Changeset f8e8738 in mainline for kernel/arch/amd64/Makefile.inc

Timestamp:

2011-04-07T20:22:40Z (13 years ago)

Author:

Lubos Slovak <lubos.slovak@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

fee6381

Parents:

61257f4 (diff), a82889e (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Changes from development

File:

• kernel/arch/amd64/Makefile.inc (modified) (1 diff)

kernel/arch/amd64/Makefile.inc

@@ -33 +33 @@
 
 FPU_NO_CFLAGS = -mno-sse -mno-sse2
-CMN1 = -m64 -mcmodel=large -mno-red-zone -fno-unwind-tables -fno-omit-frame-pointer
+
+#
+# FIXME:
+#
+# The -fno-optimize-sibling-calls should be removed as soon as a bug
+# in GCC concerning the "large" memory model and tail call optimization
+# is fixed.
+#
+# If GCC generates a code for tail call, instead of generating ..
+#
+#   jmp *fnc
+#
+# it generates an assembly code with an illegal immediate prefix:
+#
+#   jmp *$fnc
+#
+
+CMN1 = -m64 -mcmodel=large -mno-red-zone -fno-unwind-tables -fno-omit-frame-pointer -fno-optimize-sibling-calls
 GCC_CFLAGS += $(CMN1)
 ICC_CFLAGS += $(CMN1)