| Message ID | 20240601014534.268360-3-jhubbard@nvidia.com |
|---|---|
| State | New |
| Headers | show |
| Series | selftests/openat2, fchmodat2: fix clang build failures | expand |
On Fri, May 31, 2024 at 06:45:34PM -0700, John Hubbard wrote: > gcc requires -static-libasan in order to ensure that Address Sanitizer's > library is the first one loaded. However, this leads to build failures > on clang, when building via: > > make LLVM=1 -C tools/testing/selftests > > However, clang already does the right thing by default: it statically > links the Address Sanitizer if -fsanitize is specified. Therefore, > simply omit -static-libasan for clang builds. And leave behind a > comment, because the whole reason for static linking might not be > obvious. > > Cc: Ryan Roberts <ryan.roberts@arm.com> > Signed-off-by: John Hubbard <jhubbard@nvidia.com> Assuming that $(LLVM) is the correct conditional to test for: Reviewed-by: Nathan Chancellor <nathan@kernel.org> > --- > tools/testing/selftests/fchmodat2/Makefile | 11 ++++++++++- > 1 file changed, 10 insertions(+), 1 deletion(-) > > diff --git a/tools/testing/selftests/fchmodat2/Makefile b/tools/testing/selftests/fchmodat2/Makefile > index 71ec34bf1501..4373cea79b79 100644 > --- a/tools/testing/selftests/fchmodat2/Makefile > +++ b/tools/testing/selftests/fchmodat2/Makefile > @@ -1,6 +1,15 @@ > # SPDX-License-Identifier: GPL-2.0-or-later > > -CFLAGS += -Wall -O2 -g -fsanitize=address -fsanitize=undefined -static-libasan $(KHDR_INCLUDES) > +CFLAGS += -Wall -O2 -g -fsanitize=address -fsanitize=undefined $(KHDR_INCLUDES) > + > +# gcc requires -static-libasan in order to ensure that Address Sanitizer's > +# library is the first one loaded. However, clang already statically links the > +# Address Sanitizer if -fsanitize is specified. Therefore, simply omit > +# -static-libasan for clang builds. > +ifeq ($(LLVM),) > + CFLAGS += -static-libasan > +endif > + > TEST_GEN_PROGS := fchmodat2_test > > include ../lib.mk > -- > 2.45.1 > >
diff --git a/tools/testing/selftests/fchmodat2/Makefile b/tools/testing/selftests/fchmodat2/Makefile index 71ec34bf1501..4373cea79b79 100644 --- a/tools/testing/selftests/fchmodat2/Makefile +++ b/tools/testing/selftests/fchmodat2/Makefile @@ -1,6 +1,15 @@ # SPDX-License-Identifier: GPL-2.0-or-later -CFLAGS += -Wall -O2 -g -fsanitize=address -fsanitize=undefined -static-libasan $(KHDR_INCLUDES) +CFLAGS += -Wall -O2 -g -fsanitize=address -fsanitize=undefined $(KHDR_INCLUDES) + +# gcc requires -static-libasan in order to ensure that Address Sanitizer's +# library is the first one loaded. However, clang already statically links the +# Address Sanitizer if -fsanitize is specified. Therefore, simply omit +# -static-libasan for clang builds. +ifeq ($(LLVM),) + CFLAGS += -static-libasan +endif + TEST_GEN_PROGS := fchmodat2_test include ../lib.mk
gcc requires -static-libasan in order to ensure that Address Sanitizer's library is the first one loaded. However, this leads to build failures on clang, when building via: make LLVM=1 -C tools/testing/selftests However, clang already does the right thing by default: it statically links the Address Sanitizer if -fsanitize is specified. Therefore, simply omit -static-libasan for clang builds. And leave behind a comment, because the whole reason for static linking might not be obvious. Cc: Ryan Roberts <ryan.roberts@arm.com> Signed-off-by: John Hubbard <jhubbard@nvidia.com> --- tools/testing/selftests/fchmodat2/Makefile | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)