Move local Autoconf macros into m4 directory

.gitignore

@@ -70,7 +70,8 @@
 log
 missing
 missing.lst
-m4
+m4/libtool.m4
+m4/lt*.m4
 py-compile
 python/.deps
 python/.libs

acinclude.m4

-dnl Like AC_TRY_EVAL but also errors out if the compiler generates
-dnl _any_ output. Some compilers might issue warnings which we want
-dnl to catch.
-AC_DEFUN([AC_TRY_EVAL2],
-[{ (eval echo configure:__oline__: \"[$]$1\") 1>&AS_MESSAGE_LOG_FD; dnl
-(eval [$]$1) 2>&AS_MESSAGE_LOG_FD; _out=`eval [$]$1 2>&1` && test "x$_out" = x; }])
-
-dnl Like AC_TRY_COMPILE but calls AC_TRY_EVAL2 instead of AC_TRY_EVAL
-AC_DEFUN([AC_TRY_COMPILE2],
-[cat > conftest.$ac_ext <<EOF
-[#]line __oline__ "configure"
-#include "confdefs.h"
-[$1]
-int main(void) {
-[$2]
-; return 0; }
-EOF
-if AC_TRY_EVAL2(ac_compile); then
-  ifelse([$3], , :, [rm -rf conftest*
-  $3])
-else
-  echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
-  cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
-ifelse([$4], , , [  rm -rf conftest*
-  $4
-])dnl
-fi
-rm -f conftest*])

m4/ac_try_compile2.m4

+dnl Like AC_TRY_EVAL but also errors out if the compiler generates
+dnl _any_ output. Some compilers might issue warnings which we want
+dnl to catch.
+AC_DEFUN([AC_TRY_EVAL2],
+[{ (eval echo configure:__oline__: \"[$]$1\") 1>&AS_MESSAGE_LOG_FD; dnl
+(eval [$]$1) 2>&AS_MESSAGE_LOG_FD; _out=`eval [$]$1 2>&1` && test "x$_out" = x; }])
+
+dnl Like AC_TRY_COMPILE but calls AC_TRY_EVAL2 instead of AC_TRY_EVAL
+AC_DEFUN([AC_TRY_COMPILE2],
+[cat > conftest.$ac_ext <<EOF
+[#]line __oline__ "configure"
+#include "confdefs.h"
+[$1]
+int main(void) {
+[$2]
+; return 0; }
+EOF
+if AC_TRY_EVAL2(ac_compile); then
+  ifelse([$3], , :, [rm -rf conftest*
+  $3])
+else
+  echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
+  cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD
+ifelse([$4], , , [  rm -rf conftest*
+  $4
+])dnl
+fi
+rm -f conftest*])