https://gcc.gnu.org/g:026c00babbe16d5a8525d2e59066d381615705c4
commit r16-6532-g026c00babbe16d5a8525d2e59066d381615705c4 Author: Rainer Orth <[email protected]> Date: Wed Jan 7 06:53:23 2026 +0100 Allow disabling -gctf non-C warning [PR123259] In mixed-language builds it may be difficult to restrict -gctf to only C-language sources. However, the cc1plus: note: CTF debug info requested, but not supported for ‘GNU C++17’ frontend warning for non-C languages, which is perfectly benign, may confuse parts of the build, so it may be useful to disable it. This patch applies the existing -Wno-complain-wrong-lang option to suppress it. Bootstrapped without regressions on i386-pc-solaris2.11 sparc-sun-solaris2.11, also with C/C++-only bootstraps that apply -gctf/-gsctf via STAGE[23]_CFLAGS and STAGE[23]_TFLAGS. 2025-12-25 Rainer Orth <[email protected]> gcc: PR debug/123259 * toplev.cc (process_options): Guard CTF non-C warning by -Wcomplain-wrong-lang. * doc/invoke.texi (Warning Options, -Wno-complain-wrong-lang): Document effect on -gctf/-gsctf. Diff: --- gcc/doc/invoke.texi | 4 ++++ gcc/toplev.cc | 3 ++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index bae66ba6c45f..f6c79b051d06 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -10153,6 +10153,10 @@ The latter front end diagnoses @samp{f951: Warning: command-line option '-fno-rtti' is valid for C++/D/ObjC++ but not for Fortran}, which may be disabled with @option{-Wno-complain-wrong-lang}. +This option can also be used to disable warnings like +@samp{cc1plus: note: CTF debug info requested, but not supported for 'GNU C++20' frontend} +produced by @option{-gctf} or @option{-gsctf} for unsupported languages. + @opindex Wcompare-distinct-pointer-types @item -Wcompare-distinct-pointer-types @r{(C and Objective-C only)} Warn if pointers of distinct types are compared without a cast. This diff --git a/gcc/toplev.cc b/gcc/toplev.cc index 1eaaffdb3cf2..9c93eb8ce1dc 100644 --- a/gcc/toplev.cc +++ b/gcc/toplev.cc @@ -1436,7 +1436,8 @@ process_options () /* CTF is supported for only C at this time. */ if (!lang_GNU_C () - && ctf_debug_info_level > CTFINFO_LEVEL_NONE) + && ctf_debug_info_level > CTFINFO_LEVEL_NONE + && warn_complain_wrong_lang) { /* Compiling with -flto results in frontend language of GNU GIMPLE. It is not useful to warn in that case. */
