first commit

libraries/bsec2/extra_script.py

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+Import('env')
+from os.path import join, realpath, exists
+
+# We need the equivalent of build.mcu in Arduino board definitions. 
+# For ESP this is BOARD_MCU
+cpu = env.get("BOARD_MCU")
+fpu = ""
+floatabi = ""
+
+# For ESP32, all variants except original ESP32 and "S" series are riscv
+# The 'esp32c3' target can be used on all riscv ESP32 variants.
+if cpu.startswith("esp32") and not (cpu.startswith("esp32s") or cpu == "esp32"):
+    cpu = "esp32c3"
+
+# For ARM cores, BOARD_MCU is the chip (e.g. rp2040), not the cpu (e.g. cortex-m0plus).
+# To find the correct binary, we check the linkflags.
+linkflags = env.get("LINKFLAGS", [])
+for flag in linkflags:
+    if flag.startswith("-mcpu="):
+        prefix, divider, cpu = flag.partition("=")
+        continue
+    elif flag.startswith("-mfpu="):
+        prefix, divider, fpu = flag.partition("=")
+        continue
+    elif flag.startswith("-mfloat-abi="):
+        prefix, divider, floatabi = flag.partition("=")
+        continue
+
+# For M4 / M33 -- use hardfloat binaries when appropriate
+if cpu in ['cortex-m4', 'cortex-m33'] and floatabi == "hard":
+    path = realpath(join("src", cpu, f"{fpu}-{floatabi}"))
+else:
+    path = realpath(join("src", cpu))
+
+if exists(path):
+    env.Append(
+        LIBPATH=[path],
+        LIBS=["algobsec"]
+    )
+else:
+    print(f"BSEC2 is not supported for CPU '{cpu} {floatabi}', path '{path}' doesn't exist")
+    exit(1)