From edc0757c56090364e0a95aabfa9f645a16a27569 Mon Sep 17 00:00:00 2001
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From: Peter Korsgaard <peter@korsgaard.com>
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Date: Fri, 2 Aug 2019 15:53:16 +0200
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Subject: [PATCH] configure.ac: fixup $CC --print-multiarch output for
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musl/uclibc GCC 8+ toolchains
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GCC commit 6834b83784dcf0364eb820e8 (multiarch support for non-glibc linux
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systems), which is part of GCC 8+, changed the multiarch logic to use
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$arch-linux-musl / $arch-linux-uclibc rather than $arch-linux-gnu.
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This then causes the python3 configure script to error out:
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checking for the platform triplet based on compiler characteristics... powerpc-linux-gnu
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configure: error: internal configure error for the platform triplet, please file a bug report
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http://autobuild.buildroot.net/results/cb4/cb49c539501342e45cbe5ade82e588fcdf51f05b
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As it requires that the --print-multiarch output (if not empty) matches the
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deduced triplet (which always uses -linux-gnu).
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It isn't quite clear why --print-multiarch returns something for a
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non-multiarch toolchain on some architectures (E.G. PowerPC), but as a
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workaround, rewrite the --print-multiarch output to match older GCC versions
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to keep the configure script happy.
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Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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---
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configure.ac | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/configure.ac b/configure.ac
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index 615c16aced..241298e6cf 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -727,7 +727,9 @@ then
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fi
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-MULTIARCH=$($CC --print-multiarch 2>/dev/null)
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+# GCC 8+ returns $arch-linux-{musl,uclibc} for musl/uClibc based
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+# toolchains confusing python. Fix that up
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+MULTIARCH=$($CC --print-multiarch 2>/dev/null | sed -E 's/-linux-(musl|uclibc)*$/-linux-gnu/')
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AC_SUBST(MULTIARCH)
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AC_MSG_CHECKING([for the platform triplet based on compiler characteristics])
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--
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2.25.1
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