Guard GCC_DARN_ASM_AVAILABLE on GCC 4.0

The GCC inline assembler is available at GCC 3.2, but we check for 4.0 for expediency

1 files changed, 4 insertions, 1 deletions

diff --git a/darn.cpp b/darn.cpp
index 5c40ba78..0cc05687 100644
--- a/darn.cpp
+++ b/darn.cpp
@@ -14,7 +14,10 @@
 // Platforms that don't support GCC inline assembly or the builtin will fail

 // the compile.

 

-#if defined(__GNUC__) || defined(__IBM_GCC_ASM)

+// Inline assembler available in GCC 3.2 or above. For practical

+// purposes we check for GCC 4.0 or above. GCC imposters claim

+// to be GCC 4.2.1 so it will capture them, too.

+#if (__GNUC__ >= 4) || defined(__IBM_GCC_ASM)

 # define GCC_DARN_ASM_AVAILABLE 1

 #endif