From: Don Zickus on gitlab.com
Merge Request: https://gitlab.com/cki-project/kernel-ark/-/merge_requests/2918
The following errors are showing up when compiling rtla with clang:
$ make HOSTCC=clang CC=clang LLVM_IAS=1
[...]
clang -O -g -DVERSION=\"6.8.0-rc1\" -flto=auto -ffat-lto-objects
-fexceptions -fstack-protector-strong
-fasynchronous-unwind-tables -fstack-clash-protection -Wall
-Werror=format-security -Wp,-D_FORTIFY_SOURCE=2
-Wp,-D_GLIBCXX_ASSERTIONS -Wno-maybe-uninitialized
$(pkg-config --cflags libtracefs)-c -o src/utils.o src/utils.c
clang: warning: optimization flag '-ffat-lto-objects' is not supported
[-Wignored-optimization-argument]
warning: unknown warning option '-Wno-maybe-uninitialized'; did you mean
'-Wno-uninitialized'? [-Wunknown-warning-option]
1 warning generated.
clang -o rtla -ggdb src/osnoise.o src/osnoise_hist.o src/osnoise_top.o
src/rtla.o src/timerlat_aa.o src/timerlat.o src/timerlat_hist.o
src/timerlat_top.o src/timerlat_u.o src/trace.o src/utils.o $(pkg-config
--libs libtracefs)
src/osnoise.o: file not recognized: file format not recognized
clang: error: linker command failed with exit code 1 (use -v to see
invocation)
make: *** [Makefile:110: rtla] Error 1
Solve these issues by:
- removing -ffat-lto-objects and -Wno-maybe-uninitialized if using clang
- informing the linker about -flto=auto
Reported-by: Donald Zickus
Signed-off-by: Daniel Bristot de Oliveira
---
tools/tracing/rtla/Makefile| 7 ++-
tools/verification/rv/Makefile | 7 ++-
2 files changed, 12 insertions(+), 2 deletions(-)
--
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