+2018-05-13 Bruno Haible <bruno@clisp.org>
+
+ ffs: Fix compilation error on Android.
+ * m4/ffs.m4 (gl_FUNC_FFS): Use AC_LINK_IFELSE instead of AC_CHECK_FUNC.
+
2018-05-13 Bruno Haible <bruno@clisp.org>
mkfifo: Fix compilation error on Android.
-# ffs.m4 serial 2
+# ffs.m4 serial 3
dnl Copyright (C) 2011-2018 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
AC_DEFUN([gl_FUNC_FFS],
[
AC_REQUIRE([gl_HEADER_STRINGS_H_DEFAULTS])
- AC_CHECK_FUNCS_ONCE([ffs])
- if test $ac_cv_func_ffs = no; then
+
+ dnl We can't use AC_CHECK_FUNC here, because ffs() is defined as a
+ dnl static inline function when compiling for Android 4.2 or older.
+ AC_CACHE_CHECK([for ffs], [gl_cv_func_ffs],
+ [AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <strings.h>
+ int x;
+ ]],
+ [[return ffs(x);]])
+ ],
+ [gl_cv_func_ffs=yes],
+ [gl_cv_func_ffs=no])
+ ])
+ if test $gl_cv_func_ffs = no; then
HAVE_FFS=0
fi
])