Date: Sun, 01 Feb 2026 19:55:27 +0000 From: Dimitry Andric <dim@FreeBSD.org> To: ports-committers@FreeBSD.org, dev-commits-ports-all@FreeBSD.org, dev-commits-ports-main@FreeBSD.org Subject: git: ca0ca0a01359 - main - devel/build2: fix build with libc++ >= 20 Message-ID: <697fafaf.32a8e.eba7cca@gitrepo.freebsd.org>
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The branch main has been updated by dim: URL: https://cgit.FreeBSD.org/ports/commit/?id=ca0ca0a01359fe5acccf5a21c4acd2ceceefbd7a commit ca0ca0a01359fe5acccf5a21c4acd2ceceefbd7a Author: Dimitry Andric <dim@FreeBSD.org> AuthorDate: 2026-02-01 19:17:16 +0000 Commit: Dimitry Andric <dim@FreeBSD.org> CommitDate: 2026-02-01 19:54:59 +0000 devel/build2: fix build with libc++ >= 20 With libc++ 20 or higher devel/build2 fails to build, with errors similar to: In file included from libbuild2/utility.cxx:27: ./libbuild2/script/regex.hxx:620:10: error: 'make_unsigned' cannot be specialized: Users are not allowed to specialize this standard library entity [-Winvalid-specialization] 620 | struct make_unsigned<build2::script::regex::line_char> | ^ /usr/include/c++/v1/__type_traits/make_unsigned.h:75:8: note: marked '_Clang::no_specializations' here 75 | struct _LIBCPP_NO_SPECIALIZATIONS make_unsigned { | ^ /usr/include/c++/v1/__config:1167:9: note: expanded from macro '_LIBCPP_NO_SPECIALIZATIONS' Upstream committed a fix for this in https://github.com/build2/build2/commit/7cf9cec, so add that as a patch file. PR: 292867 Approved by: fuz (maintainer) MFH: 2026Q1 --- .../files/patch-build2_libbuild2_script_regex.hxx | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/devel/build2/files/patch-build2_libbuild2_script_regex.hxx b/devel/build2/files/patch-build2_libbuild2_script_regex.hxx new file mode 100644 index 000000000000..11abe3d274c0 --- /dev/null +++ b/devel/build2/files/patch-build2_libbuild2_script_regex.hxx @@ -0,0 +1,19 @@ +--- build2/libbuild2/script/regex.hxx.orig 2022-12-16 05:41:50 UTC ++++ build2/libbuild2/script/regex.hxx +@@ -616,11 +616,16 @@ namespace std + // to use as an index in some internal cache regardless if the cache is used + // for this specialization (and the cache is used only if CharT is char). + // ++ // Note that starting with libc++ 20 we get -Winvalid-specialization for ++ // this specialization. But luckily it doesn't seem to be necessary. ++ // ++#if !defined(_LIBCPP_VERSION) || _LIBCPP_VERSION < 20000 + template <> + struct make_unsigned<build2::script::regex::line_char> + { + using type = build2::script::regex::line_char; + }; ++#endif + + // When used with libc++ the linker complains that it can't find + // __match_any_but_newline<line_char>::__exec() function. The problem ishome | help
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