From fa953f15bfcf95df9aa9c91e1c4b56a205f4d1ae Mon Sep 17 00:00:00 2001
From: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>
Date: Mon, 15 May 2023 15:03:30 +0200
Subject: build: Bump minimum supported GCC to g++-9

Also, update the code to use constexpr, which does not work in g++-8.

Also, drop the no longer needed build-aux/m4/l_filesystem.m4.
---
 build-aux/m4/l_filesystem.m4 | 38 --------------------------------------
 1 file changed, 38 deletions(-)
 delete mode 100644 build-aux/m4/l_filesystem.m4

(limited to 'build-aux/m4')

diff --git a/build-aux/m4/l_filesystem.m4 b/build-aux/m4/l_filesystem.m4
deleted file mode 100644
index 7e577f7ae5..0000000000
--- a/build-aux/m4/l_filesystem.m4
+++ /dev/null
@@ -1,38 +0,0 @@
-dnl Copyright (c) 2022 The Bitcoin Core developers
-dnl Distributed under the MIT software license, see the accompanying
-dnl file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-# GCC 8.1 and earlier requires -lstdc++fs
-
-m4_define([_CHECK_FILESYSTEM_testbody], [[
-  #include <filesystem>
-
-  namespace fs = std::filesystem;
-
-  int main() {
-    (void)fs::current_path().root_name();
-    return 0;
-  }
-]])
-
-AC_DEFUN([CHECK_FILESYSTEM], [
-
-  AC_LANG_PUSH(C++)
-
-  AC_MSG_CHECKING([whether std::filesystem can be used without link library])
-
-  AC_LINK_IFELSE([AC_LANG_SOURCE([_CHECK_FILESYSTEM_testbody])],[
-      AC_MSG_RESULT([yes])
-    ],[
-      AC_MSG_RESULT([no])
-      LIBS="$LIBS -lstdc++fs"
-      AC_MSG_CHECKING([whether std::filesystem needs -lstdc++fs])
-      AC_LINK_IFELSE([AC_LANG_SOURCE([_CHECK_FILESYSTEM_testbody])],[
-          AC_MSG_RESULT([yes])
-        ],[
-            AC_MSG_FAILURE([cannot figure out how to use std::filesystem])
-        ])
-    ])
-
-  AC_LANG_POP
-])
-- 
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