Mercurial > hg > octave-lojdl > gnulib-hg
changeset 1541:4f9c2dc056f0
Rewrite to set HAVE_LSTAT_EMPTY_STRING_BUG.
author | Jim Meyering <jim@meyering.net> |
---|---|
date | Sun, 08 Nov 1998 03:42:35 +0000 |
parents | 8a73e8a7a5d4 |
children | 399aca1d045b |
files | m4/lstat.m4 |
diffstat | 1 files changed, 29 insertions(+), 16 deletions(-) [+] |
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line diff
--- a/m4/lstat.m4 +++ b/m4/lstat.m4 @@ -1,20 +1,18 @@ -#serial 1 +#serial 2 dnl From Jim Meyering. -dnl Determine whether lstat has the bug that it succeeds when given the -dnl zero-length file name argument. The lstat from SunOS4.1.4 does this. -dnl -dnl If it doesn't, arrange to use the replacement function. +dnl Determine whether lstat has the `bug' that it succeeds when given the +dnl zero-length file name argument. The lstat from SunOS4.1.4 and the Hurd +dnl (as of 1998-11-01) does this. This behavior is allowed by POSIX. dnl -dnl If you use this macro in a package, you should -dnl add the following two lines to acconfig.h: -dnl /* Define to rpl_lstat if the replacement function should be used. */ -dnl #undef lstat +dnl If it does, then define HAVE_LSTAT_EMPTY_STRING_BUG and arrange to +dnl compile the wrapper function. dnl AC_DEFUN(jm_FUNC_LSTAT, [ - AC_CACHE_CHECK([for working lstat], jm_cv_func_working_lstat, + AC_CACHE_CHECK([whether lstat accepts an empty string], + jm_cv_func_lstat_empty_string_bug, [AC_TRY_RUN([ # include <sys/types.h> # include <sys/stat.h> @@ -23,16 +21,31 @@ main () { struct stat sbuf; - exit (lstat ("", &sbuf) == 0 ? 1 : 0); + exit (lstat ("", &sbuf) ? 1 : 0); } ], - jm_cv_func_working_lstat=yes, - jm_cv_func_working_lstat=no, + jm_cv_func_lstat_empty_string_bug=yes, + jm_cv_func_lstat_empty_string_bug=no, dnl When crosscompiling, assume lstat is broken. - jm_cv_func_working_lstat=no) + jm_cv_func_lstat_empty_string_bug=yes) ]) - if test $jm_cv_func_working_lstat = no; then + if test $jm_cv_func_lstat_empty_string_bug = yes; then + LIBOBJS="$LIBOBJS lstat.o" - AC_DEFINE_UNQUOTED(lstat, rpl_lstat) + + if test $jm_cv_func_lstat_empty_string_bug = yes; then + if test x = y; then + # This code is deliberately never run via ./configure. + # FIXME: this is a hack to make autoheader put the corresponding + # HAVE_* undef for this symbol in config.h.in. This saves me the + # trouble of having to maintain the #undef in acconfig.h manually. + AC_CHECK_FUNCS(LSTAT_EMPTY_STRING_BUG) + fi + # Defining it this way (rather than via AC_DEFINE) short-circuits the + # autoheader check -- autoheader doesn't know it's already been taken + # care of by the hack above. + ac_kludge=HAVE_LSTAT_EMPTY_STRING_BUG + AC_DEFINE_UNQUOTED($ac_kludge) + fi fi ])