Adjust Mac OS non-arm build for upgraded abseil (#416)

* Update and rename ubuntu-18.04-compile.yml to ubuntu-compile.yml

* Update ubuntu-compile.yml

segregate output binaries

* Update macos-10.15-compile.yml

Add testnet branch to github action and compilation flag -std=c++17

* Update macos-10.15-compile.yml

remove branch filter

* Update windows2019x64-compile.yml

* Update windows2019x64-compile.yml

add flag /std:c++17

* Update windows2019x64-compile.yml

* Update windows2019x64-compile.yml

* Update ubuntu-compile.yml

Add  -DCMAKE_CXX_FLAGS="-std=c++17"

* use CMAKE_CXX_STANDARD

* Update macos-10.15-compile.yml

remove -std=c++17 flag

* Update ubuntu-compile.yml

remove -DCMAKE_CXX_FLAGS="-std=c++17" flag

* Update ubuntu-compile.yml

remove space

* Update ubuntu-18.04-ton-ccpcheck.yml

remove branch filter

* Update docker-ubuntu-image.yml

remove branch filter

Co-authored-by: dungeon-master-666 <dungeon666master@protonmail.com>

.github/workflows/docker-ubuntu-image.yml

@@ -3,8 +3,6 @@ name: Docker Ubuntu 18.04 image
 on:
   workflow_dispatch:
   push:
-    branches:
-      - 'master'
 
 env:
   REGISTRY: ghcr.io

.github/workflows/macos-10.15-compile.yml

@@ -3,8 +3,6 @@ name: C/C++ CI macOS-10.15 Compile
 on:
   workflow_dispatch:
   push:
-    branches:
-      - 'master'
 
 jobs:
   build:

.github/workflows/ubuntu-18.04-ton-ccpcheck.yml

@@ -3,8 +3,6 @@ name: Ubuntu 18.04 TON ccpcheck
 on:
   workflow_dispatch:
   push:
-    branches:
-      - 'master'
 
 jobs:
   build:

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.0.2 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
 
 project(TON VERSION 0.5 LANGUAGES C CXX)
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
@@ -79,6 +79,10 @@ else()
   set(HAVE_SSE42 FALSE)
 endif()
 
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD_REQUIRED TRUE)
+set(CMAKE_CXX_EXTENSIONS FALSE)
+
 #BEGIN internal
 option(TON_ONLY_TONLIB "Use \"ON\" to build only tonlib." OFF)
 if (TON_ONLY_TONLIB)
@@ -99,6 +103,7 @@ set(TON_ARCH "native" CACHE STRING "Architecture, will be passed to -march=")
 
 if (TON_USE_ABSEIL)
   message("Add abseil-cpp")
+  set(ABSL_PROPAGATE_CXX_STD TRUE)
   add_subdirectory(third-party/abseil-cpp EXCLUDE_FROM_ALL)
   set(ABSL_FOUND 1)
 endif()
@@ -178,26 +183,6 @@ endif()
 
 include(CheckCXXCompilerFlag)
 
-if (GCC OR CLANG OR INTEL)
-  if (WIN32 AND INTEL)
-    set(STD14_FLAG /Qstd=c++14)
-  else()
-    set(STD14_FLAG -std=c++14)
-  endif()
-  check_cxx_compiler_flag(${STD14_FLAG} HAVE_STD14)
-  if (NOT HAVE_STD14)
-    string(REPLACE "c++14" "c++1y" STD14_FLAG "${STD14_FLAG}")
-    check_cxx_compiler_flag(${STD14_FLAG} HAVE_STD1Y)
-    set(HAVE_STD14 ${HAVE_STD1Y})
-  endif()
-elseif (MSVC)
-  set(HAVE_STD14 MSVC_VERSION>=1900)
-endif()
-
-if (NOT HAVE_STD14)
-  message(FATAL_ERROR "No C++14 support in the compiler. Please upgrade the compiler.")
-endif()
-
 set(CMAKE_THREAD_PREFER_PTHREAD ON)
 set(THREADS_PREFER_PTHREAD_FLAG ON)
 find_package(Threads REQUIRED)
@@ -238,7 +223,7 @@ if (MSVC)
   add_definitions(-D_SCL_SECURE_NO_WARNINGS -D_CRT_SECURE_NO_WARNINGS)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP /W4 /wd4100 /wd4127 /wd4324 /wd4456 /wd4457 /wd4458 /wd4505 /wd4702")
 elseif (CLANG OR GCC)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${STD14_FLAG} -fno-omit-frame-pointer")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-omit-frame-pointer")
   if (APPLE)
     #use "-Wl,-exported_symbols_list,${CMAKE_CURRENT_SOURCE_DIR}/export_list" for exported symbols
     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -fvisibility=hidden -Wl,-dead_strip,-x,-S")
@@ -251,8 +236,6 @@ elseif (CLANG OR GCC)
       set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--exclude-libs,ALL")
     endif()
   endif()
-elseif (INTEL)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${STD14_FLAG}")
 endif()
 
 if (WIN32)