h: No such file or directory
#include <gmpxx.h>
^~~~~~~~~~~~~~~~~~~~~~
I have tried everything I searched online, putting the GMP lib here and there, adding INFINITE includepaths in c_cpp_properties.json, still, it keeps showing the message, although, I can find the file through "Go to Definition" option.
Is there any known solution to this?
It's not enough to configure VS Code includes, you need to pass those options to the compiler as well.
You don't mention your platform at all, so I'm going to use an example from my personal machine, a Macbook Pro with the fmt library.
When compiling with the fmt library, I have to provide three more options to the compiler.
-I/usr/local/include // Tells the compiler where to look for extra includes
-L/usr/local/lib // Tells the compiler where to look for extra libraries
-lfmt // fmt-specific command to use fmt library
So the full command ends up looking like this:
g++ -Wall -std=c++17 -I/user/local/include -L/usr/local/lib -lfmt main.cpp
I need all three options because fmt is installed in a non-standard location that the compiler doesn't check by default. According to the documentation, you can get away with just -lgmp and -lgmpxx if you installed the library in a standard location (happens by default with *nix and a package manager, I imagine).
If you use build tasks in VS Code, this can be set up and automated for you.
I am attempting to setup SDL2 for C++ with Eclipse on Windows 7.
In order to do so, I am following the tutorial in this link, which states that I must first install MinGW. So I follow the link provided in order to setup MinGW. I follow all the steps without issue. I then open Eclipse and attempt to build a simple hello world program:
#include <iostream>
using namespace std;
int main() {
cout << "Hello World!" << endl;
return 0;
}
To my surprise, this code doesn't build, with 6 errors.
I then proceed to simplify the program further:
int main()
{
return 0;
}
This also does not compile. There are two errors:
Program "g++" not found in PATH
Program "gcc" not found in PATH
Here is a screenshot.
However, my path does contain "C:\mingw\bin". I have also tried changing this to "C:\mingw". Looking inside "C:\mingw\bin", I find gcc and g++:
In addition, compiling a test program using the command line (g++ Test.cpp -o Test) works just fine, as does "g++ -v".
I have been searching the web for hours, and can't seem to find an answer as to why Eclipse can't seem to compile anything with MinGW. Questions I have looked at on SO (which haven't been able to fix my issue) include:
Eclipse mingw binary not found
Eclipse not finding c std libraries
g++ not found in path
Eclipse C++ : "Program g++ not found in PATH"
Program g++ not found in path
Program g++ not found in path C++ [duplicate]
Eclipse CDT (Juno) in Win7: Cannot find g++ in PATH, iostream unresolved and other fun stuff
Additional info:
Window > Preferences > C/C++ > Build > Settings > "CDT GCC Built-in Complier Settings MinGW [Shared]" : Toolchain MinGW GCC is not detected on this system.
I have also reinstalled Eclipse to no avail.
I realize that this may be a duplicate question of some that I have linked, but the information in previous questions have not been able to fix my problem, and I fear that adding a comment to an old question may not result in an answer.
Please request additional information as needed.
You need to set the environment for the c/c++ builder.
First you need to install the GNU tool-chain, you can choose either MinGW or Cygwin. You can see the steps here. I used MinGW.
Go to Window->Preferences->C/C++->Build->Environment and add a new variable, name it whatever you want for example a named it "MINGW", now paste the binaries directory of MinGW which is by default C:\MinGW\bin, you should have something like this:
Now when you create a new project you just have to select the MinGW tool-chain:
Hope that helps.
It appears as though I have fixed the problem for the moment.
In case others encounter the same issue:
Project > Properties > C/C++ Build > Settings > MinGW C++ Linker > Command changed from "g++" to "C:\mingw\bin\g++".
I have the following code in eclipse:
I'm running Indigo SR 2, 64bit with CDT Version: 8.0.2.201202111925 Build id: #build#
I have the Java SDK, Android SDK, and C++ CDT.
I Believe the problem is only happening with c++ 11 functions: it seems Eclipse's internal code analyzer CODAN is not properly finding the libraries, even though the compiler is (i have the std=C++11 flag on my compilers).
I think this topic is related: http://www.eclipse.org/forums/index.php/t/490066/
#include <iostream>
#include <array>
using namespace std;
int main(){
cout << "test";
array<int,5> myints;
int x = 0;
cout << "size of myints: " << myints.size() << std::endl;
cout << "sizeof(myints): " << sizeof(myints) << std::endl;
return 0;
}
and I'm getting an error/ not compiling because I'm told:
Symbol 'array' could not be resolved
Why am I not compiling? I'm using eclipse indigo with the CDT and cygwin. I can provide more info as necessary.
UPDATE: I compile through eclipse (hammer button or right click project and click build) using Cygwin GCC and the Cygwin PE Parser.
Update 2: Running in indigo gives both an error in editor and a fail to compile, Kepler gives me the error, but seems to succeed running and compiling. Is there a way to make the error go away in kepler? Also, how would I get the actual command being passed to the compiler from within eclipse?
Update 3: More weirdness, after compiling in Kepler, it now compiles in indigo as well, though the errors persist in the text editor in both version.
1) Is there a way I can make these errors more accurate to the compile?
2) I can press f3 on the include and view it's source, so why can't eclipse seem to find the array symbol?
3) I'm also being told that the first std::endl is an Invalid overload of 'std::endl'
Update 4: I tried std::tr1::array<int, 3> arr1 = {1, 2, 3}; and it's still telling me that array cannot be resolved. I've added -std=c++11 to my c/C++ Build -> Settings -> Cygwin C++ Compiler -> Miscellaneous -> Other flags. It now reads: -c -fmessage-length=0 -std=c++11 But I'm seeing no change at this point
Update: This question seems to be getting at the problem:
Eclipse C/C++ Shows Errors but Compiles?
However, I've added a link to the directory "D:/Wamp/cygwin64/lib/gcc/x86_64-pc-cygwin/4.8.2/include" and it hasn't changed anything...
Thanks!
I think I got this resolved by changing the following settings:
Project->Properties->C/C++ General/Preprocessor Include Paths, Macros Etc. -> Providers (tab)
Then "CDT GCC Built-in Compiler Settings" -> click the link "Workspace Settings"
"CDT GCC Built-in Compiler Settings" (again), under "Command to get compiler specs:"
add: "-std=c++11"
It took a refresh and then the little red squiggles went away.
This was the source:
http://www.eclipse.org/forums/index.php/mv/msg/373462/909018/#msg_909018
I also tried following this:
http://scrupulousabstractions.tumblr.com/post/36441490955/eclipse-mingw-builds
but it didn't exactly work. Probably because I'm on Ubuntu.
I had added "-std=c++11" to the end of the "Command to get compiler specs" within Workspace Settings > C/C++ > Build > Settings > Discovery (tab) > CDT GCC Built-in Compiler Settings"...
And I had set my project so "Enable project specific settings" was disabled, under Properties > C/C++ General.
But still I got C++11 related CODAN errors.
I just discovered that unchecking "Enable project specific settings" does not guarantee the project will use the Discovery settings from the workspace. You still have to go in your project to Properties > C/C++ General > Preprocessor Include Paths, Macros etc. > Providers (tab) > CDT GCC Built-in Compiler Settings ... and make sure the option "Use global provider shared between projects" is checked (which it is not by default on my system, running Eclipse IDE for C/C++ version 2019-09 R). With this option checked "CDT GCC Built-in Compiler Settings" now shows [ Shared ] next to it.
There are a few other discovery providers where you need to set a similar option to ensure [ Shared ] shows up in the list (if you are trying to have your workspace settings apply). The "CDT User Settings Entries" I leave as project-specific, but the others I share in order to use the workspace-level settings.
CODAN is now working properly, and I no longer need to manually "freshen" the indexes and/or add #include statements to nudge CODAN along.
C/C++ Build -> Settings -> Tool Settings -> Cross G++ Compiler -> Dialect -> Language standart -> select which one you want to use.
You don't need to add "-std=c++11" anywhere else
I am trying to setup MingW and Code::Blocks on my Windows 8 64 bit laptop, and I'm facing some problem while building a main.cpp file. These are the versions that I have installed:
x86_64-w64-mingw32-gcc-4.7.4-release-win64_rubenvb.7z for MingW (4th one in that list), and
codeblocks-12.11-setup.exe for Code::Blocks.
I've set the path to mingw64\bin in the environment variable. Also, in the Code::Blocks compiler settings, I have set path for all ToolChain Executables. There are two gcc in the MingW bin path. One is - gcc.exe and other is - x86_64-w64-mingw32-gcc.exe. Same for C++ Compiler, Linker for static and dynamic libs. Now when I try to build a simple Hello World file, it shows some errors:
obj\Debug\main.o -- In function swscanf
c:\mingw\mingw64\bin\..\lib\gcc\x86_64-w64-mingw32\4.7.3\..\..\..\..\x86_64-w64-mingw32\include\wchar.h -- undefined reference to `__gxx_personality_sj0'
obj\Debug\main.o -- In function `wscanf':
c:\mingw\mingw64\bin\..\lib\gcc\x86_64-w64-mingw32\4.7.3\..\..\..\..\x86_64-w64-mingw32\include\wchar.h -- undefined reference to `__gxx_personality_sj0'
Similarly there are many errors and undefined references for - fwprintf, wprintf, std:cout, etc..
I'm sure there is some configuration problem, but I cannot find out what's the issue. Can any one take a look at the problem.
Here's the code I'm running:
#include <iostream>
using namespace std;
int main()
{
cout << "Hello world!" << endl;
return 0;
}
If you don't require 64 bit support, consider downloading "codeblocks-12.11mingw-setup.exe"
It packs its own 32 bit mingw and has everything preconfigured for you.
Otherwise, if you still need to compile amd64 apps:-
Assuming you extracted to D:\Mingw64, under the "Tool Chain Executables" tab, set the "Compiler's Installation Directory" to "D:\Mingw64\bin", Then click auto-detect to check whether code::blocks likes what it finds.
If everythings Ok, make sure the rest of the fields are as follows:-
C compiler: x86_64-w64-mingw32-gcc.exe
C++ compiler: x86_64-w64-mingw32-g++.exe
Linker for dynamic libs: x86_64-w64-mingw32-g++.exe
Linker for static libs: x86_64-w64-mingw32-ar.exe
Debugger: GDB/CDB Debugger...
Ressource compiler: x86_64-w64-mingw32-windres.exe
Make program: mingw32-make.exe
Click on the "Additional Paths" tab and enter the following line:- (the path is correct for ver 4.7.4,the one you downloaded. It ends with 4.7.3)
D:\Mingw64\libexec\gcc\x86_64-w64-mingw32\4.7.3\
Click on the "Search directories" tab to the imediate left "Toolchain Executables"
Add the following paths:-
D:\Mingw64\include
D:\Mingw64\x86_64-w64-mingw32\include
D:\Mingw64\x86_64-w64-mingw32\include\c++\4.7.3
D:\Mingw64\x86_64-w64-mingw32\include\c++\4.7.3\backward
D:\Mingw64\x86_64-w64-mingw32\include\c++\4.7.3\x86_64-w64-mingw32
D:\Mingw64\lib\gcc\x86_64-w64-mingw32\4.7.3\include
Click on the "linker" tab and add the following paths:-
D:\Mingw64\Lib
D:\Mingw64\x86_64-w64-mingw32\lib
And finally click on the "Compiler Settings tab", Click on "Other options" and add:-
-m64
One last thing-> remember to save those settings to disk!
If it crashes while you test this new config, you might wish you had!
Do this (I think) either by "File->Save Everything" or restarting code::blocks ...without another instance running.
Try compiling something then share the outcome
Peace! Dear brother, I think you need this:
(1)
std::cout << "Hello world!" << std::endl;
You need to put "std::function_name" whenever you are using a predefined function from iostream.h, because this is you way access it in GCC, which Code::Blocks uses.
(2) Try it compiling by omitting "using namespace std;" from your code.
Because I've compiled C and C++ code many times in Code::Blocks on 32-bit Windows XP, and it did!
(3) Make sure the path is set to the directory "mingw\bin".
(4) Ensure if you have 64-bit MinGW installed and path set to its "bin" directory (if you want to compile for 64-bit). It will compile for 64-bit by default.
(5) Try the flags/arguments "-m32" and "-m64" for compiling for 32- and 64-big respectively.
So working on getting my eclipse IDE going so I can develop my arduino uno in eclipse.
My C++ is weak so this is probably a nube error on my part.
I have a blink program that looks for an arduino library I compiled from the arduino IDE's library.
My code points to the header file and my code find it fine; meaning I can click on:
#include <arduino.h>
and go view the header
this: "C:/programs/arduino-1.0/hardware/arduino/cores/328p_lib/libuno_library.a"
is a valid path... but I get the following error:
>****** Build of configuration Debug for project project1 ****
>make all
>Building target: project1.elf
>Invoking: AVR C++ Linker
>avr-g++ -Wl,-Map,project1.map,--cref -L"C:\programs\arduino->1.0\hardware\arduino\cores\328p_lib" -mmcu=atmega328p -o "project1.elf" ./code/code1.o >-l"C:/programs/arduino-1.0/hardware/arduino/cores/328p_lib/libuno_library.a"
>c:/programs/winavr/bin/../lib/gcc/avr/4.3.3/../../../../avr/bin/ld.exe: cannot find ->lC:/programs/arduino-1.0/hardware/arduino/cores/328p_lib/libuno_library.a
>make: *** [project1.elf] Error 1
>**** Build Finished ******
Well after wasting 2 days or so of fun time I finally found the problem.
http://sourceforge.net/projects/avr-eclipse/forums/forum/664382/topic/4640554
When adding the static library to the linker you have to remove the lib prefix and the .a suffix. not sure what that is about.
Right click on the project>Click on C/C++ BUild> Settings > GCC C++ Linker> Libraries
Click the first icon Add> Add the library name ( without the .a suffix, the suffix will be added automatically)
This will ensure that the library is added to the project.
If the library is part of another project >Go to GCC C Compiler> directories >Add the directory
This will ensure that the library is there for getting the compilation done.