MLECO-3101: Minor changes for CMSIS pack

Improvements based on feedback from initial tests done with
the generated pack.

Change-Id: Ia769dd6264c53e6b9337473e1c50bdfa6469a216
Signed-off-by: Kshitij Sisodia <kshitij.sisodia@arm.com>
diff --git a/scripts/cmake/cmsis-pack-gen/CMakeLists.txt b/scripts/cmake/cmsis-pack-gen/CMakeLists.txt
index 2a25aec..2774ab2 100644
--- a/scripts/cmake/cmsis-pack-gen/CMakeLists.txt
+++ b/scripts/cmake/cmsis-pack-gen/CMakeLists.txt
@@ -51,3 +51,12 @@
 foreach(API ${UC_API_LIST})
     add_subdirectory(${API} ${CMAKE_BINARY_DIR}/${API})
 endforeach()
+
+# Any custom steps that are required for the CMSIS pack generation flow
+# must be declared here:
+if (CMSIS_PACK_GEN_FLOW)
+    # For CMSIS packs, we need CMSIS DSP definition.
+    # @TODO: Currently, this line is added multiple times to the include file. Uncomment when
+    # packgen is fixed.
+    # add_compile_definitions(arm_math PRIVATE ARM_MATH_DSP)
+endif()
diff --git a/scripts/cmake/cmsis-pack-gen/use-case-api.yml b/scripts/cmake/cmsis-pack-gen/use-case-api.yml
index 9620e17..8796dff 100644
--- a/scripts/cmake/cmsis-pack-gen/use-case-api.yml
+++ b/scripts/cmake/cmsis-pack-gen/use-case-api.yml
@@ -35,7 +35,7 @@
 
 build:
   - name: "build-dir"
-    options: "cmake"
+    options: "cmake -DCMSIS_PACK_GEN_FLOW=ON"
 
 packs:
   - name: "ml-embedded-eval-kit-uc-api"
@@ -79,11 +79,16 @@
         target: arm_math
         attributes: { Cclass: "Machine Learning", Cgroup: "Evaluation Kit", Csub: "Common: Math", Cversion: "1.0.0" }
         description: "Math function helpers dependent on CMSIS-DSP."
+        conditions:
+          - require: { Cclass: "CMSIS", Cgroup: "DSP"}
 
       - name: common_api
         target: common_api
         attributes: {Cclass: "Machine Learning", Cgroup: "Evaluation Kit", Csub: "Common: API", Cversion: "1.0.0"}
         description: "Common API"
+        dependencies: ["arm_math", "log"]
+        conditions:
+          - require: { Cclass: "Machine Learning", Cgroup: "TensorFlow" }
 
       - name: ad_api
         target: ad_api