Add more debugging information for Travis

Co-authored by: nijincheng@iscas.ac.cn;

Author: ffgan

.travis.yml

@@ -36,20 +36,21 @@ jobs:
 
 install:
     # Maybe get and clean and patch source
-    - |
-      python3 -m pip install cibuildwheel==3.2.1
-      python3 -m cibuildwheel --help # make sure it is installed correctly
-      echo done install step
+    - pip install cibuildwheel==3.2.1 -v
+    - which cibuildwheel
+    - cibuildwheel --help # make sure it is installed correctly
+    - echo done install step
 
 script:
-    - |
-      export CIBW_BUILD="cp39-manylinux_${PLAT}"
-      export CIBW_MANYLINUX_S390X_IMAGE="manylinux${MB_ML_VER}"
-      export CIBW_MANYLINUX_PPC64LE_IMAGE="manylinux${MB_ML_VER}"
+    - CIBW_BUILD="cp39-manylinux_${PLAT}"
+    - CIBW_MANYLINUX_S390X_IMAGE="manylinux${MB_ML_VER}"
+    - CIBW_MANYLINUX_PPC64LE_IMAGE="manylinux${MB_ML_VER}"
+    
+    - echo "Building for PLAT=${PLAT}, INTERFACE64=${INTERFACE64}, MB_ML_VER=${MB_ML_VER}, CIBW_BUILD=${CIBW_BUILD}, CIBW_MANYLINUX_S390X_IMAGE=${CIBW_MANYLINUX_S390X_IMAGE}, CIBW_MANYLINUX_PPC64LE_IMAGE=${CIBW_MANYLINUX_PPC64LE_IMAGE}"
 
-      python3 -m cibuildwheel --print-build-identifiers
+    - cibuildwheel --print-build-identifiers
 
-      python3 -m cibuildwheel --output-dir dist
+    - cibuildwheel --output-dir dist
 
 after_success:
     - set +ex