X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fstat.m4;h=4883fe25eeaee32ed87360dab98bae55249773de;hb=939dedd9a2fba934e5ff0313155f9f5f39cb6f6f;hp=c6070dcdd521548ecf333a1e089684e8ccb69906;hpb=b025ea62d54ac5693eb5133d993c40b13f730ace;p=gnulib.git diff --git a/m4/stat.m4 b/m4/stat.m4 index c6070dcdd..4883fe25e 100644 --- a/m4/stat.m4 +++ b/m4/stat.m4 @@ -1,51 +1,67 @@ -#serial 2 +# serial 6 -dnl From Jim Meyering. -dnl Determine whether stat has the `bug' that it succeeds when given the -dnl zero-length file name argument. The stat from SunOS4.1.4 and the Hurd -dnl (as of 1998-11-01) does this. This behavior is allowed by POSIX. -dnl -dnl If it does, then define HAVE_STAT_EMPTY_STRING_BUG and arrange to -dnl compile the wrapper function. -dnl +# Copyright (C) 2009-2011 Free Software Foundation, Inc. +# +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. -AC_DEFUN(jm_FUNC_STAT, +AC_DEFUN([gl_FUNC_STAT], [ - AC_CACHE_CHECK([whether stat accepts an empty string], - jm_cv_func_stat_empty_string_bug, - [AC_TRY_RUN([ -# include -# include - - int - main () - { - struct stat sbuf; - exit (stat ("", &sbuf) ? 1 : 0); - } - ], - jm_cv_func_stat_empty_string_bug=yes, - jm_cv_func_stat_empty_string_bug=no, - dnl When crosscompiling, assume stat is broken. - jm_cv_func_stat_empty_string_bug=yes) - ]) - if test $jm_cv_func_stat_empty_string_bug = yes; then - - LIBOBJS="$LIBOBJS stat.o" - - if test $jm_cv_func_stat_empty_string_bug = yes; then - if test x = y; then - # This code is deliberately never run via ./configure. - # FIXME: this is a hack to make autoheader put the corresponding - # HAVE_* undef for this symbol in config.h.in. This saves me the - # trouble of having to maintain the #undef in acconfig.h manually. - AC_CHECK_FUNCS(STAT_EMPTY_STRING_BUG) - fi - # Defining it this way (rather than via AC_DEFINE) short-circuits the - # autoheader check -- autoheader doesn't know it's already been taken - # care of by the hack above. - ac_kludge=HAVE_STAT_EMPTY_STRING_BUG - AC_DEFINE_UNQUOTED($ac_kludge) - fi + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_REQUIRE([gl_AC_DOS]) + AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS]) + AC_CHECK_FUNCS_ONCE([lstat]) + dnl mingw is the only known platform where stat(".") and stat("./") differ + AC_CACHE_CHECK([whether stat handles trailing slashes on directories], + [gl_cv_func_stat_dir_slash], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include +]], [[struct stat st; return stat (".", &st) != stat ("./", &st);]])], + [gl_cv_func_stat_dir_slash=yes], [gl_cv_func_stat_dir_slash=no], + [case $host_os in + mingw*) gl_cv_func_stat_dir_slash="guessing no";; + *) gl_cv_func_stat_dir_slash="guessing yes";; + esac])]) + dnl AIX 7.1, Solaris 9 mistakenly succeed on stat("file/") + dnl FreeBSD 7.2 mistakenly succeeds on stat("link-to-file/") + AC_CACHE_CHECK([whether stat handles trailing slashes on files], + [gl_cv_func_stat_file_slash], + [touch conftest.tmp + # Assume that if we have lstat, we can also check symlinks. + if test $ac_cv_func_lstat = yes; then + ln -s conftest.tmp conftest.lnk + fi + AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#include +]], [[int result = 0; + struct stat st; + if (!stat ("conftest.tmp/", &st)) + result |= 1; +#if HAVE_LSTAT + if (!stat ("conftest.lnk/", &st)) + result |= 2; +#endif + return result; + ]])], + [gl_cv_func_stat_file_slash=yes], [gl_cv_func_stat_file_slash=no], + [gl_cv_func_stat_file_slash="guessing no"]) + rm -f conftest.tmp conftest.lnk]) + case $gl_cv_func_stat_dir_slash in + *no) REPLACE_STAT=1 + AC_DEFINE([REPLACE_FUNC_STAT_DIR], [1], [Define to 1 if stat needs + help when passed a directory name with a trailing slash]);; + esac + case $gl_cv_func_stat_file_slash in + *no) REPLACE_STAT=1 + AC_DEFINE([REPLACE_FUNC_STAT_FILE], [1], [Define to 1 if stat needs + help when passed a file name with a trailing slash]);; + esac + if test $REPLACE_STAT = 1; then + AC_LIBOBJ([stat]) + dnl Prerequisites of lib/stat.c. + AC_REQUIRE([AC_C_INLINE]) fi ])