build: COMP_XXX renamed to UNITS_COMP_XXX

src/include/units/bits/external/downcasting.h

@@ -74,7 +74,7 @@ enum class downcast_mode {
 
 template<typename Target, Downcastable T, downcast_mode mode = static_cast<downcast_mode>(UNITS_DOWNCAST_MODE)>
 struct downcast_dispatch : std::conditional_t<mode == downcast_mode::off, T,
-#ifdef COMP_MSVC
+#ifdef UNITS_COMP_MSVC
                                               downcast_child<Target, T>> {};
 #else
                                               std::conditional_t<mode == downcast_mode::automatic && has_downcast_guide<T>,

src/include/units/bits/external/hacks.h

@@ -23,15 +23,15 @@
 #pragma once
 
 #if __clang__
-#define COMP_CLANG __clang_major__
+#define UNITS_COMP_CLANG __clang_major__
 #elif __GNUC__
-#define COMP_GCC __GNUC__
-#define COMP_GCC_MINOR __GNUC_MINOR__
+#define UNITS_COMP_GCC __GNUC__
+#define UNITS_COMP_GCC_MINOR __GNUC_MINOR__
 #elif _MSC_VER
-#define COMP_MSVC _MSC_VER
+#define UNITS_COMP_MSVC _MSC_VER
 #endif
 
-#if COMP_CLANG
+#if UNITS_COMP_CLANG
 
 #include <ciso646>
 #if _LIBCPP_VERSION
@@ -40,7 +40,7 @@
 
 #endif
 
-#if COMP_CLANG == 12 && UNITS_LIBCXX
+#if UNITS_COMP_CLANG == 12 && UNITS_LIBCXX
 
 #include <concepts/compare.hpp>
 #include <concepts/concepts.hpp>
@@ -55,7 +55,7 @@
 #include <concepts>
 #include <compare>
 
-#if COMP_MSVC || COMP_CLANG
+#if UNITS_COMP_MSVC || UNITS_COMP_CLANG
 
 #define TYPENAME typename
 
@@ -68,12 +68,12 @@
 
 namespace std {
 
-#if COMP_GCC
+#if UNITS_COMP_GCC
 
 template<class T>
 concept default_constructible = constructible_from<T>;
 
-#elif COMP_CLANG && UNITS_LIBCXX
+#elif UNITS_COMP_CLANG && UNITS_LIBCXX
 
 // concepts
 using concepts::common_with;

src/include/units/quantity.h

@@ -357,7 +357,7 @@ public:
 
   [[nodiscard]] friend constexpr auto operator<=>(const quantity& lhs, const quantity& rhs)
     requires std::three_way_comparable<rep>
-#if COMP_GCC == 10 && COMP_GCC_MINOR >= 2
+#if UNITS_COMP_GCC == 10 && UNITS_COMP_GCC_MINOR >= 2
   = default;
 #else
   {