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Add module mathl.
[gnulib.git]
/
m4
/
link-follow.m4
diff --git
a/m4/link-follow.m4
b/m4/link-follow.m4
index
a57ab88
..
6064ce7
100644
(file)
--- a/
m4/link-follow.m4
+++ b/
m4/link-follow.m4
@@
-1,13
+1,19
@@
-#serial
1
+#serial
3
dnl Run a program to determine whether whether link(2) follows symlinks.
dnl Set LINK_FOLLOWS_SYMLINKS accordingly.
dnl Run a program to determine whether whether link(2) follows symlinks.
dnl Set LINK_FOLLOWS_SYMLINKS accordingly.
-AC_DEFUN(
jm_AC_FUNC_LINK_FOLLOWS_SYMLINK
,
+AC_DEFUN(
[jm_AC_FUNC_LINK_FOLLOWS_SYMLINK]
,
[dnl
[dnl
- AC_CACHE_CHECK([whether link(2) follows symlinks],
+ AC_CACHE_CHECK(
+ [whether link(2) dereferences a symlink specified with a trailing slash],
jm_ac_cv_func_link_follows_symlink,
[
jm_ac_cv_func_link_follows_symlink,
[
- # Create a regular file, `conftest.file'.
+ dnl poor-man's AC_REQUIRE: FIXME: repair this once autoconf-3 provides
+ dnl the appropriate framework.
+ test -z "$ac_cv_header_unistd_h" \
+ && AC_CHECK_HEADERS(unistd.h)
+
+ # Create a regular file.
echo > conftest.file
AC_TRY_RUN(
[
echo > conftest.file
AC_TRY_RUN(
[
@@
-29,11
+35,11
@@
AC_DEFUN(jm_AC_FUNC_LINK_FOLLOWS_SYMLINK,
const char *hard = "conftest.hard";
struct stat sb_file, sb_hard;
const char *hard = "conftest.hard";
struct stat sb_file, sb_hard;
- /* Create a symlink
`conftest.sym' to it
. */
+ /* Create a symlink
to the regular file
. */
if (symlink (file, sym))
abort ();
if (symlink (file, sym))
abort ();
- /* Create a hard link
`conftest.hard'
to that symlink. */
+ /* Create a hard link to that symlink. */
if (link (sym, hard))
abort ();
if (link (sym, hard))
abort ();
@@
-49,7
+55,11
@@
AC_DEFUN(jm_AC_FUNC_LINK_FOLLOWS_SYMLINK,
],
jm_ac_cv_func_link_follows_symlink=yes,
jm_ac_cv_func_link_follows_symlink=no,
],
jm_ac_cv_func_link_follows_symlink=yes,
jm_ac_cv_func_link_follows_symlink=no,
- jm_ac_cv_func_link_follows_symlink=yes
,
We're cross compiling.
+ jm_ac_cv_func_link_follows_symlink=yes
dnl
We're cross compiling.
)
])
)
])
+ if test $jm_ac_cv_func_link_follows_symlink = yes; then
+ AC_DEFINE(LINK_FOLLOWS_SYMLINKS, 1,
+ [Define if `link(2)' dereferences symbolic links.])
+ fi
])
])