Update README with comprehensive Linux build instructions and compatibility information

README.md

@@ -119,9 +119,11 @@ This script:
 - Configures CMake with proper toolchain
 - Builds the project using MSVC compiler
 
-### Linux/macOS Build Script
+### Linux Build Scripts
+
+#### Automated Build Script
 **File:** `scripts/build.sh`  
-**Requirements:** CMake, C++17 compiler, vcpkg
+**Requirements:** CMake, C++17 compiler, system packages
 
 ```bash
 # Make executable and run from project root
@@ -129,6 +131,54 @@ chmod +x scripts/build.sh
 ./scripts/build.sh
 ```
 
+This script:
+- Automatically detects and installs required dependencies
+- Configures CMake with Unix Makefiles
+- Builds the project in Release configuration
+
+#### Manual Linux Build (Recommended)
+**Requirements:** CMake 3.10+, GCC/Clang with C++17 support, system packages
+
+```bash
+# Install dependencies (Fedora/RHEL/CentOS)
+sudo dnf install cmake gcc-c++ libcurl-devel cryptopp-devel json-devel
+
+# Install dependencies (Ubuntu/Debian)
+sudo apt install cmake g++ libcurl4-openssl-dev libcrypto++-dev nlohmann-json3-dev
+
+# Build the project
+mkdir build
+cd build
+cmake ..
+make -j$(nproc)
+
+# Run tests
+ctest --verbose
+
+# Run example
+./example/example
+```
+
+**Linux Dependencies:**
+- **libcurl-devel** - HTTP client library
+- **cryptopp-devel** - Cryptographic library
+- **json-devel** - JSON parsing library
+- **cmake** - Build system
+- **gcc-c++** - C++17 compiler
+
+### macOS Build Script
+**File:** `scripts/build.sh`  
+**Requirements:** CMake, C++17 compiler, Homebrew packages
+
+```bash
+# Install dependencies via Homebrew
+brew install cmake cryptopp nlohmann-json curl
+
+# Make executable and run from project root
+chmod +x scripts/build.sh
+./scripts/build.sh
+```
+
 This script:
 - Bootstraps vcpkg if not present
 - Configures CMake with Unix Makefiles
@@ -140,8 +190,9 @@ This script:
 
 - CMake 3.10+
 - C++17 compatible compiler
-- Crypto++ (via vcpkg)
+- **Windows:** Crypto++ and nlohmann/json (via vcpkg)
-- nlohmann/json (via vcpkg)
+- **Linux:** libcurl, cryptopp, and nlohmann-json (via system packages)
+- **macOS:** libcurl, cryptopp, and nlohmann/json (via Homebrew)
 
 ### Compilation
 
@@ -157,14 +208,43 @@ powershell -NoProfile -ExecutionPolicy Bypass -File .\scripts\build_windows.ps1
 scripts\build_thinkpad.bat
 ```
 
-#### Linux/macOS - Build via scripts/build.sh
+#### Linux - Automated Build via scripts/build.sh
 ```bash
-# Requires: CMake, C++17 compiler, vcpkg
+# Requires: CMake, C++17 compiler, system packages
 chmod +x scripts/build.sh
 ./scripts/build.sh
 ```
 
-#### Manual Build
+#### Linux - Manual Build (Recommended)
+```bash
+# Install dependencies (Fedora/RHEL/CentOS)
+sudo dnf install cmake gcc-c++ libcurl-devel cryptopp-devel json-devel
+
+# Install dependencies (Ubuntu/Debian)
+sudo apt install cmake g++ libcurl4-openssl-dev libcrypto++-dev nlohmann-json3-dev
+
+# Build the project
+mkdir build
+cd build
+cmake ..
+make -j$(nproc)
+
+# Run tests and examples
+ctest --verbose
+./example/example
+```
+
+#### macOS - Build via scripts/build.sh
+```bash
+# Install dependencies via Homebrew
+brew install cmake cryptopp nlohmann-json curl
+
+# Requires: CMake, C++17 compiler, Homebrew packages
+chmod +x scripts/build.sh
+./scripts/build.sh
+```
+
+#### Manual Build (All Platforms)
 ```bash
 mkdir build
 cd build
@@ -172,7 +252,9 @@ cmake ..
 cmake --build . --config Release
 ```
 
-**Note:** The manual build method requires you to have all dependencies (CMake, compiler, vcpkg) properly configured. For most users, the platform-specific build scripts are recommended.
+**Note:** The manual build method requires you to have all dependencies properly configured. For most users, the platform-specific build scripts are recommended.
+
+**Linux Compatibility:** The project has been tested and successfully builds on Fedora Linux with system packages. It automatically detects the platform and uses appropriate dependency resolution methods (vcpkg for Windows, system packages for Linux/macOS).
 
 ## Usage
 
@@ -382,6 +464,13 @@ See [LICENSE](LICENSE) for details.
 
 ## Changelog
 
+### v0.1.1.6 (2025-08-28)
+- **NEW**: Full Linux compatibility with system packages
+- **NEW**: Automatic platform detection (Windows: vcpkg, Linux: system packages)
+- **IMPROVED**: Enhanced Linux build documentation and instructions
+- **IMPROVED**: Better dependency management for cross-platform builds
+- **FIXED**: CMakeLists.txt now works on both Windows and Linux without manual configuration
+
 ### v0.1.1.5 (2025-08-28)
 - **NEW**: Enhanced text format support (plaintext, syntax highlighting, markdown)
 - **NEW**: Comprehensive format testing in examples and integration tests