Compile everything with -fno-builtin, so as to disable LLVM's
idiom-recognition optimisation. This identifies memset-style
loops and turns them into calls to memset, which in this case
leads to infinite recursion because it does this transformations
in VG_(memset), which is called from memset(), which we also define.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12065 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/Makefile.all.am b/Makefile.all.am
index 513b810..fe6fccd 100644
--- a/Makefile.all.am
+++ b/Makefile.all.am
@@ -80,6 +80,8 @@
# Baseline flags for all compilations. Aim here is to maximise
# performance and get whatever useful warnings we can out of gcc.
+# -fno-builtin is important for defeating LLVM's idiom recognition
+# that somehow causes VG_(memset) to get into infinite recursion.
AM_CFLAGS_BASE = \
-O2 -g \
-Wall \
@@ -89,7 +91,8 @@
-Wstrict-prototypes \
-Wmissing-declarations \
@FLAG_W_NO_FORMAT_ZERO_LENGTH@ \
- -fno-strict-aliasing
+ -fno-strict-aliasing \
+ -fno-builtin
# These flags are used for building the preload shared objects.
# The aim is to give reasonable performance but also to have good
@@ -97,9 +100,11 @@
# into (and through) the preloads.
if VGCONF_OS_IS_DARWIN
AM_CFLAGS_PIC = -dynamic -O -g -fno-omit-frame-pointer -fno-strict-aliasing \
- -mno-dynamic-no-pic -fpic -fPIC
+ -mno-dynamic-no-pic -fpic -fPIC \
+ -fno-builtin
else
-AM_CFLAGS_PIC = -fpic -O -g -fno-omit-frame-pointer -fno-strict-aliasing
+AM_CFLAGS_PIC = -fpic -O -g -fno-omit-frame-pointer -fno-strict-aliasing \
+ -fno-builtin
endif