diff options
| author | Jim Meyering <jim@meyering.net> | 1998-07-04 16:45:18 +0000 |
|---|---|---|
| committer | Jim Meyering <jim@meyering.net> | 1998-07-04 16:45:18 +0000 |
| commit | 5823a999fe2e818d168df76aff9d32b72d86c198 (patch) | |
| tree | 32fd24f8d3c77e7bc819f500c892fe46fb0fc7e6 /m4/regex.m4 | |
| parent | 218c464b91c4fb9195c283d60685219816ecfabd (diff) | |
| download | coreutils-5823a999fe2e818d168df76aff9d32b72d86c198.tar.xz | |
Use syscmd, ifelse, and sysval. Mainly as an exercise
to prove that this macro can be used in packages without regex.c.
Diffstat (limited to 'm4/regex.m4')
| -rw-r--r-- | m4/regex.m4 | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/m4/regex.m4 b/m4/regex.m4 index 001d203b8..073dac5b4 100644 --- a/m4/regex.m4 +++ b/m4/regex.m4 @@ -1,15 +1,23 @@ #serial 1 -dnl From grep. +dnl Derived from code in GNU grep. AC_DEFUN(jm_WITH_REGEX, [ - AC_ARG_WITH(included-regex, + dnl Even packages that don't use regex.c can use this macro. + dnl Of course, for them it doesn't do anything. + + syscmd([test -f lib/regex.c]) + ifelse(sysval, 0, + [ + AC_ARG_WITH(included-regex, [ --without-included-regex don't compile regex (use with caution)], - jm_with_regex=$withval, - jm_with_regex=yes) - if test "$jm_with_regex" = yes; then - LIBOBJS="$LIBOBJS regex.o" - fi + jm_with_regex=$withval, + jm_with_regex=yes) + if test "$jm_with_regex" = yes; then + LIBOBJS="$LIBOBJS regex.o" + fi + ], + ) ] ) |