Android CMake中如何为共享库设置栈大小？

Hey folks, let's break down this stack size configuration issue in CMake clearly:

为什么共享库/静态库设置/STACK参数无效？ #

First off, the /STACK flag is a Windows link.exe-specific option that defines the initial stack size for an executable. Here's why it doesn't work for shared or static libraries:

• Shared libraries (.dll/.so) aren't standalone executables—they're loaded into a running process, and their code uses the stack of that host process. Setting stack size on the library itself does nothing, since the linker ignores this flag for non-executable targets.
• Static libraries are just collections of object files; they get linked into an executable eventually. The stack size is determined by the final executable, not the static library during its creation.

So the only valid use case for /STACK is with executable targets, which is why your CMAKE_EXE_LINKER_FLAGS_DEBUG setup works as expected.

Android Clang++ Linker: How to Control Stack Size #

Since Android uses the LLVM-based clang++ linker, there's no direct equivalent to /STACK, but we have a reliable way to set stack size for executable targets:

Add this to your CMake configuration to set a 10MB stack size for your Android executable:

set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-z,stack-size=10485760")

The -Wl,-z,stack-size=<size> flag tells the LLVM linker to set the initial stack size (the value is in bytes).

A few important notes for Android development:

• Shared libraries still don't need stack size configuration—they rely entirely on the process that loads them. If your library has code with deep recursion, try optimizing the logic to reduce stack usage instead of relying on stack size tweaks.
• Android has a default system-wide stack limit (usually around 8MB). Even if you set a larger size in your executable, the OS might enforce this limit. You can check the current limit with the getrlimit(RLIMIT_STACK) system call, but modifying it at runtime requires special permissions and isn't recommended for regular apps.

内容的提问来源于stack exchange，提问作者TooLazy