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-rw-r--r--configure.in48
1 files changed, 48 insertions, 0 deletions
diff --git a/configure.in b/configure.in
index 8b797c7..11421ef 100644
--- a/configure.in
+++ b/configure.in
@@ -489,6 +489,54 @@ if test $libc_cv_asm_set_directive = yes; then
AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
fi
+AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive,
+[cat > conftest.s <<EOF
+.text
+_sym: ret
+.symver _sym,sym@VERS
+EOF
+if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
+ libc_cv_asm_symver_directive=yes
+else
+ libc_cv_asm_symver_directive=no
+fi
+rm -f conftest*])
+AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl
+if test $libc_cv_asm_symver_directive = yes; then
+ cat > conftest.s <<EOF
+.text
+_sym: ret
+.symver _sym,sym@VERS
+EOF
+ cat > conftest.map <<EOF
+VERS {
+ global: sym;
+};
+EOF
+ if ${CC-cc} -c $CFLAGS $CPPFLAGS conftest.s 1>&AC_FD_CC 2>&AC_FD_CC; then
+ if AC_TRY_COMMAND([${CC-cc} $CFLAGS --shared -o conftest.so conftest.o
+ -Wl,--version-script,conftest.map]);
+ then
+ libc_cv_ld_version_script_option=yes
+ else
+ libc_cv_ld_version_script_option=no
+ fi
+ else
+ libc_cv_ld_version_script_option=no
+ fi
+else
+ libc_cv_ld_version_script_option=no
+fi
+rm -f conftest*])
+if test $libc_cv_asm_symver_directive = yes &&
+ test $libc_cv_ld_version_script_option = yes; then
+ VERSIONING=yes
+ AC_DEFINE(DO_VERSIONING)
+else
+ VERSIONING=no
+fi
+AC_SUBST(VERSIONING)
+
if test $elf = yes; then
AC_CACHE_CHECK(for .previous assembler directive,
libc_cv_asm_previous_directive, [dnl