Fix warnings for functions introduced in Android API level 16.

* m4/faccessat.m4 (gl_FUNC_FACCESSAT): Test for faccessat using
gl_CHECK_FUNCS_ANDROID instead of AC_CHECK_FUNCS_ONCE.
* m4/canonicalize.m4 (gl_FUNC_CANONICALIZE_FILENAME_MODE,
gl_CANONICALIZE_LGPL_SEPARATE): Likewise.
* m4/euidaccess.m4 (gl_PREREQ_EUIDACCESS): Likewise.
* m4/tsearch.m4 (gl_FUNC_TSEARCH): Test for tsearch using
gl_CHECK_FUNCS_ANDROID instead of AC_CHECK_FUNCS.
* m4/setenv.m4 (gl_PREREQ_SETENV): Likewise.

5 files changed, 14 insertions, 11 deletions

diff --git a/m4/canonicalize.m4 b/m4/canonicalize.m4
index 03cb0aec93..d319645fd3 100644
--- a/m4/canonicalize.m4
+++ b/m4/canonicalize.m4
@@ -1,4 +1,4 @@
-# canonicalize.m4 serial 37
+# canonicalize.m4 serial 38
 
 dnl Copyright (C) 2003-2007, 2009-2023 Free Software Foundation, Inc.
 
@@ -12,7 +12,8 @@ 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_CHECK_FUNCS_ONCE([canonicalize_file_name])
+  gl_CHECK_FUNCS_ANDROID([faccessat], [[#include <unistd.h>]])
   AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
   AC_REQUIRE([gl_FUNC_REALPATH_WORKS])
   if test $ac_cv_func_canonicalize_file_name = no; then
@@ -58,7 +59,8 @@ 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])
+  AC_CHECK_FUNCS_ONCE([canonicalize_file_name])
+  gl_CHECK_FUNCS_ANDROID([faccessat], [[#include <unistd.h>]])
 
   dnl On native Windows, we use _getcwd(), regardless whether getcwd() is
   dnl available through the linker option '-loldnames'.
diff --git a/m4/euidaccess.m4 b/m4/euidaccess.m4
index f0eb5bde84..7429779c15 100644
--- a/m4/euidaccess.m4
+++ b/m4/euidaccess.m4
@@ -1,4 +1,4 @@
-# euidaccess.m4 serial 16
+# euidaccess.m4 serial 17
 dnl Copyright (C) 2002-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -32,7 +32,7 @@ AC_DEFUN([gl_FUNC_EUIDACCESS],
 # Prerequisites of lib/euidaccess.c.
 AC_DEFUN([gl_PREREQ_EUIDACCESS], [
   dnl Prefer POSIX faccessat over non-standard euidaccess.
-  AC_CHECK_FUNCS_ONCE([faccessat])
+  gl_CHECK_FUNCS_ANDROID([faccessat], [[#include <unistd.h>]])
   dnl Try various other non-standard fallbacks.
   AC_CHECK_HEADERS([libgen.h])
   AC_FUNC_GETGROUPS
diff --git a/m4/faccessat.m4 b/m4/faccessat.m4
index 934c1f4154..958c4978b7 100644
--- a/m4/faccessat.m4
+++ b/m4/faccessat.m4
@@ -1,4 +1,4 @@
-# serial 10
+# serial 11
 # See if we need to provide faccessat replacement.
 
 dnl Copyright (C) 2009-2023 Free Software Foundation, Inc.
@@ -16,7 +16,7 @@ AC_DEFUN([gl_FUNC_FACCESSAT],
   dnl Persuade glibc <unistd.h> to declare faccessat().
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
 
-  AC_CHECK_FUNCS_ONCE([faccessat])
+  gl_CHECK_FUNCS_ANDROID([faccessat], [[#include <unistd.h>]])
   if test $ac_cv_func_faccessat = no; then
     HAVE_FACCESSAT=0
   else
diff --git a/m4/setenv.m4 b/m4/setenv.m4
index 16f9eb5531..c0b7475606 100644
--- a/m4/setenv.m4
+++ b/m4/setenv.m4
@@ -1,4 +1,4 @@
-# setenv.m4 serial 30
+# setenv.m4 serial 31
 dnl Copyright (C) 2001-2004, 2006-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -155,7 +155,7 @@ AC_DEFUN([gl_PREREQ_SETENV],
   AC_REQUIRE([gl_ENVIRON])
   AC_CHECK_HEADERS_ONCE([unistd.h])
   AC_CHECK_HEADERS([search.h])
-  AC_CHECK_FUNCS([tsearch])
+  gl_CHECK_FUNCS_ANDROID([tsearch], [[#include <search.h>]])
 ])
 
 # Prerequisites of lib/unsetenv.c.
diff --git a/m4/tsearch.m4 b/m4/tsearch.m4
index d24b2ca4a5..8e6a894f83 100644
--- a/m4/tsearch.m4
+++ b/m4/tsearch.m4
@@ -1,4 +1,4 @@
-# tsearch.m4 serial 8
+# tsearch.m4 serial 9
 dnl Copyright (C) 2006-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,7 +7,8 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_TSEARCH],
 [
   AC_REQUIRE([gl_SEARCH_H_DEFAULTS])
-  AC_CHECK_FUNCS([tsearch twalk])
+  AC_CHECK_FUNCS([twalk])
+  gl_CHECK_FUNCS_ANDROID([tsearch], [[#include <search.h>]])
   if test $ac_cv_func_tsearch = yes; then
     dnl On OpenBSD 4.0, the return value of tdelete() is incorrect.
     AC_REQUIRE([AC_PROG_CC])