[Bug 292108] devel/llvm12: fix build with clang 21
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Date: Thu, 01 Jan 2026 20:52:03 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292108
Bug ID: 292108
Summary: devel/llvm12: fix build with clang 21
Product: Ports & Packages
Version: Latest
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: Individual Port(s)
Assignee: brooks@FreeBSD.org
Reporter: dim@FreeBSD.org
Assignee: brooks@FreeBSD.org
Flags: maintainer-feedback?(brooks@FreeBSD.org)
Recent versions of clang complain about explicit copy constructors,
leading to errors similar to:
In file included from
/wrkdirs/usr/ports/devel/llvm12/work/llvm-project-12.0.1.src/llvm/tools/sancov/sancov.cpp:16:
In file included from
/wrkdirs/usr/ports/devel/llvm12/work/llvm-project-12.0.1.src/llvm/include/llvm/MC/MCContext.h:12:
/wrkdirs/usr/ports/devel/llvm12/work/llvm-project-12.0.1.src/llvm/include/llvm/ADT/DenseMap.h:128:16:
warning: variable 'NumEntries' set but not used [-Wunused-but-set-variable]
128 | unsigned NumEntries = getNumEntries();
| ^
/wrkdirs/usr/ports/devel/llvm12/work/llvm-project-12.0.1.src/llvm/tools/sancov/sancov.cpp:512:42:
error: chosen constructor is explicit in copy-initialization
512 | return SpecialCaseList::createOrDie({{ClBlacklist}},
| ^~~~~~~~~~~~~
/usr/include/c++/v1/string:1153:64: note: explicit constructor declared
here
1153 | _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit
basic_string(const _Tp& __t) {
| ^
/usr/include/c++/v1/__vector/vector.h:276:91: note: passing argument to
parameter '__il' here
276 | _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI
vector(initializer_list<value_type> __il) {
|
^
In this case, `ClBlacklist` is an instance of `cl::opt`, not a
`std::string` as expected. Use `getValue()` to get the actual
`std::string` value.
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