* acconfig.h (HAVE_R_FS, HAVE_R_GS): Add.

[deliverable/binutils-gdb.git] / gdb / configure.in

diff --git a/gdb/configure.in b/gdb/configure.in
index b0096873f111cb591f4a78d469f9ba350fe5a77e..e2bc5aa620cfd698de2ede6280cae82ec92d265b 100644 (file)
--- a/gdb/configure.in
+++ b/gdb/configure.in
@@ -111,6 +111,21 @@ AC_C_CONST
 AC_CHECK_FUNCS(setpgid sbrk sigaction isascii bzero bcopy btowc poll sigprocmask)
 AC_FUNC_ALLOCA
 
+# See if machine/reg.h supports the %fs and %gs i386 segment registers.
+# Older i386 BSD's don't have the r_fs and r_gs members of `struct reg'.
+AC_CACHE_CHECK([for r_fs in struct reg], gdb_cv_struct_r_fs,
+[AC_TRY_COMPILE([#include <machine/reg.h>], [struct reg r; r.r_fs;],
+gdb_cv_struct_r_fs=yes, gdb_cv_struct_r_fs=no)])
+if test $gdb_cv_struct_r_fs = yes; then
+  AC_DEFINE(HAVE_R_FS)
+fi
+AC_CACHE_CHECK([for r_gs in struct reg], gdb_cv_struct_r_gs,
+[AC_TRY_COMPILE([#include <machine/reg.h>], [struct reg r; r.r_gs;],
+gdb_cv_struct_r_gs=yes, gdb_cv_struct_r_gs=no)])
+if test $gdb_cv_struct_r_gs = yes; then
+  AC_DEFINE(HAVE_R_GS)
+fi
+
 dnl See if ptrace.h provides the PTRACE_GETREGS request.
 AC_MSG_CHECKING(for PTRACE_GETREGS)
 AC_CACHE_VAL(gdb_cv_have_ptrace_getregs,