Initial commit

rpi1-toolchain.cmake

@@ -0,0 +1,71 @@
+# rpi1-toolchain.cmake - Toolchain file for Raspberry Pi 1 (ARMv6)
+
+# Additional settings for better compatibility
+set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
+
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_PROCESSOR arm)
+
+# Detect if we're in a try_compile invocation
+# During try_compile, BUILDROOT_PATH won't be available, but that's OK
+# because we set CMAKE_TRY_COMPILE_TARGET_TYPE above
+get_property(_IN_TRY_COMPILE GLOBAL PROPERTY IN_TRY_COMPILE)
+
+if(NOT _IN_TRY_COMPILE)
+    # Only validate during main configuration, not during try_compile
+    if(NOT BUILDROOT_PATH)
+        message(FATAL_ERROR 
+            "BUILDROOT_PATH is not defined!\n"
+            "Please pass -DBUILDROOT_PATH=/path/to/buildroot when configuring CMake.\n"
+            "Example: cmake -DBUILDROOT_PATH=/home/user/rpi1/buildroot ..."
+        )
+    endif()
+
+    # Verify BUILDROOT_PATH exists
+    if(NOT EXISTS "${BUILDROOT_PATH}")
+        message(FATAL_ERROR 
+            "BUILDROOT_PATH does not exist: ${BUILDROOT_PATH}\n"
+            "Please check your .env file or cmake configuration."
+        )
+    endif()
+    
+    # Cache it for use in this file during try_compile
+    set(BUILDROOT_PATH "${BUILDROOT_PATH}" CACHE PATH "Path to buildroot directory" FORCE)
+endif()
+
+# If BUILDROOT_PATH is not set (during try_compile), try to get it from cache
+if(NOT BUILDROOT_PATH)
+    get_property(BUILDROOT_PATH CACHE BUILDROOT_PATH PROPERTY VALUE)
+endif()
+
+# Specify the cross compiler
+set(TOOLCHAIN_PREFIX ${BUILDROOT_PATH}/output/host)
+set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}/bin/arm-linux-gcc)
+set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}/bin/arm-linux-g++)
+
+# Specify the sysroot for finding libraries and headers
+set(CMAKE_SYSROOT ${TOOLCHAIN_PREFIX}/arm-buildroot-linux-gnueabihf/sysroot)
+set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
+
+# Only verify paths during main configuration
+if(NOT _IN_TRY_COMPILE)
+    # Verify sysroot exists
+    if(NOT EXISTS "${CMAKE_SYSROOT}")
+        message(FATAL_ERROR 
+            "Sysroot not found: ${CMAKE_SYSROOT}\n"
+            "Please check that buildroot is properly built."
+        )
+    endif()
+endif()
+
+# Search for programs in the build host directories
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+
+# Search for libraries and headers in the target directories
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+
+# Specify target architecture flags
+set(CMAKE_C_FLAGS_INIT "-march=armv6 -mfpu=vfp -mfloat-abi=hard")
+set(CMAKE_CXX_FLAGS_INIT "-march=armv6 -mfpu=vfp -mfloat-abi=hard")