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authorFlorian Weimer <fweimer@redhat.com>2019-12-03 18:48:18 +0100
committerFlorian Weimer <fweimer@redhat.com>2019-12-03 18:48:18 +0100
commit9fb8139079ef0bb1aa33a4ae418cbb113b9b9da7 (patch)
tree0a48018fcd1d381c1a5f8bcfc2e0101fbd67c31e /configure
parent39c977b23e3e547e70d199a679b37bdf9c3223f6 (diff)
downloadglibc-9fb8139079ef0bb1aa33a4ae418cbb113b9b9da7.tar.gz
x86: Assume --enable-cet if GCC defaults to CET [BZ #25225]
This links in CET support if GCC defaults to CET. Otherwise, __CET__ is defined, yet CET functionality is not compiled and linked into the dynamic loader, resulting in a linker failure due to undefined references to _dl_cet_check and _dl_open_check.
Diffstat (limited to 'configure')
-rwxr-xr-xconfigure23
1 files changed, 22 insertions, 1 deletions
diff --git a/configure b/configure
index 2f44b66656..b959d2d988 100755
--- a/configure
+++ b/configure
@@ -3777,11 +3777,32 @@ else
fi
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+#ifndef __CET__
+#error no CET compiler support
+#endif
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ libc_cv_compiler_default_cet=yes
+else
+ libc_cv_compiler_default_cet=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
# Check whether --enable-cet was given.
if test "${enable_cet+set}" = set; then :
enableval=$enable_cet; enable_cet=$enableval
else
- enable_cet=no
+ enable_cet=$libc_cv_compiler_default_cet
fi