[flang-commits] [flang] 179badc - [flang][docs] Add a mention about -fsafe-trampoline to FAQ.md (#207656)

[via flang-commits]

Author: Yusuke MINATO
Date: 2026-07-08T20:08:40+09:00
New Revision: 179badc020b48f736341408fdb01537ada3eedfb

URL: https://github.com/llvm/llvm-project/commit/179badc020b48f736341408fdb01537ada3eedfb
DIFF: https://github.com/llvm/llvm-project/commit/179badc020b48f736341408fdb01537ada3eedfb.diff

LOG: [flang][docs] Add a mention about -fsafe-trampoline to FAQ.md (#207656)

Co-authored-by: Tarun Prabhu <tarunprabhu at gmail.com>

Added: 
    

Modified: 
    flang/docs/FAQ.md

Removed: 
    


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diff  --git a/flang/docs/FAQ.md b/flang/docs/FAQ.md
index 0b0b6ebdacf0b..c220d469380ce 100644
--- a/flang/docs/FAQ.md
+++ b/flang/docs/FAQ.md
@@ -50,3 +50,7 @@ ld.lld: error: src.o: requires an executable stack, but -z execstack is not spec
 flang-22: error: linker command failed with exit code 1 (use -v to see invocation)
 $ flang src.f90 -fuse-ld=lld -Wl,-z,execstack
 ```
+
+Since LLVM 23, Flang has a new compiler flag `-fsafe-trampoline`, which is disabled by default and is currently supported on x86-64 and AArch64 targets.
+If this is enabled, the trampoline is generated on a dedicated `mmap`'d region instead of the stack.
+Where supported, we recommend using this flag to reduce the security risk of an executable stack.