ext: hal: cmsis: add define for __PROGRAM_START

For CMSIS compilation, we define __PROGRAM_START to avoid compiling the bss/data initialization routines provided by CMSIS. Signed-off-by: Ioannis Glaropoulos <[email protected]>
ivn-lj · Sep 26, 2019 · 90a2e1f · 90a2e1f
1 parent 794dc83
commit 90a2e1f
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/ext/hal/cmsis/CMakeLists.txt b/ext/hal/cmsis/CMakeLists.txt
@@ -1,3 +1,11 @@
 if(CONFIG_HAS_CMSIS)
   zephyr_include_directories(Include)
 endif()
+
+# As of CMSIS v5.6.0, __PROGRAM_START is to indicate whether the
+# ARM vendor or the OS supplies data/bss init routine, otherwise
+# the default data/bss init routine for the selected toolchain is
+# added. We set the macro in build-time to guarantee compatibility
+# with all existing ARM platforms.
+
+zephyr_compile_definitions(__PROGRAM_START)