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We now distribute a -win32-x86-symbols.zip file containing the precise debugging symbols corresponding to each released binary distribution. For the typical user, there is no need to download these archives.
From the primary download and mirrors you can obtain the corresponding -win32-x86-symbols.zip files for all of the current binary distributions. To help track down a crash in an older version of Apache HTTP Server, you will need to refer back to the correspond version from our archive historical download site.
In order to use these -symbol.zip archives, they must be unzipped (with the appropriate -dir or 'create directories' flag) into the installed Apache directory, or debugging tools such as windbg must be configured to search the directory where these .pdb files are extracted to.
These -symbols.zip packages contain the .pdb diagnostic symbol files (which correpsond to the distributed binary release) and can be used by nearly all modern Win32 debugging tools, including the freely available WinDbg utility. They are most useful for the core developers to review crash dumps generated by Dr. Watson if Apache experiences a General Protection Fault. They also provide additional backtrace details in Dr. Watson crash log files, if they are installed into the Apache directory which is experiencing General Protection Fault or other crash issues.
It is important to note that the .zip must correspond to the distribution you are diagnosing, and you must have the correpsonding source tree to perform any diagostics at the source level. A fully built source tree is required for all of the 'intermediate' .c and .h source files created during the build process (see the Apache 2.2 compiling instructions). In order to diagnose bugs, obtain the sources and symbols archive corresponding to older releases from our historical archive of releases.
If you don't understand a word of this, and a developer did not personally ask you to install them to help troubleshoot a problem, please trust that you do not need these files to install or run Apache. The .msi runtime is the only file you need to install, and the -win32-src.zip is the only file you need to compile your own Apache HTTP Server.