Mercurial > hg > octave-lojdl > gnulib-hg
changeset 16826:31a7d8d65261
link-follow: Avoid guessing wrong when cross-compiling to glibc/Linux.
* m4/link-follow.m4 (gl_FUNC_LINK_FOLLOWS_SYMLINK): Require
AC_CANONICAL_HOST. When cross-compiling to a glibc/Linux platform,
set gl_cv_func_link_follows_symlink to "guessing no".
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 05 May 2012 12:50:17 +0200 |
parents | 577fb1a57190 |
children | fa47ffe05247 |
files | ChangeLog m4/link-follow.m4 |
diffstat | 2 files changed, 22 insertions(+), 6 deletions(-) [+] |
line wrap: on
line diff
--- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2012-05-05 Bruno Haible <bruno@clisp.org> + + link-follow: Avoid guessing wrong when cross-compiling to glibc/Linux. + * m4/link-follow.m4 (gl_FUNC_LINK_FOLLOWS_SYMLINK): Require + AC_CANONICAL_HOST. When cross-compiling to a glibc/Linux platform, + set gl_cv_func_link_follows_symlink to "guessing no". + 2012-05-05 Bruno Haible <bruno@clisp.org> tzset: Avoid guessing wrong when cross-compiling to glibc systems.
--- a/m4/link-follow.m4 +++ b/m4/link-follow.m4 @@ -1,4 +1,4 @@ -# serial 17 +# serial 18 dnl Run a program to determine whether link(2) follows symlinks. dnl Set LINK_FOLLOWS_SYMLINKS accordingly. @@ -16,6 +16,7 @@ dnl runtime test. If it is -2, use a generic runtime test. AC_DEFUN([gl_FUNC_LINK_FOLLOWS_SYMLINK], [dnl + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CHECK_FUNCS_ONCE([readlink]) dnl Mingw lacks link, although gnulib provides a good replacement. dnl However, it also lacks symlink, so there's nothing to test in @@ -81,13 +82,21 @@ ]])], [gl_cv_func_link_follows_symlink=no], dnl GNU behavior [gl_cv_func_link_follows_symlink=yes], dnl Followed link/compile failed - [gl_cv_func_link_follows_symlink=unknown] dnl We're cross compiling. - ) + [dnl We're cross compiling. + dnl The past results are "yes" on MacOS X, FreeBSD, NetBSD, + dnl OpenBSD, Minix, AIX, HP-UX, OSF/1, and "no" on Linux, Cygwin. + case "$host_os" in + # On glibc/Linux we know the result. + linux*-gnu*) gl_cv_func_link_follows_symlink="guessing no" ;; + # Otherwise, we don't know. + *) gl_cv_func_link_follows_symlink=unknown ;; + esac + ]) rm -f conftest.file conftest.sym conftest.hard ]) - case $gl_cv_func_link_follows_symlink in - yes) gl_link_follows_symlinks=1 ;; - no) ;; # already defaulted to 0 + case "$gl_cv_func_link_follows_symlink" in + *yes) gl_link_follows_symlinks=1 ;; + *no) ;; # already defaulted to 0 *) gl_link_follows_symlinks=-2 ;; esac fi