fix: macos fixes

Author: manid2

cpp/Makefile

@@ -9,6 +9,15 @@ all: tests check
 include ../mk/common.mk
 
 CXX = /usr/bin/g++
+
+SYS_NAME:=$(shell uname -s)
+IS_CYGWIN:=$(findstring CYGWIN, $(SYS_NAME))
+IS_MACOS:=$(findstring Darwin, $(SYS_NAME))
+
+ifeq ($(IS_MACOS), Darwin)
+  CXX = /usr/local/bin/g++
+endif
+
 MIN_GPP_VERSION=13
 GPP_VERSION:=$(shell $(CXX) -dumpfullversion | cut -d. -f1)
 CHECK_GPP_VERSION:=$(shell expr "$(GPP_VERSION)" ">=" "$(MIN_GPP_VERSION)")
@@ -20,9 +29,6 @@ endif
 
 CXXFLAGS = -std=c++20 -Wall -Wextra -Wpedantic -Werror -Iincludes
 
-SYS_NAME:=$(shell uname -s)
-IS_CYGWIN:=$(findstring CYGWIN, $(SYS_NAME))
-
 ifeq ($(IS_CYGWIN), CYGWIN)
   CXXFLAGS += -static-libstdc++
 endif