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Re: [PATCH 4 of 7] cc/gcc: Add support for getting a gcc snapshot


On Thu, Dec 9, 2010 at 2:06 PM, Yann E. MORIN
<yann.morin.1998@anciens.enib.fr> wrote:
> Bryan, All,
>
> On Tuesday 07 December 2010 10:06:57 Bryan Hundven wrote:
>> # HG changeset patch
>> # User Bryan Hundven <bryanhundven@gmail.com>
>> # Date 1291712194 28800
>> # Node ID 8f7cc140fe23d204d2d1915fb3f496f4eef9a7c6
>> # Parent Â73795525c82eaa7f4561f358c70d26ef9d72a446
>> cc/gcc: Add support for getting a gcc snapshot
>>
>> diff -r 73795525c82e -r 8f7cc140fe23 config/cc.in
>> --- a/config/cc.in  ÂMon Dec 06 22:42:07 2010 -0800
>> +++ b/config/cc.in  ÂTue Dec 07 00:56:34 2010 -0800
>> @@ -8,6 +8,9 @@
>> Âconfig CC_VERSION
>> Â Â Âstring
>>
>> +config CC_SNAPSHOT
>> + Â Âstring
>> +
>> Âsource "config.gen/cc.in"
>>
>> Âconfig CC_SUPPORT_CXX
>> diff -r 73795525c82e -r 8f7cc140fe23 config/cc/gcc.in
>> --- a/config/cc/gcc.in    ÂMon Dec 06 22:42:07 2010 -0800
>> +++ b/config/cc/gcc.in    ÂTue Dec 07 00:56:34 2010 -0800
>> @@ -19,6 +19,30 @@
>> Â# Don't remove next line
>> Â# CT_INSERT_VERSION_BELOW
>>
>> +config CC_V_4_6_SNAPSHOT
>> + Â Âbool
>> + Â Âprompt "4.6 Snapshot (EXPERIMENTAL)"
>> + Â Âdepends on EXPERIMENTAL
>> + Â Âselect CC_GCC_4_6_or_later
>> +
>> +config CC_V_4_5_SNAPSHOT
>> + Â Âbool
>> + Â Âprompt "4.5 Snapshot (EXPERIMENTAL)"
>> + Â Âdepends on EXPERIMENTAL
>> + Â Âselect CC_GCC_4_5_or_later
>> +
>> +config CC_V_4_4_SNAPSHOT
>> + Â Âbool
>> + Â Âprompt "4.4 Snapshot (EXPERIMENTAL)"
>> + Â Âdepends on EXPERIMENTAL
>> + Â Âselect CC_GCC_4_4_or_later
>> +
>> +config CC_V_4_3_SNAPSHOT
>> + Â Âbool
>> + Â Âprompt "4.3 Snapshot (EXPERIMENTAL)"
>> + Â Âdepends on EXPERIMENTAL
>> + Â Âselect CC_GCC_4_3_or_later
>> +
>
> I'd rather have the 4.x snapshots be beside the corresponding 4.x.y
> stable versions, eg:
> Â4.6-snapshot
> Â4.5-snapshot
> Â4.5.1
> Â4.5.0
> Â4.4-snapshot
> Â4.4.5
> Â4.4.4
> Â...
> Â4.3-snapshot
> Â4.3.5
> Â...

Sure! Makes sense to me. I think Arnaud's version of the patch did the same.

>> Âconfig CC_V_4_5_1
>> Â Â Âbool
>> Â Â Âprompt "4.5.1 (EXPERIMENTAL)"
>> @@ -154,6 +178,11 @@
>> Â Â Âselect CC_GCC_USE_MPC
>> Â Â Âselect CC_GCC_HAS_LTO
>>
>> +config CC_GCC_4_6_or_later
>> + Â Âbool
>> + Â Âdefault n
>> + Â Âselect CC_GCC_4_5_or_later
>> +
>> Âconfig CC_GCC_HAS_GRAPHITE
>> Â Â Âbool
>> Â Â Âdefault n
>> @@ -188,6 +217,10 @@
>> Â Â Âstring
>> Â# Don't remove next line
>> Â# CT_INSERT_VERSION_STRING_BELOW
>> + Â Âdefault "4.6-" if CC_V_4_6_SNAPSHOT
>> + Â Âdefault "4.5-" if CC_V_4_5_SNAPSHOT
>> + Â Âdefault "4.4-" if CC_V_4_4_SNAPSHOT
>> + Â Âdefault "4.3-" if CC_V_4_3_SNAPSHOT
>> Â Â Âdefault "4.5.1" if CC_V_4_5_1
>> Â Â Âdefault "4.5.0" if CC_V_4_5_0
>> Â Â Âdefault "4.4.5" if CC_V_4_4_5
>
> Ditto.

ack.

>> @@ -217,6 +250,15 @@
>> Â Â Âdepends on CC_LANG_JAVA
>> Â Â Âdepends on CC_GCC_4_3_or_later
>>
>> +config CC_SNAPSHOT
>> + Â Âstring
>> + Â Âprompt "gcc snapshot date"
>> + Â Âdepends on CC_V_4_6_SNAPSHOT || CC_V_4_5_SNAPSHOT || CC_V_4_4_SNAPSHOT || CC_V_4_3_SNAPSHOT
>> + Â Âdefault ""
>> + Â Âhelp
>> + Â Â Check ftp://gcc.gnu.org/pub/gcc/snapshots/ for the latest snapshot.
>> + Â Â The string to enter should be just the 'YYYYMMDD' date of the snapshot.
>> +
>
> How long are the snapshots kept on there? It looks like only for about
> 6-8 months. Which means that starting again with the same .config would
> make the toolchain no longer buildable after that period of time has
> elapsed.
>
> This should probably not be an issue, as using a toolchain based on a
> snapshot for production would be highly dubious. But once the option
> is here, people will start using it, forget about it, and ship their
> snapshot-toolchain to the outter world. Which means they'll be screwed
> if they have to fix it later.
>
> So, I would like you add a BIG FAT WARNING roughly saying:
>
> ÂBIG FAT WARNING ! You are using a snapshot, there is no guarantee that
> Âthe toolchain will properly work, or even build. You might even not be
> Âable to reproduce it later, if the upstream snapshot eventually disapears
> Â(and they have a tendency to disapear after a not-so-long period).
>
> ÂSo, it is HIGHLY advised:
> Â- that you think twice before you keep using a snapshot, and if so:
> Â- that you save the snapshot tarball by your own means in a safe place.
>
> Roughly that. I leave it to you to rephrase it, if you want. :-)

I totally agree.
Maybe besides having EXPERIMENTAL, we should have SNAPSHOT or DEVELOPER.
And these options would have the "BIG FAT WARNING". What do you think?

>> Âconfig CC_PKGVERSION
>> Â Â Âstring
>> Â Â Âprompt "gcc ID string"
>> diff -r 73795525c82e -r 8f7cc140fe23 scripts/build/internals.sh
>> --- a/scripts/build/internals.sh   ÂMon Dec 06 22:42:07 2010 -0800
>> +++ b/scripts/build/internals.sh   ÂTue Dec 07 00:56:34 2010 -0800
>> @@ -20,12 +20,12 @@
>> Â Â Â Â Âesac
>> Â Â Â Â ÂCT_DoLog INFO "Stripping all toolchain executables"
>> Â Â Â Â ÂCT_Pushd "${CT_PREFIX_DIR}"
>> - Â Â Â Âfor t in ar as c++ c++filt cpp dlltool dllwrap g++ gcc gcc-${CT_CC_VERSION} gcov gprof ld nm objcopy objdump ranlib readelf size strings strip addr2line windmc windres; do
>> + Â Â Â Âfor t in ar as c++ c++filt cpp dlltool dllwrap g++ gcc gcc-${CT_CC_REAL_VERSION} gcov gprof ld nm objcopy objdump ranlib readelf size strings strip addr2line windmc windres; do
>> Â Â Â Â Â Â Â[ -x bin/${CT_TARGET}-${t}${CT_HOST_SUFFIX} ] && ${CT_HOST}-strip ${strip_args} bin/${CT_TARGET}-${t}${CT_HOST_SUFFIX}
>> Â Â Â Â Â Â Â[ -x ${CT_TARGET}/bin/${t}${CT_HOST_SUFFIX} ] && ${CT_HOST}-strip ${strip_args} ${CT_TARGET}/bin/${t}${CT_HOST_SUFFIX}
>> Â Â Â Â Âdone
>> Â Â Â Â ÂCT_Popd
>> - Â Â Â ÂCT_Pushd "${CT_PREFIX_DIR}/libexec/gcc/${CT_TARGET}/${CT_CC_VERSION}"
>> + Â Â Â ÂCT_Pushd "${CT_PREFIX_DIR}/libexec/gcc/${CT_TARGET}/${CT_CC_REAL_VERSION}"
>> Â Â Â Â Âfor t in cc1 cc1plus collect2; do
>> Â Â Â Â Â Â Â[ -x ${t}${CT_HOST_SUFFIX} ] && ${CT_HOST}-strip ${strip_args} ${t}${CT_HOST_SUFFIX}
>> Â Â Â Â Âdone
>
> This will no longer apply, I've reworked that stuff in my tree, as some
> stuff was missing in there. I'll push that a bit later in the week, sorry
> for that... :-/

Go, go gadget mq. I'll "hg qpop -a && hg pull -u", fix the other
problems, and re-post.

>> diff -r 73795525c82e -r 8f7cc140fe23 scripts/crosstool-NG.sh.in
>> --- a/scripts/crosstool-NG.sh.in   ÂMon Dec 06 22:42:07 2010 -0800
>> +++ b/scripts/crosstool-NG.sh.in   ÂTue Dec 07 00:56:34 2010 -0800
>> @@ -151,6 +151,16 @@
>> ÂCT_CC_CORE_EXTRA_CONFIG="${CT_ARCH_CC_CORE_EXTRA_CONFIG} ${CT_CC_CORE_EXTRA_CONFIG}"
>> ÂCT_CC_EXTRA_CONFIG="${CT_ARCH_CC_EXTRA_CONFIG} ${CT_CC_EXTRA_CONFIG}"
>>
>> +# If we are using a gcc snapshot, get the real "version number" straight
>> +# here so we don't have to modify the build scripts.
>> +if [ "${CT_CC_V_4_5_SNAPSHOT}" = "y" -o "${CT_CC_V_4_6_SNAPSHOT}" = "y" ]; then
>> + Â Âif [ -n "${CT_CC_SNAPSHOT}" ]; then
>> + Â Â Â ÂCT_CC_VERSION="${CT_CC_VERSION}${CT_CC_SNAPSHOT}"
>> + Â Âelse
>> + Â Â Â ÂCT_Abort "You forgot to set the gcc snapshot date!"
>> + Â Âfi
>> +fi
>
> This should go to the gcc.sh script. I know you needed it to be globally
> available for the strip phase above, but that will no longer be needed.

ack.

>> Â# Compute the working directories names
>> ÂCT_TARBALLS_DIR="${CT_WORK_DIR}/tarballs"
>> ÂCT_SRC_DIR="${CT_WORK_DIR}/src"
>> @@ -572,6 +582,11 @@
>> Â Â Âfi
>> Âfi
>>
>> +# When referencing the real gcc version, and not the (possibly) snapshot
>> +# version, use ${CT_CC_REAL_VERSION} instead of the (possibly) snapshot
>> +# version.
>> +CT_CC_REAL_VERSION=$(cat ${CT_SRC_DIR}/gcc-${CT_CC_VERSION}/gcc/BASE-VER)
>> +
>> Â# Now for the job by itself. Go have a coffee!
>> Âif [ "${CT_ONLY_DOWNLOAD}" != "y" -a "${CT_ONLY_EXTRACT}" != "y" ]; then
>> Â Â Â# Because of CT_RESTART, this becomes quite complex
>
> Ditto.

ack.

> Regards,
> Yann E. MORIN.
>
> --
> .-----------------.--------------------.------------------.--------------------.
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>
>
>


-Bryan

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