X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=src%2FCompiler.h;h=38c008f4bbe66e515d5366788b4493073cc6a382;hb=3af5c3a185fc23b8fb9d528a9c0a14f70093ac70;hp=a3a48118aae3d8b4578085f104c962ce8df2babd;hpb=a90450bc099218c49c122744bbd52f21a0d7bb7c;p=ncmpc.git

diff --git a/src/Compiler.h b/src/Compiler.h
index a3a4811..38c008f 100644
--- a/src/Compiler.h
+++ b/src/Compiler.h
@@ -20,10 +20,6 @@
 #ifndef COMPILER_H
 #define COMPILER_H
 
-#define GCC_CHECK_VERSION(major, minor) \
-  (defined(__GNUC__) &&                                                 \
-   (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor))))
-
 #define GCC_MAKE_VERSION(major, minor, patchlevel) ((major) * 10000 + (minor) * 100 + patchlevel)
 
 #ifdef __GNUC__
@@ -38,7 +34,30 @@
 #  define CLANG_VERSION 0
 #endif
 
-#if GCC_CHECK_VERSION(4,0)
+/**
+ * Are we building with the specified version of gcc (not clang or any
+ * other compiler) or newer?
+ */
+#define GCC_CHECK_VERSION(major, minor) \
+  (!CLANG_VERSION && \
+   GCC_VERSION >= GCC_MAKE_VERSION(major, minor, 0))
+
+/**
+ * Are we building with clang (any version) or at least the specified
+ * gcc version?
+ */
+#define CLANG_OR_GCC_VERSION(major, minor) \
+  (CLANG_VERSION || GCC_CHECK_VERSION(major, minor))
+
+/**
+ * Are we building with gcc (not clang or any other compiler) and a
+ * version older than the specified one?
+ */
+#define GCC_OLDER_THAN(major, minor) \
+  (GCC_VERSION && !CLANG_VERSION && \
+   GCC_VERSION < GCC_MAKE_VERSION(major, minor, 0))
+
+#if CLANG_OR_GCC_VERSION(4,0)
 
 /* GCC 4.x */
 
@@ -98,7 +117,7 @@
 
 #endif
 
-#if GCC_CHECK_VERSION(4,3)
+#if CLANG_OR_GCC_VERSION(4,3)
 
 #define gcc_hot __attribute__((hot))
 #define gcc_cold __attribute__((cold))
@@ -110,7 +129,7 @@
 
 #endif /* ! GCC_UNUSED >= 40300 */
 
-#if GCC_CHECK_VERSION(4,6) && !defined(__clang__)
+#if GCC_CHECK_VERSION(4,6)
 #define gcc_flatten __attribute__((flatten))
 #else
 #define gcc_flatten
@@ -119,7 +138,7 @@
 #ifndef __cplusplus
 /* plain C99 has "restrict" */
 #define gcc_restrict restrict
-#elif GCC_CHECK_VERSION(4,0)
+#elif CLANG_OR_GCC_VERSION(4,0)
 /* "__restrict__" is a GCC extension for C++ */
 #define gcc_restrict __restrict__
 #else
@@ -132,12 +151,12 @@
 #if defined(__cplusplus)
 
 /* support for C++11 "override" was added in gcc 4.7 */
-#if !defined(__clang__) && !GCC_CHECK_VERSION(4,7)
+#if GCC_OLDER_THAN(4,7)
 #define override
 #define final
 #endif
 
-#if defined(__clang__) || GCC_CHECK_VERSION(4,8)
+#if CLANG_OR_GCC_VERSION(4,8)
 #define gcc_alignas(T, fallback) alignas(T)
 #else
 #define gcc_alignas(T, fallback) gcc_aligned(fallback)