+
+ # Linux ld can selectively override scope, e.g., of symbols beginning with
+ # "_" by first declaring some as global, and then using a wildcard to
+ # declare the others as local. Some other loaders cannot do this. Check
+ # by constructing a (very) simple shared library and inspecting its
+ # symbols.
+ if test "x$VERSIONED_SYMS" != "x"
+ then
+ echo "$as_me:6529: checking if wildcards can be used to selectively omit symbols" >&5
+echo $ECHO_N "checking if wildcards can be used to selectively omit symbols... $ECHO_C" >&6
+ WILDCARD_SYMS=no
+
+ # make sources
+ rm -f conftest.*
+
+ cat >conftest.ver <<EOF
+module_1.0 {
+global:
+ globalf1;
+local:
+ localf1;
+};
+module_2.0 {
+global:
+ globalf2;
+local:
+ localf2;
+ _*;
+} module_1.0;
+submodule_1.0 {
+global:
+ subglobalf1;
+ _ismissing;
+local:
+ sublocalf1;
+};
+submodule_2.0 {
+global:
+ subglobalf2;
+local:
+ sublocalf2;
+ _*;
+} submodule_1.0;
+EOF
+ cat >conftest.$ac_ext <<EOF
+#line 6566 "configure"
+int _ismissing(void) { return 1; }
+int _localf1(void) { return 1; }
+int _localf2(void) { return 2; }
+int globalf1(void) { return 1; }
+int globalf2(void) { return 2; }
+int _sublocalf1(void) { return 1; }
+int _sublocalf2(void) { return 2; }
+int subglobalf1(void) { return 1; }
+int subglobalf2(void) { return 2; }
+EOF
+ cat >conftest.mk <<EOF
+CC=${CC}
+CFLAGS=${CFLAGS}
+CPPFLAGS=${CPPFLAGS}
+LDFLAGS=${LDFLAGS}
+LIBS=${LIBS}
+VERSIONED_SYMS=${VERSIONED_SYMS}
+RESULTING_SYMS=conftest.ver
+MK_SHARED_LIB=${MK_SHARED_LIB}
+conftest.so: conftest.$ac_cv_objext
+ \$(MK_SHARED_LIB) conftest.$ac_cv_objext
+EOF
+
+ # compile source, make library
+ if make -f conftest.mk 2>&5 >/dev/null
+ then
+ # test for missing symbol
+ cf_missing=`nm -P conftest.so 2>&5 |fgrep _ismissing | egrep '[ ]T[ ]'`
+ test -n "$cf_missing" && WILDCARD_SYMS=yes
+ fi
+ echo "$as_me:6597: result: $WILDCARD_SYMS" >&5
+echo "${ECHO_T}$WILDCARD_SYMS" >&6
+ rm -f conftest.*
+ fi
projects / ncurses.git / commitdiff