1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
# DP: Add empty distro and hardening specs
Index: gcc/gcc.c
===================================================================
--- a/src/gcc/gcc.c (revision 270858)
+++ a/src/gcc/gcc.c (working copy)
@@ -27,6 +27,11 @@
Once it knows which kind of compilation to perform, the procedure for
compilation is specified by a string called a "spec". */
+/* Inject some default compilation flags which are used as the default.
+ Done by the packaging build system. Should that be done in the headers
+ gcc/config/<arch>/*.h instead? */
+#include "distro-defaults.h"
+
#include "config.h"
#include "system.h"
#include "coretypes.h"
@@ -875,6 +880,69 @@
#define LINK_GCC_C_SEQUENCE_SPEC "%G %{!nolibc:%L %G}"
#endif
+/* Generate full unwind information covering all program points.
+ Only needed for some architectures. */
+#ifndef ASYNC_UNWIND_SPEC
+# ifdef DIST_DEFAULT_ASYNC_UNWIND
+# define ASYNC_UNWIND_SPEC "%{!fno-asynchronous-unwind-tables:-fasynchronous-unwind-tables}"
+# else
+# define ASYNC_UNWIND_SPEC ""
+# endif
+#endif
+
+/* Turn on stack protector.
+ */
+#ifndef SSP_DEFAULT_SPEC
+# ifdef DIST_DEFAULT_SSP
+# ifdef DIST_DEFAULT_SSP_STRONG
+# define SSP_DEFAULT_SPEC " %{!fno-stack-protector:%{!fstack-protector-all:%{!ffreestanding:%{!nostdlib:%{!fstack-protector:-fstack-protector-strong}}}}}"
+# else
+# define SSP_DEFAULT_SPEC " %{!fno-stack-protector:%{!fstack-protector-all:%{!ffreestanding:%{!nostdlib:-fstack-protector}}}}"
+# endif
+# else
+# define SSP_DEFAULT_SPEC ""
+# endif
+#endif
+
+/* Turn on -Wformat -Wformat-security by default for C, C++,
+ ObjC, ObjC++. */
+#ifndef FORMAT_SECURITY_SPEC
+# ifdef DIST_DEFAULT_FORMAT_SECURITY
+# define FORMAT_SECURITY_SPEC " %{!Wformat:%{!Wformat=2:%{!Wformat=0:%{!Wall:-Wformat} %{!Wno-format-security:-Wformat-security}}}}"
+# else
+# define FORMAT_SECURITY_SPEC ""
+# endif
+#endif
+
+/* Enable -fstack-clash-protection by default. Only available
+ on some targets. */
+#ifndef STACK_CLASH_SPEC
+# ifdef DIST_DEFAULT_STACK_CLASH
+# define STACK_CLASH_SPEC " %{!fno-stack-clash-protection:-fstack-clash-protection}"
+# else
+# define STACK_CLASH_SPEC ""
+# endif
+#endif
+
+/* Enable code instrumentation of control-flow transfers.
+ Available on x86 and x86_64. */
+#ifndef CF_PROTECTION_SPEC
+# ifdef DIST_DEFAULT_CF_PROTECTION
+# define CF_PROTECTION_SPEC " %{!fcf-protection*:%{!fno-cf-protection:-fcf-protection}}"
+# else
+# define CF_PROTECTION_SPEC ""
+# endif
+#endif
+
+/* Don't enable any of those for the offload compilers,
+ unsupported. */
+#if !defined(DISTRO_DEFAULT_SPEC) && !defined(ACCEL_COMPILER)
+# define DISTRO_DEFAULT_SPEC ASYNC_UNWIND_SPEC SSP_DEFAULT_SPEC \
+ FORMAT_SECURITY_SPEC STACK_CLASH_SPEC CF_PROTECTION_SPEC
+#else
+# define DISTRO_DEFAULT_SPEC ""
+#endif
+
#ifndef LINK_SSP_SPEC
#ifdef TARGET_LIBC_PROVIDES_SSP
#define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
@@ -1079,6 +1148,7 @@
static const char *cc1_spec = CC1_SPEC;
static const char *cc1plus_spec = CC1PLUS_SPEC;
static const char *link_gcc_c_sequence_spec = LINK_GCC_C_SEQUENCE_SPEC;
+static const char *distro_default_spec = DISTRO_DEFAULT_SPEC;
static const char *link_ssp_spec = LINK_SSP_SPEC;
static const char *asm_spec = ASM_SPEC;
static const char *asm_final_spec = ASM_FINAL_SPEC;
@@ -1136,7 +1206,7 @@
"%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}\
%{f*} %{g*:%{%:debug-level-gt(0):%{g*}\
%{!fno-working-directory:-fworking-directory}}} %{O*}\
- %{undef} %{save-temps*:-fpch-preprocess}";
+ %{undef} %{save-temps*:-fpch-preprocess} %(distro_defaults)";
/* This contains cpp options which are not passed when the preprocessor
output will be used by another program. */
@@ -1319,9 +1389,9 @@
%{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \
%(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\
cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \
- %(cc1_options)}\
+ %(cc1_options)%(distro_defaults)}\
%{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\
- cc1 %(cpp_unique_options) %(cc1_options)}}}\
+ cc1 %(cpp_unique_options) %(cc1_options) %(distro_defaults)}}}\
%{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 1},
{"-",
"%{!E:%e-E or -x required when input is from standard input}\
@@ -1335,18 +1405,18 @@
%{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \
%(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\
cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \
- %(cc1_options)\
+ %(cc1_options) %(distro_defaults)\
%{!fsyntax-only:%{!S:-o %g.s} \
%{!fdump-ada-spec*:%{!o*:--output-pch=%i.gch}\
%W{o*:--output-pch=%*}}%V}}\
%{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\
- cc1 %(cpp_unique_options) %(cc1_options)\
+ cc1 %(cpp_unique_options) %(cc1_options) %(distro_defaults)\
%{!fsyntax-only:%{!S:-o %g.s} \
%{!fdump-ada-spec*:%{!o*:--output-pch=%i.gch}\
%W{o*:--output-pch=%*}}%V}}}}}}}", 0, 0, 0},
{".i", "@cpp-output", 0, 0, 0},
{"@cpp-output",
- "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
+ "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %(distro_defaults) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
{".s", "@assembler", 0, 0, 0},
{"@assembler",
"%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 0, 0},
@@ -1577,6 +1647,7 @@
INIT_STATIC_SPEC ("cc1_options", &cc1_options),
INIT_STATIC_SPEC ("cc1plus", &cc1plus_spec),
INIT_STATIC_SPEC ("link_gcc_c_sequence", &link_gcc_c_sequence_spec),
+ INIT_STATIC_SPEC ("distro_defaults", &distro_default_spec),
INIT_STATIC_SPEC ("link_ssp", &link_ssp_spec),
INIT_STATIC_SPEC ("endfile", &endfile_spec),
INIT_STATIC_SPEC ("link", &link_spec),
Index: gcc/cp/lang-specs.h
===================================================================
--- a/src/gcc/cp/lang-specs.h (revision 270858)
+++ a/src/gcc/cp/lang-specs.h (working copy)
@@ -47,7 +47,7 @@
" cc1plus %{save-temps*|no-integrated-cpp:-fpreprocessed"
" %{save-temps*:%b.ii} %{!save-temps*:%g.ii}}"
" %{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}"
- " %(cc1_options) %2"
+ " %(cc1_options) %(distro_defaults) %2"
" %{!fsyntax-only:%{!S:-o %g.s}"
" %{!fdump-ada-spec*:%{!o*:--output-pch=%i.gch}"
" %W{o*:--output-pch=%*}}%V}}}}",
@@ -60,11 +60,11 @@
" cc1plus %{save-temps*|no-integrated-cpp:-fpreprocessed"
" %{save-temps*:%b.ii} %{!save-temps*:%g.ii}}"
" %{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}"
- " %(cc1_options) %2"
+ " %(cc1_options) %(distro_defaults) %2"
" %{!fsyntax-only:%(invoke_as)}}}}",
CPLUSPLUS_CPP_SPEC, 0, 0},
{".ii", "@c++-cpp-output", 0, 0, 0},
{"@c++-cpp-output",
"%{!E:%{!M:%{!MM:"
- " cc1plus -fpreprocessed %i %(cc1_options) %2"
+ " cc1plus -fpreprocessed %i %(cc1_options) %(distro_defaults) %2"
" %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
Index: gcc/objc/lang-specs.h
===================================================================
--- a/src/gcc/objc/lang-specs.h (revision 270858)
+++ a/src/gcc/objc/lang-specs.h (working copy)
@@ -29,9 +29,9 @@
%{traditional|traditional-cpp:\
%eGNU Objective C no longer supports traditional compilation}\
%{save-temps*|no-integrated-cpp:cc1obj -E %(cpp_options) -o %{save-temps*:%b.mi} %{!save-temps*:%g.mi} \n\
- cc1obj -fpreprocessed %{save-temps*:%b.mi} %{!save-temps*:%g.mi} %(cc1_options) %{print-objc-runtime-info} %{gen-decls}}\
+ cc1obj -fpreprocessed %{save-temps*:%b.mi} %{!save-temps*:%g.mi} %(cc1_options) %(distro_defaults) %{print-objc-runtime-info} %{gen-decls}}\
%{!save-temps*:%{!no-integrated-cpp:\
- cc1obj %(cpp_unique_options) %(cc1_options) %{print-objc-runtime-info} %{gen-decls}}}\
+ cc1obj %(cpp_unique_options) %(cc1_options) %(distro_defaults) %{print-objc-runtime-info} %{gen-decls}}}\
%{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
{"@objective-c-header",
"%{E|M|MM:cc1obj -E %{traditional|traditional-cpp:-traditional-cpp}\
@@ -40,11 +40,11 @@
%{traditional|traditional-cpp:\
%eGNU Objective C no longer supports traditional compilation}\
%{save-temps*|no-integrated-cpp:cc1obj -E %(cpp_options) -o %{save-temps*:%b.mi} %{!save-temps*:%g.mi} \n\
- cc1obj -fpreprocessed %b.mi %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\
+ cc1obj -fpreprocessed %b.mi %(cc1_options) %(distro_defaults) %{print-objc-runtime-info} %{gen-decls}\
-o %g.s %{!o*:--output-pch=%i.gch}\
%W{o*:--output-pch=%*}%V}\
%{!save-temps*:%{!no-integrated-cpp:\
- cc1obj %(cpp_unique_options) %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\
+ cc1obj %(cpp_unique_options) %(cc1_options) %(distro_defaults) %{print-objc-runtime-info} %{gen-decls}\
-o %g.s %{!o*:--output-pch=%i.gch}\
%W{o*:--output-pch=%*}%V}}}}}", 0, 0, 0},
{".mi", "@objective-c-cpp-output", 0, 0, 0},
@@ -53,5 +53,5 @@
%{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
{"@objc-cpp-output",
"%nobjc-cpp-output is deprecated; please use objective-c-cpp-output instead\n\
- %{!M:%{!MM:%{!E:cc1obj -fpreprocessed %i %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\
+ %{!M:%{!MM:%{!E:cc1obj -fpreprocessed %i %(cc1_options) %(distro_defaults) %{print-objc-runtime-info} %{gen-decls}\
%{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
Index: gcc/objcp/lang-specs.h
===================================================================
--- a/src/gcc/objcp/lang-specs.h (revision 270858)
+++ a/src/gcc/objcp/lang-specs.h (working copy)
@@ -36,7 +36,7 @@
%(cpp_options) %2 -o %{save-temps*:%b.mii} %{!save-temps*:%g.mii} \n}\
cc1objplus %{save-temps*|no-integrated-cpp:-fpreprocessed %{save-temps*:%b.mii} %{!save-temps*:%g.mii}}\
%{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}\
- %(cc1_options) %2\
+ %(cc1_options) %(distro_defaults) %2\
-o %g.s %{!o*:--output-pch=%i.gch} %W{o*:--output-pch=%*}%V}}}",
CPLUSPLUS_CPP_SPEC, 0, 0},
{"@objective-c++",
@@ -46,16 +46,16 @@
%(cpp_options) %2 -o %{save-temps*:%b.mii} %{!save-temps*:%g.mii} \n}\
cc1objplus %{save-temps*|no-integrated-cpp:-fpreprocessed %{save-temps*:%b.mii} %{!save-temps*:%g.mii}}\
%{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}\
- %(cc1_options) %2\
+ %(cc1_options) %(distro_defaults) %2\
%{!fsyntax-only:%(invoke_as)}}}}",
CPLUSPLUS_CPP_SPEC, 0, 0},
{".mii", "@objective-c++-cpp-output", 0, 0, 0},
{"@objective-c++-cpp-output",
"%{!M:%{!MM:%{!E:\
- cc1objplus -fpreprocessed %i %(cc1_options) %2\
+ cc1objplus -fpreprocessed %i %(cc1_options) %(distro_defaults) %2\
%{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
{"@objc++-cpp-output",
"%nobjc++-cpp-output is deprecated; please use objective-c++-cpp-output instead\n\
%{!M:%{!MM:%{!E:\
- cc1objplus -fpreprocessed %i %(cc1_options) %2\
+ cc1objplus -fpreprocessed %i %(cc1_options) %(distro_defaults) %2\
%{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
|
