Hi all, At first I would like to tell my sad story: I'm working on some strange math problem and want to use GCC to compile MATLAB MEX files. Unfortunately, MATLAB rejects recent GCC but accepts GCC-4.7. So I checkouted GCC-4.7.4, compiled it with program-suffix=-4.7. I thought with this suffix, I can install it without damage my system (only thing has to be done is recreate libstdc++.so link to libstdc++.so.6.0.23). At first it seems OK, but after I put down the math thing and gone to hack GCC code, I found out I can't compile GCC anymore... Then I noticed -static-libstdc++ in GCC Makefile and realized my libstdc++.a had been replaced by libstdc++ 6.0.17. At last I had to use GCC-4.7 to bootstrap GCC trunk version again. I know I've made a serious mistake to install ancient GCC with only a program suffix (w/o a different prefix). Then I have an idea to install libstdc++.a to $prefix/lib/gcc/$arch/$version so that each GCC version would be able to use its own static libstdc++ and no version would be broke with -static-libstdc++. My question is: is this really a good idea or I'm making serious mistakes again? -- Xi Ruoyao <ryxi@xxxxxxxxxxxxxxxxx> School of Aerospace Science and Technology, Xidian University
