blob: 8dbf2b8452bfa0d6c9b4dead65210f01bc2c3bb5 (
plain) (
blame)
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
|
#! @shell@ -e
path_backup="$PATH"
if [ -n "@coreutils@" ]; then
PATH="@coreutils@/bin:@gnugrep@/bin"
fi
if [ -n "$NIX_CC_WRAPPER_START_HOOK" ]; then
source "$NIX_CC_WRAPPER_START_HOOK"
fi
if [ -z "$NIX_CC_WRAPPER_FLAGS_SET" ]; then
source @out@/nix-support/add-flags.sh
fi
source @out@/nix-support/utils.sh
# Parse command line options and set several variables.
# For instance, figure out if linker flags should be passed.
# GCC prints annoying warnings when they are not needed.
dontLink=0
getVersion=0
nonFlagArgs=0
[[ "@prog@" = *++ ]] && isCpp=1 || isCpp=0
params=("$@")
n=0
while [ $n -lt ${#params[*]} ]; do
p=${params[n]}
p2=${params[$((n+1))]}
if [ "$p" = -c ]; then
dontLink=1
elif [ "$p" = -S ]; then
dontLink=1
elif [ "$p" = -E ]; then
dontLink=1
elif [ "$p" = -E ]; then
dontLink=1
elif [ "$p" = -M ]; then
dontLink=1
elif [ "$p" = -MM ]; then
dontLink=1
elif [[ "$p" = -x && "$p2" = *-header ]]; then
dontLink=1
elif [[ "$p" = -x && "$p2" = c++* && "$isCpp" = 0 ]]; then
isCpp=1
elif [ "$p" = -nostdlib ]; then
isCpp=-1
elif [ "${p:0:1}" != - ]; then
nonFlagArgs=1
elif [ "$p" = -m32 ]; then
if [ -e @out@/nix-support/dynamic-linker-m32 ]; then
NIX_LDFLAGS="$NIX_LDFLAGS -dynamic-linker $(cat @out@/nix-support/dynamic-linker-m32)"
fi
fi
n=$((n + 1))
done
# If we pass a flag like -Wl, then gcc will call the linker unless it
# can figure out that it has to do something else (e.g., because of a
# "-c" flag). So if no non-flag arguments are given, don't pass any
# linker flags. This catches cases like "gcc" (should just print
# "gcc: no input files") and "gcc -v" (should print the version).
if [ "$nonFlagArgs" = 0 ]; then
dontLink=1
fi
# Optionally filter out paths not refering to the store.
if [ "$NIX_ENFORCE_PURITY" = 1 -a -n "$NIX_STORE" ]; then
rest=()
n=0
while [ $n -lt ${#params[*]} ]; do
p=${params[n]}
p2=${params[$((n+1))]}
if [ "${p:0:3}" = -L/ ] && badPath "${p:2}"; then
skip $p
elif [ "$p" = -L ] && badPath "$p2"; then
n=$((n + 1)); skip $p2
elif [ "${p:0:3}" = -I/ ] && badPath "${p:2}"; then
skip $p
elif [ "$p" = -I ] && badPath "$p2"; then
n=$((n + 1)); skip $p2
elif [ "$p" = -isystem ] && badPath "$p2"; then
n=$((n + 1)); skip $p2
else
rest+=("$p")
fi
n=$((n + 1))
done
params=("${rest[@]}")
fi
# Clear march/mtune=native -- they bring impurity.
if [ "$NIX_ENFORCE_NO_NATIVE" = 1 ]; then
rest=()
for i in "${params[@]}"; do
if [[ "$i" = -m*=native ]]; then
skip $i
else
rest+=("$i")
fi
done
params=("${rest[@]}")
fi
if [[ "$isCpp" = 1 ]]; then
NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE ${NIX_CXXSTDLIB_COMPILE-@default_cxx_stdlib_compile@}"
NIX_CFLAGS_LINK="$NIX_CFLAGS_LINK $NIX_CXXSTDLIB_LINK"
fi
LD=@ldPath@/ld
source @out@/nix-support/add-hardening.sh
# Add the flags for the C compiler proper.
extraAfter=($NIX_CFLAGS_COMPILE ${hardeningCFlags[@]})
extraBefore=()
if [ "$dontLink" != 1 ]; then
# Add the flags that should only be passed to the compiler when
# linking.
extraAfter+=($NIX_CFLAGS_LINK ${hardeningLDFlags[@]})
# Add the flags that should be passed to the linker (and prevent
# `ld-wrapper' from adding NIX_LDFLAGS again).
for i in $NIX_LDFLAGS_BEFORE; do
extraBefore=(${extraBefore[@]} "-Wl,$i")
done
for i in $NIX_LDFLAGS; do
if [ "${i:0:3}" = -L/ ]; then
extraAfter+=("$i")
else
extraAfter+=("-Wl,$i")
fi
done
export NIX_LDFLAGS_SET=1
fi
# As a very special hack, if the arguments are just `-v', then don't
# add anything. This is to prevent `gcc -v' (which normally prints
# out the version number and returns exit code 0) from printing out
# `No input files specified' and returning exit code 1.
if [ "$*" = -v ]; then
extraAfter=()
extraBefore=()
fi
# Optionally print debug info.
if [ -n "$NIX_DEBUG" ]; then
echo "original flags to @prog@:" >&2
for i in "${params[@]}"; do
echo " $i" >&2
done
echo "extraBefore flags to @prog@:" >&2
for i in ${extraBefore[@]}; do
echo " $i" >&2
done
echo "extraAfter flags to @prog@:" >&2
for i in ${extraAfter[@]}; do
echo " $i" >&2
done
fi
if [ -n "$NIX_CC_WRAPPER_EXEC_HOOK" ]; then
source "$NIX_CC_WRAPPER_EXEC_HOOK"
fi
PATH="$path_backup"
exec @prog@ ${extraBefore[@]} "${params[@]}" "${extraAfter[@]}"
|