get rid of eh_frame bloat

if needed for debugging, it will be output in the .debug_frame section
instead, where it is not part of the loaded program and where the
strip command is free to strip it.

1 files changed, 12 insertions, 3 deletions

diff --git a/configure b/configure
index 11051800..4e3931c1 100755
--- a/configure
+++ b/configure
@@ -226,16 +226,25 @@ test "x$debug" = xyes && CFLAGS_AUTO="-g"
 tryflag CFLAGS_AUTO -pipe
 
 #
-# If debugging is disabled, omit bloated DWARF2 unwind tables & frame ptr
+# If debugging is disabled, omit frame pointer. Modern GCC does this
+# anyway on most archs even when debugging is enabled since the frame
+# pointer is no longer needed for debugging.
 #
 if fnmatch '-g*|*\ -g*' "$CFLAGS_AUTO $CFLAGS" ; then :
 else 
-tryflag CFLAGS_AUTO -fno-unwind-tables
-tryflag CFLAGS_AUTO -fno-asynchronous-unwind-tables
 tryflag CFLAGS_AUTO -fomit-frame-pointer
 fi
 
 #
+# Modern GCC wants to put DWARF tables (used for debugging and
+# unwinding) in the loaded part of the program where they are
+# unstrippable. These options force them back to debug sections (and
+# cause them not to get generated at all if debugging is off).
+#
+tryflag CFLAGS_AUTO -fno-unwind-tables
+tryflag CFLAGS_AUTO -fno-asynchronous-unwind-tables
+
+#
 # Some optimization levels add bloated alignment that hurt performance
 #
 tryflag CFLAGS_AUTO -falign-functions=1