Need to debug a JAR file "ProA", so import the source code in the project,
but there is a strange error in Eclipse while trying to set a breakpoint.
Detail as below:
Unable to install breakpoint due to missing line number attributes.
Modify compiler options to generate line number attributes.
I have try to several method to solve, but failed.
Under Window > Preferences: Java > Compiler > Classfile Generation, all options have to be to True
In .settings folder of your project, look for a file called org.eclipse.jdt.core.prefs. Verify or set org.eclipse.jdt.core.compiler.debug.lineNumber=generate
Add the debug=true flag in the build.xml, just like this:
Any help will be appreciated.
解决方案
I have had the same problem, but reading your post helped me resolve mine. I changed org.eclipse.jdt.core.prefs as follow:
BEFORE:
eclipse.preferences.version=1
org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
org.eclipse.jdt.core.compiler.compliance=1.7
org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
org.eclipse.jdt.core.compiler.source=1.7
AFTER:
eclipse.preferences.version=1
org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
org.eclipse.jdt.core.compiler.compliance=1.7
org.eclipse.jdt.core.compiler.debug.lineNumber=generate
org.eclipse.jdt.core.compiler.debug.localVariable=generate
org.eclipse.jdt.core.compiler.debug.sourceFile=generate
org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
org.eclipse.jdt.core.compiler.source=1.7
Another way to modify these options within the Project> Properties> Java Compiler. So, there is no need to modify manually the org.eclipse.jdt.core.prefs file. There you need to make sure that the Classfile Generation options are checked.