[Android] Can't add max-page-size to ldflags

[ifarbod]

I want to support 16KiB page sizes, which are mandatory for Android 15+.

add_ldflags("-z max-page-size=16384", {force = true})

For some reason, this flag doesn't get added to the linker when it gets invoked by Xmake (can be confirmed by xmake -vD). Am I doing it wrong?

[waruqi]

please show whole logs

xmake -rvD

[ifarbod]

My config:

set_xmakever("2.9.5")

set_languages("c17", "cxx14")

add_rules("mode.debug", "mode.releasedbg", "mode.release")
add_rules("plugin.vsxmake.autoupdate")
add_rules("plugin.compile_commands.autoupdate")

if is_mode("release") then
    set_optimize("fastest")
end

target("myapplicationcpp2")
    if is_plat("android") then
        set_kind("shared")
        set_runtimes("c++_static")
    else
        set_kind("binary")
    end

    set_symbols("debug")
    set_strip("all")

    add_files("src/**.cpp")
    add_includedirs("src/")

    -- this doesn't work
    add_ldflags("-z max-page-size=16384", {force = true})

Logs:

> xmake -rvD
checking for Android SDK directory ... C:\Users\iFarbod\AppData\Local\Android\Sdk
checking for Build Tools Version of Android SDK ... 35.0.0
checking for NDK directory ... C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006
checking for SDK version of NDK ... 21
checking for clang++ ... C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++
checking for the shared library linker (sh) ... clang++
checking for clang++ ... C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++
checking for the linker (ld) ... clang++
checking for clang++ ... C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++
checking for the c++ compiler (cxx) ... clang++
checking for C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++ ... ok
checking for flags (-fPIC) ... ok
> clang++ "-fPIC" "--sysroot=C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot" "-isystem" "C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\include\aarch64-linux-android" "-Qunused-arguments" "-target" "aarch64-none-linux-android21"
checking for flags (-fvisibility-inlines-hidden) ... ok
> clang++ "-fvisibility-inlines-hidden" "--sysroot=C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot" "-isystem" "C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\include\aarch64-linux-android" "-Qunused-arguments" "-target" "aarch64-none-linux-android21"
checking for flags (-O0) ... ok
> clang++ "-O0" "--sysroot=C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot" "-isystem" "C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\include\aarch64-linux-android" "-Qunused-arguments" "-target" "aarch64-none-linux-android21"
[ 50%]: cache compiling.debug src\native_lib.cpp
C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++ -c --sysroot=C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot -isystem C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\include\aarch64-linux-android -Qunused-arguments -target aarch64-none-linux-android21 -fPIC -g -O0 -std=c++14 -Isrc -o build\.objs\myapplicationcpp2\android\arm64-v8a\debug\src\native_lib.cpp.o src\native_lib.cpp
checking for flags (-MMD -MF) ... ok
> clang++ "-MMD" "-MF" "C:\Users\iFarbod\AppData\Local\Temp\.xmake\241010\_4BD9DB0D970944708F8BAECFC9E204F0" "--sysroot=C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot" "-isystem" "C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\include\aarch64-linux-android" "-Qunused-arguments" "-target" "aarch64-none-linux-android21"
checking for flags (-fdiagnostics-color=always) ... ok
> clang++ "-fdiagnostics-color=always" "--sysroot=C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot" "-isystem" "C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\sysroot\usr\include\aarch64-linux-android" "-Qunused-arguments" "-target" "aarch64-none-linux-android21"
checkinfo: cannot runv(aarch64-linux-android-strip.exe --version), No such file or directory
checking for aarch64-linux-android-strip ... no
checking for the symbols stripper (strip: aarch64-linux-android-strip) ... no
checking for llvm-strip ... C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\bin\llvm-strip
checking for the symbols stripper (strip) ... llvm-strip
checking for flags (-fPIC) ... ok
> clang++ "-fPIC" "-shared" "-llog" "-target" "aarch64-none-linux-android21" "-static-libstdc++" "-lc++abi" "-llog" "-target" "aarch64-none-linux-android21" "-static-libstdc++" "-lc++abi"
[ 75%]: linking.debug libmyapplicationcpp2.so
C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++ -o build\android\arm64-v8a\debug\libmyapplicationcpp2.so build\.objs\myapplicationcpp2\android\arm64-v8a\debug\src\native_lib.cpp.o -shared -llog -target aarch64-none-linux-android21 -static-libstdc++ -lc++abi -fPIC
[ 75%]: generating.debug myapplicationcpp2.sym
> copy build\android\arm64-v8a\debug\libmyapplicationcpp2.so to build\android\arm64-v8a\debug\myapplicationcpp2.sym
C:\Users\iFarbod\AppData\Local\Android\Sdk\ndk\27.1.12297006\toolchains\llvm\prebuilt\windows-x86_64\bin\llvm-strip -s build\android\arm64-v8a\debug\libmyapplicationcpp2.so

build cache stats:
cache directory: C:\$Files\Projects\example-xmake-android-project\build\.build_cache
cache hit rate: 100%
cache hit: 1
cache hit total time: 0.000s
cache miss: 0
cache miss total time: 0.000s
new cached files: 0
remote cache hit: 0
remote new cached files: 0
preprocess failed: 0
compile fallback count: 0
compile total time: 0.000s

create ok!
compile_commands.json updated!
[100%]: build ok, spent 4.218s

[ifarbod]

Also noticed -static-libstdc++, this is the old GNU stl, shouldn't it be using LLVM stl ?

[waruqi]

if is_plat("android") then

    set_kind("shared")

you should use add_shflags instead of add_ldflags for shared target.

[ifarbod]

add_shflags actually worked!

For anyone who needs a quick snippet:

    if is_plat("android") then
        if is_arch("arm64-v8a") or is_arch("x86_64") then
            add_shflags("-z max-page-size=16384")
        end
    end

[star-hengxing]

is_arch("arm64-v8a", "x86_64")