Support Debug/Release configurations

- Puts shared flags in scripts/standalone and adds "build configurations"
  for debug and release which customize the build flags for specific
  purposes.
- Documents CONFIGURATION in Sphinx docs and makefile help

Signed-off-by: Nathaniel Graff <nathaniel.graff@sifive.com>

3 files changed, 17 insertions, 15 deletions

diff --git a/doc/sphinx/userguide/buildingcoreip.rst b/doc/sphinx/userguide/buildingcoreip.rst
index 986ad68..7fd821e 100644
--- a/doc/sphinx/userguide/buildingcoreip.rst
+++ b/doc/sphinx/userguide/buildingcoreip.rst
@@ -8,17 +8,18 @@ To compile a bare-metal RISC-V program:
 
 .. code-block:: bash
 
-   make [PROGRAM=hello] [TARGET=coreip-e31-rtl] software
+   make [PROGRAM=hello] [TARGET=coreip-e31-rtl] [CONFIGURATION=debug] software
 
 The square brackets in the above command indicate optional parameters for the
 Make invocation. As you can see, the default values of these parameters tell
-the build script to build the ``hello`` example for the ``coreip-e31`` target.
-If, for example, you wished to build the ``timer-interrupt`` example for the S51
-Core IP target, you would instead run the command
+the build script to build the ``hello`` example for the ``coreip-e31`` target
+with the ``debug`` build configuration. If, for example, you wished to build
+the ``timer-interrupt`` example for the S51 Core IP target with the ``release``
+configuration, you would instead run the command
 
 .. code-block:: bash
 
-   make PROGRAM=timer-interrupt TARGET=coreip-s51-rtl software
+   make PROGRAM=timer-interrupt TARGET=coreip-s51-rtl CONFIGURATION=release software
 
 Cleaning a Target Program Build Directory
 -----------------------------------------
@@ -27,5 +28,5 @@ The ``clean`` target can be used to restore a target program's directory to a cl
 
 .. code-block:: bash
 
-   make [PROGRAM=hello] [TARGET=coreip-e31-rtl] clean
+   make [PROGRAM=hello] [TARGET=coreip-e31-rtl] [CONFIGURATION=debug] clean
 
diff --git a/doc/sphinx/userguide/buildingdevboard.rst b/doc/sphinx/userguide/buildingdevboard.rst
index a5d364d..d972b3a 100644
--- a/doc/sphinx/userguide/buildingdevboard.rst
+++ b/doc/sphinx/userguide/buildingdevboard.rst
@@ -8,17 +8,18 @@ To compile a bare-metal RISC-V program:
 
 .. code-block:: bash
 
-   make [PROGRAM=hello] [TARGET=sifive-hifive1] software
+   make [PROGRAM=hello] [TARGET=sifive-hifive1] [CONFIGURATION=debug] software
 
 The square brackets in the above command indicate optional parameters for the
 Make invocation. As you can see, the default values of these parameters tell
-the build script to build the ``hello`` example for the ``sifive-hifive1`` target.
-If, for example, you wished to build the ``timer-interrupt`` example for the S51
-Arty FPGA Evaluation target, you would instead run the command
+the build script to build the ``hello`` example for the ``sifive-hifive1`` target
+using the ``debug`` build configuration. If, for example, you wished to build
+the ``timer-interrupt`` example for the S51 Arty FPGA Evaluation target using
+the ``release`` build configuration, you would instead run the command
 
 .. code-block:: bash
 
-   make PROGRAM=timer-interrupt TARGET=coreip-s51-arty software
+   make PROGRAM=timer-interrupt TARGET=coreip-s51-arty CONFIGURATION=release software
 
 Uploading to the Target Board
 -----------------------------
@@ -32,7 +33,7 @@ the development board into your computer and running the following command:
 
 .. code-block:: bash
 
-   make [PROGRAM=hello] [TARGET=sifive-hifive1] upload
+   make [PROGRAM=hello] [TARGET=sifive-hifive1] [CONFIGURATION=debug] upload
 
 Debugging a Target Program
 --------------------------
@@ -49,7 +50,7 @@ the development board into your computer and running the following command:
 
 .. code-block:: bash
 
-   make [PROGRAM=hello] [TARGET=sifive-hifive1] debug
+   make [PROGRAM=hello] [TARGET=sifive-hifive1] [CONFIGURATION=debug] debug
 
 Cleaning a Target Program Build Directory
 -----------------------------------------
@@ -58,5 +59,5 @@ The ``clean`` target can be used to restore a target program's directory to a cl
 
 .. code-block:: bash
 
-   make [PROGRAM=hello] [TARGET=sifive-hifive1] clean
+   make [PROGRAM=hello] [TARGET=sifive-hifive1] [CONFIGURATION=debug] clean
 
diff --git a/doc/sphinx/userguide/standalone.rst b/doc/sphinx/userguide/standalone.rst
index ee31362..0703ddb 100644
--- a/doc/sphinx/userguide/standalone.rst
+++ b/doc/sphinx/userguide/standalone.rst
@@ -15,5 +15,5 @@ be included in the generated project as a pre-built archive.
 
 .. code-block:: bash
 
-   make [PROGRAM=hello] [TARGET=sifive-hifive1] [INCLUDE_METAL_SOURCES=1] STANDALONE_DEST=/path/to/desired/location standalone
+   make [PROGRAM=hello] [TARGET=sifive-hifive1] [CONFIGURATION=debug] [INCLUDE_METAL_SOURCES=1] STANDALONE_DEST=/path/to/desired/location standalone