| Reid Spencer | 491f681 | 2004-09-07 06:56:14 +0000 | [diff] [blame] | 1 | # |
| 2 | # Determine if the system can handle the -R option being passed to the linker. |
| 3 | # |
| 4 | # This macro is specific to LLVM. |
| 5 | # |
| 6 | AC_DEFUN([AC_LINK_USE_R], |
| 7 | [ |
| 8 | AC_MSG_CHECKING([for compiler -Wl,-R<path> option]) |
| Reid Spencer | 12de17d | 2004-09-19 22:31:49 +0000 | [diff] [blame] | 9 | AC_LANG_PUSH([C]) |
| Reid Spencer | 491f681 | 2004-09-07 06:56:14 +0000 | [diff] [blame] | 10 | oldcflags="$CFLAGS" |
| 11 | CFLAGS="$CFLAGS -Wl,-R." |
| Reid Spencer | a42b525 | 2004-09-20 04:08:22 +0000 | [diff] [blame] | 12 | AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],[[int main() { return 0; }]])],[ac_cv_link_use_r=yes],[ac_cv_link_use_r=no]) |
| Reid Spencer | 491f681 | 2004-09-07 06:56:14 +0000 | [diff] [blame] | 13 | CFLAGS="$oldcflags" |
| Reid Spencer | 12de17d | 2004-09-19 22:31:49 +0000 | [diff] [blame] | 14 | AC_LANG_POP([C]) |
| Reid Spencer | 491f681 | 2004-09-07 06:56:14 +0000 | [diff] [blame] | 15 | AC_MSG_RESULT($ac_cv_link_use_r) |
| 16 | if test "$ac_cv_link_use_r" = yes |
| 17 | then |
| 18 | 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.]) |
| 19 | fi |
| 20 | ]) |