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Add the "-fno-tree-vrp" option when building with GCC4. It seems that the

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value range propagation optimization results in broken code with the GCC4
version we are currently using. Added TODO to retest/remove this flag when we
update our GCC4 compiler.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25054 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Michael Lotz
2008-04-19 17:12:47 +00:00
parent 39399f65f0
commit de39891a3c
1 changed files with 9 additions and 3 deletions
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build/jam/BuildSetup
+9 -3
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@@ -156,10 +156,16 @@ if $(HAIKU_USE_GCC_PIPE) = 1 {
HAIKU_GCC_BASE_FLAGS = -pipe ;
}
# disable strict aliasing on anything newer than gcc 2 as it may lead to unexpected results.
# TODO: remove this when all code has been analyzed/fixed with regard to aliasing.
# disable strict aliasing on anything newer than gcc 2 as it may lead to
# unexpected results. also disable the tree-vrp (value range propagation)
# optimization for now as with the current gcc4 version we are using this
# results in some broken code.
# TODO: remove the -fno-strict-aliasing option when all code has been
# analyzed/fixed with regard to aliasing.
# TODO: retest/remove the -fno-tree-vrp option as soon as we have updated our
# gcc4 compiler.
if $(HAIKU_GCC_VERSION[1]) >= 3 {
HAIKU_GCC_BASE_FLAGS += -fno-strict-aliasing ;
HAIKU_GCC_BASE_FLAGS += -fno-strict-aliasing -fno-tree-vrp ;
}
# override gcc 2.95.3's header directory -- strictly necessary only when using