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Ed W wrote: |
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> Gordon Malm wrote: |
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>> Hello Hardened users, this is just a quick heads up. GCC 4.3.4 will |
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>> be going stable on hardened profiles shortly. Unlike Hardened GCC |
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>> 3.4.6, this version lacks default SSP building. However, |
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>> FORTIFY_SOURCE=2 and -fno-strict-overflow are now enabled by |
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>> default. Other Hardened compiler features (ex. default relro, bind |
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>> now & pic/pie building) remain enabled - no change from 3.4.6. |
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>> |
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>> It is regretable this must be done before GCC4 is SSP-by-default |
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>> enabled. However, more and more packages require the newer GCC. The |
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>> stable GCC on Hardened has been GCC 3.4.6 for a long time, but this |
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>> has become an untenable situation. GCC4 SSP-by-default works and |
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>> will be added in a later revision - some GCC4+SSP bugs in grub and |
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>> glibc also remain to be fixed. |
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>> |
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>> |
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> |
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> Anyone got any empirical reports on upgrading a uclibc hardened |
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> system? Lack of TLS in uclibc appears to be a potential issue? |
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> |
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> Natanael Copa has previously reported very widespread success using |
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> gcc 4.4.1 + uclibc with apparently fairly minimal additional patches? |
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> I guess gcc 4.4 isn't yet stable on any profiles, but does gcc4.4 buy |
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> us anything generally in terms of getting hardened+ssp stable? |
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> |
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> Cheers |
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> |
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> Ed W |
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|
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Yesterday I tried compiling gcc-4.3.2-r3 on a stock gentoo hardened |
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uclibc system (uclibc-0.9.28.3-r7) and hit all the bugs I remembered |
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hitting when I was helping Magnus with testing gcc-4* on uclibc. (Like |
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the fenv.h issue). |
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|
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The best success I've had is using the toolchain from the hardened-dev |
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overlay. This includes upgrading both gcc and uclibc: gcc-4.4.1-r2, |
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uclibc-0.9.30.1-r1, binutils-2.18-r3. I can emerge -e world with only |
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two issue, sandbox and python. Take a look at bug 275094 for some clues |
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on how to deal with python. I haven't really tackled sandbox yet. |
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|
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Hope this helps. |
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|
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-- |
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|
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Anthony G. Basile, Ph.D. |
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Chair of Information Technology |
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D'Youville College |
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Buffalo, NY 14201 |
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USA |
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|
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(716) 829-8197 |
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