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| author | Yang Tse <yangsita@gmail.com> | 2007-03-07 01:13:03 +0000 |
|---|---|---|
| committer | Yang Tse <yangsita@gmail.com> | 2007-03-07 01:13:03 +0000 |
| commit | d31feb8ff9b905ddf7a73a966676ea4f9c197b02 (patch) | |
| tree | dca8e36256f81e921157b675e404ffabd4354b3d /ares | |
| parent | 4c3568bfd644e977cc6d56be6af56a29bea0cf5b (diff) | |
Autoconf redefines the M4 builtin macro 'm4_undefine' in such a way that
it fails if the macro that is being undefined is not already defined. To
make this work under all cases and be sure that at a certain point some
specific macro isn't defined we must use the following style in configure:
m4_ifdef([macro], [m4_undefine([macro])])
Diffstat (limited to 'ares')
| -rw-r--r-- | ares/configure.ac | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/ares/configure.ac b/ares/configure.ac index 2d09dbacc..09eb4eae9 100644 --- a/ares/configure.ac +++ b/ares/configure.ac @@ -64,11 +64,15 @@ AC_HELP_STRING([--disable-debug],[Disable debug options]), ) dnl skip libtool C++ and Fortran compiler checks +m4_ifdef([AC_PROG_CXX], [m4_undefine([AC_PROG_CXX])]) m4_defun([AC_PROG_CXX],[]) +m4_ifdef([AC_PROG_F77], [m4_undefine([AC_PROG_F77])]) m4_defun([AC_PROG_F77],[]) dnl skip libtool C++ and Fortran linker checks +m4_ifdef([AC_LIBTOOL_CXX], [m4_undefine([AC_LIBTOOL_CXX])]) m4_defun([AC_LIBTOOL_CXX],[]) +m4_ifdef([AC_LIBTOOL_F77], [m4_undefine([AC_LIBTOOL_F77])]) m4_defun([AC_LIBTOOL_F77],[]) dnl libtool setup |