Add ccache support

Author: LDong-Arm

.travis.yml

@@ -18,6 +18,16 @@ language: sh
 os: linux
 dist: focal
 
+cache:
+  pip: true
+  ccache: true
+  directories:
+    # Cache arm-none-eabi compiler
+    - ${HOME}/.cache/deps
+    # It looks like ccache for arm-none-eabi is not yet supported by Travis.
+    # Therefore manually adding ccache directory to cache
+    - ${HOME}/.ccache
+
 matrix:
   include:
 
@@ -26,7 +36,7 @@ matrix:
     - &mbed-psa-compile-test
       stage: "Compile"
       name: "Compile PSA example - release (ARM_MUSCA_S1)"
-      env: TARGET_NAME=ARM_MUSCA_S1 PROFILE=release
+      env: TARGET_NAME=ARM_MUSCA_S1 PROFILE=release CACHE_NAME=release-ARM_MUSCA_S1
       language: python
       python: 3.8
       install:
@@ -37,6 +47,13 @@ matrix:
         - export PATH="$PATH:${PWD}/gcc-arm-none-eabi-9-2020-q2-update/bin"
         - popd
         - arm-none-eabi-gcc --version
+        # Setup ccache
+        - ccache -o compiler_check=content
+        - pushd /usr/lib/ccache
+        - sudo ln -s $(which ccache) arm-none-eabi-gcc
+        - sudo ln -s $(which ccache) arm-none-eabi-g++
+        - export PATH="/usr/lib/ccache:$PATH"
+        - popd
         # Fetch mbed-os: We use manual clone, with depth=1 and --single-branch to save time.
         - git clone --depth=1 --single-branch https://github.com/ARMmbed/mbed-os.git;
         # Install Mbed CLI and dependencies
@@ -45,107 +62,108 @@ matrix:
       script:
         - echo mbed compile -t GCC_ARM -m ${TARGET_NAME} --profile ${PROFILE}
         - mbed compile -t GCC_ARM -m ${TARGET_NAME} --profile ${PROFILE}
+        - ccache -s
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - debug (ARM_MUSCA_S1)"
-      env: TARGET_NAME=ARM_MUSCA_S1 PROFILE=debug
+      env: TARGET_NAME=ARM_MUSCA_S1 PROFILE=debug CACHE_NAME=debug-ARM_MUSCA_S1
 
     # ARM_MUSCA_B1
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - release (ARM_MUSCA_B1)"
-      env: TARGET_NAME=ARM_MUSCA_B1 PROFILE=release
+      env: TARGET_NAME=ARM_MUSCA_B1 PROFILE=release CACHE_NAME=release-ARM_MUSCA_B1
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - debug (ARM_MUSCA_B1)"
-      env: TARGET_NAME=ARM_MUSCA_B1 PROFILE=debug
+      env: TARGET_NAME=ARM_MUSCA_B1 PROFILE=debug CACHE_NAME=debug-ARM_MUSCA_B1
 
     # K64F
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - release (K64F)"
-      env: TARGET_NAME=K64F PROFILE=release
+      env: TARGET_NAME=K64F PROFILE=release CACHE_NAME=release-K64F
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - debug (K64F)"
-      env: TARGET_NAME=K64F PROFILE=debug
+      env: TARGET_NAME=K64F PROFILE=debug CACHE_NAME=debug-K64F
 
     # K66F
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - release (K66F)"
-      env: TARGET_NAME=K66F PROFILE=release
+      env: TARGET_NAME=K66F PROFILE=release CACHE_NAME=release-K66F
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - debug (K66F)"
-      env: TARGET_NAME=K66F PROFILE=debug
+      env: TARGET_NAME=K66F PROFILE=debug CACHE_NAME=debug-K66F
 
     # NUCLEO_F429ZI
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - release (NUCLEO_F429ZI)"
-      env: TARGET_NAME=NUCLEO_F429ZI PROFILE=release
+      env: TARGET_NAME=NUCLEO_F429ZI PROFILE=release CACHE_NAME=release-NUCLEO_F429ZI
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - debug (NUCLEO_F429ZI)"
-      env: TARGET_NAME=NUCLEO_F429ZI PROFILE=debug
+      env: TARGET_NAME=NUCLEO_F429ZI PROFILE=debug CACHE_NAME=debug-NUCLEO_F429ZI
 
     # FVP_MPS2_M0
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - release (FVP_MPS2_M0)"
-      env: TARGET_NAME=FVP_MPS2_M0 PROFILE=release
+      env: TARGET_NAME=FVP_MPS2_M0 PROFILE=release CACHE_NAME=release-FVP_MPS2_M0
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - debug (FVP_MPS2_M0)"
-      env: TARGET_NAME=FVP_MPS2_M0 PROFILE=debug
+      env: TARGET_NAME=FVP_MPS2_M0 PROFILE=debug CACHE_NAME=debug-FVP_MPS2_M0
 
     # FVP_MPS2_M0P
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - release (FVP_MPS2_M0P)"
-      env: TARGET_NAME=FVP_MPS2_M0P PROFILE=release
+      env: TARGET_NAME=FVP_MPS2_M0P PROFILE=release CACHE_NAME=release-FVP_MPS2_M0P
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - debug (FVP_MPS2_M0P)"
-      env: TARGET_NAME=FVP_MPS2_M0P PROFILE=debug
+      env: TARGET_NAME=FVP_MPS2_M0P PROFILE=debug CACHE_NAME=debug-FVP_MPS2_M0P
 
     # FVP_MPS2_M3
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - release (FVP_MPS2_M3)"
-      env: TARGET_NAME=FVP_MPS2_M3 PROFILE=release
+      env: TARGET_NAME=FVP_MPS2_M3 PROFILE=release CACHE_NAME=release-FVP_MPS2_M3
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - debug (FVP_MPS2_M3)"
-      env: TARGET_NAME=FVP_MPS2_M3 PROFILE=debug
+      env: TARGET_NAME=FVP_MPS2_M3 PROFILE=debug CACHE_NAME=debug-FVP_MPS2_M3
 
     # FVP_MPS2_M4
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - release (FVP_MPS2_M4)"
-      env: TARGET_NAME=FVP_MPS2_M4 PROFILE=release
+      env: TARGET_NAME=FVP_MPS2_M4 PROFILE=release CACHE_NAME=release-FVP_MPS2_M4
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - debug (FVP_MPS2_M4)"
-      env: TARGET_NAME=FVP_MPS2_M4 PROFILE=debug
+      env: TARGET_NAME=FVP_MPS2_M4 PROFILE=debug CACHE_NAME=debug-FVP_MPS2_M4
 
     # FVP_MPS2_M7
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - release (FVP_MPS2_M7)"
-      env: TARGET_NAME=FVP_MPS2_M7 PROFILE=release
+      env: TARGET_NAME=FVP_MPS2_M7 PROFILE=release CACHE_NAME=release-FVP_MPS2_M7
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - debug (FVP_MPS2_M7)"
-      env: TARGET_NAME=FVP_MPS2_M7 PROFILE=debug
+      env: TARGET_NAME=FVP_MPS2_M7 PROFILE=debug CACHE_NAME=debug-FVP_MPS2_M7
 
     # GD32_F450ZI
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - release (GD32_F450ZI)"
-      env: TARGET_NAME=GD32_F450ZI PROFILE=release
+      env: TARGET_NAME=GD32_F450ZI PROFILE=release CACHE_NAME=release-GD32_F450ZI
 
     - <<: *mbed-psa-compile-test
       name: "Compile PSA example - debug (GD32_F450ZI)"
-      env: TARGET_NAME=GD32_F450ZI PROFILE=debug
+      env: TARGET_NAME=GD32_F450ZI PROFILE=debug CACHE_NAME=debug-GD32_F450ZI