diff options
Diffstat (limited to 'm4')
-rw-r--r-- | m4/openssh.m4 | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/m4/openssh.m4 b/m4/openssh.m4 new file mode 100644 index 000000000..6a49f10fa --- /dev/null +++ b/m4/openssh.m4 | |||
@@ -0,0 +1,199 @@ | |||
1 | dnl OpenSSH-specific autoconf macros | ||
2 | dnl | ||
3 | |||
4 | dnl OSSH_CHECK_CFLAG_COMPILE(check_flag[, define_flag]) | ||
5 | dnl Check that $CC accepts a flag 'check_flag'. If it is supported append | ||
6 | dnl 'define_flag' to $CFLAGS. If 'define_flag' is not specified, then append | ||
7 | dnl 'check_flag'. | ||
8 | AC_DEFUN([OSSH_CHECK_CFLAG_COMPILE], [{ | ||
9 | AC_MSG_CHECKING([if $CC supports compile flag $1]) | ||
10 | saved_CFLAGS="$CFLAGS" | ||
11 | CFLAGS="$CFLAGS $WERROR $1" | ||
12 | _define_flag="$2" | ||
13 | test "x$_define_flag" = "x" && _define_flag="$1" | ||
14 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ | ||
15 | #include <stdlib.h> | ||
16 | #include <stdio.h> | ||
17 | int main(int argc, char **argv) { | ||
18 | (void)argv; | ||
19 | /* Some math to catch -ftrapv problems in the toolchain */ | ||
20 | int i = 123 * argc, j = 456 + argc, k = 789 - argc; | ||
21 | float l = i * 2.1; | ||
22 | double m = l / 0.5; | ||
23 | long long int n = argc * 12345LL, o = 12345LL * (long long int)argc; | ||
24 | printf("%d %d %d %f %f %lld %lld\n", i, j, k, l, m, n, o); | ||
25 | /* | ||
26 | * Test fallthrough behaviour. clang 10's -Wimplicit-fallthrough does | ||
27 | * not understand comments and we don't use the "fallthrough" attribute | ||
28 | * that it's looking for. | ||
29 | */ | ||
30 | switch(i){ | ||
31 | case 0: j += i; | ||
32 | /* FALLTHROUGH */ | ||
33 | default: j += k; | ||
34 | } | ||
35 | exit(0); | ||
36 | } | ||
37 | ]])], | ||
38 | [ | ||
39 | if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null | ||
40 | then | ||
41 | AC_MSG_RESULT([no]) | ||
42 | CFLAGS="$saved_CFLAGS" | ||
43 | else | ||
44 | AC_MSG_RESULT([yes]) | ||
45 | CFLAGS="$saved_CFLAGS $_define_flag" | ||
46 | fi], | ||
47 | [ AC_MSG_RESULT([no]) | ||
48 | CFLAGS="$saved_CFLAGS" ] | ||
49 | ) | ||
50 | }]) | ||
51 | |||
52 | dnl OSSH_CHECK_CFLAG_LINK(check_flag[, define_flag]) | ||
53 | dnl Check that $CC accepts a flag 'check_flag'. If it is supported append | ||
54 | dnl 'define_flag' to $CFLAGS. If 'define_flag' is not specified, then append | ||
55 | dnl 'check_flag'. | ||
56 | AC_DEFUN([OSSH_CHECK_CFLAG_LINK], [{ | ||
57 | AC_MSG_CHECKING([if $CC supports compile flag $1 and linking succeeds]) | ||
58 | saved_CFLAGS="$CFLAGS" | ||
59 | CFLAGS="$CFLAGS $WERROR $1" | ||
60 | _define_flag="$2" | ||
61 | test "x$_define_flag" = "x" && _define_flag="$1" | ||
62 | AC_LINK_IFELSE([AC_LANG_SOURCE([[ | ||
63 | #include <stdlib.h> | ||
64 | #include <stdio.h> | ||
65 | int main(int argc, char **argv) { | ||
66 | (void)argv; | ||
67 | /* Some math to catch -ftrapv problems in the toolchain */ | ||
68 | int i = 123 * argc, j = 456 + argc, k = 789 - argc; | ||
69 | float l = i * 2.1; | ||
70 | double m = l / 0.5; | ||
71 | long long int n = argc * 12345LL, o = 12345LL * (long long int)argc; | ||
72 | long long int p = n * o; | ||
73 | printf("%d %d %d %f %f %lld %lld %lld\n", i, j, k, l, m, n, o, p); | ||
74 | exit(0); | ||
75 | } | ||
76 | ]])], | ||
77 | [ | ||
78 | if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null | ||
79 | then | ||
80 | AC_MSG_RESULT([no]) | ||
81 | CFLAGS="$saved_CFLAGS" | ||
82 | else | ||
83 | AC_MSG_RESULT([yes]) | ||
84 | CFLAGS="$saved_CFLAGS $_define_flag" | ||
85 | fi], | ||
86 | [ AC_MSG_RESULT([no]) | ||
87 | CFLAGS="$saved_CFLAGS" ] | ||
88 | ) | ||
89 | }]) | ||
90 | |||
91 | dnl OSSH_CHECK_LDFLAG_LINK(check_flag[, define_flag]) | ||
92 | dnl Check that $LD accepts a flag 'check_flag'. If it is supported append | ||
93 | dnl 'define_flag' to $LDFLAGS. If 'define_flag' is not specified, then append | ||
94 | dnl 'check_flag'. | ||
95 | AC_DEFUN([OSSH_CHECK_LDFLAG_LINK], [{ | ||
96 | AC_MSG_CHECKING([if $LD supports link flag $1]) | ||
97 | saved_LDFLAGS="$LDFLAGS" | ||
98 | LDFLAGS="$LDFLAGS $WERROR $1" | ||
99 | _define_flag="$2" | ||
100 | test "x$_define_flag" = "x" && _define_flag="$1" | ||
101 | AC_LINK_IFELSE([AC_LANG_SOURCE([[ | ||
102 | #include <stdlib.h> | ||
103 | #include <stdio.h> | ||
104 | int main(int argc, char **argv) { | ||
105 | (void)argv; | ||
106 | /* Some math to catch -ftrapv problems in the toolchain */ | ||
107 | int i = 123 * argc, j = 456 + argc, k = 789 - argc; | ||
108 | float l = i * 2.1; | ||
109 | double m = l / 0.5; | ||
110 | long long int n = argc * 12345LL, o = 12345LL * (long long int)argc; | ||
111 | long long p = n * o; | ||
112 | printf("%d %d %d %f %f %lld %lld %lld\n", i, j, k, l, m, n, o, p); | ||
113 | exit(0); | ||
114 | } | ||
115 | ]])], | ||
116 | [ | ||
117 | if $ac_cv_path_EGREP -i "unrecognized option|warning.*ignored" conftest.err >/dev/null | ||
118 | then | ||
119 | AC_MSG_RESULT([no]) | ||
120 | LDFLAGS="$saved_LDFLAGS" | ||
121 | else | ||
122 | AC_MSG_RESULT([yes]) | ||
123 | LDFLAGS="$saved_LDFLAGS $_define_flag" | ||
124 | fi ], | ||
125 | [ AC_MSG_RESULT([no]) | ||
126 | LDFLAGS="$saved_LDFLAGS" ] | ||
127 | ) | ||
128 | }]) | ||
129 | |||
130 | dnl OSSH_CHECK_HEADER_FOR_FIELD(field, header, symbol) | ||
131 | dnl Does AC_EGREP_HEADER on 'header' for the string 'field' | ||
132 | dnl If found, set 'symbol' to be defined. Cache the result. | ||
133 | dnl TODO: This is not foolproof, better to compile and read from there | ||
134 | AC_DEFUN([OSSH_CHECK_HEADER_FOR_FIELD], [ | ||
135 | # look for field '$1' in header '$2' | ||
136 | dnl This strips characters illegal to m4 from the header filename | ||
137 | ossh_safe=`echo "$2" | sed 'y%./+-%__p_%'` | ||
138 | dnl | ||
139 | ossh_varname="ossh_cv_$ossh_safe""_has_"$1 | ||
140 | AC_MSG_CHECKING(for $1 field in $2) | ||
141 | AC_CACHE_VAL($ossh_varname, [ | ||
142 | AC_EGREP_HEADER($1, $2, [ dnl | ||
143 | eval "$ossh_varname=yes" dnl | ||
144 | ], [ dnl | ||
145 | eval "$ossh_varname=no" dnl | ||
146 | ]) dnl | ||
147 | ]) | ||
148 | ossh_result=`eval 'echo $'"$ossh_varname"` | ||
149 | if test -n "`echo $ossh_varname`"; then | ||
150 | AC_MSG_RESULT($ossh_result) | ||
151 | if test "x$ossh_result" = "xyes"; then | ||
152 | AC_DEFINE($3, 1, [Define if you have $1 in $2]) | ||
153 | fi | ||
154 | else | ||
155 | AC_MSG_RESULT(no) | ||
156 | fi | ||
157 | ]) | ||
158 | |||
159 | dnl Check for socklen_t: historically on BSD it is an int, and in | ||
160 | dnl POSIX 1g it is a type of its own, but some platforms use different | ||
161 | dnl types for the argument to getsockopt, getpeername, etc. So we | ||
162 | dnl have to test to find something that will work. | ||
163 | AC_DEFUN([TYPE_SOCKLEN_T], | ||
164 | [ | ||
165 | AC_CHECK_TYPE([socklen_t], ,[ | ||
166 | AC_MSG_CHECKING([for socklen_t equivalent]) | ||
167 | AC_CACHE_VAL([curl_cv_socklen_t_equiv], | ||
168 | [ | ||
169 | # Systems have either "struct sockaddr *" or | ||
170 | # "void *" as the second argument to getpeername | ||
171 | curl_cv_socklen_t_equiv= | ||
172 | for arg2 in "struct sockaddr" void; do | ||
173 | for t in int size_t unsigned long "unsigned long"; do | ||
174 | AC_TRY_COMPILE([ | ||
175 | #include <sys/types.h> | ||
176 | #include <sys/socket.h> | ||
177 | |||
178 | int getpeername (int, $arg2 *, $t *); | ||
179 | ],[ | ||
180 | $t len; | ||
181 | getpeername(0,0,&len); | ||
182 | ],[ | ||
183 | curl_cv_socklen_t_equiv="$t" | ||
184 | break | ||
185 | ]) | ||
186 | done | ||
187 | done | ||
188 | |||
189 | if test "x$curl_cv_socklen_t_equiv" = x; then | ||
190 | AC_MSG_ERROR([Cannot find a type to use in place of socklen_t]) | ||
191 | fi | ||
192 | ]) | ||
193 | AC_MSG_RESULT($curl_cv_socklen_t_equiv) | ||
194 | AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv, | ||
195 | [type to use in place of socklen_t if not defined])], | ||
196 | [#include <sys/types.h> | ||
197 | #include <sys/socket.h>]) | ||
198 | ]) | ||
199 | |||