[PATCH][PR sanitizer/86090] Add checks for lstat and readlink to sanitizer configure.

[Denis Khalikov <d dot khalikov at partner dot samsung dot com>]

Hello,
this is a patch for PR sanitizer/86090
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86090
Thanks.

From: Denis Khalikov <d.khalikov@partner.samsung.com>
Date: Fri, 8 Jun 2018 19:53:01 +0300
Subject: [PATCH] PR sanitizer/86090

* configure.ac: Check for lstat and readlink.
* configure, config.h.in: Rebuild.
---
 libsanitizer/ChangeLog    | 6 ++++++
 libsanitizer/config.h.in  | 6 ++++++
 libsanitizer/configure    | 2 +-
 libsanitizer/configure.ac | 2 +-
 4 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/libsanitizer/ChangeLog b/libsanitizer/ChangeLog
index 43eb1de..4c669dd 100644
--- a/libsanitizer/ChangeLog
+++ b/libsanitizer/ChangeLog
@@ -1,3 +1,9 @@
+2018-06-08  Denis Khalikov  <d.khalikov@partner.samsung.com>
+
+        PR sanitizer/86090
+        * configure.ac: Check for lstat and readlink.
+        * configure, config.h.in: Rebuild.
+
 2018-05-31  Matthias Klose  <doko@ubuntu.com>
 
 	PR sanitizer/86012
diff --git a/libsanitizer/config.h.in b/libsanitizer/config.h.in
index 7195840..f716c24 100644
--- a/libsanitizer/config.h.in
+++ b/libsanitizer/config.h.in
@@ -43,6 +43,12 @@
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 
+/* Define to 1 if you have the `lstat' function. */
+#undef HAVE_LSTAT
+
+/* Define to 1 if you have the `readlink' function. */
+#undef HAVE_READLINK
+
 /* Define to 1 if you have the <rpc/xdr.h> header file. */
 #undef HAVE_RPC_XDR_H
 
diff --git a/libsanitizer/configure b/libsanitizer/configure
index 4695bc7..5836450 100755
--- a/libsanitizer/configure
+++ b/libsanitizer/configure
@@ -15509,7 +15509,7 @@ fi
 
 
 # Check for functions needed.
-for ac_func in clock_getres clock_gettime clock_settime
+for ac_func in clock_getres clock_gettime clock_settime lstat readlink
 do :
   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
 ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
diff --git a/libsanitizer/configure.ac b/libsanitizer/configure.ac
index 0d11afd..34ba09f 100644
--- a/libsanitizer/configure.ac
+++ b/libsanitizer/configure.ac
@@ -93,7 +93,7 @@ AM_CONDITIONAL(TSAN_SUPPORTED, [test "x$TSAN_SUPPORTED" = "xyes"])
 AM_CONDITIONAL(LSAN_SUPPORTED, [test "x$LSAN_SUPPORTED" = "xyes"])
 
 # Check for functions needed.
-AC_CHECK_FUNCS(clock_getres clock_gettime clock_settime)
+AC_CHECK_FUNCS(clock_getres clock_gettime clock_settime lstat readlink)
 
 # Common libraries that we need to link against for all sanitizer libs.
 link_sanitizer_common='-lpthread -lm'
-- 
1.9.1