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Disable ssp on -nostdlib, -nodefaultlibs and -ffreestanding
https://bugs.gentoo.org/484714
--- a/gcc/gcc.c 2017-07-04 09:15:57.740793000 +0200
+++ b/gcc/gcc.c 2018-03-02 13:58:44.387741114 +0100
@@ -857,6 +857,12 @@ proper position among the other output f
#define LINK_GCC_C_SEQUENCE_SPEC "%G %L %G"
#endif
+#ifdef ENABLE_DEFAULT_SSP
+#define NO_SSP_SPEC "%{nostdlib|nodefaultlibs|ffreestanding:-fno-stack-protector} "
+#else
+#define NO_SSP_SPEC ""
+#endif
+
#ifndef LINK_SSP_SPEC
#ifdef TARGET_LIBC_PROVIDES_SSP
#define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
@@ -1131,7 +1148,7 @@ static const char *cc1_options =
%{-version:--version}\
%{-help=*:--help=%*}\
%{!fsyntax-only:%{S:%W{o*}%{!o*:-o %b.s}}}\
- %{fsyntax-only:-o %j} %{-param*}\
+ %{fsyntax-only:-o %j} %{-param*} " NO_SSP_SPEC "\
%{coverage:-fprofile-arcs -ftest-coverage}\
%{fprofile-arcs|fprofile-generate*|coverage:\
%{!fprofile-update=singel:\
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