Updated README.md to include instructions for how to build on a different ARM architecture (like Raspberry Pi CortexA53). Moved the -T into SRC_LD so its easier to disable.

IDE/GCC-ARM/Makefile.common

@@ -12,7 +12,7 @@ INC = -I./Header \
 	  -I../..
 
 # Memory Map
-SRC_LD = ./linker.ld
+SRC_LD = -T./linker.ld
 
 # Defines
 DEF = -DWOLFSSL_USER_SETTINGS
@@ -85,7 +85,7 @@ $(BUILD_DIR)/%.o: %.c
 
 $(BUILD_DIR)/$(BIN).elf: $(OBJS_ASM) $(OBJS_C)
 	@echo "Linking ELF binary: $(notdir $@)"
-	$(CMD_ECHO) $(LD) $(LDFLAGS) -T$(SRC_LD) -o $@ $^ $(LIBS)
+	$(CMD_ECHO) $(LD) $(LDFLAGS) $(SRC_LD) -o $@ $^ $(LIBS)
 
 	@echo "Generating name list: $(BIN).sym"
 	$(CMD_ECHO) $(NM) -n $@ > $(BUILD_DIR)/$(BIN).sym

IDE/GCC-ARM/README.md

@@ -17,9 +17,22 @@ This example is for Cortex M series, but can be adopted for other architectures.
   * Use correct architecture 'ARCHFLAGS' (default is cortex-m0 / thumb). See [GCC ARM Options](https://gcc.gnu.org/onlinedocs/gcc-4.7.3/gcc/ARM-Options.html) `-mcpu=name`.
 3. Use `make` and it will build the static library and wolfCrypt test/benchmark and wolfSSL TLS client targets as `.elf` and `.hex` in `/Build`.
 
-Example:
+### Building for Raspberry Pi
+
+Example `Makefile.common` changes for Rasperry Pi with Cortex-A53:
+
+1. Change ARCHFLAGS to `ARCHFLAGS = -mcpu=cortex-a53 -mthumb -mabi=aapcs` to specify Cortex-A53.
+2. Comment out `SRC_LD`, since custom memory map is not applicable.
+3. Clear `TOOLCHAIN`, so it will use default `gcc`. Set `TOOLCHAIN = `
+4. Comment out `LDFLAGS += --specs=nano.specs --specs=nosys.specs` to disable newlib-nano.
+
+Note: To comment out a line in a Makefile use place `#` in front of line.
+
+### Example Build
 
 ```
+make clean && make
+
    text	   data	    bss	    dec	    hex   filename
   50076	   2508	     44	  52628	   cd94   ./Build/WolfCryptTest.elf
 
@@ -32,6 +45,8 @@ Example:
 
 ## Performace Tuning Options
 
+These settings are located in `Header/user_settings.h`.
+
 * `DEBUG_WOLFSSL`: Undefine this to disable debug logging.
 * `NO_ERROR_STRINGS`: Disables error strings to save code space.
 * `NO_INLINE`: Disabling inline function saves about 1KB, but is slower.