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It occurred to me that I should submit this patch now, especially since I see evidence of others (like 'Crinkelite') compiling TDM under Linux. Based on replies to my post in my other recent thread, I realize that it has no chance for 2.05 inclusion, but I want others to have access to it now, so I'm asking that it be added to latest SVN, please. Problem/Fix Description: There is some sort of anomaly with the SCons build system (which is used only for Linux builds, not Windows builds) whereby all items get needlessly rebuilt, every time, when doing TDM builds. In fact, this was encountered by 'NagaHuntress' back in this Aug 2015 post. But, for this and various other reasons while investigating a 64-bit Linux build, she chose to completely switch from SCons to CMake, conveniently side-stepping the problem. The issue fixed by my patch has to do with the SCons (MD5) 'signature' file, which is used to decide when input files used in the build have changed. It's not 100% clear what the cause is, but it may be due to the use of the 'VariantDir()' directives in the 'SConstruct' file. Regardless of the reason, credit for the solution comes from Victor Gaydov's webpage: Both Doom3 and, therefore, TDM use a method of specifying the SCons signature file which causes this serious problem. The solution is quite simple, just as Victor stated: specify the signature file using a full path. The attached patch provides this improvement. It was tested under 32-bit Slackware 13.1 running SCons version 2.5.1 and under 32-bit Slackware 14.2 running SCons version 2.4.1, both against latest SVN (6720) and against the TDM 2.04 release. The fix means that now when you're building TDM under Linux, SCons won't (annoyingly!) rebuild the whole tree every time. This change also nicely allows the removal of a hack in the Linux build script file which was used to force the existence of a SCons signature file. Prior to this patch, if SCons was run without a signature file of the expected name already existing, it would report a long error message that began with this: OSError: [Errno 2] No such file or directory: 'scons.signatures.dblite':And, worse, it would fail to create the proper signature file ('scons.signatures.dblite'), instead creating an unwanted 'scons.signatures.tmp' file, and thereby causing ongoing grief with every successive run of SCons. This simple patch fixes both problems while also removing the inelegant work-around in the Linux build script file. Please apply to latest SVN. prevent-scons-from-rebuilding-everything-every-time.patch.txt