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

diff --git a/gdb/configure b/gdb/configure
index 1d03188f54a50e8d7aef4d481660e0a81a14fd87..90927fffce5e7b0e0914c5ce9f10febbb7b9f8fa 100755 (executable)
--- a/gdb/configure
+++ b/gdb/configure
@@ -795,6 +795,7 @@ with_zlib
 with_libiconv_prefix
 with_iconv_bin
 with_system_readline
+enable_libmcheck
 with_jit_reader_dir
 with_expat
 with_gnu_ld
@@ -1465,6 +1466,7 @@ Optional Features:
   --enable-tui            enable full-screen terminal user interface (TUI)
   --enable-gdbtk          enable gdbtk graphical user interface (GUI)
   --enable-profiling      enable profiling of GDB
+  --enable-libmcheck      Try building GDB with -lmcheck if available
   --disable-rpath         do not hardcode runtime library paths
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
@@ -7039,7 +7041,26 @@ fi
 
 
 
-if $development; then
+# Provide a --enable-libmcheck/--disable-libmcheck set of options
+# allowing a user to enable this option even when building releases,
+# or to disable it when building a snapshot.
+# Check whether --enable-libmcheck was given.
+if test "${enable_libmcheck+set}" = set; then :
+  enableval=$enable_libmcheck; case "${enableval}" in
+     yes | y) ENABLE_LIBMCHECK="yes" ;;
+     no | n)  ENABLE_LIBMCHECK="no" ;;
+     *) as_fn_error "bad value ${enableval} for --enable-libmcheck" "$LINENO" 5 ;;
+   esac
+fi
+
+
+# Enable -lmcheck by default (it provides cheap-enough memory mangling),
+# but turn it off for releases.
+if test -z "${ENABLE_LIBMCHECK}" && $development; then
+    ENABLE_LIBMCHECK=yes
+fi
+
+if test "$ENABLE_LIBMCHECK" = "yes" ; then
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for main in -lmcheck" >&5
 $as_echo_n "checking for main in -lmcheck... " >&6; }
 if test "${ac_cv_lib_mcheck_main+set}" = set; then :
@@ -8850,7 +8871,7 @@ fi
 # FIXME: kettenis/20030102: In most cases we include these (ctype.h, time.h)
 # unconditionally, so what's the point in checking these?
 for ac_header in nlist.h machine/reg.h poll.h sys/poll.h proc_service.h \
-                  thread_db.h gnu/libc-version.h signal.h stddef.h \
+                  thread_db.h signal.h stddef.h \
                  stdlib.h string.h memory.h strings.h sys/fault.h \
                  sys/file.h sys/filio.h sys/ioctl.h sys/param.h \
                  sys/resource.h sys/procfs.h sys/ptrace.h ptrace.h \
@@ -10612,6 +10633,31 @@ _ACEOF
 fi
 
 
+# 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_fn_c_check_member "$LINENO" "struct user_regs_struct" "fs_base" "ac_cv_member_struct_user_regs_struct_fs_base" "#include <sys/user.h>
+"
+if test "x$ac_cv_member_struct_user_regs_struct_fs_base" = x""yes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_USER_REGS_STRUCT_FS_BASE 1
+_ACEOF
+
+
+fi
+ac_fn_c_check_member "$LINENO" "struct user_regs_struct" "gs_base" "ac_cv_member_struct_user_regs_struct_gs_base" "#include <sys/user.h>
+"
+if test "x$ac_cv_member_struct_user_regs_struct_gs_base" = x""yes; then :
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_STRUCT_USER_REGS_STRUCT_GS_BASE 1
+_ACEOF
+
+
+fi
+
+
 # See if <sys/ptrace.h> provides the PTRACE_GETREGS request.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PTRACE_GETREGS" >&5
 $as_echo_n "checking for PTRACE_GETREGS... " >&6; }
@@ -12365,7 +12411,8 @@ fi
 build_warnings="-Wall -Wdeclaration-after-statement -Wpointer-arith \
 -Wformat-nonliteral -Wno-pointer-sign \
 -Wno-unused -Wunused-value -Wunused-function \
--Wno-switch -Wno-char-subscripts -Wmissing-prototypes"
+-Wno-switch -Wno-char-subscripts -Wmissing-prototypes \
+-Wdeclaration-after-statement"
 
 # Enable -Wno-format by default when using gcc on mingw since many
 # GCC versions complain about %I64.