Split Pigweed targets out of default Ninja target
Instead of specifying toolchains explicitly in the default Ninja target,
break out each Pigweed target into a separate GN target. 🎯
Change-Id: Ie8a6b750d0180e44a860bc976eedc77b0c65b1d4
diff --git a/BUILD.gn b/BUILD.gn
index 69ebdc9..2742f25 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -22,28 +22,67 @@
# Main build file for upstream Pigweed.
declare_args() {
+ # The optimization level to use when building upstream Pigweed targets.
+ #
+ # Choices:
+ # debug
+ # size_optimized
+ # speed_optimized
+ pw_optimization_level = "debug"
+
+ # Whether or not the current toolchain is targeting a host. When possible,
+ # avoid depending on this arg. This is mostly just used to decide whether to
+ # build host tools.
+ #
+ # TODO(amontanez): This should probably be moved to a GNI file.
pw_IS_HOST_TOOLCHAIN = false
}
-# Enumerate all of the different targets that Pigweed will build.
+# Enumerate all of the different targets that upstream Pigweed will build by
+# default. Downstream projects should not depend on this target; this target is
+# exclusively to facilitate easy upstream development and testing.
group("default") {
- # Auto select a toolchain based on host.
+ deps = [
+ ":docs",
+ ":host",
+ ]
+}
+
+# Below are a list of GN targets you can build to force Pigweed to build for a
+# specific Pigweed target.
+group("host") {
+ # Auto select a toolchain based on host OS.
if (host_os == "linux") {
- _host_target_toolchain = "$dir_pigweed/targets/host:host_gcc_debug"
+ _default_host_toolchain = ":host_clang"
} else if (host_os == "mac") {
- _host_target_toolchain = "$dir_pigweed/targets/host:host_clang_debug"
+ _default_host_toolchain = ":host_clang"
} else if (host_os == "win") {
- _host_target_toolchain = "$dir_pigweed/targets/host:host_gcc_debug"
+ _default_host_toolchain = ":host_gcc"
} else {
assert(false, "Please define a host config for your system: $host_os")
}
- deps = [
- ":pigweed_default($_host_target_toolchain)",
- ":pigweed_default($dir_pigweed/targets/docs)",
- ":pigweed_default($dir_pigweed/targets/lm3s6965evb-qemu:lm3s6965evb_qemu_debug)",
- ":pigweed_default($dir_pigweed/targets/stm32f429i-disc1:stm32f429i_disc1_debug)",
- ]
+ deps = [ _default_host_toolchain ]
+}
+
+group("host_clang") {
+ deps = [ ":pigweed_default($dir_pigweed/targets/host:host_clang_$pw_optimization_level)" ]
+}
+
+group("host_gcc") {
+ deps = [ ":pigweed_default($dir_pigweed/targets/host:host_gcc_$pw_optimization_level)" ]
+}
+
+group("stm32f429i") {
+ deps = [ ":pigweed_default($dir_pigweed/targets/stm32f429i-disc1:stm32f429i_disc1_$pw_optimization_level)" ]
+}
+
+group("qemu") {
+ deps = [ ":pigweed_default($dir_pigweed/targets/lm3s6965evb-qemu:lm3s6965evb_qemu_$pw_optimization_level)" ]
+}
+
+group("docs") {
+ deps = [ ":pigweed_default($dir_pigweed/targets/docs)" ]
}
# By default, Pigweed will build this target when invoking ninja.
