1 files changed, 48 insertions, 0 deletions
diff --git a/debian/patches/gcc-distro-specs-doc.diff b/debian/patches/gcc-distro-specs-doc.diff
new file mode 100644
index 0000000..06ca84f
--- /dev/null
+++ b/debian/patches/gcc-distro-specs-doc.diff
@@ -0,0 +1,48 @@
+# DP: Document distro specific compiler flags turned on by default
+
+--- a/src/gcc/doc/invoke.texi
++++ b/src/gcc/doc/invoke.texi
+@@ -10967,6 +10967,11 @@ branch target registers within any basic
+ Optimize the prologue of variadic argument functions with respect to usage of
+ those arguments.
+ 
++NOTE: In Ubuntu 14.10 and later versions,
++@option{-fstack-protector-strong} is enabled by default for C,
++C++, ObjC, ObjC++, if none of @option{-fno-stack-protector},
++@option{-nostdlib}, nor @option{-ffreestanding} are found.
++
+ @item -fsection-anchors
+ @opindex fsection-anchors
+ Try to reduce the number of symbolic address calculations by using
+@@ -11591,6 +11596,9 @@ value of a shared integer constant.
+ The minimum size of buffers (i.e.@: arrays) that receive stack smashing
+ protection when @option{-fstack-protection} is used.
+ 
++This default before Ubuntu 10.10 was "8". Currently it is "4", to increase
++the number of functions protected by the stack protector.
++
+ @item min-size-for-stack-sharing
+ The minimum size of variables taking part in stack slot sharing when not
+ optimizing.
+@@ -12732,6 +12740,10 @@ which functions and calls should be skip
+ Currently the x86 GNU/Linux target provides an implementation based
+ on Intel Control-flow Enforcement Technology (CET).
+ 
++NOTE: In Ubuntu 19.10 and later versions, @option{-fcf-protection}
++is enabled by default for C, C++, ObjC, ObjC++, if none of
++@option{-fno-cf-protection} nor @option{-fcf-protection=*} are found.
++
+ @item -fstack-protector
+ @opindex fstack-protector
+ Emit extra code to check for buffer overflows, such as stack smashing
+@@ -12814,6 +12826,10 @@ allocations.  @option{-fstack-clash-prot
+ protection for static stack allocations if the target supports
+ @option{-fstack-check=specific}.
+ 
++NOTE: In Ubuntu 19.10 and later versions,
++@option{-fstack-clash-protection} is enabled by default for C,
++C++, ObjC, ObjC++, unless @option{-fno-stack-clash-protection} is found.
++
+ @item -fstack-limit-register=@var{reg}
+ @itemx -fstack-limit-symbol=@var{sym}
+ @itemx -fno-stack-limit