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
|
dnl ==========================================================================
dnl
dnl Cairo-specific macros
dnl
dnl ==========================================================================
dnl Usage:
dnl CAIRO_BIGENDIAN
dnl
AC_DEFUN([CAIRO_BIGENDIAN],
[dnl
case $host_os in
darwin*)
AH_VERBATIM([X_BYTE_ORDER],
[
/* Deal with multiple architecture compiles on Mac OS X */
#ifdef __APPLE_CC__
#ifdef __BIG_ENDIAN__
#define WORDS_BIGENDIAN 1
#define FLOAT_WORDS_BIGENDIAN 1
#else
#undef WORDS_BIGENDIAN
#undef FLOAT_WORDS_BIGENDIAN
#endif
#endif
])
;;
*)
AC_C_BIGENDIAN
AX_C_FLOAT_WORDS_BIGENDIAN
;;
esac
])
dnl CAIRO_CHECK_FUNCS_WITH_FLAGS(FUNCTION..., CFLAGS, LIBS
dnl [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl Like AC_CHECK_FUNCS but with additional CFLAGS and LIBS
dnl --------------------------------------------------------------------
AC_DEFUN([CAIRO_CHECK_FUNCS_WITH_FLAGS],
[dnl
_save_cflags="$CFLAGS"
_save_libs="$LIBS"
CFLAGS="$CFLAGS $2"
LIBS="$LIBS $3"
AC_CHECK_FUNCS($1, $4, $5)
CFLAGS="$_save_cflags"
LIBS="$_save_libs"
])
dnl CAIRO_CONFIG_COMMANDS is like AC_CONFIG_COMMANDS, except that:
dnl
dnl 1) It redirects the stdout of the command to the file.
dnl 2) It does not recreate the file if contents didn't change.
dnl
AC_DEFUN([CAIRO_CONFIG_COMMANDS],
[dnl
AC_CONFIG_COMMANDS($1,
[
_config_file=$1
_tmp_file=cairoconf.tmp
AC_MSG_NOTICE([creating $_config_file])
{
$2
} >> "$_tmp_file" ||
AC_MSG_ERROR([failed to write to $_tmp_file])
if cmp -s "$_tmp_file" "$_config_file"; then
AC_MSG_NOTICE([$_config_file is unchanged])
rm -f "$_tmp_file"
else
mv "$_tmp_file" "$_config_file" ||
AC_MSG_ERROR([failed to update $_config_file])
fi
], $3)
])
dnl CAIRO_CC_TRY_LINK_WITH_ENV_SILENT(env-setup, program,
dnl true-action, false-action)
dnl
dnl Compile and link the program with the given environment setup.
dnl The global cairo_cc_flag is set to "yes" or "no" according as
dnl the link succeeded or not. The link step must complete without
dnl warnings or errors to stderr.
dnl
dnl Perform true-action on success and false-action on failure.
dnl The values of CFLAGS, LIBS, LDFLAGS are saved before env-setup
dnl is executed and restored right before the end of the macro.
AC_DEFUN([CAIRO_CC_TRY_LINK_WITH_ENV_SILENT],[dnl
# AC_LANG_PROGRAM() produces a main() w/o args,
# but -Wold-style-definition doesn't like that.
# We need _some_ program so that we don't get
# warnings about empty compilation units, so always
# append a reasonable main().
_compile_program="$2"'
int main(int c, char **v) { (void)c; (void)v; return 0; }'
_save_cflags="$CFLAGS"
_save_ldflags="$LDFLAGS"
_save_libs="$LIBS"
$1
AC_LINK_IFELSE(
[AC_LANG_SOURCE([$_compile_program])],
[cairo_cc_stderr=`test -f conftest.err && cat conftest.err`
cairo_cc_flag=yes],
[cairo_cc_stderr=`test -f conftest.err && cat conftest.err`
cairo_cc_flag=no])
if test "x$cairo_cc_stderr" != "x"; then
cairo_cc_flag=no
fi
if test "x$cairo_cc_flag" = "xyes"; then
ifelse([$3], , :, [$3])
else
ifelse([$4], , :, [$4])
fi
CFLAGS="$_save_cflags"
LDFLAGS="$_save_ldflags"
LIBS="$_save_libs"
])
dnl check compiler flags with a program and no muttering.
AC_DEFUN([CAIRO_CC_TRY_FLAG_SILENT],
[dnl (flags..., optional program, true-action, false-action)
CAIRO_CC_TRY_LINK_WITH_ENV_SILENT([CFLAGS="$CFLAGS $1"],
[$2], [$3], [$4])
])
dnl find a -Werror equivalent
AC_DEFUN([CAIRO_CC_CHECK_WERROR],
[dnl
_test_WERROR=${WERROR+set}
if test "z$_test_WERROR" != zset; then
WERROR=""
for _werror in -Werror -errwarn; do
AC_MSG_CHECKING([whether $CC supports $_werror])
CAIRO_CC_TRY_FLAG_SILENT(
[$_werror],,
[WERROR="$WERROR $_werror"],
[:])
AC_MSG_RESULT($cairo_cc_flag)
done
fi
])
dnl check compiler flags possibly using -Werror if available.
AC_DEFUN([CAIRO_CC_TRY_FLAG],
[dnl (flags..., optional program, true-action, false-action)
CAIRO_CC_CHECK_WERROR
AC_MSG_CHECKING([whether $CC supports $1])
CAIRO_CC_TRY_FLAG_SILENT([$WERROR $1], [$2], [$3], [$4])
AC_MSG_RESULT([$cairo_cc_flag])
])
dnl Usage:
dnl CAIRO_CHECK_NATIVE_ATOMIC_PRIMITIVES
AC_DEFUN([CAIRO_CHECK_NATIVE_ATOMIC_PRIMITIVES],
[dnl
AC_CACHE_CHECK([for native atomic primitives], cairo_cv_atomic_primitives,
[
cairo_cv_atomic_primitives="none"
AC_TRY_LINK([
int atomic_add(int i) { return __sync_fetch_and_add (&i, 1); }
int atomic_cmpxchg(int i, int j, int k) { return __sync_val_compare_and_swap (&i, j, k); }
], [],
cairo_cv_atomic_primitives="gcc-legacy"
)
AC_TRY_LINK([
int atomic_add(int i) { return __atomic_fetch_add(&i, 1, __ATOMIC_SEQ_CST); }
int atomic_cmpxchg(int i, int j, int k) { return __atomic_compare_exchange_n(&i, &j, k, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST); }
], [],
cairo_cv_atomic_primitives="cxx11"
)
if test "x$cairo_cv_atomic_primitives" = "xnone"; then
AC_CHECK_HEADER([atomic_ops.h],
cairo_cv_atomic_primitives="libatomic-ops")
fi
if test "x$cairo_cv_atomic_primitives" = "xnone"; then
AC_CHECK_HEADER([libkern/OSAtomic.h],
cairo_cv_atomic_primitives="OSAtomic")
fi
])
if test "x$cairo_cv_atomic_primitives" = xcxx11; then
AC_DEFINE(HAVE_CXX11_ATOMIC_PRIMITIVES, 1,
[Enable if your compiler supports the GCC __atomic_* atomic primitives])
fi
if test "x$cairo_cv_atomic_primitives" = xgcc-legacy; then
AC_DEFINE(HAVE_GCC_LEGACY_ATOMICS, 1,
[Enable if your compiler supports the legacy GCC __sync_* atomic primitives])
fi
if test "x$cairo_cv_atomic_primitives" = "xlibatomic-ops"; then
AC_DEFINE(HAVE_LIB_ATOMIC_OPS, 1,
[Enable if you have libatomic-ops-dev installed])
fi
if test "x$cairo_cv_atomic_primitives" = xOSAtomic; then
AC_DEFINE(HAVE_OS_ATOMIC_OPS, 1,
[Enable if you have MacOS X atomic operations])
fi
])
dnl Usage:
dnl CAIRO_CHECK_ATOMIC_OP_NEEDS_MEMORY_BARRIER
AC_DEFUN([CAIRO_CHECK_ATOMIC_OP_NEEDS_MEMORY_BARRIER],
[dnl
AC_CACHE_CHECK([whether atomic ops require a memory barrier], cairo_cv_atomic_op_needs_memory_barrier,
[
case $host_cpu in
i?86) cairo_cv_atomic_op_needs_memory_barrier="no" ;;
x86_64) cairo_cv_atomic_op_needs_memory_barrier="no" ;;
arm*) cairo_cv_atomic_op_needs_memory_barrier="yes" ;;
*) cairo_cv_atomic_op_needs_memory_barrier="yes" ;;
esac
])
if test "x$cairo_cv_atomic_op_needs_memory_barrier" = "xyes"; then
AC_DEFINE_UNQUOTED(ATOMIC_OP_NEEDS_MEMORY_BARRIER, 1,
[whether memory barriers are needed around atomic operations])
fi
])
AC_DEFUN([CAIRO_TEXT_WRAP], [m4_text_wrap([$1], [$2],, 78)])
|
