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yann@402
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1 |
When configuring a s390->s390 or cris->cris crosscompiler
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yann@402
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2 |
(ok, I haven't hit this yet, but one of these days I'll get me an account
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yann@402
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on an s390, and then I'll need this patch :-), you'll get the
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yann@402
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4 |
following error:
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yann@402
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5 |
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yann@402
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+ /build/s390-unknown-linux-gnu/gcc-3.3-glibc-2.3.2/gcc-3.3/configure
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yann@402
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--target=s390-unknown-linux-gnu --host=s390-host_unknown-linux-gnu
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yann@402
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--prefix=/result/s390-unknown-linux-gnu/gcc-3.3-glibc-2.3.2
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yann@402
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--enable-languages=c
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yann@402
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--with-local-prefix=/result/s390-unknown-linux-gnu/gcc-3.3-glibc-2.3.2/s390-
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yann@402
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11 |
unknown-linux-gnu --enable-threads=no --without-headers --with-newlib
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yann@402
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--disable-shared
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yann@402
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13 |
...
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yann@402
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14 |
*** --with-headers is only supported when cross compiling
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yann@402
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15 |
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yann@402
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16 |
This error pops up only when you're using Daniel Jacobowitz's technique
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yann@402
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of slightly changing the target and host tuples to make them different
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yann@402
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enough to force gcc's build system to not try to pull in system libraries
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yann@402
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or headers. This technique is needed e.g. to build an x86 -> x86
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yann@402
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cross-compiler.
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yann@402
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(The LFS developers ran into the same bug that prompted me to use
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yann@402
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this technique; they point people who run into it to
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yann@402
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http://linuxfromscratch.org/~greg/pure_lfs.txt, which is a different
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yann@402
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way of avoiding this problem. I think the tuple tweak is the way to go, though.)
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yann@402
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25 |
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yann@402
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26 |
config-patches@gnu.org rejected this patch, on the grounds that there
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yann@402
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is only one vendor of each of those two architectures, so the
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yann@402
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canonicalization is by definition correct. When I pointed out the
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yann@402
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29 |
difficulty this causes for people building s390 -> s390 or
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yann@402
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30 |
cris -> cris compilers that are incompatible with the system
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yann@402
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libraries and thus must be built like cross-compilers, he grumped and said
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yann@402
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"autoconf should let you specify a cross-compiler in some other way than
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yann@402
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33 |
comparing tuple strings".
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yann@402
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34 |
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yann@402
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35 |
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yann@402
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36 |
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yann@402
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37 |
--- gcc-3.3/config.sub.old Sun Jun 8 20:38:47 2003
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yann@402
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+++ gcc-3.3/config.sub Sun Jun 8 20:40:34 2003
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yann@402
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39 |
@@ -433,9 +433,12 @@
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yann@402
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40 |
crds | unos)
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yann@402
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41 |
basic_machine=m68k-crds
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yann@402
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;;
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yann@402
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43 |
- cris | cris-* | etrax*)
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yann@402
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+ cris | etrax*)
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yann@402
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basic_machine=cris-axis
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yann@402
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;;
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yann@402
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47 |
+ cris-*)
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yann@402
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48 |
+ basic_machine=cris-`echo $basic_machine | sed 's/^[^-]*-//'`
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yann@402
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+ ;;
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yann@402
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50 |
da30 | da30-*)
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yann@402
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basic_machine=m68k-da30
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yann@402
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;;
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yann@402
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@@ -820,11 +823,17 @@
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yann@402
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rtpc | rtpc-*)
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yann@402
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basic_machine=romp-ibm
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yann@402
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;;
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yann@402
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- s390 | s390-*)
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yann@402
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58 |
+ s390)
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yann@402
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basic_machine=s390-ibm
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yann@402
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;;
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yann@402
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- s390x | s390x-*)
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yann@402
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+ s390-*)
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yann@402
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+ basic_machine=s390-`echo $basic_machine | sed 's/^[^-]*-//'`
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yann@402
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+ ;;
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yann@402
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+ s390x)
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yann@402
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basic_machine=s390x-ibm
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yann@402
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+ ;;
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yann@402
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+ s390x-*)
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yann@402
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+ basic_machine=s390x-`echo $basic_machine | sed 's/^[^-]*-//'`
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yann@402
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;;
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yann@402
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sa29200)
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yann@402
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basic_machine=a29k-amd
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