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Previously this was used only for linking the samples, which ensured that they found the libraries directly referenced by them, but this wasn't enough to find the libraries referenced indirectly, via another library (e.g. wxxml used by wxxrc internally but not necessarily referenced by the sample using XRC) because DT_RUNPATH is not used in this case, as documented in Linux ld.so(8). Ensure that such libraries are found nevertheless by setting runpath for all the libraries too. Note that it would probably be more logical to just get rid of SAMPLES_RPATH_FLAG and use DYLIB_RPATH_FLAG everywhere, but this would result in a ton of changes, so keep the old variable for now and just set it to the same value to avoid this and keep the possibility to change it to a different value if necessary later.
autogen.mk autogen.mk is a makefile provided to automatically update the GNU autotools build system. It will run Bakefile, aclocal, and autoconf as appropriate. The .m4 files required for running aclocal are located in build/aclocal. When upgrading software that wxWidgets depends on (for example, Bakefile, cppunit, GTK, SDL, or others) it is advisable to upgrade the .m4 files located in the build/aclocal directory. It is particularly important that if you use a newer version of Bakefile to generate the Makefile.in files that you use the newer bakefile*.m4. Because build/autogen.mk is a Makefile it will automatically rerun aclocal and autoconf as necessary whenever any m4 in build/aclocal is newer than the generated aclocal.m4. You can achieve this simply by copying the new bakefile*.m4 files from PREFIX/share/aclocal/ into the build/aclocal/ directory and rerunning make -f build/autogen.mk. Note that you should _not_ preserve source file times (don't use cp -p) or else it's possible your .m4 files will be older than the generated aclocal.m4). Example: cp /usr/share/aclocal/bakefile*.m4 build/aclocal/ make -f build/autogen.mk Please don't forget to commit updated .m4 files as well as updated aclocal.m4, configure, and Makefile.in files to wxWidgets.