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Diffstat (limited to 'autoconf/ast_prog_sed.m4')
| -rw-r--r-- | autoconf/ast_prog_sed.m4 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/autoconf/ast_prog_sed.m4 b/autoconf/ast_prog_sed.m4 new file mode 100644 index 000000000..283d52f55 --- /dev/null +++ b/autoconf/ast_prog_sed.m4 @@ -0,0 +1,21 @@ +# AST_PROG_SED +# ----------- +# Check for a fully functional sed program that truncates +# as few characters as possible. Prefer GNU sed if found. +AC_DEFUN([AST_PROG_SED], +[AC_CACHE_CHECK([for a sed that does not truncate output], ac_cv_path_SED, + [dnl ac_script should not contain more than 99 commands (for HP-UX sed), + dnl but more than about 7000 bytes, to catch a limit in Solaris 8 /usr/ucb/sed. + ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/ + for ac_i in 1 2 3 4 5 6 7; do + ac_script="$ac_script$as_nl$ac_script" + done + echo "$ac_script" | sed 99q >conftest.sed + $as_unset ac_script || ac_script= + _AC_PATH_PROG_FEATURE_CHECK(SED, [sed gsed], + [_AC_FEATURE_CHECK_LENGTH([ac_path_SED], [ac_cv_path_SED], + ["$ac_path_SED" -f conftest.sed])])]) + SED="$ac_cv_path_SED" + AC_SUBST([SED])dnl + rm -f conftest.sed +])# AST_PROG_SED |