8.30. zlib-ng stage 2 2.3.3

Licenses:

• zlib License

Dependencies:

• musl (libc)
• cmake
• ninja (samurai)

zlib-ng is a deflate compression library with a zlib-compatible API mode. This is the final build of zlib-ng.

Extract and Enter the Source Tree

cd "$LBI_SOURCES"
tar -xf zlib-ng-2.3.3.tar.gz
cd zlib-ng-2.3.3

Configure zlib-ng

lbi_cmake build \
    -DCMAKE_C_COMPILER="clang" \
    -DCMAKE_C_FLAGS="$LWI_CFLAGS" \
    -DCMAKE_SHARED_LINKER_FLAGS="$LBI_CUSTOM_LDFLAGS" \
    -DCMAKE_EXE_LINKER_FLAGS="$LBI_CUSTOM_LDFLAGS" \
    -DZLIB_COMPAT=ON \
    -DBUILD_TESTING=OFF \
    -DINSTALL_UTILS=ON \
    -G Ninja

Build zlib-ng

cmake --build build $LWI_MAKE_FLAGS

Install zlib-ng

cmake --install build

Remove static library

rm -f /system/libraries/libz.a

Command Explanations

• cd "$LBI_SOURCES", tar -xf, and cd zlib-ng-...: Enter the staged zlib-ng source tree.
• lbi_cmake build: Configures zlib-ng with the book's CMake helper.
• -DCMAKE_C_COMPILER="clang": Builds with the final target Clang.
• -DCMAKE_C_FLAGS, shared-linker flags, and exe-linker flags: Apply local compile and link tuning.
• -DZLIB_COMPAT=ON: Builds zlib-compatible headers and library names.
• -DBUILD_TESTING=OFF: Skips tests in this target build.
• -DINSTALL_UTILS=ON: Installs zlib-ng utilities in the final target environment.
• cmake --build and cmake --install: Build and install the configured tree.
• rm -f /system/libraries/libz.a: Removes the static zlib archive so shared linking remains the default.