From e7e86d7697c6ed1dbbde18d7185c35b6967945ed Mon Sep 17 00:00:00 2001 From: Leo Yan Date: Mon, 6 Oct 2025 17:21:26 +0100 Subject: perf build: Disable thread safety analysis for perl header When build with perl5, it reports error: In file included from /usr/lib/perl5/5.42.0/x86_64-linux-thread-multi/CORE/perl.h:7933: /usr/lib/perl5/5.42.0/x86_64-linux-thread-multi/CORE/inline.h:298:5: error: mutex 'PL_env_mutex.lock' is not held on every path through here [-Werror,-Wthread-safety-analysis] 298 | ENV_UNLOCK; | ^ /usr/lib/perl5/5.42.0/x86_64-linux-thread-multi/CORE/perl.h:7091:31: note: expanded from macro 'ENV_UNLOCK' 7091 | # define ENV_UNLOCK PERL_REENTRANT_UNLOCK("env"... | ^ /usr/lib/perl5/5.42.0/x86_64-linux-thread-multi/CORE/perl.h:6465:7: note: expanded from macro 'PERL_REENTRANT_UNLOCK' 6465 | } STMT_END | ^ /usr/lib/perl5/5.42.0/x86_64-linux-thread-multi/CORE/perl.h:865:28: note: expanded from macro 'STMT_END' 865 | # define STMT_END while (0) | ^ The error is caused by perl header but not perf code, disable thread safety analysis if including the header. Though GCC does not support the thread safety analysis option, this negative warning flag is silently ignored by it. Signed-off-by: Leo Yan Reviewed-by: Ian Rogers Link: https://lore.kernel.org/r/20251006-perf_build_android_ndk-v3-4-4305590795b2@arm.com Cc: Palmer Dabbelt Cc: Albert Ou Cc: Alexandre Ghiti Cc: Nick Desaulniers Cc: Justin Stitt Cc: Bill Wendling Cc: Adrian Hunter Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Namhyung Kim Cc: Nathan Chancellor Cc: James Clark Cc: linux-riscv@lists.infradead.org Cc: llvm@lists.linux.dev Cc: Paul Walmsley Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/scripts/perl/Perf-Trace-Util/Build | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'tools/perf/scripts/perl') diff --git a/tools/perf/scripts/perl/Perf-Trace-Util/Build b/tools/perf/scripts/perl/Perf-Trace-Util/Build index 9b0e5a8b5070..01a1a0ed51ae 100644 --- a/tools/perf/scripts/perl/Perf-Trace-Util/Build +++ b/tools/perf/scripts/perl/Perf-Trace-Util/Build @@ -2,7 +2,7 @@ perf-util-y += Context.o CFLAGS_Context.o += $(PERL_EMBED_CCOPTS) -Wno-redundant-decls -Wno-strict-prototypes -Wno-bad-function-cast -Wno-declaration-after-statement -Wno-switch-enum CFLAGS_Context.o += -Wno-unused-parameter -Wno-nested-externs -Wno-undef -CFLAGS_Context.o += -Wno-switch-default -Wno-shadow +CFLAGS_Context.o += -Wno-switch-default -Wno-shadow -Wno-thread-safety-analysis ifeq ($(CC_NO_CLANG), 1) CFLAGS_Context.o += -Wno-unused-command-line-argument -- cgit