docs: Update 3 files

README.md

@@ -49,20 +49,35 @@ Two HTTP client approaches are available:
    ```
 
    To use CPR in your CMakeLists.txt with proper static linking:
+
+   **Simple approach (recommended for new base images):**
+   ```cmake
+   find_package(nlohmann_json REQUIRED)
+   find_package(CPRStatic REQUIRED)
+   
+   target_link_libraries(${PROJECT_NAME} PRIVATE 
+       nlohmann_json::nlohmann_json 
+       cpr::cpr_static)
+   ```
+
+   **Backwards-compatible approach (works with all base image versions):**
    ```cmake
    find_package(nlohmann_json REQUIRED)
    
-   # Find OpenSSL libraries (path varies by architecture)
+   # Try the new CPRStatic module first, fall back to manual setup
+   find_package(CPRStatic QUIET)
+   if(NOT CPRStatic_FOUND)
+       # Fallback for older base images
        find_library(OPENSSL_SSL_LIB NAMES ssl PATHS /usr/local/lib64 /usr/local/lib NO_DEFAULT_PATH)
        find_library(OPENSSL_CRYPTO_LIB NAMES crypto PATHS /usr/local/lib64 /usr/local/lib NO_DEFAULT_PATH)
        
-   # CPR static linking setup
        add_library(cpr::cpr_static STATIC IMPORTED)
        set_target_properties(cpr::cpr_static PROPERTIES
            IMPORTED_LOCATION "/usr/local/lib/libcpr.a"
            INTERFACE_INCLUDE_DIRECTORIES "/usr/local/include"
            INTERFACE_LINK_LIBRARIES "/usr/local/lib/libcurl.a;${OPENSSL_SSL_LIB};${OPENSSL_CRYPTO_LIB};/usr/lib/libz.a;/usr/lib/libzstd.a;lzma;dl"
        )
+   endif()
    
    target_link_libraries(${PROJECT_NAME} PRIVATE 
        nlohmann_json::nlohmann_json 

build-base/Dockerfile.dropshell-build-base

@@ -183,20 +183,49 @@ RUN curl -LO https://github.com/libcpr/cpr/archive/refs/tags/${CPR_VERSION}.tar.
     make install && \
     cd / && rm -rf /tmp/cpr-${CPR_VERSION} /tmp/${CPR_VERSION}.tar.gz
 
-# Fix CPR CMake config to provide a static-only target
+# Create a CMake module for easy CPR static linking
-RUN cat > /usr/local/lib/cmake/cpr/cprConfig-static.cmake << 'EOF'
+RUN mkdir -p /usr/local/share/cmake/Modules
-# Static-only CPR configuration that avoids CURL dependency issues
+RUN cat > /usr/local/share/cmake/Modules/FindCPRStatic.cmake << 'EOF'
+# FindCPRStatic.cmake - Easy CPR static linking for dropshell-build projects
+#
+# This module provides cpr::cpr_static target with all dependencies handled automatically.
+# It works across all architectures by dynamically finding OpenSSL library paths.
+#
+# Usage in CMakeLists.txt:
+#   find_package(CPRStatic REQUIRED)
+#   target_link_libraries(${PROJECT_NAME} PRIVATE cpr::cpr_static)
 
-# Create the static CPR target
+# Find OpenSSL libraries (path varies by architecture)
+find_library(OPENSSL_SSL_LIB NAMES ssl PATHS /usr/local/lib64 /usr/local/lib NO_DEFAULT_PATH)
+find_library(OPENSSL_CRYPTO_LIB NAMES crypto PATHS /usr/local/lib64 /usr/local/lib NO_DEFAULT_PATH)
+
+if(NOT OPENSSL_SSL_LIB OR NOT OPENSSL_CRYPTO_LIB)
+    message(FATAL_ERROR "OpenSSL libraries not found. Expected in /usr/local/lib64 or /usr/local/lib")
+endif()
+
+# Create the CPR static target
+if(NOT TARGET cpr::cpr_static)
     add_library(cpr::cpr_static STATIC IMPORTED)
     set_target_properties(cpr::cpr_static PROPERTIES
-    IMPORTED_LOCATION "${CMAKE_CURRENT_LIST_DIR}/../../../lib/libcpr.a"
+        IMPORTED_LOCATION "/usr/local/lib/libcpr.a"
-    INTERFACE_INCLUDE_DIRECTORIES "${CMAKE_CURRENT_LIST_DIR}/../../../include"
+        INTERFACE_INCLUDE_DIRECTORIES "/usr/local/include"
-    INTERFACE_LINK_LIBRARIES "/usr/local/lib/libcurl.a;/usr/local/lib64/libssl.a;/usr/local/lib64/libcrypto.a;/usr/lib/libz.a;/usr/lib/libzstd.a;lzma;dl"
+        INTERFACE_LINK_LIBRARIES "/usr/local/lib/libcurl.a;${OPENSSL_SSL_LIB};${OPENSSL_CRYPTO_LIB};/usr/lib/libz.a;/usr/lib/libzstd.a;lzma;dl"
     )
     
     # Provide an alias for convenience
     add_library(cpr::static ALIAS cpr::cpr_static)
+endif()
+
+# Mark as found
+set(CPRStatic_FOUND TRUE)
+
+# Provide some useful variables
+set(CPRStatic_LIBRARY "/usr/local/lib/libcpr.a")
+set(CPRStatic_INCLUDE_DIR "/usr/local/include")
+set(CPRStatic_SSL_LIBRARY "${OPENSSL_SSL_LIB}")
+set(CPRStatic_CRYPTO_LIBRARY "${OPENSSL_CRYPTO_LIB}")
+
+mark_as_advanced(CPRStatic_LIBRARY CPRStatic_INCLUDE_DIR CPRStatic_SSL_LIBRARY CPRStatic_CRYPTO_LIBRARY)
 EOF
 
 

tests/cprdemo/CMakeLists.txt

@@ -37,17 +37,20 @@ target_include_directories(${PROJECT_NAME} PRIVATE
 # Find packages
 find_package(nlohmann_json REQUIRED)
 
-# Find OpenSSL libraries (path varies by architecture)
+# Try the new CPRStatic module first, fall back to manual setup
+find_package(CPRStatic QUIET)
+if(NOT CPRStatic_FOUND)
+    # Fallback for older base images
     find_library(OPENSSL_SSL_LIB NAMES ssl PATHS /usr/local/lib64 /usr/local/lib NO_DEFAULT_PATH)
     find_library(OPENSSL_CRYPTO_LIB NAMES crypto PATHS /usr/local/lib64 /usr/local/lib NO_DEFAULT_PATH)
     
-# CPR static linking setup
     add_library(cpr::cpr_static STATIC IMPORTED)
     set_target_properties(cpr::cpr_static PROPERTIES
         IMPORTED_LOCATION "/usr/local/lib/libcpr.a"
         INTERFACE_INCLUDE_DIRECTORIES "/usr/local/include"
         INTERFACE_LINK_LIBRARIES "/usr/local/lib/libcurl.a;${OPENSSL_SSL_LIB};${OPENSSL_CRYPTO_LIB};/usr/lib/libz.a;/usr/lib/libzstd.a;lzma;dl"
     )
+endif()
 
 # Link libraries
 target_link_libraries(${PROJECT_NAME} PRIVATE