I installed both correctly, but it doesn't matter if I set up the path to compiler correctly or not because it can't find gcc and g++. I checked it with explorer, they were at the correct location. I tried everything I could, even I ran Eclipse in backwards compatibility mode and as an administrator.
EDIT: I'll using Visual Studio 2012 for a while if Eclipse can't be at least as user friendly to having find a solution to the problem under one hour via web.
Download this , chose the desired compilers (gcc and g++) . Make sure you have the value C:\mingw64 in PATH variable under environment variables .
I had to reload my workspace in order to get Eclipse to recognize that.
Also, I had updated the Path variable.
Please follow the same in your case.
I couldn't make the Eclipse (LUNA) to find MinGW on my computer (there were no MinGW available in Preferences>C/C++/New C/C++ Project Wizard) even after I have specified PATH as "C:\MinGW\bin" in Preferences>C/C++/Build>Environment, so what I did afterwards was:
Create a simple "Hello world" C project without specifying any toolchains
(at this step I tried to Build All, and it failed)
Go to Project>Properties, suprisingly, here I could see MinGW GCC as an available choice for Current toolchain. Select it.
Now I could build and run the project
Hopefully, it helps!
Related
My I use Eclipse Mars and MSYS2. Eclipse does not recognize my MSYS2 installation. It contains Mingw-w64 for 32 bit compilation. Things I have found on the Internet did not work. What should I do?
Well, a bit late to the party, but it looks like there is nothing special about MSYS2: the usual procedure of setting up Eclipse to work with MinGW-w64 installation worked for me just fine.
The main issue is that as described in Eclipse CDT FAQ to detect MinGW toolchain CDT tries to find mingw32-gcc.exe in PATH, while MinGW-w64 have only gcc and i686-w64-mingw32-gcc.exe in its bin directory, so just adding MinGW-w64 bin directory to PATH won't work:
Despite having g++.exe or gcc.exe on your PATH and having defined
MINGW_HOME, you may still get a “Toolchain "MinGW GCC" is not
detected” message (CDT 8.4 on Luna 4.4.0). Make sure that a file
called "mingw32-gcc.exe" exists in MINGW_HOME\bin.
As it mentioned further in Eclipse CDT FAQ, the easy fix would be to copy i686-w64-mingw32-gcc.exe to mingw32-gcc.exe:
If it doesn't exist
(which happens with MinGW-W64), copy a -gcc.exe file (e.g.
i686-w64-mingw32-gcc.exe) to mingw32-gcc.exe. If the dreaded message
still lingers around, reboot your system (don't just logout and
login).
After you did the copying described above, you can add MinGW-w64 bin directory to PATH and Eclipse will recognize the MinGW-w64 installation as MinGW toolchain. Since I don't like idea of polluting neither system nor user environment variables in Windows settings, I usually write a short batch file which adds MinGW-w64 bin directory to PATH and then starts Eclipse for me:
SET PATH=c:\msys32\mingw32\bin;%PATH%
START c:\eclipse\eclipse.exe
Even more later to the party - for me worked this solution: Right click project -> Properties -> C/C++ Build -> Environment: set environment variable MINGW_HOME to C:/.../msys64/mingw64 click OK, and rest is automatically done by eclipse
A colleague got a new mac, and he codes with Eclipse and gfortran. And Makefiles. But now he cannot build.
I figured that Eclipse does not use the same PATH as shell, so while Eclipse is happy to build with a makefile, it cannot find gfortran. (The Makefile works fine when ran form the mac terminal.)
Eclipse can build, if I put the full path in the Makefile (FC=/usr/local/bin/gfortran). But this is extra nuisance when other people use Ubuntu where gfortran has a different path.
Question: How/where to configure Eclipse (Juno) so that it can find gfortran? (I could not find, I tried.)
Why not just use Photran. It is based on Eclipse and is set up for Fortran.
Okay, so i wiped my PC clean today. Upon attempting to install Eclipse and the JDK i hit a snag.
I install the "ADT Bundle" from android developers.
I install the JDK to the default path
When i try to open Eclipse, it cannot find my JRE (which from what i understand comes in the JDK which i downloaded from the oracle website). I know it is properly installed because i can navigate to the install path and run java programs using the exe.
iv heard something about modifying environment variables to get it to find it but nothing has worked... i dont have a "PATH" variable listed.... i do have a "Path"... but changing either one does nothing to fix the problem... I have done this installation many times and it SHOULD be working...
any help on the subject would be greatly appreciated.
Since you wiped it clean, have you tried downloading Java Runtime Environment again (maybe you wiped it too)
The solution to this problem is such:
The "Path" enviroment variable needs to be under -user variables- NOT system variables
make a new user variable named "Path" and set the value to the absolute path of the java compiler
for me it was something like C:\Program File\Java\JDK1.7\bin
that should fix the problem of eclipse not finding the JDK/JRE...
if it complains about "JNI" then you need to make sure you are running the JDK and eclipse as the same achitechture (64bit java wont work with 32bit eclipse)
The "Path" environment variable needs to be defined or updated. If you are working in Windows 8 then you can navigate by following these steps:
Open > File Explorer
Right Click "Computer"
Select "Properties"
On the left hand side select "advanced system settings"
Under the "Advanced" tab, select "Environment Variables"
Locate the Path directory in the list under System
Edit the directory by entering a semi-colon after the last entry and then manually typing the location of your Java directory.
After the full address is entered, (Should look similar to --> C:\Program File\Java\JDK1.7\bin) click "Ok" on the screen to save your changes.
Something to keep in mind while updating your path. Make sure that you direct the path to the compatible version. If you downloaded the 64 bit eclipse, choose the 64 bit Java. If you do not remember the Eclipse version you downloaded, check your download file name against the files offered on Eclipse's website. If you follow these steps Eclipse should open up without a problem.
I cannot run my Ant build.xml since I updated to java 1.7.0_52 (or there about). I have been running it for years through Eclipse locally on my Windows 7 laptop - but with this latest jave jdk update somethings different (?).
BUILD FAILED
C:\workspace\WaterAspectsModel3\build.xml:329: Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK.
It is currently set to "D:\Morten\Java\jdk1.7.0_52"
This is my jdk! So JAVA_HOME is pointing to a jdk (as is also clear from the error message). I have my JAVA_HOME with bin folder in my path as always. I've configured Eclipse - external tools configuration - with a JRE pointing to the same D:\Morten\Java\jdk1.7.0_52 (through "Separate JRE" setting). And I've tried a number of other configurations - all without luck.
I've been reading the tonnes of answers on lists here and other places and think I've tried all suggestions. Most seem to be cases where JAVA_HOME actually points to a jre and just needs to be corrected to jdk or there's a ";" in the path or something like that. None of these seem to apply in my case.
Any suggestions?
I was having the same message when running ANT through Eclipse.
What worked for me:
In Eclipse, access the menu: "Window -> Preferences";
Access "Ant -> Runtime", at the tree;
Access the Classpath tab;
Expand the "Global Entries" item;
Inside Global Entries, the path to tools.jar was wrong. It was pointing to an older version of Java;
I removed the wrong entry and added the correct one with "Add External Jars" button. It worked.
The solution
"Had to copy C:\Program Files\Java\jdk1.6.0_10\lib\tools.jar to C:\Program Files\Java\jre6\lib\ext" from here was great helpful and worked for me.
The real message is that Ant can't find com.sun.tools.javac.Main.
Which, together with the fact that the latest "Sun" (Oracle) JDK is 1.7.0_13 (or maybe _14, but definitely not the "_52" that your install dir indicates), makes me think that you're not using a distribution that Ant recognizes. You can verify this by running jar tvf $JAVA_HOME/lib/tools.jar, and looking for that class.
The Ant Manual talks about ways to work with different compilers. Since I've only used "Sun" compilers, I'm afraid that I can't give you any pointers.
Edit: you could also try setting fork="yes" in your build file. This should run the compiler executable rather than trying to invoke the compiler class.
Try adding JAVA_HOME\bin to your env PATH .
Add JAVA_HOME to Eclipse-Preferences-Java-Build Path-Classpath Variables.
Sorry for the unearthing,
I had the same problem, my solution doesn't need any modification in environment variables, and works for a recent JDK where the tools.jar can't be found.
Just go in the small down-arrow next to the ant run button
Then click "Configure external tools"
Then in JRE tab
Select a JDK installed on your computer, not a JRE, no problems if the selected JDK is not the same JDK/JRE as in your project.
It should be work now.
I've downloaded C/C++ libraries from Cygwin, and set the environment variables according to the instructions here, in NetBeans.
I've also gone through this.
Actually I followed the same steps on a different machine and everything worked out fine.
But on my machine the associations aren't made.
for example: #include<stdio.h> says No such file or directory.
Any idea what the problem might be?
The Cygwin package I downloaded is also fine, I downloaded it twice.
If it's complaining about a #include, that's a compile issue, not a linking issue.
What happens if you create a new C/C++ application project and try to build it?
In the Build node of the project properties, is the correct Tool Collection selected? (Cygwin in your case). And the Tools -> Options, on the C/C++ tab, is that tool collection set up correctly?
You should check whether you have a file c:\cygwin\usr\include\stdio.h.