swr rasterizer contains numerous data transfers between vectors
and ordinary C types. Fixing for strict aliasing will take time.
---
configure.ac | 7 +++++++
src/gallium/drivers/swr/Makefile.am | 1 +
2 files changed, 8 insertions(+)
diff --git a/configure.ac b/configure.ac
index aea5890..fb4a12a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -312,6 +312,8 @@ if test "x$GCC" = xyes; then
MSVC2013_COMPAT_CFLAGS="-Werror=pointer-arith"
MSVC2013_COMPAT_CXXFLAGS="-Werror=pointer-arith"
+ NO_STRICT_ALIASING_CFLAGS="-fno-strict-aliasing"
+
# Enable -Werror=vla if compiler supports it
save_CFLAGS="$CFLAGS"
AC_MSG_CHECKING([whether $CC supports -Werror=vla])
@@ -341,11 +343,16 @@ if test "x$GXX" = xyes; then
# We don't want floating-point math functions to set errno or trap
CXXFLAGS="$CXXFLAGS -fno-math-errno -fno-trapping-math"
+
+ NO_STRICT_ALIASING_CXXFLAGS="-fno-strict-aliasing"
fi
AC_SUBST([MSVC2013_COMPAT_CFLAGS])
AC_SUBST([MSVC2013_COMPAT_CXXFLAGS])
+AC_SUBST([NO_STRICT_ALIASING_CFLAGS])
+AC_SUBST([NO_STRICT_ALIASING_CXXFLAGS])
+
dnl even if the compiler appears to support it, using visibility attributes
isn't
dnl going to do anything useful currently on cygwin apart from emit lots of
warnings
case "$host_os" in
diff --git a/src/gallium/drivers/swr/Makefile.am
b/src/gallium/drivers/swr/Makefile.am
index 3459af3..fa02349 100644
--- a/src/gallium/drivers/swr/Makefile.am
+++ b/src/gallium/drivers/swr/Makefile.am
@@ -29,6 +29,7 @@ noinst_LTLIBRARIES = libmesaswr.la
libmesaswr_la_SOURCES = $(LOADER_SOURCES)
COMMON_CXXFLAGS = \
+ $(NO_STRICT_ALIASING_CXXFLAGS) \
$(GALLIUM_DRIVER_CFLAGS) \
$(LLVM_CXXFLAGS) \
$(SWR_CXX11_CXXFLAGS) \
--
2.7.4
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