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-rwxr-xr-xSConstruct16
1 files changed, 16 insertions, 0 deletions
diff --git a/SConstruct b/SConstruct
index 6a44f3a94..d5f56b22a 100755
--- a/SConstruct
+++ b/SConstruct
@@ -580,6 +580,22 @@ if main['GCC']:
main['GCC_VERSION'] = gcc_version
+ # gcc from version 4.8 and above generates "rep; ret" instructions
+ # to avoid performance penalties on certain AMD chips. Older
+ # assemblers detect this as an error, "Error: expecting string
+ # instruction after `rep'"
+ if compareVersions(gcc_version, "4.8") > 0:
+ as_version = readCommand([main['AS'], '-v', '/dev/null'],
+ exception=False).split()
+
+ if not as_version or compareVersions(as_version[-1], "2.23") < 0:
+ print termcap.Yellow + termcap.Bold + \
+ 'Warning: This combination of gcc and binutils have' + \
+ ' known incompatibilities.\n' + \
+ ' If you encounter build problems, please update ' + \
+ 'binutils to 2.23.' + \
+ termcap.Normal
+
# Add the appropriate Link-Time Optimization (LTO) flags
# unless LTO is explicitly turned off. Note that these flags
# are only used by the fast target.