From d068fb0caae8c8db97ee59ba400929f5f97f8be1 Mon Sep 17 00:00:00 2001 Message-Id: From: Christoph Erhardt Date: Tue, 22 Feb 2022 21:21:18 +0100 Subject: [PATCH] Fix compatibility with libstdc++ < 9 mimalloc does not override the `nothrow` variants of the `delete` operator because it assumes that their implementation in libstdc++ redirects to the default `delete` operators. This is not the case for libstdc++ < 9, where `std::free()` is called directly. Upstream bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68210 This patch ensures that the `nothrow` `delete` operators are overridden as well. --- main.cc | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/main.cc b/main.cc index b390b0f7..5c1f5450 100644 --- a/main.cc +++ b/main.cc @@ -6,6 +6,13 @@ #ifdef USE_SYSTEM_MIMALLOC #include + +// Additionally override the nothrow delete operators for compatibility with +// buggy libstdc++ < 9 +#if MI_MALLOC_VERSION < 206 +void operator delete(void* p, const std::nothrow_t&) noexcept { mi_free(p); } +void operator delete[](void* p, const std::nothrow_t&) noexcept { mi_free(p); } +#endif #endif namespace mold { -- 2.35.1