We fail to pass to $(AS) all of the different flags that may be required
for a given set of CFLAGS. Rather than figuring out the host-specific
mapping, it's better to allow the compiler driver to do that.
However, simply using $(CC) runs afoul of clang trying to build the
option roms. C.f. 3dd46c78525a30e98c68, wherein we changed from
using $(CC) to using $(AS) in the first place.
Work around this by passing -fno-integrated-as to clang, so that we use
the external assembler, and the clang driver still passes along all of
the options that the assembler might require.
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
Signed-off-by: Richard Henderson <r...@twiddle.net>
Message-Id: <1466703558-7723-1-git-send-email-...@twiddle.net>
---
configure | 13 ++++++++++---
rules.mak | 7 ++-----
2 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/configure b/configure
index 67beb47..e9090a0 100755
--- a/configure
+++ b/configure
@@ -368,7 +368,7 @@ else
fi
ar="${AR-${cross_prefix}ar}"
-as="${AS-${cross_prefix}as}"
+ccas="${CCAS-$cc}"
cpp="${CPP-$cc -E}"
objcopy="${OBJCOPY-${cross_prefix}objcopy}"
ld="${LD-${cross_prefix}ld}"
@@ -4490,6 +4490,13 @@ if test "$fortify_source" != "no"; then
fi
fi
+#################################################
+# clang does not support the 16-bit assembly for roms
+
+if echo | $ccas -dM -E - | grep __clang__ > /dev/null 2>&1 ; then
+ ccas="$ccas -fno-integrated-as"
+fi
+
##########################################
# check if struct fsxattr is available via linux/fs.h
@@ -5508,7 +5515,7 @@ echo "CXX=$cxx" >> $config_host_mak
echo "OBJCC=$objcc" >> $config_host_mak
echo "AR=$ar" >> $config_host_mak
echo "ARFLAGS=$ARFLAGS" >> $config_host_mak
-echo "AS=$as" >> $config_host_mak
+echo "CCAS=$ccas" >> $config_host_mak
echo "CPP=$cpp" >> $config_host_mak
echo "OBJCOPY=$objcopy" >> $config_host_mak
echo "LD=$ld" >> $config_host_mak
@@ -5981,7 +5988,7 @@ for rom in seabios vgabios ; do
config_mak=roms/$rom/config.mak
echo "# Automatically generated by configure - do not modify" > $config_mak
echo "SRC_PATH=$source_path/roms/$rom" >> $config_mak
- echo "AS=$as" >> $config_mak
+ echo "CCAS=$ccas" >> $config_mak
echo "CC=$cc" >> $config_mak
echo "BCC=bcc" >> $config_mak
echo "CPP=$cpp" >> $config_mak
diff --git a/rules.mak b/rules.mak
index 72c5955..7d7d83b 100644
--- a/rules.mak
+++ b/rules.mak
@@ -68,11 +68,8 @@ LINK = $(call quiet-command, $(LINKPROG) $(QEMU_CFLAGS)
$(CFLAGS) $(LDFLAGS) -o
$(call process-archive-undefs, $1) \
$(version-obj-y) $(call extract-libs,$1) $(LIBS)," LINK
$(TARGET_DIR)$@")
-%.asm: %.S
- $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS)
$(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<," CPP $(TARGET_DIR)$@")
-
-%.o: %.asm
- $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<," AS
$(TARGET_DIR)$@")
+%.o: %.S
+ $(call quiet-command,$(CCAS) $(QEMU_INCLUDES) $(QEMU_CFLAGS)
$(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," AS $(TARGET_DIR)$@")
%.o: %.cc
$(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS)
$(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CXX $(TARGET_DIR)$@")
--
2.7.4
