From ff8a9ea831b09e7d200f94256d6394e8b2b3ee7a Mon Sep 17 00:00:00 2001
From: Dzmitry Neviadomski <nevack.d@gmail.com>
Date: Sun, 8 Aug 2021 19:36:16 +0300
Subject: [PATCH] Add `-Wall` compiler flag to Clang compilers.

Use CMAKE's `CMAKE_<LANG>_COMPILER_ID`, available from 3.0.2.
See: https://cmake.org/cmake/help/latest/variable/CMAKE_LANG_COMPILER_ID.html
---
 CMakeLists.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 309f000b..b472fc5d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -45,8 +45,11 @@ endif()
 add_definitions(-DHAVE_CONFIG_H)
 set(TESTS_DIR "${CMAKE_CURRENT_SOURCE_DIR}/tests/")
 
-if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
+if(CMAKE_C_COMPILER_ID MATCHES "^(GNU|Clang|AppleClang)$")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
+endif()
+
+if(CMAKE_CXX_COMPILER_ID MATCHES "^(GNU|Clang|AppleClang)$")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
 endif()