Merge pull request #1985 from kjbracey-arm/iar_vlas

Turn on C99 VLAs in IAR

Author: sg-

tools/export/iar_template.ewp.tmpl

@@ -402,7 +402,7 @@
         </option>
         <option>
           <name>IccAllowVLA</name>
-          <state>0</state>
+          <state>1</state>
         </option>
         <option>
           <name>IccCppDialect</name>

tools/toolchains/arm.py

@@ -38,7 +38,7 @@ class ARM(mbedToolchain):
             "--brief_diagnostics", "--restrict", "--multibyte_chars", "-I \""+ARM_INC+"\""],
         'asm': [],
         'c': ["--md", "--no_depend_system_headers", "--c99", "-D__ASSERT_MSG"],
-        'cxx': ["--cpp", "--no_rtti"],
+        'cxx': ["--cpp", "--no_rtti", "--no_vla"],
         'ld': [],
     }
 

tools/toolchains/gcc.py

@@ -38,7 +38,7 @@ class GCC(mbedToolchain):
             ],
         'asm': ["-x", "assembler-with-cpp"],
         'c': ["-std=gnu99"],
-        'cxx': ["-std=gnu++98", "-fno-rtti"],
+        'cxx': ["-std=gnu++98", "-fno-rtti", "-Wvla"],
         'ld': ["-Wl,--gc-sections", "-Wl,--wrap,main",
             "-Wl,--wrap,_malloc_r", "-Wl,--wrap,_free_r", "-Wl,--wrap,_realloc_r"],
     }

tools/toolchains/iar.py

@@ -40,7 +40,7 @@ class IAR(mbedToolchain):
             "-e", # Enable IAR language extension
             "--diag_suppress=Pa050,Pa084,Pa093,Pa082"],
         'asm': [],
-        'c': [],
+        'c': ["--vla"],
         'cxx': ["--guard_calls"],
         'ld': ["--skip_dynamic_initialization", "--threaded_lib"],
     }