Update build workflow to statically build Abseil and project dependencies

Modify GitHub Actions workflow to:
- Build Abseil from source statically
- Configure CMake for static linking
- Remove external Abseil library dependency
- Update build flags to support static compilation

.github/workflows/build.yml

@@ -9,6 +9,7 @@ on:
 env:
   PKG_VERSION: "2.1.0"
   PKG_RELEASE: "1"
+  ABSEIL_VERSION: "20230125.3"
 
 jobs:
   build:
@@ -23,15 +24,34 @@ jobs:
       - name: Install Dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y build-essential cmake libabsl-dev clang checkinstall
+          sudo apt-get install -y build-essential cmake clang checkinstall zlib1g-dev musl-tools
 
-      - name: Create build directory
+      - name: Build Static Abseil
-        run: mkdir build
+        run: |
+          git clone https://github.com/abseil/abseil-cpp.git
+          cd abseil-cpp
+          mkdir build && cd build
+          cmake -DCMAKE_BUILD_TYPE=Release \
+                -DCMAKE_POSITION_INDEPENDENT_CODE=ON \
+                -DABSL_BUILD_TESTING=OFF \
+                -DABSL_USE_GOOGLETEST_HEAD=OFF \
+                -DCMAKE_CXX_STANDARD=17 \
+                -DBUILD_SHARED_LIBS=OFF \
+                ..
+          make -j$(nproc)
+          make install
+          ldconfig
 
       - name: Configure the project
         run: |
-          cd build
+          mkdir build; cd build
-          CC=clang CXX=clang++ cmake -DCMAKE_BUILD_TYPE=Release -DUSE_CLANG=ON -DBUILD_STATIC=OFF ..
+          CC=clang CXX=clang++ cmake -DCMAKE_BUILD_TYPE=Release \
+            -DUSE_CLANG=ON \
+            -DBUILD_STATIC=ON \
+            -DCMAKE_EXE_LINKER_FLAGS="-static -static-libgcc -static-libstdc++" \
+            -DCMAKE_FIND_LIBRARY_SUFFIXES=".a" \
+            -DCMAKE_EXE_LINKER_FLAGS_INIT="-static" \
+            ..
 
       - name: Build the project
         run: |
@@ -45,7 +65,7 @@ jobs:
                            --pkgversion=${{ env.PKG_VERSION }} \
                            --pkgrelease=${{ env.PKG_RELEASE }} \
                            --maintainer="maintainer@example.com" \
-                           --requires="libabsl20220623t64" \
+                           --requires="" \
                            --default \
                            --pakdir=. \
                            --backup=no \

.gitignore

@@ -0,0 +1,43 @@
+# CMake build directories
+build/
+CMakeFiles/
+CMakeCache.txt
+cmake_install.cmake
+compile_commands.json
+CTestTestfile.cmake
+Testing/
+_deps/
+
+# Compiled files
+*.o
+*.obj
+*.exe
+*.out
+*.app
+*.dll
+*.so
+*.dylib
+
+# IDE specific files
+.vscode/
+.idea/
+*.swp
+*.swo
+.DS_Store
+
+# Generated files
+Makefile
+*.make
+*.cmake
+!CMakeLists.txt
+
+# Dependencies
+_deps/
+vcpkg_installed/
+
+# Debug symbols
+*.pdb
+*.dSYM/
+
+# Generated documentation
+docs/_build/ 

utils.h

@@ -16,6 +16,7 @@
 #define UTILS_H_
 
 #include <string>
+#include <cstdint>
 
 #include "absl/strings/string_view.h"