Debugging with GDB Manual
Page
 Table of Contents
 Breakpoints
Continuing and stepping Signals
Print settings Value history
Stack frames
 Examining the Symbol Table
 Specifying a Debugging Target
 Batch Mode
Stop when freeing unallocated or deallocated blocks
Scramble previous memory contents at malloc/free calls
Commands for heap profiling
 Enhancements to the dumpcore command
Support for the info target Command
Support for the dumpcore command
Example Illustrating Execution Path Recovery
 Debugging the application using GDB under Aries
Command for evaluating the address of an expression
Support for steplast command for C and C++
Detecting memory leaks using GDB under Aries
 HP-UX Terminal User Interface
 User-defined commands 287 18.2
Miscellaneous commands 265 16.3
Setting Command History Feature in GDB 281 17.4
Command files 289 Commands for controlled output 290
 20.9 Invalidation notices 303
20.7 Errors 302 20.8
22.2 How to report bugs 361
304
 List of Tables
 List of Examples
 Summary of GDB
Free Software
Contributors to GDB
Page
 Contributors to GDB
Page
 Let us use GDB to try to see what is going on
Sample GDB Session
Loading the Executable
 Here we describe how to set a breakpoint
Setting Display width
Setting Breakpoints
Running the executable under GDB
 Stepping into a subroutine
Examining the Stack
Printing Variable Values
 Setting Variable Values During a Session
Listing Source Code
 Gdb c Continuing Definebaz,defnQUOTEfooUNQUOTE Baz
Page
 Getting In and Out of GDB
Invoking GDB
 Choosing files
Files
 Processed. See Command files
Choosing modes
 Time a stack frame is displayed which includes each
GNU Emacs sets this option when it runs GDB as a
Line number in a standard, recognizable fashion each
Like two `\032 characters, followed by the file name
 Emacs
 Quitting GDB
Redirecting WDB input and output to a file
Interface
 Shell commands
Page
 GDB Commands
Command syntax
Command completion
 GDB sounds bell press TAB again, to see
 Short list of named classes of commands
Getting help
Help , h
 Complete
Apropos reload
Results
This is intended for use by GNU Emacs
 Getting help
Page
 Starting your program
Running Programs Under GDB
Compiling for debugging
Arguments, so that you may use normal
 See Arguments To Your Program
Your program. SeeProgram Environment
Directory
 Arguments To Your Program
Program Environment
Program. See Program Input and Output
 Path environment variable
For example, this command
Display the list of search paths for executables
Do not supply varname, print the names
 Working directory
Program Input and Output
 Debugging a Running Process
 Killing the child process
 Debugging programs with multiple threads
 New process 35 thread
 With the command argument threadno
Here are commands to get more information about threads
Thread apply command allows you to
Display a summary of all threads currently
 Debugging programs with multiple processes
 Set the debugger response to a program call
New process. The mode can be
Unimpeded. This is the default
Fork. The child process runs
 Stopping and Continuing
Breakpoints
 Setting breakpoints
 See Break conditions page 59, for more
Breakpoints
 Whether
Breakpoint
Catchpoint
Breakpoint is
 Marked to be
When hit
Enabled
Breakpoints are
 Setting catchpoints
 Unloading of any dynamically loaded
Call to vfork. This is currently only
Is currently only available for HP-UX
Shared library, or the unloading
 Deleting breakpoints
Disabling breakpoints
Selecting a frame page 73 . When
 Break conditions
 Stops your program only if the value
Breakpoint, GDB prints an error message
No symbol foo in current context
Use condition, GDB checks expression
 Breakpoint command lists
 Breakpoint menus
 Cannot insert breakpoints
 Continuing and stepping
Conditions
 Function
 Setting breakpoints page 52. This form of the command
 Signals
Stops. See Automatic display
 Info handle is an alias for info signals
 Stopping and starting multi-thread programs
 Stopping and Continuing
 Examining the Stack
Stack frames
 Commands for Examining the Stack
Stacks Without frames
Backtraces
 Selecting a frame
 With an argument, this command is used to select a stack
Have existed longer. n defaults to one
When used without any argument, this command does not
Information about a frame
 Setting catchpoints
Page
 List
Examining Source Files
Printing source lines
Show listsize
 Searching source files
 Specifying source directories
 Source and machine code
Show directories
Contains
 Select the instruction set to use when
Set disassembly-flavor
Disassemble or x/i commands
Disassembling the program via
Page
 Expressions
Following forms of print command are supported
Examining Data
To See Artificial arrays page 85, for more information
 Type addr
Where it is defined. See Program variables
Program variables
Normally supposed to reside at addr
 You can print the contents of array with
Artificial arrays
 Output formats
 Print, s null-terminated string, or
Machine instruction. The default is
Examining memory
Time you use either x or print
 However, the count n must come first wx4 does not work
 See Output formats
Automatic display
For fmt specifying only a display format and not a size or
For fmt i or s, or including a unit-size or a number
 Print settings
 Symbolic form of an address
A symbol. This is the default
File name and line number of a symbol
Address
 Setting number-of-elementsto zero
Default is off
Strings. When GDB starts, this limit is set to
Short strings. The default is off
 Print using only seven-bit characters if this
This is the default format
Show which format GDB is using to print
Default
 Show whether C++ names in assembly listings
These settings are of interest when debugging C++ programs
Default is on
Would print
 Value history
 Convenience variables
 $exitcode
Command, in which case it is a pointer to the type of $
Format in which the data was printed
Program being debugged terminates
 Or print the instruction to be executed next with
Registers
Info registers Info all-registers Info registers regname
Or add four to the stack pointer3 with3with
 To get the bit pattern, try the following macro
Printing Floating Point Values
Floating point hardware
This is what the macro produces
 100
 List of filename extensions and languages
Using GDB with Different Languages
Switching between source languages
Cpp
 Having GDB infer the source language
Setting the working language
Not skip over function prologues when stepping
Files
 Displaying the language
Type and range checking
An overview of type checking
 An overview of range checking
 Supported languages
 C++
 Left shift, and right shift. Defined on integral types
Expressions is 0 for false and non-zero for true
Non-zero for true
Types and pointer types
 Expressions page 83. Same precedence as , above
Class types
Double colons also represent the GDB scope operator see
C++ constants
 1.3 C++ expressions
GDB expression handling can interpret most C++ expressions
 C++ defaults
Printing the variable or class returns
C++ type and range checks
 Breakpoint menus
GDB features for C++
GDB and C
See Breakpoint menus
 Fortran
Fortran types
Fortran types supported
 Greater than
Less than
Less than or equal to
Greater than or equal to
 Fortran special issues
Commonblockname
Block
 Examining the Symbol Table
 Symbols will be read when needed
Two commands give this output
As with whatis, using ptype without an
For example, for this variable declaration
 Do not replace symbol
Allow GDB to reload the symbols for
Replace symbol definitions
Once. This is the default
 Tell GDB to resolve opaque types. An opaque
Setting
Is in another source file. The default is on
Class, or union―for example, struct
 Altering Execution
Assignment to variables
 Continuing at a different address
Stores the value 4 into that memory location
 Giving your program a signal
You can use the following command to return from a function
Returning from a function
 Return , return
Calling program functions
Patching programs
Is used as the return value from the function value
 Patching programs
 124
 Commands to specify files
GDB Files
 See Optional warnings and messages
 Write the symbols for your program into a
Option with any of the commands that load
GDB has the entire symbol table available
Map in symbol information from this auxiliary
 Section
 If threshold is nonzero, symbols from all
Symbols were loaded. Both the commands list
To display or set the threshold, use the commands
New library has been loaded, until the symbol
 Specifying shared library locations
Names where the desired shared libraries reside. GDB
Searching the default system directories
Megabytes
 Errors reading symbol files
Verbose on. See Optional warnings
Messages
 GDB circumvents the error by ignoring this
Symbol scope block as starting on the previous
Is the symbol type of the uncomprehended
Debug your program, though certain symbols
 Commands for managing targets
Specifying a Debugging Target
Active targets
 See Commands to specify files
 Choosing target byte order
 Executable
Instruct GDB to assume the target is big-endian
Instruct GDB to assume the target is little-endian
Display GDBs current idea of the target byte order
 HP-UX Configuration-Specific Information
Summary of HP Enhancements to GDB
 Implementation of ask mode for set follow-fork-mode
Support for setting breakpoints using shared library name
 Command watchtarget
 HP-UX dependencies
Linker Dependencies
Dependent Standard Library Routines for Run Time Checking
 Abort Unlink Atoi
Getpid Close Srand Strchr
 Supported Platforms and Modes
 WDB Location
HP-UX targets
Support for Alternate root
GDB location
 None
Specifying object file directories
Librtc.sl location $WDBROOT/bin Opt/langtools/ n/a
Bin $WDBROOT/bin
 Fix and continue debugging
 Fix and Continue compiler dependencies
Fix and Continue restrictions
 Using Fix and Continue
 Example Fix and Continue session
Compile the program
Run the program
 Gdb edit
Gdb b main
Gdb run
Make the necessary changes. In this case, add return total
 Inline Support
Inline Debugging in HP 9000 Systems
Gdb q
 Inline Debugging in Integrity Systems
Breakpoint info frame disassembly
Following options available for the set inline-debugcommand
Step next list backtrace frame n info locals info args
 Limitations
Debugging Inline Functions in Integrity Systems
 Info frame disassembly
Debugging Macros
Viewing and Evaluating Macro Definitions
 Compiler Options to Enable Macro Debugging
Evaluating Macros
Debug=none
 Examples for Macro Debugging
 HP-UX Configuration-Specific Information
 Debugging Memory Problems
 When to suspect a memory leak
Memory debugging restrictions
Memory Debugging Methodologies
 Debugging Memory in Interactive Mode
 Heap growth. The default value is 100. Every
Displays all current settings for memory
This command are ignored from report. If
Command discards the data existing in the file
 Debugging Memory Problems
 Specific pattern when it is allocated or
Debugging when the string option is set for
Have occurred and WDB reports the problem
Such as attempting to access space that is freed
 Number of bytes, the debugger ignores it
Use the info command to show list of memory leaks
If the user specifies a value less than 16 for
User-specified value
 Debugging Memory in Batch Mode
Setting Configuration Options for Batch Mode
Gdb info leak
 Framecount=noframes or set heap-check frame-count noframes
Sets the number of frames to be printed for leak context
 For 64 bit PA applications
For 32 bit IPF applications
For 64 bit IPF applications
For 64-bit IPF applications
 Environment variable setting for Batch mode debugging
Ldpreload
 Log file for batch mode must be
Aborts execution when heap objects
Aborts execution when out of memory
Stderr error message goes to stderr
 Example for Batch Mode RTC
 Complete one of the following steps
 Rtcconfig file should contain entries such as the following
Preload the librtc library as follows
Run the program as follows
 For 32 bit PA applications
 Specifying the stack depth
Configuring memory debugging settings
Run the program Start a debugging session as follows
Specifying minimum leak size
 For example, if you use
Stop when freeing unallocated or deallocated blocks
Scenarios in memory debugging
Specifying minimum block size
 Syntax
Scramble previous memory contents at malloc/free calls
Interactive debugging mode set heap-check scramble on off
Detect dangling pointers and dangling blocks
 Detect in-block corruption of freed blocks
 Memory Debugging Commands in Interactive and Batch Mode
Off
 Heap Profiling
Commands for heap profiling
Point you use the info heap command
As the start of the heap, end of the heap, heap
 This example shows how to use this feature on HP-UX
Set a breakpoint
 Commands to track the change in data segment value
Changes for a given run
 Thread Debugging Support
Support for Enabling and Disabling Specific Threads
 Backtrace Support for Thread Debugging
Advanced Thread Debugging Support
 Enabling and Disabling Advanced Thread Debugging Features
Pre-requisites for Advanced Thread Debugging
 Mixed-sched-policy onoff The set thread-check
Onoff command checks if an application
Unlock-not-own onoff The set thread-check unlock-not-own
Cv-multiple-mxs onoff The set thread-check cv-multiple-mxs
 Command checks if any thread has terminated
This returns an Einval error to
User and prints a warning message when this
Different mutexes. The debugger transfers
 Exception or a cancel without joining or
When this condition is detected. This situation
Command checks if a thread has terminated
Created with the detach attribute. When an
 Condvar-id is provided, the command displays
Provided, the command displays extended
Is provided, the command displays extended
Rwlock-id is provided, the command displays
 For 64-bit PA applications
 Thread Debugging in Batch Mode
 Pre-requisites for Batch mode of Thread Debugging
For 64 bit IPF applications, set
For 64-bit PA applications, set
 And/Or
Set the environment variable Batchrtc to on as
 Opt/langtools/lib/hpux64/librtc.so
 Thread Debugging in +check Mode
Where Pid is the process id
Limitations in Batch mode of thread debugging
 Where pid is the process identifier
Issue
Debugging MPI Programs
 Support for showing unwind info
Ask mode for set follow-fork-mode
Serial mode for set follow-fork-mode
Debugger response to a program call to fork or vfork is ask
 Command to Search for a Pattern in the Memory Address Space
Printing CFM and PFS registers
 String value. The character pattern must be enclosed
Parameter is mandatory when end-addressis not
Specifies the length of the memory address range. This
Within double quotes. This parameter is mandatory
 Example 14-1 Sample Output for the find command
 Str0 Specifies the starting address
Using the /max-countparameter
Using the /size-charparameter
Specifies the pattern expr1
 Debugging Core Files
Generating core files with packcore /unpackcore/getcore
 Support for the info target Command
 When starting from the shell prompt
Support for the dumpcore command
When starting from the HP WDB command line
Enhancements to the dumpcore command
 Info rtti address
When starting from shell prompt
Support for display of run time type information
Sample Output
 Info exec-path summary
Info global-exec-path summary
Exec-path updownpathindex aliased to ep
 Example Illustrating Execution Path Recovery
Sample Program
Sample Debugging Session
 Command to Unwind Beyond 10000 Frames
 Aborting a Command Line Call
Invoking GDB Before a Program Aborts
 Deferred watchpoints
Instruction Level Stepping
Enhanced support for watchpoints and breakpoints
Hardware watchpoints
 Rbp
Support for procedural breakpoints
Support for template breakpoints
Rdp
 Using shared library as main program
Debugging support for shared libraries
 Setting Deferred Breakpoints in Shared Library
Using catch load
Privately mapping shared libraries
 Selectively Mapping Shared Libraries As Private
Opt/langtools/bin/pxdb -s on executable-name
 Debugging support for Decimal Floating Point data type
Setting breakpoints in shared library
Enhancement to the info shared Command
Printing Decimal Floating point data types
 Handling Decimal Floating Point Data types
Following are sample commands to print NaT registers
Printing NaT Registers
Evaluating Decimal Floating Point data types
 Comparison Operations
Assignment of Decimal floating point value to variable
Arithmetic Operations
Printing type of Decimal Floating Point variable
 This prints the binary floating point value as oat
Additional Support for binary floating point data type
Support for Binary Floating Point constants f, l
This prints the binary floating point value as double
 Java Stack Unwind Features
Language support
Enhanced Java Debugging Support
 Gdb Subcommands for Java VM Debugging
Gdb help java
 Info frame
Frame command of GDB has been enhanced to interpret a Java
Java and native stack frames
Stack frame
 Java attach mode debugging support
Java corefile debugging support
 Enhanced support for C++ templates
Syntax
 Support for fpreg data type on IPF
Support for Complex variables in HP C
Support for debugging namespaces
 Command for evaluating the address of an expression
Viewing Wide Character Strings
This is equivalent to executing
 Support for output logging
Support for dumping array in an Ascii file
 Displaying enumerators
Support for steplast command for C and C++
Support for Fortran array slices
Support for debugging typedefs
 Getting information from a non-debug executable
 Debugging optimized code
Break Call Clear Disassem List
Break Call Cond Jump Return Print Set var Watch Whatis
 HP-UX Configuration-Specific Information
 Debugging Optimized Code at Various Optimization Levels
14.29.1.1 +O0 and +O1
14.29.1.2 +O2/+O3/+O4/-ipo
 Following limitations apply when debugging optimized code
Debugging with Aries
+O2 or -O
 Debugging the application using GDB under Aries
Limitations of GDB Support under Aries
 Detecting memory leaks using GDB under Aries
Attaching GDB to an already running emulated process
 Visual Interface for WDB
Starting and stopping Visual Interface for WDB
 Navigating the Visual Interface for WDB display
Visual Interface for WDB GUI display
 Using the X-window graphical interface
Specifying foreground and background colors
 Using the TUI mode
Changing the size of the source or debugger pane
For dterm, use the following
 Saving the contents of a debugging session to a file
Using commands to browse through source files
Editing the command line and command-line history
Loading source files
 Support for command line calls in a stripped executable
Support for XDB commands
GNU GDB Logging Commands
Stop in/at dbx commands
 Execute the chatr -B immediate executable command
For 32-bit applications
 For 64-bit applications
Command line calls to non-stripped library
Support for debugging stripped binaries
Printing of locals and globals in a stripped module
 Displaying the current block scope information
Linux support
Syntax
 242
 Starting the TUI
Invoke the debugger using a command like the following
HP-UX Terminal User Interface
Main
 Automatically running a program at startup
Screen Layouts
 Source pane
Disassembly pane
Disassembly pane appears when you issue the command
Pane looks like this
 Source/Disassembly pane
Disassembly/Register pane
Source/Disassembly pane appears when you issue the command
 Source/Register pane appears when you issue the command
Source/Register pane
 Cycling through the panes
Use the commands
Toggle split-screen mode
Changing pane focus
 Fs regs Foc next
 Scrolling panes
Changing the register display
 Changing the pane size
 Refreshing and updating the window
 By-function lists of XDB commands and HP WDB equivalents
XDB to WDB Transition Guide
 Invocation commands
Invocation commands
Window mode commands
Window mode commands
 File viewing commands
File viewing commands
 Source directory mapping commands
Data Viewing and modification commands
 Data viewing and modification commands
Ll string Lm string
 Stack viewing commands
Stack viewing commands
 Status viewing commands
Status-viewing command
Job control commands
Job control commands
 Overall breakpoint commands
Auxiliary breakpoint commands
Overall breakpoint commands
 Breakpoint creation commands
Auxillary breakpoint commands
10 Breakpoint creation commands
 Breakpoint status commands
11 Overall breakpoint commands
 12 Global breakpoint commands
All-procedures breakpoint commands
Global breakpoint commands
Bp bpt bpx dp Dpt Dpx
 Assertion control commands
Record and playback commands
Macro facility commands
 13 Macro facility commands
Signal control commands
Miscellaneous commands
14 Signal control commands
 Format of the print command is different in XDB and GDB
16 Data format commands
XDB data formats and HP WDB equivalents
 Decimal integer
 17 Macro facility commands
XDB location syntax and HP WDB equivalents
XDB special language operators and HP WDB equivalents
 XDB special variables and HP WDB equivalents
18 Special language operators
19 Special variables
 16.8.1 a
Alphabetical lists of XDB commands and HP WDB equivalents
XDB variable identifiers and HP WDB equivalents
20 Variable Identifiers
 16.8.2 B
22 B
 Through D
23 C through D
 24 F through K
Through K
16.8.5 L
25 L
 Through P
26 M through P
 27 Q through S
Through S
16.8.8 T
28 T
 Through Z
29 U through Z
 Symbols
30 Symbols
 Any string
 Control-C # text
 280
 Setting Command History Feature in GDB
Setting the GDB Prompt
Setting Command Editing Options in GDB
Controlling GDB
 Exits. You can access this list through history
Control the settings
To fname. This is the file where GDB reads an
Expansion or through the history command
 Setting the GDB Screen Size
Supported Number Formats
 Optional warnings and messages
 Optional messages about internal happenings
Set confirm on
Show confirm Displays state of confirmation requests
 Show debug varobj
Object debugging info
 Canned Sequences of Commands
User-defined commands
 User-defined command hooks
 Command files
To add source directories or
 Commands for controlled output
 Expressions
Output formats
 292
 Using GDB under gnu Emacs
 Update display window accordingly
Calls, like the GDB next command. Then update the display
Execute to next instruction, using the GDB nexti command
GDB up command
 295
 296
 What is an annotation?
GDB Annotations
Server prefix
 When printing a structure, GDB annotates it as follows
Values
 When printing an array, GDB annotates it as follows
Frames
Frame annotation begins with
 Then comes
 Displays
Annotation for GDB input
 Errors
Information on breakpoints
 Invalidation notices
Running the program
 Displaying source
 Annotations We Might Want in the Future
Target-invalid
 306
 21.1 GDB/MI Command Syntax
GDB/MI Interface
 Done running connected error exit
21.1.2 GDB/MI Output syntax
Pragmatics
 Value Const tuple list String Tuple →
 Simple examples of GDB/MI interaction
Here is what happens if you pass a bad command
21.2 GDB/MI compatibility with CLI
Here is an example to evaluate an expression
 21.3.1 GDB/MI result records
21.4 GDB/MI command description format
21.3 GDB/MI output records
21.3.2 GDB/MI stream records
 21.5 GDB/MI breakpoint table commands
-break-after Command
 -break-condition command
Corresponding GDB command is condition
 Corresponding GDB command is delete
-break-delete command
-break-disable command
Corresponding GDB command is disable
 -break-enable command
-break-info Command
 -break-insert command
Result
 -break-list command
 -break-watch command
Corresponding GDB commands are watch, awatch, and rwatch
Setting a watchpoint on a variable in the main function
 Exec-continue running gdb
 -data-disassemble command
21.6 GDB/MI Data manipulation
 There is no direct mapping from this command to the CLI
Disassemble from the current value of $pc to $pc +
Disassemble 3 instructions from the start of main
 -data-evaluate-expression command
 Display a list of the registers that have changed
-data-list-changed-registers Command
-data-list-register-names command
On a PPC MBX board
 -data-list-register-values command
 -data-read-memory command
Space should be quoted using the C convention
To be read. Complex expressions containing embedded white
 Word-format Word-sizenr-rowsnr-cols aschar
 -display-delete command
-display-disable Command
 -display-list command
-display-enable command
-display-insert Command
-environment-cd command
 -environment-directory command
-environment-path command
 21.7 GDB/MI program control
-environment-pwd command
Corresponding GDB command is pwd
Show the current working directory
 -exec-abort command
-exec-arguments command
-exec-continue command
 Corresponding GDB command is finish
-exec-finish command
-exec-interrupt command
Corresponding GDB command is interrupt
 Corresponding GDB command is next
-exec-nextcommand Synopsis
-exec-next-instruction command
Corresponding GDB command is nexti
 Corresponding GDB command is return
-exec-return command
-exec-runcommand Synopsis
Corresponding GDB command is run
 -exec-show-arguments command
Example -exec-stepCommand Synopsis
 Corresponding GDB command is stepi
-exec-step-instruction command
-exec-until command
Regular stepping
 Corresponding GDB command is until
-file-exec-and-symbols command
-file-exec-file command
Corresponding GDB command is file
 -file-list-exec-sections command
-file-list-exec-source-files command
-file-list-shared-libraries command
 -file-symbol-file command
Miscellaneous GDB commands in GDB/MI
-file-list-symbol-files command
-gdb-exitcommand Synopsis
 -gdb-setcommand Synopsis
-gdb-showcommand Synopsis
-gdb-version command
 21.9 GDB/MI Stack Manipulation Commands
-stack-info-frame command
-stack-info-depth command
 -stack-list-arguments command Synopsis
For a stack with frame levels 0 through
 -stack-list-frames command
 Show frames between lowframe and highframe
Corresponding GDB commands are backtrace and where
Full stack backtrace
Show a single frame
 -stack-list-locals command
-stack-select-frame command
Info locals in GDB, gdbgetlocals in gdbtk
 -symbol-info-file command
21.10 GDB/MI Symbol query commands
-symbol-info-address command
-symbol-info-function command
 -symbol-list-functions command
-symbol-info-line command
-symbol-info-symbol command
-symbol-list-types command
 -symbol-list-variables command
-symbol-locate command
-symbol-type command
 -target-compare-sections command
21.11 GDB/MI Target Manipulation Commands
-target-attach command
-target-detach command
 Name of the section
-target-download command
Corresponding GDB command is load
At the end, a summary is printed
 -target-exec-status command
 -target-list-available-targets command
-target-list-current-targets command
-target-list-parameters command
 -thread-info command
21.12 GDB/MI thread commands
-target-select command
-thread-list-all-threads command
 -thread-list-ids command
-thread-select command
 21.13 GDB/MI tracepoint commands
Tracepoint commands are not yet implemented
21.14 GDB/MI variable objects
 -var-create command
GDB/MI Operations
Description and use of operations on variable objects
 -var-show-format command
-var-delete command
-var-set-format command
-var-info-num-children command
 -var-info-expression command
-var-list-children command
-var-info-type command
-var-show-attributes command
 -var-assign command
-var-update command
 360
 How to report bugs
Reporting Bugs in GDB
Have you found a bug?
 Reporting Bugs in GDB
 How to report bugs
 364
 Installing GDB
 Compiling GDB in another directory
Gdb-gdb-199991101/mmalloc
Package
 Specifying names for hosts and targets
 To use the source in the directory dirname. configure
Configure options
Separate directories. configure writes configuration
Srcdir= dirname
 Target=target
All available targets