[{"id":1782053,"web_url":"http://patchwork.ozlabs.org/comment/1782053/","msgid":"<8dbdd051-e288-fd2d-433b-a441a9e4e6bc@gmail.com>","list_archive_url":null,"date":"2017-10-07T09:27:32","subject":"Re: [Buildroot] [PATCH 3/8] toolchain/external-custom: hide\n\tversions too old for the current arch","submitter":{"id":67942,"url":"http://patchwork.ozlabs.org/api/people/67942/","name":"Romain Naour","email":"romain.naour@gmail.com"},"content":"Hi Yann, All\n\nLe 03/09/2017 à 11:44, Yann E. MORIN a écrit :\n> When an architecture expresses a requirement on the gcc version, limit\n> the version choice in the custom external toolchain.\n> \n> The ratioanle being that there is no point in offering that version to\n\nrationale\n\n> the user if we know before-hand that the gcc version will not work for\n> that architecture.\n> \n> All versions below the minimum we support is just made conditional to\n> that minimum as well, including the \"older\" entry.\n> \n> However, this means that the \"older\" entry is no longer available when\n> the architecture requires a minimum gcc version. A user who wants to use\n> a toolchain with a gcc older than the minimum will have no choice but to\n> realise the toolchain is not suitable (or lie and we would catch that\n\nrealize\n\n> when checking the gcc version anyway).\n> \n> Signed-off-by: \"Yann E. MORIN\" \n> Cc: Thomas Petazzoni \n> \n> ---\n> Note: this implies that it is no longer possible to use a custom\n> external toolchain in which a specific core has been back-ported\n> Thus, this patch may cause regressions in very specific and rare\n> corner cases. Do we want to support those cases? If yes, then we\n> should drop this patch.\n\nThis can be a problem for Linaro toolchains [1] where the GCC support for some\nnew cpu are backported. (Ok this example is moot since Buildroot doesn't support\nthese cpu).\n\nAlso since BR2_TOOLCHAIN_EXTERNAL_GCC_XXX is an user choice, we can print a\nwarning instead of completely disabling the gcc version ?\n\nBest regards,\nRomain\n\n[1] https://releases.linaro.org/components/toolchain/binaries/5.4-2017.05/\n\n> ---\n> .../toolchain-external-custom/Config.in.options | 15 +++++++++++++++\n> 1 file changed, 15 insertions(+)\n> \n> diff --git a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options\n> index ae343ddad5..eb7c30f171 100644\n> --- a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options\n> +++ b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options\n> @@ -18,6 +18,11 @@ config BR2_TOOLCHAIN_EXTERNAL_CUSTOM_PREFIX\n> \n> choice\n> \tbool \"External toolchain gcc version\"\n> +\tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_7 if BR2_ARCH_NEEDS_GCC_AT_LEAST_7\n> +\tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_6 if BR2_ARCH_NEEDS_GCC_AT_LEAST_6\n> +\tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_5 if BR2_ARCH_NEEDS_GCC_AT_LEAST_5\n> +\tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_4_9 if BR2_ARCH_NEEDS_GCC_AT_LEAST_4_9\n> +\tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_4_8 if BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> \tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_4_3\n> \thelp\n> \t Set to the gcc version that is used by your external\n> @@ -29,42 +34,52 @@ config BR2_TOOLCHAIN_EXTERNAL_GCC_7\n> \n> config BR2_TOOLCHAIN_EXTERNAL_GCC_6\n> \tbool \"6.x\"\n> +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_7\n> \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_6\n> \n> config BR2_TOOLCHAIN_EXTERNAL_GCC_5\n> \tbool \"5.x\"\n> +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_6\n> \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_5\n> \n> config BR2_TOOLCHAIN_EXTERNAL_GCC_4_9\n> \tbool \"4.9.x\"\n> +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_5\n> \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_9\n> \n> config BR2_TOOLCHAIN_EXTERNAL_GCC_4_8\n> \tbool \"4.8.x\"\n> +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_9\n> \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_8\n> \n> config BR2_TOOLCHAIN_EXTERNAL_GCC_4_7\n> \tbool \"4.7.x\"\n> +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_7\n> \n> config BR2_TOOLCHAIN_EXTERNAL_GCC_4_6\n> \tbool \"4.6.x\"\n> +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_6\n> \n> config BR2_TOOLCHAIN_EXTERNAL_GCC_4_5\n> \tbool \"4.5.x\"\n> +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_5\n> \n> config BR2_TOOLCHAIN_EXTERNAL_GCC_4_4\n> \tbool \"4.4.x\"\n> +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_4\n> \n> config BR2_TOOLCHAIN_EXTERNAL_GCC_4_3\n> \tbool \"4.3.x\"\n> +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_3\n> \n> config BR2_TOOLCHAIN_EXTERNAL_GCC_OLD\n> \tbool \"older\"\n> +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> \thelp\n> \t Use this option if your GCC version is older than any of the\n> \t above.\n>","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","buildroot@lists.busybox.net"],"Delivered-To":["patchwork-incoming@bilbo.ozlabs.org","buildroot@osuosl.org"],"Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=busybox.net\n\t(client-ip=140.211.166.138; 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MORIN\" , buildroot@buildroot.org","References":"\n\t","From":"Romain Naour ","Message-ID":"<8dbdd051-e288-fd2d-433b-a441a9e4e6bc@gmail.com>","Date":"Sat, 7 Oct 2017 11:27:32 +0200","User-Agent":"Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101\n\tThunderbird/52.3.0","MIME-Version":"1.0","In-Reply-To":"","Content-Language":"en-US","Cc":"Thomas Petazzoni ","Subject":"Re: [Buildroot] [PATCH 3/8] toolchain/external-custom: hide\n\tversions too old for the current arch","X-BeenThere":"buildroot@busybox.net","X-Mailman-Version":"2.1.18-1","Precedence":"list","List-Id":"Discussion and development of buildroot ","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"buildroot-bounces@busybox.net","Sender":"\"buildroot\" "}},{"id":1782091,"web_url":"http://patchwork.ozlabs.org/comment/1782091/","msgid":"<20171007122707.GI21901@scaer>","list_archive_url":null,"date":"2017-10-07T12:27:07","subject":"Re: [Buildroot] [PATCH 3/8] toolchain/external-custom: hide\n\tversions too old for the current arch","submitter":{"id":13903,"url":"http://patchwork.ozlabs.org/api/people/13903/","name":"Yann E. MORIN","email":"yann.morin.1998@free.fr"},"content":"Romain, All,\n\nOn 2017-10-07 11:27 +0200, Romain Naour spake thusly:\n> Le 03/09/2017 à 11:44, Yann E. MORIN a écrit :\n[--SNIP--]\n> > Note: this implies that it is no longer possible to use a custom\n> > external toolchain in which a specific core has been back-ported\n> > Thus, this patch may cause regressions in very specific and rare\n> > corner cases. Do we want to support those cases? If yes, then we\n> > should drop this patch.\n> \n> This can be a problem for Linaro toolchains [1] where the GCC support for some\n> new cpu are backported. (Ok this example is moot since Buildroot doesn't support\n> these cpu).\n\nOn the other hand, we could get a non-working configuration for other\nexternal toolchains.\n\nAnd that is not nice to let the user generate a configuration we know if\ninvalid.\n\n> Also since BR2_TOOLCHAIN_EXTERNAL_GCC_XXX is an user choice, we can print a\n> warning instead of completely disabling the gcc version ?\n\nI'll see if I can do something about that.\n\nRegards,\nYann E. MORIN.\n\n> Best regards,\n> Romain\n> \n> [1] https://releases.linaro.org/components/toolchain/binaries/5.4-2017.05/\n> \n> > ---\n> > .../toolchain-external-custom/Config.in.options | 15 +++++++++++++++\n> > 1 file changed, 15 insertions(+)\n> > \n> > diff --git a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options\n> > index ae343ddad5..eb7c30f171 100644\n> > --- a/toolchain/toolchain-external/toolchain-external-custom/Config.in.options\n> > +++ b/toolchain/toolchain-external/toolchain-external-custom/Config.in.options\n> > @@ -18,6 +18,11 @@ config BR2_TOOLCHAIN_EXTERNAL_CUSTOM_PREFIX\n> > \n> > choice\n> > \tbool \"External toolchain gcc version\"\n> > +\tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_7 if BR2_ARCH_NEEDS_GCC_AT_LEAST_7\n> > +\tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_6 if BR2_ARCH_NEEDS_GCC_AT_LEAST_6\n> > +\tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_5 if BR2_ARCH_NEEDS_GCC_AT_LEAST_5\n> > +\tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_4_9 if BR2_ARCH_NEEDS_GCC_AT_LEAST_4_9\n> > +\tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_4_8 if BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> > \tdefault BR2_TOOLCHAIN_EXTERNAL_GCC_4_3\n> > \thelp\n> > \t Set to the gcc version that is used by your external\n> > @@ -29,42 +34,52 @@ config BR2_TOOLCHAIN_EXTERNAL_GCC_7\n> > \n> > config BR2_TOOLCHAIN_EXTERNAL_GCC_6\n> > \tbool \"6.x\"\n> > +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_7\n> > \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_6\n> > \n> > config BR2_TOOLCHAIN_EXTERNAL_GCC_5\n> > \tbool \"5.x\"\n> > +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_6\n> > \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_5\n> > \n> > config BR2_TOOLCHAIN_EXTERNAL_GCC_4_9\n> > \tbool \"4.9.x\"\n> > +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_5\n> > \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_9\n> > \n> > config BR2_TOOLCHAIN_EXTERNAL_GCC_4_8\n> > \tbool \"4.8.x\"\n> > +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_9\n> > \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_8\n> > \n> > config BR2_TOOLCHAIN_EXTERNAL_GCC_4_7\n> > \tbool \"4.7.x\"\n> > +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> > \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_7\n> > \n> > config BR2_TOOLCHAIN_EXTERNAL_GCC_4_6\n> > \tbool \"4.6.x\"\n> > +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> > \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_6\n> > \n> > config BR2_TOOLCHAIN_EXTERNAL_GCC_4_5\n> > \tbool \"4.5.x\"\n> > +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> > \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_5\n> > \n> > config BR2_TOOLCHAIN_EXTERNAL_GCC_4_4\n> > \tbool \"4.4.x\"\n> > +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> > \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_4\n> > \n> > config BR2_TOOLCHAIN_EXTERNAL_GCC_4_3\n> > \tbool \"4.3.x\"\n> > +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> > \tselect BR2_TOOLCHAIN_GCC_AT_LEAST_4_3\n> > \n> > config BR2_TOOLCHAIN_EXTERNAL_GCC_OLD\n> > \tbool \"older\"\n> > +\tdepends on !BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8\n> > \thelp\n> > \t Use this option if your GCC version is older than any of the\n> > \t above.\n> > \n>","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","buildroot@lists.busybox.net"],"Delivered-To":["patchwork-incoming@bilbo.ozlabs.org","buildroot@osuosl.org"],"Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=busybox.net\n\t(client-ip=140.211.166.137; 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MORIN\" ","To":"Romain Naour ","Message-ID":"<20171007122707.GI21901@scaer>","References":"\n\t\n\t<8dbdd051-e288-fd2d-433b-a441a9e4e6bc@gmail.com>","MIME-Version":"1.0","Content-Disposition":"inline","In-Reply-To":"<8dbdd051-e288-fd2d-433b-a441a9e4e6bc@gmail.com>","User-Agent":"Mutt/1.5.22 (2013-10-16)","Cc":"Thomas Petazzoni ,\n\tbuildroot@buildroot.org","Subject":"Re: [Buildroot] [PATCH 3/8] toolchain/external-custom: hide\n\tversions too old for the current arch","X-BeenThere":"buildroot@busybox.net","X-Mailman-Version":"2.1.18-1","Precedence":"list","List-Id":"Discussion and development of buildroot ","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"buildroot-bounces@busybox.net","Sender":"\"buildroot\" "}}]