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Merge #15983: build with -fstack-reuse=none

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faf38bc056 build with -fstack-reuse=none (MarcoFalke)

Pull request description:

  All versions of gcc that we commonly use for building are subject to bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348. To work around that, set `-fstack-reuse=none` for all builds. See https://github.com/bitcoin/bitcoin/pull/15959#issuecomment-490423900

  This option does not exist for clang https://clang.llvm.org/docs/ClangCommandLineReference.html#target-independent-compilation-options, but it does for gcc https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html

ACKs for commit faf38b:

Tree-SHA512: f5597583402d31ea7b89ac358a6f4a537bbb82a1dde2bd41bac65ee0fd88c7af75ee4c24c6b8eed6b139bf4dbf07ab2987f8fc30fb3eab179cd2d753a8a2a47d
This commit is contained in:
MarcoFalke 2019-05-16 07:43:55 -04:00 committed by pasta
parent 7dee7786b7
commit 7c690ead6b
1 changed files with 4 additions and 0 deletions
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4
configure.ac
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@ -786,6 +786,10 @@ if test x$TARGET_OS != xwindows; then
AX_CHECK_COMPILE_FLAG([-fPIC],[PIC_FLAGS="-fPIC"])
fi
# All versions of gcc that we commonly use for building are subject to bug
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348. To work around that, set
# -fstack-reuse=none for all gcc builds. (Only gcc understands this flag)
AX_CHECK_COMPILE_FLAG([-fstack-reuse=none],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-reuse=none"])
if test x$use_hardening != xno; then
use_hardening=yes
AX_CHECK_COMPILE_FLAG([-Wstack-protector],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wstack-protector"])