diff --git a/.github/workflows/Linux_options.yml b/.github/workflows/Linux_options.yml
index 9458bbdd..dfa83f94 100644
--- a/.github/workflows/Linux_options.yml
+++ b/.github/workflows/Linux_options.yml
@@ -20,7 +20,7 @@ jobs:
       CC: gcc-11
     strategy:
       matrix:
-        options: [-DBUILD_D=OFF, -DBUILD_4=OFF, '-D-DBUILD_SHARED_LIBS=ON -DBUILD_WITH_BUFR=OFF -DBUILD_WITH_EXTRA_DEPS=OFF']
+        options: [-DBUILD_D=OFF, -DBUILD_4=OFF, '-DBUILD_SHARED_LIBS=ON -DBUILD_WITH_BUFR=OFF -DBUILD_WITH_EXTRA_DEPS=OFF']
 
     steps:
     
@@ -29,21 +29,27 @@ jobs:
       with:
         repository: NOAA-EMC/NCEPLIBS-bacio
         path: bacio
-        ref: v2.5.0
+        ref: v2.6.0
     
     - name: cache-bacio
       id: cache-bacio
       uses: actions/cache@v2
       with:
         path: ~/bacio
-        key: bacio-Linux_options_${{ runner.os }}-v2.5.0
+        key: bacio-Linux_options_${{ runner.os }}-v2.5.0-${{ matrix.options }}
 
     - name: build-bacio
       if: steps.cache-bacio.outputs.cache-hit != 'true'
       run: |
+        set -x
         cd bacio
         mkdir build && cd build
-        cmake -DCMAKE_INSTALL_PREFIX=~/bacio ..
+        if [ "${{ matrix.options }}" = "-DBUILD_SHARED_LIBS=ON -DBUILD_WITH_BUFR=OFF -DBUILD_WITH_EXTRA_DEPS=OFF" ]
+        then
+           cmake -DCMAKE_INSTALL_PREFIX=~/bacio -DBUILD_SHARED_LIBS=ON ..
+        else
+           cmake -DCMAKE_INSTALL_PREFIX=~/bacio ..
+        fi
         make -j2 VERBOSE=1
         make install
 
@@ -59,14 +65,20 @@ jobs:
       uses: actions/cache@v2
       with:
         path: ~/bufr
-        key: bufr-Linux_options_${{ runner.os }}-v11.7.1
+        key: bufr-Linux_options_${{ runner.os }}-v11.7.1-${{ matrix.options }}
 
     - name: build-bufr
       if: steps.cache-bufr.outputs.cache-hit != 'true'
       run: |
+        set -x
         cd bufr
         mkdir build && cd build
-        cmake -DCMAKE_INSTALL_PREFIX=~/bufr ..
+        if [ "${{ matrix.options }}" = "-DBUILD_SHARED_LIBS=ON -DBUILD_WITH_BUFR=OFF -DBUILD_WITH_EXTRA_DEPS=OFF" ]
+        then
+           cmake -DCMAKE_INSTALL_PREFIX=~/bufr -DBUILD_TESTING=OFF -DBUILD_SHARED_LIBS=ON ..
+        else
+           cmake -DCMAKE_INSTALL_PREFIX=~/bufr -DBUILD_TESTING=OFF ..
+        fi
         make -j2 VERBOSE=1
         make install
 
@@ -77,6 +89,7 @@ jobs:
 
     - name: build-w3emc
       run: |
+        set -x
         cd w3emc
         mkdir build 
         cd build
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index aeced74f..33628557 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -48,8 +48,10 @@ endif()
 
 # This is the C source code.
 set(c_src summary.c)
-
 add_library(c_obj_lib OBJECT ${c_src})
+if(BUILD_SHARED_LIBS)
+  set_property(TARGET c_obj_lib PROPERTY POSITION_INDEPENDENT_CODE 1)
+endif()
 
 # We buld a _4 and a _d by default.
 foreach(kind ${kinds})