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diff --git a/lib/libc/string/ffs.c b/lib/libc/string/ffs.c
--- a/lib/libc/string/ffs.c
+++ b/lib/libc/string/ffs.c
@@ -47,5 +47,5 @@
int
ffs(int mask)
{
- return (__builtin_ffs(mask));
+ return (mask == 0 ? 0 : __builtin_ctz(mask) + 1);
}
diff --git a/lib/libc/string/ffsl.c b/lib/libc/string/ffsl.c
--- a/lib/libc/string/ffsl.c
+++ b/lib/libc/string/ffsl.c
@@ -44,5 +44,5 @@
int
ffsl(long mask)
{
- return (__builtin_ffsl(mask));
+ return (mask == 0 ? 0 : __builtin_ctzl(mask) + 1);
}
diff --git a/lib/libc/string/ffsll.c b/lib/libc/string/ffsll.c
--- a/lib/libc/string/ffsll.c
+++ b/lib/libc/string/ffsll.c
@@ -44,5 +44,5 @@
int
ffsll(long long mask)
{
- return (__builtin_ffsll(mask));
+ return (mask == 0 ? 0 : __builtin_ctzll(mask) + 1);
}
diff --git a/tools/build/depend-cleanup.sh b/tools/build/depend-cleanup.sh
--- a/tools/build/depend-cleanup.sh
+++ b/tools/build/depend-cleanup.sh
@@ -124,3 +124,11 @@
"$OBJTOP"/obj-lib32/secure/lib/libcrypto \
"$OBJTOP"/obj-lib32/secure/lib/libssl
fi
+
+# 20230707 ee8b0c436d72 ffs/fls replaced
+clean_dep lib/libc ffs S
+clean_dep lib/libc ffsl S
+clean_dep lib/libc ffsll S
+clean_dep lib/libc fls S
+clean_dep lib/libc flsl S
+clean_dep lib/libc flsll S

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