diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/configure.in b/configure.in index 848af36667..57be606be1 100644 --- a/configure.in +++ b/configure.in @@ -2957,22 +2957,20 @@ AS_CASE(["$FIRSTMAKEFILE"], [*GNUmakefile:*], [gnumake=yes], [ AS_IF([test "$gnumake" = yes], [ NULLCMD=: ], [ AC_MSG_CHECKING([for safe null command for ${MAKE-make}]) mkdir conftest.dir - echo 'A=1' > conftest.dir/Makefile - echo 'B=$(A:1=@:)' >> conftest.dir/Makefile - echo 'all:; $B 1 2 3 4 5 6 7 8 9' >> conftest.dir/Makefile - if (cd conftest.dir; ${MAKE-make} >/dev/null 2>/dev/null); then - NULLCMD=: - else + NULLCMD= + for cmd in : true; do echo 'A=1' > conftest.dir/Makefile - echo 'B=$(A:1=@true)' >> conftest.dir/Makefile + echo 'B=$(A:1=@'$cmd')' >> conftest.dir/Makefile echo 'all:; $B 1 2 3 4 5 6 7 8 9' >> conftest.dir/Makefile if (cd conftest.dir; ${MAKE-make} >/dev/null 2>/dev/null); then - NULLCMD=true - else - AC_MSG_ERROR(no candidate for safe null command) + NULLCMD=$cmd + break fi - fi + done rm -fr conftest.dir + if test -z "$NULLCMD"; then + AC_MSG_ERROR(no candidate for safe null command) + fi AC_MSG_RESULT($NULLCMD) ]) AC_SUBST(NULLCMD) |