Adds "armvX-none-rvct" targets

Adds following targets to configure script to support RVCT compilation
without operating system support (for Profiler or bare metal images).
 - armv5te-none-rvct
 - armv6-none-rvct
 - armv7-none-rvct

To strip OS specific parts from the code "os_support"-config was added
to script and CONFIG_OS_SUPPORT flag is used in the code to exclude OS
specific parts such as OS specific includes and function calls for
timers and threads etc. This was done to enable RVCT compilation for
profiling purposes or running the image on bare metal target with
Lauterbach.

Removed separate AREA directives for READONLY data in armv6 and neon
assembly files to fix the RVCT compilation. Otherwise
"ldr <reg>, =label" syntax would have been needed to prevent linker
errors. This syntax is not supported by older gnu assemblers.

Change-Id: I14f4c68529e8c27397502fbc3010a54e505ddb43

1 files changed, 8 insertions, 5 deletions

diff --git a/build/make/configure.sh b/build/make/configure.sh
index 75279b9b9..8c4d2cf79 100755
--- a/build/make/configure.sh
+++ b/build/make/configure.sh
@@ -664,7 +664,7 @@ process_common_toolchain() {
             elif enabled armv7
             then
                 check_add_cflags -march=armv7-a -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp  #-ftree-vectorize
-        check_add_asflags -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp  #-march=armv7-a
+                check_add_asflags -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp  #-march=armv7-a
             else
                 check_add_cflags -march=${tgt_isa}
                 check_add_asflags -march=${tgt_isa}
@@ -695,10 +695,17 @@ process_common_toolchain() {
             arch_int=${arch_int%%te}
             check_add_asflags --pd "\"ARCHITECTURE SETA ${arch_int}\""
             enabled debug && add_asflags -g
+            add_cflags --gnu
+            add_cflags --enum_is_int
+            add_cflags --wchar32
         ;;
         esac
 
         case ${tgt_os} in
+        none*)
+            disable multithread
+            disable os_support
+            ;;
         darwin*)
             SDK_PATH=/Developer/Platforms/iPhoneOS.platform/Developer
             TOOLCHAIN_PATH=${SDK_PATH}/usr/bin
@@ -747,13 +754,9 @@ process_common_toolchain() {
                     || die "Must supply --libc when targetting *-linux-rvct"
 
                 # Set up compiler
-                add_cflags --gnu
-                add_cflags --enum_is_int
                 add_cflags --library_interface=aeabi_glibc
                 add_cflags --no_hide_all
-                add_cflags --wchar32
                 add_cflags --dwarf2
-                add_cflags --gnu
 
                 # Set up linker
                 add_ldflags --sysv --no_startup --no_ref_cpp_init