Date: Sun, 09 Aug 2026 09:07:40 +0000 From: Piotr Kubaj <pkubaj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 185a03ad8aa8 - main - libgcc_s: export the IEEE-128 long double runtime on powerpc64le Message-ID: <6a78435c.26b4c.125c331d@gitrepo.freebsd.org>
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The branch main has been updated by pkubaj: URL: https://cgit.FreeBSD.org/src/commit/?id=185a03ad8aa84baf6c644688fc7687d2a3ebf1c5 commit 185a03ad8aa84baf6c644688fc7687d2a3ebf1c5 Author: Piotr Kubaj <pkubaj@FreeBSD.org> AuthorDate: 2026-08-09 09:02:40 +0000 Commit: Piotr Kubaj <pkubaj@FreeBSD.org> CommitDate: 2026-08-09 09:07:30 +0000 libgcc_s: export the IEEE-128 long double runtime on powerpc64le On powerpc64le with IEEE-128 long double, the long-double compiler-runtime helpers are the *kf* soft-float functions (built from the tf sources, renamed via -D in lib/libcompiler_rt/Makefile.inc) plus the complex multc3/__divtc3. They are compiled into libgcc_s.so by the powerpc64le SRCF block, but were never added to Symbol.map, so they stayed local and unexported. Every other IEEE-128 architecture already exports its scalar long-double runtime -- aarch64 and riscv list the tf helpers in GCC_4.6.0. powerpc64le was simply missed. Because the helpers are unexported, any clang-built shared library that uses long double leaves them undefined (permitted in a DSO), and linking an executable against that DSO then fails under lld's default --no-allow-shlib-undefined. For example science/harminv fails to link its binary against its own libharminv.so with undefined multc3/divtc3; at -O0, mulkf3/addkf3/__subkf3/__unordkf2 appear as well. Export the full runtime, gated on the PowerPC-specific LONG_DOUBLE_IEEE128 predefine so no other architecture is affected: complex multc3/divtc3 in GCC_4.0.0 (beside the other complex mul*c3), and the 28 scalar *kf* functions in GCC_7.0.0. Node placement follows glibc/gcc symbol-versioning history. Differential Revision: https://reviews.freebsd.org/D58248 --- lib/libgcc_s/Symbol.map | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/lib/libgcc_s/Symbol.map b/lib/libgcc_s/Symbol.map index 91fdeac3f2cf..ba656383bd5c 100644 --- a/lib/libgcc_s/Symbol.map +++ b/lib/libgcc_s/Symbol.map @@ -161,6 +161,10 @@ GCC_4.0.0 { __mulsc3; #if defined(__amd64__) || defined(__i386__) __mulxc3; +#endif +#if defined(__LONG_DOUBLE_IEEE128__) + __divtc3; + __multc3; #endif __powidf2; __powisf2; @@ -233,4 +237,34 @@ GCC_7.0.0 { #ifdef __i386__ __divmoddi4; #endif +#if defined(__LONG_DOUBLE_IEEE128__) + __addkf3; + __subkf3; + __mulkf3; + __divkf3; + __eqkf2; + __gekf2; + __gtkf2; + __lekf2; + __ltkf2; + __nekf2; + __unordkf2; + __extendsfkf2; + __extenddfkf2; + __trunckfsf2; + __trunckfdf2; + __fixkfsi; + __fixkfdi; + __fixkfti; + __fixunskfsi; + __fixunskfdi; + __fixunskfti; + __floatsikf; + __floatdikf; + __floattikf; + __floatunsikf; + __floatundikf; + __floatuntikf; + __powikf2; +#endif };home | help
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