From 71fd386f1a1557116e9e6c64f664b55f1e29f4d4 Mon Sep 17 00:00:00 2001
From: Malte Langermann <54738901+gagarinlg@users.noreply.github.com>
Date: Fri, 17 Oct 2025 06:37:09 +0200
Subject: [PATCH] chore: only use nano lib when required (#6655)

---
 radio/src/CMakeLists.txt               | 9 +++++++--
 radio/src/targets/horus/CMakeLists.txt | 1 +
 radio/src/targets/pl18/CMakeLists.txt  | 1 +
 tools/build-common.sh                  | 6 +++---
 4 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/radio/src/CMakeLists.txt b/radio/src/CMakeLists.txt
index d19c377d6..58b83e8b2 100644
--- a/radio/src/CMakeLists.txt
+++ b/radio/src/CMakeLists.txt
@@ -41,7 +41,7 @@ option(DEBUG_SEGGER_RTT "Debug output to Segger RTT" OFF)
 option(DEBUG_WINDOWS "Turn on windows traces" OFF)
 option(DEBUG_YAML "Turn on YAML traces" OFF)
 option(DEBUG_LABELS "Turn on Labels traces" OFF)
-option(NANO "Use nano newlib and binalloc")
+option(NANO "Use nano newlib and binalloc" ON)
 option(TEST_BUILD_WARNING "Warn this is a test build" OFF)
 option(MODULE_PROTOCOL_FCC "Add support for FCC modules" ON)
 option(MODULE_PROTOCOL_LBT "Add support for EU/LBT modules" ON)
@@ -611,9 +611,14 @@ set(LINKER_SCRIPT firmware.ld)
 target_link_options(firmware PRIVATE
   -lm -T${LINKER_DIR}/${LINKER_SCRIPT}
   -Wl,-Map=firmware.map,--cref,--no-warn-mismatch,--gc-sections
-  --specs=nano.specs
 )
 
+if(NANO)
+  target_link_options(firmware PRIVATE
+    --specs=nano.specs
+  )
+endif()
+
 if (DEFINED TARGET_FLASH_SIZE)
   # message("TARGET_FLASH_SIZE = ${TARGET_FLASH_SIZE}")
   target_link_options(firmware PRIVATE
diff --git a/radio/src/targets/horus/CMakeLists.txt b/radio/src/targets/horus/CMakeLists.txt
index cae18358f..b380a1ba9 100644
--- a/radio/src/targets/horus/CMakeLists.txt
+++ b/radio/src/targets/horus/CMakeLists.txt
@@ -22,6 +22,7 @@ set(PPM_LIMITS_SYMETRICAL YES)
 set(USB_SERIAL ON CACHE BOOL "Enable USB serial (CDC)")
 set(ROTARY_ENCODER YES)
 set(HARDWARE_EXTERNAL_MODULE YES)
+set(NANO OFF)
 
 # for size report script
 set(CPU_TYPE_FULL STM32F429xI)
diff --git a/radio/src/targets/pl18/CMakeLists.txt b/radio/src/targets/pl18/CMakeLists.txt
index df7625bde..8ba9619c0 100644
--- a/radio/src/targets/pl18/CMakeLists.txt
+++ b/radio/src/targets/pl18/CMakeLists.txt
@@ -21,6 +21,7 @@ set(RTC_BACKUP_RAM YES)
 set(PPM_LIMITS_SYMETRICAL YES)
 set(USB_SERIAL ON CACHE BOOL "Enable USB serial (CDC)")
 set(HARDWARE_EXTERNAL_MODULE YES)
+set(NANO OFF)
 
 # for size report script
 set(CPU_TYPE_FULL STM32F429xI)
diff --git a/tools/build-common.sh b/tools/build-common.sh
index 550e675a9..25f124ff6 100644
--- a/tools/build-common.sh
+++ b/tools/build-common.sh
@@ -120,7 +120,7 @@ get_target_build_options() {
             BUILD_OPTIONS+="-DPCB=T15PRO"
             ;;
         tx15)
-            BUILD_OPTIONS+="-DPCB=TX15 -DNANO=NO"
+            BUILD_OPTIONS+="-DPCB=TX15"
             ;;
         tx16s)
             BUILD_OPTIONS+="-DPCB=X10 -DPCBREV=TX16S"
@@ -156,10 +156,10 @@ get_target_build_options() {
             BUILD_OPTIONS+="-DPCB=PL18 -DPCBREV=NB4P"
             ;;
         st16)
-            BUILD_OPTIONS+="-DPCB=ST16 -DNANO=NO"
+            BUILD_OPTIONS+="-DPCB=ST16"
             ;;
         pa01)
-            BUILD_OPTIONS+="-DPCB=PA01 -DNANO=NO"
+            BUILD_OPTIONS+="-DPCB=PA01"
             ;;
         *)
             echo "Unknown target: $target_name"