fix linker error using response file (p4 only)

extra_scripts/ld_response_file.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+# force linker response file instead of command line arguments
+
+Import("env")
+
+
+def wrap_with_tempfile(command_key):
+    command = env.get(command_key)
+    if not command or not isinstance(command, str):
+        return
+    if "TEMPFILE(" in command:
+        return
+    env.Replace(**{command_key: "${TEMPFILE('%s')}" % command})
+
+
+# Force SCons to spill long commands into response files on this target.
+env.Replace(MAXLINELENGTH=8192)
+
+for key in ("LINKCOM", "CXXLINKCOM", "SHLINKCOM", "SHCXXLINKCOM"):
+    wrap_with_tempfile(key)

variants/esp32p4/esp32p4.ini

@@ -15,6 +15,10 @@ build_flags =
 build_src_filter = 
   ${esp32_common.build_src_filter} -<libpax/> -<platform/stm32wl> -<nimble> -<mesh/http/> -<platform/rp2xx0> -<mesh/raspihttp> -<serialization/>
 
+extra_scripts =
+  ${esp32p4_base.extra_scripts}
+  extra_scripts/ld_response_file.py
+
 ; Override esp32_common component pruning: keep esp_hosted + esp_wifi_remote for P4 hosted BT
 custom_component_remove =
   espressif/esp_modem