gbuild: AsmObject: support user defined AFLAGS

There does not seem to be a point to using CFLAGS here, usual convention
appears to be to use AFLAGS.  Not target local, since right now there is
no need for that.

Change-Id: I5d2f45777c226c0afc632adc21e446f09740d75d

config_host.mk.in

@@ -13,6 +13,7 @@ export SRC_ROOT=@SRC_ROOT@
 export BUILDDIR=@BUILDDIR@
 
 export ABOUT_BACKGROUND_SVG=@ABOUT_BACKGROUND_SVG@
+@x_AFLAGS@ export AFLAGS=@AFLAGS@
 export ALIGNOF_DOUBLE=@ALIGNOF_DOUBLE@
 export ALIGNOF_INT=@ALIGNOF_INT@
 export ALIGNOF_LONG=@ALIGNOF_LONG@

configure.ac

@@ -3398,8 +3398,17 @@ else
 fi
 AC_SUBST(ENABLE_SYMBOLS)
 
-dnl Check for explicit C/CXX/OBJC/OBJCXX/LDFLAGS. We by default use the ones specified
-dnl by our build system, but explicit override is possible.
+# Check for explicit A/C/CXX/OBJC/OBJCXX/LDFLAGS.
+# By default use the ones specified by our build system,
+# but explicit override is possible.
+AC_MSG_CHECKING(for explicit AFLAGS)
+if test -n "$AFLAGS"; then
+    AC_MSG_RESULT([$AFLAGS])
+    x_AFLAGS=
+else
+    AC_MSG_RESULT(no)
+    x_AFLAGS=[\#]
+fi
 AC_MSG_CHECKING(for explicit CFLAGS)
 if test -n "$CFLAGS"; then
     AC_MSG_RESULT([$CFLAGS])
@@ -3440,11 +3449,13 @@ else
     AC_MSG_RESULT(no)
     x_LDFLAGS=[\#]
 fi
+AC_SUBST(AFLAGS)
 AC_SUBST(CFLAGS)
 AC_SUBST(CXXFLAGS)
 AC_SUBST(OBJCFLAGS)
 AC_SUBST(OBJCXXFLAGS)
 AC_SUBST(LDFLAGS)
+AC_SUBST(x_AFLAGS)
 AC_SUBST(x_CFLAGS)
 AC_SUBST(x_CXXFLAGS)
 AC_SUBST(x_OBJCFLAGS)

solenv/gbuild/platform/com_GCC_class.mk

@@ -44,7 +44,7 @@ $(call gb_Output_announce,$(2),$(true),ASM,3)
 $(call gb_Helper_abbreviate_dirs,\
 	mkdir -p $(dir $(1)) $(dir $(4)) && cd $(SRCDIR) && \
 	$(gb_CC) \
-		$(T_CFLAGS) \
+		$(gb_AFLAGS) \
 		-c $(3) \
 		-o $(1)) \
 		$(INCLUDE) && \

solenv/gbuild/platform/com_GCC_defs.mk

@@ -54,6 +54,8 @@ gb_CCVER := $(shell $(gb_CC) -dumpversion | $(gb_AWK) -F. -- '{ print $$1*10000+
 
 gb_CPPU_ENV := gcc3
 
+gb_AFLAGS := $(AFLAGS)
+
 gb_COMPILERDEFS := \
 	-D$(COM) \
 	-DCPPU_ENV=$(gb_CPPU_ENV) \

solenv/gbuild/platform/com_MSC_class.mk

@@ -149,7 +149,7 @@ define gb_AsmObject__command
 $(call gb_Output_announce,$(2),$(true),ASM,3)
 $(call gb_Helper_abbreviate_dirs,\
 	mkdir -p $(dir $(1)) $(dir $(4)) && \
-	"$(ML_EXE)" $(gb_AFLAGS) -D$(COM) /Fo$(1) $(3)) && \
+	"$(ML_EXE)" /c /Cp $(gb_AFLAGS) -D$(COM) /Fo$(1) $(3)) && \
 	echo "$(1) : $(3)" > $(4)
 endef
 

solenv/gbuild/platform/com_MSC_defs.mk

@@ -67,7 +67,7 @@ gb_RCDEFS := \
 gb_RCFLAGS := \
 	 -V
 
-gb_AFLAGS := /c /Cp
+gb_AFLAGS := $(AFLAGS)
 
 # Do we really need to disable to many warnings? It seems to me that
 # many of these warnings are for custructs that we have been actively