Cleanups (#56)

Yet another attempt to remove some eclipse files, and fix travis file
for new location of bootloader.

.travis.yml

@@ -42,8 +42,8 @@ deploy:
   file:
     - projects/cm_mcu/gcc/cm_mcu.axf
     - projects/cm_mcu/gcc/cm_mcu.bin
-    - boot_loader/gcc/bl_main.axf
-    - boot_loader/gcc/bl_main.bin
+    - projects/boot_loader/gcc/bl_main.axf
+    - projects/boot_loader/gcc/bl_main.bin
   skip_cleanup: true
   on:
     tags: true

README.md

@@ -5,6 +5,7 @@ Microcontroller source code, initially targeting the [TI Tiva TM4C1290NCPDT](htt
 The project is a makefile project; you can also use the Eclipse-based [GNU MCU Eclipse](https://gnu-mcu-eclipse.github.io) IDE which integrates well with the Segger debugger. An Eclipse project is included in the repo. Again the build proceeds via `make` even if you use the IDE.  Follow the instructions on this page, also for windows you'll need to install `make`, `echo` and `rm` (as explained on the GNU MCU web page, see below.) You will also need a command-line `git`. The windows compilation has not been extensively tested.
 ## Compiler and source code
 For the compiler use the [generic GNU ARM compiler](https://developer.arm.com/open-source/gnu-toolchain/gnu-rm), [8-2018q4](https://launchpad.net/gcc-arm-embedded/+announcement/15181) release. Since this is a bare-metal application we are using the "arm-none-eabi" version of the tools (i.e., gcc becomes arm-none-eabi-gcc). This compiler is available as a part of the Petalinux suite but it has some weird options on how glibc is compiled so we are _not_ using it for this project.  The compiler linked above is available for Windows, Linux and MacOS. 
+There is also partial support for clang, mainly to allow use of its syntax checking and static code analysis. 
 
 To compile the source code simply type `make` at the top-level directory. To get debugging symbols type `make DEBUG=1`. To see the gory details of the build add `VERBOSE=1` to the command line.
 ```
@@ -37,9 +38,10 @@ Please try to use the below versions to avoid unnecessary issues. In particular
 
 | Software | Release | 
 |----------|---------|
-| arm-none-eabi compiler | 8-2018q4 | 
+| arm-none-eabi compiler | 8-2018q4* | 
 | FreeRTOS | 10.2 | 
 | Tivaware | included in build|
+Also tested with the 9-2019 version, which is more aggressive in the warnings. 
 
 ## Documentation
 See the wiki page on this github for documentation.

projects/cm_mcu/Makefile

@@ -115,7 +115,7 @@ ${COMPILER}/cm_mcu.axf: ${ROOT}/driverlib/${COMPILER}/libdriver.a
 ${COMPILER}/cm_mcu.axf: cm_mcu.ld
 SCATTERgcc_cm_mcu=cm_mcu.ld
 ENTRY_cm_mcu=ResetISR
-CFLAGSgcc=-DTARGET_IS_TM4C129_RA1 -DUSE_FREERTOS
+CFLAGS+=-DTARGET_IS_TM4C129_RA1 -DUSE_FREERTOS
 
 # this rule forces the main function to be recompiled when
 # any of the dependencies are out of date, to get the