Support the use of the STT_COMMON type. (In source and object files only at the moment)

1 files changed, 23 insertions, 1 deletions

diff --git a/bfd/configure.in b/bfd/configure.in
index facc1a3..ad8440e 100644
--- a/bfd/configure.in
+++ b/bfd/configure.in
@@ -31,6 +31,7 @@ AC_ARG_ENABLE(64-bit-bfd,
   no)   want64=false ;;
   *)    AC_MSG_ERROR(bad value ${enableval} for 64-bit-bfd option) ;;
 esac],[want64=false])dnl
+
 AC_ARG_ENABLE(targets,
 [  --enable-targets        alternative target configurations],
 [case "${enableval}" in
@@ -39,6 +40,7 @@ AC_ARG_ENABLE(targets,
   no)       enable_targets= ;;
   *)        enable_targets=$enableval ;;
 esac])dnl
+
 AC_ARG_ENABLE(commonbfdlib,
 [  --enable-commonbfdlib   build shared BFD/opcodes/libiberty library],
 [case "${enableval}" in
@@ -46,6 +48,7 @@ AC_ARG_ENABLE(commonbfdlib,
   no)  commonbfdlib=false ;;
   *)   AC_MSG_ERROR([bad value ${enableval} for BFD commonbfdlib option]) ;;
 esac])dnl
+
 AC_ARG_WITH(mmap,
 [  --with-mmap             try using mmap for BFD input files if available],
 [case "${withval}" in
@@ -67,13 +70,32 @@ if test $use_secureplt = true; then
 fi
 
 DEBUGDIR=${libdir}/debug
-	 
 AC_ARG_WITH(separate-debug-dir,
   AS_HELP_STRING([--with-separate-debug-dir=DIR],
                  [Look for global separate debug info in DIR [[default=LIBDIR/debug]]]),
 [DEBUGDIR="${withval}"])
 AC_SUBST(DEBUGDIR)
 
+# Check to see if we should allow the generation of
+# symbols with the ELF standard's STT_COMMON type.
+AC_ARG_ENABLE(elf-stt-common,
+[  --enable-elf-stt-common Allow the generation of ELF symbols with the STT_COMMON type],
+[case "${enableval}" in
+  yes) want_elf_stt_common=true ;;
+  no)  want_elf_stt_common=false ;;
+  *)   AC_MSG_ERROR(bad value ${enableval} for ELF STT_COMMON option) ;;
+ esac],
+# We have to choose a default behaviour.  For native builds we could
+# test whether the loader supports the STT_COMMON type, but that would
+# mean that built binaries could not be exported to older systems where
+# the loader does not support it. So by default we always choose to
+# disable this feature.
+  want_elf_stt_common=false)dnl
+if test $want_elf_stt_common = true; then
+  AC_DEFINE(USE_STT_COMMON, 1,
+    [Define if we may generate symbols with ELF's STT_COMMON type])
+fi
+	 
 ACX_PKGVERSION([GNU Binutils])
 ACX_BUGURL([http://www.sourceware.org/bugzilla/])