summaryrefslogtreecommitdiffstats
path: root/m4/canonicalize.m4
diff options
context:
space:
mode:
Diffstat (limited to 'm4/canonicalize.m4')
-rw-r--r--m4/canonicalize.m4183
1 files changed, 183 insertions, 0 deletions
diff --git a/m4/canonicalize.m4 b/m4/canonicalize.m4
new file mode 100644
index 0000000..b55d5c0
--- /dev/null
+++ b/m4/canonicalize.m4
@@ -0,0 +1,183 @@
+# canonicalize.m4 serial 37
+
+dnl Copyright (C) 2003-2007, 2009-2022 Free Software Foundation, Inc.
+
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Provides canonicalize_file_name and canonicalize_filename_mode, but does
+# not provide or fix realpath.
+AC_DEFUN([gl_FUNC_CANONICALIZE_FILENAME_MODE],
+[
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
+ AC_CHECK_FUNCS_ONCE([canonicalize_file_name faccessat])
+ AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
+ AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
+ if test $ac_cv_func_canonicalize_file_name = no; then
+ HAVE_CANONICALIZE_FILE_NAME=0
+ else
+ case "$gl_cv_func_realpath_works" in
+ *yes) ;;
+ *) REPLACE_CANONICALIZE_FILE_NAME=1 ;;
+ esac
+ fi
+])
+
+# Provides canonicalize_file_name and realpath.
+AC_DEFUN([gl_CANONICALIZE_LGPL],
+[
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ AC_REQUIRE([gl_CANONICALIZE_LGPL_SEPARATE])
+ if test $ac_cv_func_canonicalize_file_name = no; then
+ HAVE_CANONICALIZE_FILE_NAME=0
+ if test $ac_cv_func_realpath = no; then
+ HAVE_REALPATH=0
+ else
+ case "$gl_cv_func_realpath_works" in
+ *yes) ;;
+ *) REPLACE_REALPATH=1 ;;
+ esac
+ fi
+ else
+ case "$gl_cv_func_realpath_works" in
+ *yes)
+ ;;
+ *)
+ REPLACE_CANONICALIZE_FILE_NAME=1
+ REPLACE_REALPATH=1
+ ;;
+ esac
+ fi
+])
+
+# Like gl_CANONICALIZE_LGPL, except prepare for separate compilation
+# (no REPLACE_CANONICALIZE_FILE_NAME, no REPLACE_REALPATH, no AC_LIBOBJ).
+AC_DEFUN([gl_CANONICALIZE_LGPL_SEPARATE],
+[
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
+ AC_CHECK_FUNCS_ONCE([canonicalize_file_name faccessat])
+
+ dnl On native Windows, we use _getcwd(), regardless whether getcwd() is
+ dnl available through the linker option '-loldnames'.
+ AC_REQUIRE([AC_CANONICAL_HOST])
+ case "$host_os" in
+ mingw*) ;;
+ *) AC_CHECK_FUNCS([getcwd]) ;;
+ esac
+
+ AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
+ AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
+ AC_CHECK_HEADERS_ONCE([sys/param.h])
+])
+
+# Check whether realpath works. Assume that if a platform has both
+# realpath and canonicalize_file_name, but the former is broken, then
+# so is the latter.
+AC_DEFUN([gl_FUNC_REALPATH_WORKS],
+[
+ AC_CHECK_FUNCS_ONCE([realpath lstat])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether realpath works], [gl_cv_func_realpath_works], [
+ rm -rf conftest.a conftest.d
+ touch conftest.a
+ # Assume that if we have lstat, we can also check symlinks.
+ if test $ac_cv_func_lstat = yes; then
+ ln -s conftest.a conftest.l
+ fi
+ mkdir conftest.d
+ AC_RUN_IFELSE([
+ AC_LANG_PROGRAM([[
+ ]GL_NOCRASH[
+ #include <errno.h>
+ #include <stdlib.h>
+ #include <string.h>
+ ]], [[
+ int result = 0;
+ /* This test fails on Solaris 10. */
+ {
+ char *name = realpath ("conftest.a", NULL);
+ if (!(name && *name == '/'))
+ result |= 1;
+ free (name);
+ }
+ /* This test fails on older versions of Cygwin. */
+ {
+ char *name = realpath ("conftest.b/../conftest.a", NULL);
+ if (name != NULL)
+ result |= 2;
+ free (name);
+ }
+ /* This test fails on Cygwin 2.9. */
+ #if HAVE_LSTAT
+ {
+ char *name = realpath ("conftest.l/../conftest.a", NULL);
+ if (name != NULL || errno != ENOTDIR)
+ result |= 4;
+ free (name);
+ }
+ #endif
+ /* This test fails on Mac OS X 10.13, OpenBSD 6.0. */
+ {
+ char *name = realpath ("conftest.a/", NULL);
+ if (name != NULL)
+ result |= 8;
+ free (name);
+ }
+ /* This test fails on AIX 7, Solaris 10. */
+ {
+ char *name1 = realpath (".", NULL);
+ char *name2 = realpath ("conftest.d//./..", NULL);
+ if (! name1 || ! name2 || strcmp (name1, name2))
+ result |= 16;
+ free (name1);
+ free (name2);
+ }
+ #ifdef __linux__
+ /* On Linux, // is the same as /. See also double-slash-root.m4.
+ realpath() should respect this.
+ This test fails on musl libc 1.2.2. */
+ {
+ char *name = realpath ("//", NULL);
+ if (! name || strcmp (name, "/"))
+ result |= 32;
+ free (name);
+ }
+ #endif
+ return result;
+ ]])
+ ],
+ [gl_cv_func_realpath_works=yes],
+ [case $? in
+ 32) gl_cv_func_realpath_works=nearly ;;
+ *) gl_cv_func_realpath_works=no ;;
+ esac
+ ],
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu* | gnu*) gl_cv_func_realpath_works="guessing yes" ;;
+ # Guess 'nearly' on musl systems.
+ *-musl*) gl_cv_func_realpath_works="guessing nearly" ;;
+ # Guess no on Cygwin.
+ cygwin*) gl_cv_func_realpath_works="guessing no" ;;
+ # Guess no on native Windows.
+ mingw*) gl_cv_func_realpath_works="guessing no" ;;
+ # If we don't know, obey --enable-cross-guesses.
+ *) gl_cv_func_realpath_works="$gl_cross_guess_normal" ;;
+ esac
+ ])
+ rm -rf conftest.a conftest.l conftest.d
+ ])
+ case "$gl_cv_func_realpath_works" in
+ *yes)
+ AC_DEFINE([FUNC_REALPATH_WORKS], [1],
+ [Define to 1 if realpath() can malloc memory, always gives an absolute path, and handles leading slashes and a trailing slash correctly.])
+ ;;
+ *nearly)
+ AC_DEFINE([FUNC_REALPATH_NEARLY_WORKS], [1],
+ [Define to 1 if realpath() can malloc memory, always gives an absolute path, and handles a trailing slash correctly.])
+ ;;
+ esac
+])