Added a check for the -R linker option.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10056 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/autoconf/aclocal.m4 b/autoconf/aclocal.m4
index aca868a..32db1b3 100644
--- a/autoconf/aclocal.m4
+++ b/autoconf/aclocal.m4
@@ -6244,4 +6244,20 @@
fi
])
-
+#
+# Determine if the system can handle the -R option being passed to the linker.
+#
+AC_DEFUN([AC_LINK_USE_R],
+[
+ AC_LANG_SAVE
+ AC_LANG_C
+ oldcflags=${CFLAGS}
+ CFLAGS="${CFLAGS} -Wl,-R."
+ AC_LINK_IFELSE([int main() { return 0;}],[ac_cv_link_use_r=yes],[ac_cv_link_se_r=no])
+ CFLAGS=${oldcflags}
+ AC_LANG_RESTORE
+ if test "$ac_cv_link_use_r = yes"
+ then
+ AC_DEFINE([HAVE_LINK_R],[1])
+ fi
+])
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 06d06b9..c3d6c0a 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -523,6 +523,9 @@
AC_CHECK_FUNC(mmap,,AC_MSG_ERROR([Function mmap() required but not found]))
AC_CHECK_FUNC(mprotect,,AC_MSG_ERROR([Function mprotect() required but not found]))
+dnl Determine if the linker supports the -R option.
+AC_LINK_USE_R()
+
dnl **************************************************************************
dnl * Enable various compile-time options
dnl **************************************************************************
diff --git a/configure b/configure
index 4f70a4c..abdffc3 100755
--- a/configure
+++ b/configure
@@ -22980,6 +22980,56 @@
+
+
+ ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+ oldcflags=${CFLAGS}
+ CFLAGS="${CFLAGS} -Wl,-R."
+ cat >conftest.$ac_ext <<_ACEOF
+int main() { return 0;}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+ (eval $ac_link) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest$ac_exeext'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ ac_cv_link_use_r=yes
+else
+ echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_link_se_r=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+ CFLAGS=${oldcflags}
+ ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+ if test "$ac_cv_link_use_r = yes"
+ then
+ cat >>confdefs.h <<\_ACEOF
+#define HAVE_LINK_R 1
+_ACEOF
+
+ fi
+
+
+
# Check whether --enable-purify or --disable-purify was given.
if test "${enable_purify+set}" = set; then
enableval="$enable_purify"