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-rw-r--r--gdb/configure.ac6
1 files changed, 6 insertions, 0 deletions
diff --git a/gdb/configure.ac b/gdb/configure.ac
index f77aa85..d52bd15 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1274,6 +1274,12 @@ fi
AC_CHECK_MEMBERS([struct reg.r_fs, struct reg.r_gs], [], [],
[#include <machine/reg.h>])
+# See if <sys/user.h> supports the %fs_base and %gs_bas amd64 segment registers.
+# Older amd64 Linux's don't have the fs_base and gs_base members of
+# `struct user_regs_struct'.
+AC_CHECK_MEMBERS([struct user_regs_struct.fs_base, struct user_regs_struct.gs_base],
+ [], [], [#include <sys/user.h>])
+
# See if <sys/ptrace.h> provides the PTRACE_GETREGS request.
AC_MSG_CHECKING(for PTRACE_GETREGS)
AC_CACHE_VAL(gdb_cv_have_ptrace_getregs,