the pointer MMI keeps will start out with object-file format specific stuff
[llvm/avr.git] / autoconf / m4 / link_options.m4
blob66036de433d3c306b6b453714c6c00a2648ff05d
2 # Determine if the system can handle the -R option being passed to the linker.
4 # This macro is specific to LLVM.
6 AC_DEFUN([AC_LINK_USE_R],
7 [AC_CACHE_CHECK([for compiler -Wl,-R<path> option],[llvm_cv_link_use_r],
8 [ AC_LANG_PUSH([C])
9   oldcflags="$CFLAGS"
10   CFLAGS="$CFLAGS -Wl,-R."
11   AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],
12     [llvm_cv_link_use_r=yes],[llvm_cv_link_use_r=no])
13   CFLAGS="$oldcflags"
14   AC_LANG_POP([C])
16 if test "$llvm_cv_link_use_r" = yes ; then
17   AC_DEFINE([HAVE_LINK_R],[1],[Define if you can use -Wl,-R. to pass -R. to the linker, in order to add the current directory to the dynamic linker search path.])
18   fi
22 # Determine if the system can handle the -R option being passed to the linker.
24 # This macro is specific to LLVM.
26 AC_DEFUN([AC_LINK_EXPORT_DYNAMIC],
27 [AC_CACHE_CHECK([for compiler -Wl,-export-dynamic option],
28                 [llvm_cv_link_use_export_dynamic],
29 [ AC_LANG_PUSH([C])
30   oldcflags="$CFLAGS"
31   CFLAGS="$CFLAGS -Wl,-export-dynamic"
32   AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],
33     [llvm_cv_link_use_export_dynamic=yes],[llvm_cv_link_use_export_dynamic=no])
34   CFLAGS="$oldcflags"
35   AC_LANG_POP([C])
37 if test "$llvm_cv_link_use_export_dynamic" = yes ; then
38   AC_DEFINE([HAVE_LINK_EXPORT_DYNAMIC],[1],[Define if you can use -Wl,-export-dynamic.])
39   fi