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add new gen/ directory for generated sources

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Allow modules to generate source into $OUT/gen, which will then
be copied into $OUT/obj and $OUT/obj_$(TARGET_2ND_ARCH) as
necessary.  This allows a single build rule invocation that includes
generated source to build for the first and second architectures.

Modules will need to change calls to local-intermediates-dir into
local-generated-sources-dir.

Change-Id: I62504bad9454b3d9fde7b84ab9f0a487a2ecf0bf
This commit is contained in:
Colin Cross
2014-01-24 23:17:21 -08:00
parent d0378b3f2d
commit d826264621
5 changed files with 65 additions and 6 deletions
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10
core/build-system.html
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@@ -409,8 +409,8 @@ a couple of examples. <code>$@</code> is the make built-in variable for
need to change.</p>
<p>You need to put this after you have declared <code>LOCAL_PATH</code> and
<code>LOCAL_MODULE</code>, because the <code>$(local-intermediates-dir)</code>
and <code>$(local-host-intermediates-dir)</code> macros use these variables
<code>LOCAL_MODULE</code>, because the <code>$(local-generated-sources-dir)</code>
and <code>$(local-host-generated-sources-dir)</code> macros use these variables
to determine where to put the files.
<h5>Example 1</h5>
@@ -419,7 +419,7 @@ chartables.c, which doesn't depend on anything. And is built by the tool
built to $(HOST_OUT_EXECUTABLES)/dftables. Note on the second to last line
that a dependency is created on the tool.</p>
<pre>
intermediates:= $(local-intermediates-dir)
intermediates:= $(local-generated-sources-dir)
GEN := $(intermediates)/<font color=red>chartables.c</font>
$(GEN): PRIVATE_CUSTOM_TOOL = <font color=red>$(HOST_OUT_EXECUTABLES)/dftables $@</font>
$(GEN): <font color=red>$(HOST_OUT_EXECUTABLES)/dftables</font>
@@ -433,7 +433,7 @@ a file. Pretend that it does something useful. Note how we use a
target-specific variable called PRIVATE_INPUT_FILE to store the name of the
input file.</p>
<pre>
intermediates:= $(local-intermediates-dir)
intermediates:= $(local-generated-sources-dir)
GEN := $(intermediates)/<font color=red>file.c</font>
$(GEN): PRIVATE_INPUT_FILE := $(LOCAL_PATH)/<font color=red>input.file</font>
$(GEN): PRIVATE_CUSTOM_TOOL = <font color=red>cat $(PRIVATE_INPUT_FILE) &gt; $@</font>
@@ -447,7 +447,7 @@ LOCAL_GENERATED_SOURCES += $(GEN)
name, and use the same tool, you can combine them. (here the *.lut.h files are
the generated ones, and the *.cpp files are the input files)</p>
<pre>
intermediates:= $(local-intermediates-dir)
intermediates:= $(local-generated-sources-dir)
GEN := $(addprefix $(intermediates)<font color=red>/kjs/, \
array_object.lut.h \
bool_object.lut.h \</font>