summaryrefslogtreecommitdiff
path: root/configure.ac
blob: aea61ab752fad9c04564ac93bb911703757faf71 (plain)
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
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
# Process this file with autoconf to produce a configure script.

AC_PREREQ([2.67])
AC_INIT([libbsd], m4_esyscmd([./get-version]), [libbsd@lists.freedesktop.org])
AC_CONFIG_SRCDIR([src/strlcpy.c])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([m4])

AM_INIT_AUTOMAKE(
  [1.11]
  [-Wall]
  [foreign]
  [nostdinc]
  [subdir-objects]
  [no-dist-gzip dist-xz]
)
AM_SILENT_RULES([yes])

LIBBSD_ABI_MAJOR=0
LIBBSD_ABI_MINOR=11
LIBBSD_ABI_PATCH=7

LIBBSD_ABI="$LIBBSD_ABI_MAJOR:$LIBBSD_ABI_MINOR:$LIBBSD_ABI_PATCH"
AC_SUBST([LIBBSD_ABI])

# Check and store if we got user supplied variables
user_CFLAGS=${CFLAGS-unset}

# Checks for operating system services and capabilities.
AC_USE_SYSTEM_EXTENSIONS
AC_SYS_LARGEFILE

AM_PROG_AR
LT_INIT
LIBBSD_LINKER_VERSION_SCRIPT

is_windows=no
AS_CASE([$host_os],
  [mingw*], [
    is_windows=yes
  ],
)
AM_CONDITIONAL([OS_WINDOWS], [test "x$is_windows" = "xyes"])

# Checks for programs.
AC_CHECK_TOOL([OBJDUMP], [objdump])
AC_PROG_CC
AC_PROG_SED
AC_PROG_INSTALL
AC_PROG_LN_S

# Set default compiler variables
AS_IF([test "$user_CFLAGS" = unset], [
  LIBBSD_CHECK_COMPILER_FLAG([-Wall])
  LIBBSD_CHECK_COMPILER_FLAG([-Wextra])

  LIBBSD_CHECK_COMPILER_FLAG([-Wbad-function-cast])
  LIBBSD_CHECK_COMPILER_FLAG([-Wc99-c11-compat])
  LIBBSD_CHECK_COMPILER_FLAG([-Wcast-align])
  LIBBSD_CHECK_COMPILER_FLAG([-Wdeclaration-after-statement])
  LIBBSD_CHECK_COMPILER_FLAG([-Wdocumentation])
  LIBBSD_CHECK_COMPILER_FLAG([-Wduplicated-branches])
  LIBBSD_CHECK_COMPILER_FLAG([-Wduplicated-cond])
  LIBBSD_CHECK_COMPILER_FLAG([-Wformat -Wformat-security])
  LIBBSD_CHECK_COMPILER_FLAG([-Wformat=2])
  LIBBSD_CHECK_COMPILER_FLAG([-Winit-self])
  LIBBSD_CHECK_COMPILER_FLAG([-Wlogical-not-parentheses])
  LIBBSD_CHECK_COMPILER_FLAG([-Wlogical-op])
  LIBBSD_CHECK_COMPILER_FLAG([-Wmissing-declarations])
  LIBBSD_CHECK_COMPILER_FLAG([-Wmissing-format-attribute])
  LIBBSD_CHECK_COMPILER_FLAG([-Wmissing-prototypes])
  LIBBSD_CHECK_COMPILER_FLAG([-Wnested-externs])
  LIBBSD_CHECK_COMPILER_FLAG([-Wno-missing-field-initializers])
  LIBBSD_CHECK_COMPILER_FLAG([-Wno-nonnull-compare])
  LIBBSD_CHECK_COMPILER_FLAG([-Wno-tautological-constant-out-of-range-compare])
  LIBBSD_CHECK_COMPILER_FLAG([-Wno-unused-parameter])
  LIBBSD_CHECK_COMPILER_FLAG([-Wnull-dereference])
  LIBBSD_CHECK_COMPILER_FLAG([-Wold-style-definition])
  LIBBSD_CHECK_COMPILER_FLAG([-Wpointer-arith])
  LIBBSD_CHECK_COMPILER_FLAG([-Wregister])
  LIBBSD_CHECK_COMPILER_FLAG([-Wrestrict])
  LIBBSD_CHECK_COMPILER_FLAG([-Wshadow])
  LIBBSD_CHECK_COMPILER_FLAG([-Wshift-negative-value])
  LIBBSD_CHECK_COMPILER_FLAG([-Wsizeof-array-argument])
  LIBBSD_CHECK_COMPILER_FLAG([-Wstrict-prototypes])
  LIBBSD_CHECK_COMPILER_FLAG([-Wswitch-bool])
  LIBBSD_CHECK_COMPILER_FLAG([-Wvla])
  LIBBSD_CHECK_COMPILER_FLAG([-Wwrite-strings])

  CFLAGS="$CFLAGS $LIBBSD_COMPILER_FLAGS"

  AC_ARG_ENABLE([sanitize],
    [AS_HELP_STRING([--enable-sanitize], [enable compiler sanitizer support])],
  [
    LIBBSD_COMPILER_FLAGS=''
    LIBBSD_CHECK_COMPILER_FLAG([-fsanitize=address])
    LIBBSD_CHECK_COMPILER_FLAG([-fsanitize=leak])
    LIBBSD_CHECK_COMPILER_FLAG([-fsanitize=undefined])

    CFLAGS="$CFLAGS $LIBBSD_COMPILER_FLAGS"
    LDFLAGS="$LDFLAGS $LIBBSD_COMPILER_FLAGS"
  ])
])

# Checks for libraries.
AC_CHECK_LIB([testu01], [unif01_CreateExternGenBits],
  [TESTU01_LIBS="-ltestu01"])
AC_SUBST([TESTU01_LIBS])
AM_CONDITIONAL([HAVE_LIBTESTU01],
  [test "x$ac_cv_lib_testu01_unif01_CreateExternGenBits" = "xyes"])

saved_LIBS="$LIBS"
AC_SEARCH_LIBS([MD5Update], [md], [
  AS_IF([test "x$ac_cv_search_MD5Update" != "xnone required"], [
    MD5_LIBS="$MD5_LIBS $ac_cv_search_MD5Update"
    need_transparent_libmd=yes
  ])
], [
  AC_MSG_ERROR([cannot find required MD5 functions in libc or libmd])
])
AC_SEARCH_LIBS([SHA512Update], [md], [
  AS_IF([test "x$ac_cv_search_SHA512Update" != "xnone required"], [
    LIBBSD_LIBS="$LIBBSD_LIBS $ac_cv_search_SHA512Update"
  ])
], [
  AC_MSG_ERROR([cannot find required SHA-2 functions in libc or libmd])
])
LIBS="$saved_LIBS"

AS_CASE([$host_os],
  [*-gnu*], [
    # In old glibc versions (< 2.17) clock_gettime() is in librt.
    saved_LIBS="$LIBS"
    AC_SEARCH_LIBS([clock_gettime], [rt], [
      AS_IF([test "x$ac_cv_search_clock_gettime" != "xnone required"], [
        LIBBSD_LIBS="$LIBBSD_LIBS $ac_cv_search_clock_gettime"
      ])
    ])
    LIBS="$saved_LIBS"
  ],
  [aix*], [
    saved_LIBS="$LIBS"
    AC_SEARCH_LIBS([perfstat_cpu_total], [perfstat], [
      AS_IF([test "x$ac_cv_search_perfstat_cpu_total" != "xnone required"], [
        LIBBSD_LIBS="$LIBBSD_LIBS $ac_cv_search_perfstat_cpu_total"
      ])
    ])
    LIBS="$saved_LIBS"
  ],
)

# Checks for header files.
AC_CHECK_HEADERS([\
  sys/ndir.h \
  sys/dir.h \
  ndir.h \
  dirent.h \
  pwd.h \
  grp.h \
  stdio_ext.h \
  procinfo.h \
])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_INLINE
AC_C_TYPEOF
AC_TYPE_INT64_T
AC_TYPE_MODE_T
AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_UID_T
AC_TYPE_SIZE_T
AC_TYPE_SSIZE_T

AC_CHECK_DECL([F_CLOSEM], [
  AC_DEFINE([HAVE_FCNTL_CLOSEM], [1],
    [Define to 1 if you have fcntl(F_CLOSEM)])
], [], [[
#include <limits.h>
#include <fcntl.h>
]])

AC_CHECK_DECLS([environ], [], [], [[
#include <unistd.h>
]])

LIBBSD_HAS_GNU_INIT_ARRAY

# Checks for library functions.
AC_MSG_CHECKING([for program_invocation_short_name])
AC_LINK_IFELSE([
  AC_LANG_PROGRAM([[
#include <errno.h>
  ]], [[
const char *p = program_invocation_short_name;
  ]])
], [
  AC_DEFINE([HAVE_PROGRAM_INVOCATION_SHORT_NAME], [1],
    [Define to 1 if you have program_invocation_short_name])
  AC_MSG_RESULT([yes])
], [
  AC_MSG_RESULT([no])
])

AC_MSG_CHECKING([for __progname])
AC_LINK_IFELSE([
  AC_LANG_PROGRAM([[
#include <stdio.h>
extern char *__progname;
  ]], [[
printf("%s", __progname);
  ]])
], [
  AC_DEFINE([HAVE___PROGNAME], [1], [Define to 1 if you have __progname])
  AC_MSG_RESULT([yes])
], [
  AC_MSG_RESULT([no])
])

AC_MSG_CHECKING([for __register_atfork])
AC_LINK_IFELSE([
  AC_LANG_PROGRAM([[
#include <stddef.h>
extern void *__dso_handle;
extern int __register_atfork(void (*)(void), void(*)(void), void (*)(void), void *);
  ]], [[
__register_atfork(NULL, NULL, NULL, __dso_handle);
  ]])
], [
  AC_DEFINE([HAVE___REGISTER_ATFORK], [1],
    [Define to 1 if you have __register_atfork])
  AC_MSG_RESULT([yes])
], [
  LIBBSD_LIBS="$LIBBSD_LIBS -pthread"
  AC_MSG_RESULT([no])
])

AC_CHECK_FUNCS([\
  clearenv \
  dirfd \
  flock \
  fopencookie \
  __fpurge \
  funopen \
  getauxval \
  getentropy \
  getexecname \
  getline \
  open_memstream \
  pstat_getproc \
  sysconf \
  uid_from_user \
  gid_from_group \
  user_from_uid \
  group_from_gid \
])

need_arc4random=yes
need_bsd_getopt=yes
need_progname=yes
need_md5=yes
need_nlist=yes
need_strl=yes
need_wcsl=yes
need_strmode=yes
need_id_from_name=yes
need_fpurge=yes
need_funopen=yes
AS_CASE([$host_os],
  [*-gnu*], [
    # On glibc >= 2.38, strlcpy() and strlcat() got added,
    # so these could then be dropped on the next SOVERSION bump.
    #need_strl=no
  ],
  [*-musl*], [
    # On musl >= 0.5.0, strlcpy() and strlcat() were already implemented,
    # so these can then be dropped on the next SOVERSION bump.
    #need_strl=no
    # On musl >= 0.9.7, optreset got implemented, so bsd_getopt() can then
    # be dropped on the next SOVERSION bump.
    #need_bsd_getopt=no
    # On musl >= 1.1.19, fopencookie() got implemented, and because we were
    # checking for its presence to decide whether to build funopen(), it got
    # included in builds even when previously it had not been included, which
    # is partially an ABI issue, but given that disabling it now would be
    # worse, we'll ignore this as this is only a problem with downgrades. And
    # enable it explicitly
    need_funopen=yes
  ],
  [darwin*], [
    # On macOS these are provided by the system, and libbsd has never built
    # there, so we can avoid providing these with no ABI breakage.
    need_arc4random=no
    need_bsd_getopt=no
    need_progname=no
    need_transparent_libmd=no
    need_md5=no
    need_nlist=no
    need_strl=no
    need_wcsl=no
    need_strmode=no
    need_id_from_name=no
    need_fpurge=no
    # On macOS we do not have fopencookie(), and cannot implement it.
    need_funopen=no
  ],
)

AM_CONDITIONAL([HAVE_GETENTROPY], [test "x$ac_cv_func_getentropy" = "xyes"])

AM_CONDITIONAL([NEED_ARC4RANDOM], [test "x$need_arc4random" = "xyes"])
AM_CONDITIONAL([NEED_BSD_GETOPT], [test "x$need_bsd_getopt" = "xyes"])
AM_CONDITIONAL([NEED_PROGNAME], [test "x$need_progname" = "xyes"])
AM_CONDITIONAL([NEED_TRANSPARENT_LIBMD], [test "x$need_transparent_libmd" = "xyes"])
AM_CONDITIONAL([NEED_MD5], [test "x$need_md5" = "xyes"])
AM_CONDITIONAL([NEED_NLIST], [test "x$need_nlist" = "xyes"])
AM_CONDITIONAL([NEED_STRL], [test "x$need_strl" = "xyes"])
AM_CONDITIONAL([NEED_WCSL], [test "x$need_wcsl" = "xyes"])
AM_CONDITIONAL([NEED_STRMODE], [test "x$need_strmode" = "xyes"])
AM_CONDITIONAL([NEED_ID_FROM_NAME], [test "x$need_id_from_name" = "xyes"])
AM_CONDITIONAL([NEED_FPURGE], [test "x$need_fpurge" = "xyes"])
AM_CONDITIONAL([NEED_FUNOPEN], [test "x$need_funopen" = "xyes"])
AS_IF([test "x$need_funopen" = "xno" && \
       test "x$ac_cv_func_funopen" != "xyes" && \
       test "x$ac_cv_func_fopencookie" = "xyes"], [
  AC_MSG_WARN([[can implement funopen() now based on newly added fopencooke(), report upstream]])
])

AC_SUBST([MD5_LIBS])
AC_SUBST([LIBBSD_LIBS])

AC_CONFIG_FILES([
  Makefile
  include/Makefile
  man/Makefile
  src/Makefile
  src/libbsd.pc
  src/libbsd-ctor.pc
  src/libbsd-overlay.pc
  test/Makefile
])
AC_CONFIG_HEADERS([config.h])
AC_OUTPUT