Looking at the results of the tests executed
by plugin.exp on x86_64 Fedora 10, I don't see
any evidence that -rdynamic is ever used. Can't
we reduce the tests performed as follow since
only -shared appears to be actually used? Removing
these tests would eliminate all of the problems
with not having 'nm -D' or objdump on different hosts.
Jack
ps I understand we are removing the test for
exported symbols but isn't that understood to
be satisfied when -shared is used?
Index: gcc/configure.ac
===================================================================
--- gcc/configure.ac (revision 158645)
+++ gcc/configure.ac (working copy)
@@ -4425,24 +4425,6 @@
pluginlibs=
if test x"$enable_plugin" = x"yes"; then
- AC_MSG_CHECKING([for exported symbols])
- echo "int main() {return 0;} int foobar() {return 0;}" > conftest.c
- ${CC} ${CFLAGS} ${LDFLAGS} conftest.c -o conftest > /dev/null 2>&1
- if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
- : # No need to use a flag
- else
- AC_MSG_CHECKING([for -rdynamic])
- ${CC} ${CFLAGS} ${LDFLAGS} -rdynamic conftest.c -o conftest > /dev/null
2>&1
- if $gcc_cv_objdump -T conftest | grep foobar > /dev/null; then
- plugin_rdynamic=yes
- pluginlibs="-rdynamic"
- else
- plugin_rdynamic=no
- enable_plugin=no
- fi
- AC_MSG_RESULT([$plugin_rdynamic])
- fi
-
# Check -ldl
saved_LIBS="$LIBS"
AC_SEARCH_LIBS([dlopen], [dl])
@@ -4453,7 +4435,14 @@
# Check that we can build shared objects with -fPIC -shared
saved_LDFLAGS="$LDFLAGS"
- LDFLAGS="$LDFLAGS -fPIC -shared"
+ case "${host}" in
+ *-*-darwin*)
+ LDFLAGS="$LDFLAGS -fPIC -shared -undefined dynamic_lookup"
+ ;;
+ *)
+ LDFLAGS="$LDFLAGS -fPIC -shared"
+ ;;
+ esac
AC_MSG_CHECKING([for -fPIC -shared])
AC_TRY_LINK(
[extern int X;],[return X == 0;],
@@ -4470,7 +4459,7 @@
if test x"$default_plugin" != x"yes"; then
AC_MSG_ERROR([
Building GCC with plugin support requires a host that supports
--fPIC, -shared, -ldl and -rdynamic.])
+-fPIC, -shared and -ldl.])
fi
fi
fi
