Bug 274038
| Summary: | devel/avr-gcc: fix build with libc++ 17 | ||||||
|---|---|---|---|---|---|---|---|
| Product: | Ports & Packages | Reporter: | Dimitry Andric <dim> | ||||
| Component: | Individual Port(s) | Assignee: | Joerg Wunsch <joerg> | ||||
| Status: | Closed FIXED | ||||||
| Severity: | Affects Only Me | Flags: | bugzilla:
maintainer-feedback?
(joerg) |
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| Priority: | --- | ||||||
| Version: | Latest | ||||||
| Hardware: | Any | ||||||
| OS: | Any | ||||||
| Bug Depends on: | |||||||
| Bug Blocks: | 273753 | ||||||
| Attachments: |
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Created attachment 245142 [details]
devel/avr-gcc: fix build with libc++ 17
Thanks for the analysis and patch, applied. A commit in branch main references this bug: URL: https://cgit.FreeBSD.org/ports/commit/?id=6275155b90de11398a1d105b053732313e7c1e7a commit 6275155b90de11398a1d105b053732313e7c1e7a Author: Joerg Wunsch <joerg@FreeBSD.org> AuthorDate: 2023-09-23 20:43:27 +0000 Commit: Joerg Wunsch <joerg@FreeBSD.org> CommitDate: 2023-09-23 20:46:17 +0000 devel/avr-gcc: Fix build with libc++ 17 gcc/system.h includes safe-ctype.h which redefines ctype macros such as toupper, tolower, etc to "poison" them. However, it should only include the safe-ctype.h header *after* any C++ headers, such as <list>, <map>, <string>, etc, otherwise these might transitively include internal ctype headers (such as with libc++ 17), causing compilation errors. PR: 274038 Reported by: dim devel/avr-gcc/Makefile | 2 +- devel/avr-gcc/files/patch-gcc_system.h (new) | 42 ++++++++++++++++++++++++++++ 2 files changed, 43 insertions(+), 1 deletion(-) |
When building relatively recent gcc ports (with C++ in them) against libc++ 17, you get errors similar to: In file included from /wrkdirs/usr/ports/lang/gcc12/work/gcc-12.2.0/gcc/cp/module.cc:208: In file included from /wrkdirs/usr/ports/lang/gcc12/work/gcc-12.2.0/gcc/system.h:239: In file included from /usr/include/c++/v1/vector:321: In file included from /usr/include/c++/v1/__format/formatter_bool.h:20: In file included from /usr/include/c++/v1/__format/formatter_integral.h:32: In file included from /usr/include/c++/v1/locale:202: /usr/include/c++/v1/__locale:546:5: error: '__abi_tag__' attribute only applies to structs, variables, functions, and namespaces 546 | _LIBCPP_INLINE_VISIBILITY | ^ /usr/include/c++/v1/__config:813:37: note: expanded from macro '_LIBCPP_INLINE_VISIBILITY' 813 | # define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI | ^ /usr/include/c++/v1/__config:792:26: note: expanded from macro '_LIBCPP_HIDE_FROM_ABI' 792 | __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_VERSIONED_IDENTIFIER)))) | ^ In file included from /wrkdirs/usr/ports/lang/gcc12/work/gcc-12.2.0/gcc/cp/module.cc:208: In file included from /wrkdirs/usr/ports/lang/gcc12/work/gcc-12.2.0/gcc/system.h:239: In file included from /usr/include/c++/v1/vector:321: In file included from /usr/include/c++/v1/__format/formatter_bool.h:20: In file included from /usr/include/c++/v1/__format/formatter_integral.h:32: In file included from /usr/include/c++/v1/locale:202: /usr/include/c++/v1/__locale:547:37: error: expected ';' at end of declaration list 547 | char_type toupper(char_type __c) const | ^ /usr/include/c++/v1/__locale:553:48: error: too many arguments provided to function-like macro invocation 553 | const char_type* toupper(char_type* __low, const char_type* __high) const | ^ /wrkdirs/usr/ports/lang/gcc12/work/gcc-12.2.0/gcc/../include/safe-ctype.h:146:9: note: macro 'toupper' defined here 146 | #define toupper(c) do_not_use_toupper_with_safe_ctype | ^ This is because gcc/system.h includes safe-ctype.h which redefines ctype macros such as toupper, tolower, etc to "poison" them. However, it should only include the safe-ctype.h header *after* any C++ headers, such as <list>, <map>, <string>, etc, otherwise these might transitively include internal ctype headers (such as with libc++ 17), causing the above conflicts. Here is a patch that moves the safe-ctype.h inclusion to later in gcc/system.h, which solves this issue, and makes it possible to build against libc++ 17.