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commit: 618de7feba4b2063ee29bca02c413125022bf95d |
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Author: Sergei Trofimovich <slyfox <AT> gentoo <DOT> org> |
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AuthorDate: Thu Aug 20 22:34:52 2020 +0000 |
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Commit: Sergei Trofimovich <slyfox <AT> gentoo <DOT> org> |
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CommitDate: Thu Aug 20 22:48:53 2020 +0000 |
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URL: https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=618de7fe |
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|
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toolchain.eclass: always enable --with-long-double-128 for glibc targets |
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|
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Unless overridden glibc enables 128-bit 'long double' for |
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glibc 2.4 and above. But with crossdev change 7283a01 |
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("set --without-headers by default") we don't install any |
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headers for stage1-gcc. As a result gcc pessimistically |
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disables 128-bit 'long double'. |
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|
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The change enables --with-long-double-128 for glibc targets |
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for stage1-gcc. |
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|
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Reported-by: hanetzer <AT> startmail.com |
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Closes: https://bugs.gentoo.org/738248 |
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Signed-off-by: Sergei Trofimovich <slyfox <AT> gentoo.org> |
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|
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eclass/toolchain.eclass | 8 ++++++++ |
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1 file changed, 8 insertions(+) |
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|
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diff --git a/eclass/toolchain.eclass b/eclass/toolchain.eclass |
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index db02ee6be50..a3c948a9352 100644 |
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--- a/eclass/toolchain.eclass |
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+++ b/eclass/toolchain.eclass |
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@@ -912,6 +912,14 @@ toolchain_src_configure() { |
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--disable-threads |
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--without-headers |
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) |
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+ if [[ $needed_libc == glibc ]]; then |
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+ # By default gcc looks at glibc's headers |
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+ # to detect long double support. This does |
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+ # not work for --disable-headers mode. |
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+ # Any >=glibc-2.4 is good enough for float128. |
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+ # The option appeared in gcc-4.2. |
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+ confgcc+=( --with-long-double-128 ) |
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+ fi |
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elif has_version "${CATEGORY}/${needed_libc}[headers-only(-)]" ; then |
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confgcc+=( |
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"${confgcc_no_libc[@]}" |
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