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[v3,2/4] Makefile: add -fno-semantic-interposition

Message ID 20200228154857.587-3-william.c.roberts@intel.com (mailing list archive)
State Changes Requested
Headers show
Series [v3,1/4] dso: drop hidden_proto and hidden_def | expand

Commit Message

William Roberts Feb. 28, 2020, 3:48 p.m. UTC
From: William Roberts <william.c.roberts@intel.com>

Add -fno-semantic-interposition to CFLAGS. This will restore
the DSO infrastructures protections to insure internal callers
of exported symbols call into libselinux and not something laoding first
in the library list.

Clang has this enabled by default.

Signed-off-by: William Roberts <william.c.roberts@intel.com>
 libselinux/src/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/libselinux/src/Makefile b/libselinux/src/Makefile
index 7f5a5d7418e9..c76110fbc650 100644
--- a/libselinux/src/Makefile
+++ b/libselinux/src/Makefile
@@ -65,7 +65,7 @@  EXTRA_CFLAGS = -fipa-pure-const -Wlogical-op -Wpacked-bitfield-compat -Wsync-nan
 	-Wcoverage-mismatch -Wcpp -Wformat-contains-nul -Wnormalized=nfc -Wsuggest-attribute=const \
 	-Wsuggest-attribute=noreturn -Wsuggest-attribute=pure -Wtrampolines -Wjump-misses-init \
 	-Wno-suggest-attribute=pure -Wno-suggest-attribute=const -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 \
-	-Wstrict-overflow=5
+	-Wstrict-overflow=5 -fno-semantic-interposition
 EXTRA_CFLAGS = -Wunused-command-line-argument