[New] Build targeting android

Author: buck-yeh

build-android.sh

@@ -0,0 +1,8 @@
+cmake --build . --target clean
+rm CMakeCache.txt
+cmake -B build-android -G Ninja \
+  -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK_HOME/build/cmake/android.toolchain.cmake \
+  -DANDROID_ABI=arm64-v8a \
+  -DANDROID_PLATFORM=android-30 \
+  -DCMAKE_BUILD_TYPE=Release
+cmake --build build-android --config Release

include/bux/XPlatform.h

@@ -14,7 +14,7 @@
 
 namespace bux {
 
-#ifndef __APPLE__
+#if !defined(__APPLE__) && !defined(__ANDROID__)
 using T_LocalZone = const std::chrono::time_zone *;
 inline T_LocalZone local_zone() { return std::chrono::get_tzdb().current_zone(); }
 #define LOCALZONE_IS_TIMEZONE (1)

src/CMakeLists.txt

@@ -16,6 +16,9 @@ add_library(bux STATIC
         )
 target_include_directories(bux PRIVATE ../include/bux)
 target_compile_features(bux PRIVATE cxx_std_23)
+if(${CMAKE_SYSTEM_NAME} STREQUAL "Android")
+target_compile_options(bux PUBLIC -fPIC)
+endif()
 #target_compile_options(bux PRIVATE -g -O0)
 if(Iconv_FOUND)
 target_link_libraries(bux Iconv::Iconv)

src/StrUtil.cpp

@@ -6,13 +6,14 @@
 #include <cstring>          // strstr(), strlen()
 #ifdef _WIN32
     #include <processenv.h> // ExpandEnvironmentStringsA()
-#elif defined(__unix__) || defined(__unix) || defined(__gnu_linux__)
+#elif !defined(__ANDROID__) && (defined(__unix__) || defined(__unix) || defined(__gnu_linux__))
     #include <wordexp.h>    // wordexp(), wordfree()
 #else
     #define DISABLE_EXPAND_ENV_
 #endif
 #ifdef __unix__
-    #include <cxxabi.h>         // abi::__cxa_demangle()
+    #include <cstdlib>      // free()
+    #include <cxxabi.h>     // abi::__cxa_demangle()
 #endif