From: Andrzej Hunt <ajrhunt@xxxxxxxxxx>
Clang no longer produces a libFuzzer.a, instead you can include
libFuzzer by using -fsanitize=fuzzer. Therefore we should use
that in the example command for building fuzzers.
I happen to have tested with LLVM 11 - however -fsanitize=fuzzer appears to
work in a wide range of reasonably modern clangs.
(On my system what used to be libFuzzer.a now lives under the following path,
which is tricky albeit not impossible for a novice such as myself to find:
/usr/lib64/clang/11.0.0/lib/linux/libclang_rt.fuzzer-x86_64.a )
Signed-off-by: Andrzej Hunt <ajrhunt@xxxxxxxxxx>
---
Update 'make fuzz-all' docs to reflect modern clang
I would like to update the examples for 'make fuzz-all' to make it
easier to build fuzzers locally.
This change should make it easier for the uninitiated to build fuzzers
locally without first having to figure out what LIB_FUZZING_ENGINE is
for.
ATB, Andrzej
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-889%2Fahunt%2Ffuzz-docs-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-889/ahunt/fuzz-docs-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/889
Makefile | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Makefile b/Makefile
index 9b1bde2e0e64..9f8f459f87b4 100644
--- a/Makefile
+++ b/Makefile
@@ -3291,11 +3291,11 @@ cover_db_html: cover_db
# are not necessarily appropriate for general builds, and that vary greatly
# depending on the compiler version used.
#
-# An example command to build against libFuzzer from LLVM 4.0.0:
+# An example command to build against libFuzzer from LLVM 11.0.0:
#
# make CC=clang CXX=clang++ \
# CFLAGS="-fsanitize-coverage=trace-pc-guard -fsanitize=address" \
-# LIB_FUZZING_ENGINE=/usr/lib/llvm-4.0/lib/libFuzzer.a \
+# LIB_FUZZING_ENGINE=-fsanitize=fuzzer \
# fuzz-all
#
FUZZ_CXXFLAGS ?= $(CFLAGS)
base-commit: 225365fb5195e804274ab569ac3cc4919451dc7f
--
gitgitgadget
