Merge bitcoin/bitcoin#27061: doc: Document affected gcc versions for -fstack-reuse=none workaround

fa83005a2618abc18f9cd6af96f19fc28aba68d8 doc: Document affected gcc versions for -fstack-reuse=none workaround (MarcoFalke)

Pull request description:

  gcc version(s) 11 and prior won't be fixed, looking at the activity in the bug report. So it seems best to just document gcc 12.1+ as fixed, so that in the future the workaround can be removed once the minimum compiler is gcc12.1.

ACKs for top commit:
  fanquake:
    ACK fa83005a2618abc18f9cd6af96f19fc28aba68d8
  hebasto:
    re-ACK fa83005a2618abc18f9cd6af96f19fc28aba68d8

Tree-SHA512: a19723457eb1925196828a5fafd4e7f75a04f86ffae63cb86679d732c662fd1a22e17fe3c69195a97438ff189ba3ff681be3650cf99aa195d7a3e89cd8ee137c
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fanquake 2023-02-08 14:58:16 +00:00 committed by pasta
parent 6889a8db29
commit f115d9c27f
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@ -957,7 +957,9 @@ if test x$TARGET_OS != xwindows; then
AX_CHECK_COMPILE_FLAG([-fPIC],[PIC_FLAGS="-fPIC"]) AX_CHECK_COMPILE_FLAG([-fPIC],[PIC_FLAGS="-fPIC"])
fi fi
dnl All versions of gcc that we commonly use for building are subject to bug dnl Versions of gcc prior to 12.1 (commit
dnl https://github.com/gcc-mirror/gcc/commit/551aa75778a4c5165d9533cd447c8fc822f583e1)
dnl are subject to a bug, see the gccbug_90348 test case and
dnl https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348. To work around that, set dnl https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348. To work around that, set
dnl -fstack-reuse=none for all gcc builds. (Only gcc understands this flag) dnl -fstack-reuse=none for all gcc builds. (Only gcc understands this flag)
AX_CHECK_COMPILE_FLAG([-fstack-reuse=none],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-reuse=none"]) AX_CHECK_COMPILE_FLAG([-fstack-reuse=none],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-reuse=none"])