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Build: Enable --noexecstack

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Build ELF executables with a zero length `GNU_STACK`
program header flagged non-executable.

The stack is never executable on SerenityOS regardless
of whether the `GNU_STACK` header is specified.

Specifically defining this header is more explicit,
as absence of this header implies an executable stack
on other systems (Linux).
This commit is contained in:
Brendan Coles 2021-03-19 05:47:23 +00:00 committed by Andreas Kling
parent 5df34f6567
commit 215375f2a5
Notes: sideshowbarker 2024-07-18 21:14:14 +09:00 
Author: https://github.com/bcoles
Commit: https://github.com/SerenityOS/serenity/commit/215375f2a5e
Pull-request: https://github.com/SerenityOS/serenity/pull/5867
1 changed files with 2 additions and 2 deletions
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4
CMakeLists.txt
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@ -146,8 +146,8 @@ endforeach()
set(CMAKE_INSTALL_NAME_TOOL "")
set(CMAKE_SHARED_LIBRARY_SUFFIX ".so")
set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "-shared -Wl,--hash-style=gnu,-z,relro,-z,now")
set(CMAKE_CXX_LINK_FLAGS "-Wl,--hash-style=gnu,-z,relro,-z,now")
set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "-shared -Wl,--hash-style=gnu,-z,relro,-z,now,-z,noexecstack")
set(CMAKE_CXX_LINK_FLAGS "-Wl,--hash-style=gnu,-z,relro,-z,now,-z,noexecstack")
# We disable it completely because it makes cmake very spammy.
# This will need to be revisited when the Loader supports RPATH/RUN_PATH.