From bff7ffbc5130cd46caf33b76b4bb0593fcd15066 Mon Sep 17 00:00:00 2001
From: Vladimir Glavnyy <31897320+vglavnyy@users.noreply.github.com>
Date: Fri, 10 May 2019 00:15:29 +0700
Subject: [PATCH] Add detection of strtoull_l function (#5333) (#5337)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Retrieved from:
https://github.com/google/flatbuffers/commit/bff7ffbc5130cd46caf33b76b4bb0593fcd15066]
---
 CMakeLists.txt | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0640c37b5..30be238fe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,12 +42,18 @@ if(DEFINED FLATBUFFERS_MAX_PARSING_DEPTH)
   message(STATUS "FLATBUFFERS_MAX_PARSING_DEPTH: ${FLATBUFFERS_MAX_PARSING_DEPTH}")
 endif()
 
-# Auto-detect locale-narrow 'strtod_l' function.
+# Auto-detect locale-narrow 'strtod_l' and  'strtoull_l' functions.
 if(NOT DEFINED FLATBUFFERS_LOCALE_INDEPENDENT)
+  set(FLATBUFFERS_LOCALE_INDEPENDENT 0)
   if(MSVC)
-    check_cxx_symbol_exists(_strtof_l stdlib.h FLATBUFFERS_LOCALE_INDEPENDENT)
+    check_cxx_symbol_exists(_strtof_l stdlib.h FLATBUFFERS_HAS_STRTOF_L)
+    check_cxx_symbol_exists(_strtoui64_l stdlib.h FLATBUFFERS_HAS_STRTOULL_L)
   else()
-    check_cxx_symbol_exists(strtof_l stdlib.h FLATBUFFERS_LOCALE_INDEPENDENT)
+    check_cxx_symbol_exists(strtof_l stdlib.h FLATBUFFERS_HAS_STRTOF_L)
+    check_cxx_symbol_exists(strtoull_l stdlib.h FLATBUFFERS_HAS_STRTOULL_L)
+  endif()
+  if(FLATBUFFERS_HAS_STRTOF_L AND FLATBUFFERS_HAS_STRTOULL_L)
+    set(FLATBUFFERS_LOCALE_INDEPENDENT 1)
   endif()
 endif()
 add_definitions(-DFLATBUFFERS_LOCALE_INDEPENDENT=$<BOOL:${FLATBUFFERS_LOCALE_INDEPENDENT}>)