[libc-commits] [libc] [libc] Application and testing support in baremetal Armv7-M CMake cache file (PR #233497)

[Victor Campos via libc-commits]

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@@ -1,8 +1,54 @@
 set(CMAKE_SYSTEM_PROCESSOR arm CACHE STRING "")
 set(RUNTIMES_TARGET_TRIPLE "armv7m-none-eabi" CACHE STRING "")
+set(LLVM_LIBC_FULL_BUILD ON CACHE BOOL "")
 
 foreach(lang C;CXX;ASM)
-  set(CMAKE_${lang}_FLAGS "-march=armv7m -mcpu=cortex-m4 -mfloat-abi=soft -Wno-atomic-alignment" CACHE STRING "")
+  set(CMAKE_${lang}_FLAGS "-march=armv7-m -mcpu=cortex-m4 -mfloat-abi=soft -mfpu=none" CACHE STRING "")
 endforeach()
 
+# Offload the errno definition to libc
+set(LIBC_CONF_ERRNO_MODE LIBC_ERRNO_MODE_SHARED CACHE STRING "")
+# Enable floating-point conversions in printf. This became practical with the
+# introduction of float320.
+set(LIBC_CONF_PRINTF_DISABLE_FLOAT OFF CACHE BOOL "")
+set(LIBC_CONF_PRINTF_FLOAT_TO_STR_USE_FLOAT320 ON CACHE BOOL "")
+# Discard unused printf functionality
+set(LIBC_CONF_PRINTF_MODULAR ON CACHE BOOL "")
+
+# Configs for testing and applications are only done if compiler-rt is enabled,
+# as the latter is a dependency for full programs.
+if(compiler-rt IN_LIST LLVM_ENABLE_RUNTIMES)
+  set(LLVM_INCLUDE_TESTS ON CACHE BOOL "")
+  set(LIBC_TEST_BUILTINS_TARGET "clang_rt.builtins-armv7m" CACHE STRING "")
+
+  # Memory mappings
+  set(__boot_flash 0x00000000)
+  set(__boot_flash_size 0x1000)
+  set(__flash 0x21000000)
+  set(__flash_size 0x600000)
+  set(__ram 0x21600000)
+  set(__ram_size 0xA00000)
+  set(__stack_size 0x1000)
----------------
vhscampos wrote:

Done

https://github.com/llvm/llvm-project/pull/233497