From: Yang Tse Date: Wed, 7 Mar 2007 01:13:03 +0000 (+0000) Subject: Autoconf redefines the M4 builtin macro 'm4_undefine' in such a way that X-Git-Tag: curl-7_16_2~207 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d31feb8ff9b905ddf7a73a966676ea4f9c197b02;p=curl 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])]) --- 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 diff --git a/configure.ac b/configure.ac index b8a16f8e9..d54dd2fc5 100644 --- a/configure.ac +++ b/configure.ac @@ -116,11 +116,15 @@ dnl support building of Windows DLLs AC_LIBTOOL_WIN32_DLL 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