1#	$NetBSD: configure.ac,v 1.107 2023/07/20 16:21:23 lukem Exp $
2#
3# Autoconf definition file for libnbcompat.
4#
5# When you edit configure.ac:
6# 0. Create the tools versions of autoconf and autoheader:
7#        cd ${SRCDIR} && ./build.sh -V MKMAINTAINERTOOLS=yes tools
8#    (This might not work if you try it after editing configure.ac.)
9# 1. edit configure.ac
10# 2. Regenerate "configure" and "nbtool_config.h.in" from "configure.ac":
11#        cd ${SRCDIR}/tools/compat && ${TOOLDIR}/bin/nbmake-${MACHINE} regen
12#    (Please don't use a non-tools version of autoconf or autoheader.)
13# 3. Test that the tools still build:
14#        mv ${TOOLDIR} ${TOOLDIR}.bak
15#        cd ${SRCDIR} && ./build.sh -V MKMAINTAINERTOOLS=yes tools
16# 4. cvs commit files that you edited.
17# 5. Regen again, to pick up changed RCS IDs from the above commit:
18#        cd ${SRCDIR}/tools/compat && ${TOOLDIR}/bin/nbmake-${MACHINE} regen
19# 6. cvs commit files that were generated.
20#
21
22AC_INIT([libnbcompat], [noversion], [lib-bug-people@NetBSD.org])
23AC_CONFIG_HEADERS([nbtool_config.h])
24AC_CONFIG_FILES([defs.mk])
25AC_CONFIG_MACRO_DIR([buildaux])
26
27m4_pattern_forbid([^AX_])
28m4_pattern_forbid([^NB_])
29
30# Autoheader header and footer
31AH_TOP([/*      $][NetBSD$    */
32 
33#ifndef __NETBSD_NBTOOL_CONFIG_H__
34#define __NETBSD_NBTOOL_CONFIG_H__])
35
36AH_BOTTOM([#include "compat_defs.h"
37#endif /* !__NETBSD_NBTOOL_CONFIG_H__ */])
38
39AC_DEFUN([NB_NETBSD], [dnl
40      AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
41      AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
42      AC_MSG_CHECKING([for NetBSD])
43      AC_EGREP_CPP(yes,
44      [#ifdef __NetBSD__
45	yes
46	#endif
47	],
48	[AC_MSG_RESULT([yes])
49	 AC_DEFINE([_POSIX_SOURCE], 1, [Define for NetBSD headers.])
50	 AC_DEFINE([_POSIX_C_SOURCE], 200112L, [Define for NetBSD headers.])
51	 AC_DEFINE([_XOPEN_SOURCE], 600, [Define for NetBSD headers.])],
52	[AC_MSG_RESULT([no])])
53])dnl NB_NETBSD
54
55NB_NETBSD()
56AC_PATH_PROG(BSHELL, sh, )
57if test x"$BSHELL" = x; then
58	AC_MSG_ERROR([sh must be somewhere on \$PATH])
59fi
60AC_DEFINE_UNQUOTED([PATH_BSHELL], "$BSHELL", [Path to sh(1).])
61
62AC_C_BIGENDIAN()
63AC_HEADER_STDC()
64
65# Confirm existence of zlib.  (This is available as a default install
66# option on many OS's; this could be added as a reachover build in the
67# future.)
68AC_CHECK_HEADER(zlib.h,,
69	AC_MSG_ERROR([zlib must be installed in a compiler-visible path]))
70AC_CHECK_LIB(z, gzdopen,,
71	AC_MSG_ERROR([zlib must be installed in a compiler-visible path]))
72
73# Make sure certain required headers are available.
74# These are not necessarily required by the code, but they are not
75# currently conditionalized.
76AC_CHECK_HEADERS(sys/ioctl.h sys/mman.h sys/param.h \
77	sys/socket.h sys/stat.h sys/time.h sys/types.h sys/utsname.h \
78	sys/wait.h assert.h ctype.h errno.h fcntl.h grp.h limits.h locale.h \
79	netdb.h pwd.h signal.h stdarg.h stdio.h stdlib.h string.h \
80	termios.h unistd.h,,
81	AC_MSG_ERROR([standard system header file not found]))
82
83# Find headers that may not be available.
84AC_HEADER_DIRENT()
85AC_CHECK_HEADERS(sys/mtio.h sys/sysmacros.h sys/syslimits.h stdio_ext.h \
86	getopt.h features.h malloc.h sys/poll.h pthread.h stddef.h sys/uio.h)
87AC_CHECK_HEADERS(sys/bswap.h machine/bswap.h sys/cdefs.h machine/endian.h \
88	sys/endian.h sys/featuretest.h err.h inttypes.h libgen.h paths.h \
89	libgen.h stdint.h util.h resolv.h arpa/nameser.h,,
90	[test -f include/$ac_header || touch include/$ac_header])
91AC_CHECK_HEADERS(rpc/types.h,,
92	[echo '#include "nbtool_config.h"' >include/$ac_header.new
93	echo '#include "'$srcdir/../../common/include/$ac_header'"' \
94		>>include/$ac_header.new
95	if cmp include/$ac_header.new include/$ac_header >/dev/null 2>&1; then
96		rm -f include/$ac_header.new
97	else
98		mv -f include/$ac_header.new include/$ac_header
99	fi])
100AC_CHECK_HEADERS(netconfig.h,,
101	[echo '#include "nbtool_config.h"' >include/$ac_header.new
102	echo '#include "'$srcdir/../../include/$ac_header'"' \
103		>>include/$ac_header.new
104	if cmp include/$ac_header.new include/$ac_header >/dev/null 2>&1; then
105		rm -f include/$ac_header.new
106	else
107		mv -f include/$ac_header.new include/$ac_header
108	fi])
109
110# Typedefs.
111AC_TYPE_SIZE_T()
112AC_CHECK_TYPES([id_t, long long, u_long, u_char, u_short, u_int, u_quad_t])
113AC_CHECK_TYPES([uchar_t, ushort_t, uint_t, ulong_t])
114AC_CHECK_TYPE(socklen_t, [AC_DEFINE([HAVE_SOCKLEN_T], 1,
115			  [Define if you have the socklen_t type.])],,
116[#include <sys/types.h>
117#ifdef HAVE_RPC_TYPES_H
118#include <rpc/types.h>
119#endif
120#include <sys/socket.h>])
121
122AC_MSG_CHECKING([for enum uio_rw])
123AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
124#include <sys/types.h>
125#ifdef HAVE_SYS_UIO_H
126#include <sys/uio.h>
127#endif]],
128[[enum uio_rw rw;]])],
129[AC_MSG_RESULT(yes)
130 AC_DEFINE([HAVE_ENUM_UIO_RW], 1,
131    [Define if you have the enum uio_rw type.])],
132[AC_MSG_RESULT(no)])
133
134AC_MSG_CHECKING([for enum uio_seg])
135AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
136#include <sys/types.h>
137#ifdef HAVE_SYS_UIO_H
138#include <sys/uio.h>
139#endif]],
140[[enum uio_seg seg;]])],
141[AC_MSG_RESULT(yes)
142 AC_DEFINE([HAVE_ENUM_UIO_SEG], 1,
143    [Define if you have the enum uio_seg type.])],
144[AC_MSG_RESULT(no)])
145
146dnl XXX - This is UGLY.  Need a better way to homogenize the bitsized types,
147dnl including use of compiler primitive types via AC_CHECK_SIZEOF.
148dnl
149AC_DEFUN([NB_CHECK_INTTYPE], [dnl
150	AC_CHECK_TYPE(uint][$1][_t,, [
151		AC_CHECK_TYPE(u_int][$1][_t,
152			AC_DEFINE(uint][$1][_t, u_int][$1][_t, \
153			          [Define if you have u_int][$1][_t, but not uint][$1][_t.]),
154			AC_MSG_ERROR([cannot find a suitable type for uint][$1][_t]))
155	])
156	AC_CHECK_TYPE(u_int][$1][_t,, [
157		AC_CHECK_TYPE(uint][$1][_t,
158			AC_DEFINE(u_int][$1][_t, uint][$1][_t, \
159				  [Define if you have uint][$1][_t, but not u_int][$1][_t.]),
160			AC_MSG_ERROR([cannot find a suitable type for u_int][$1][_t]))
161	])
162])dnl NB_CHECK_INTTYPE
163
164NB_CHECK_INTTYPE(8)
165NB_CHECK_INTTYPE(16)
166NB_CHECK_INTTYPE(32)
167NB_CHECK_INTTYPE(64)
168
169# Struct members.
170AC_CHECK_MEMBERS([DIR.dd_fd, DIR.__dd_fd, struct dirent.d_namlen],,,
171[#include <sys/types.h>
172#include <dirent.h>])
173AC_CHECK_MEMBERS([struct stat.st_flags, struct stat.st_gen,
174	struct stat.st_birthtime, struct stat.st_birthtimensec,
175	struct stat.st_atim, struct stat.st_mtimensec],,, 
176	[#include <sys/stat.h>])
177AC_CHECK_MEMBERS(struct statvfs.f_iosize,,, [#include <sys/statvfs.h>])
178AC_CHECK_MEMBERS(struct tm.tm_gmtoff,,, [#include <time.h>])
179
180# Global variable decls.
181AC_CHECK_DECLS([asprintf, asnprintf, vasprintf, vasnprintf, vsnprintf, fgetln, fparseln,
182	fpurge, getdelim, getline, snprintf],,, [
183#include <stdio.h>
184])
185
186AC_CHECK_DECLS([atoll, heapsort, mkdtemp, mkstemp, reallocarr, reallocarray,
187	getsubopt, setenv, strtoi, strtoll, strtou, setprogname,
188	getprogname],,, [
189#include <stdlib.h>
190])
191
192AC_CHECK_DECLS([basename, dirname],,, [
193#include <libgen.h>
194])
195
196AC_CHECK_DECLS([raise_default_signal],,, [
197#include <util.h>
198])
199
200AC_CHECK_DECLS([issetugid, pread, pwrite],,, [
201#include <unistd.h>
202])
203
204AC_CHECK_DECLS([strmode],,, [
205#include <unistd.h>
206#include <string.h>
207])
208
209AC_CHECK_DECLS([isblank],,, [
210#include <ctype.h>
211])
212
213
214AC_CHECK_DECLS([optind, optreset],,, [
215#include <stdio.h>
216#include <stdlib.h>
217#include <unistd.h>
218#ifdef HAVE_GETOPT_H
219#include <getopt.h>
220#endif
221])
222AC_CHECK_DECLS(sys_signame,,, [#include <signal.h>])
223
224# Library functions (where a .h check isn't enough).
225AC_FUNC_ALLOCA()
226AC_CHECK_FUNCS(atoll asprintf asnprintf basename devname dirfd dirname \
227	dispatch_semaphore_create \
228	dprintf esetfunc fgetln flock fpurge __fpurge futimes getline \
229	getopt getopt_long group_from_gid gid_from_group \
230	heapsort isblank issetugid lchflags lchmod lchown lutimes mkstemp \
231	mkdtemp poll posix_spawn pread putc_unlocked pwcache_userdb pwcache_groupdb \
232	pwrite raise_default_signal random reallocarr reallocarray setenv \
233	setgroupent setprogname setpassent \
234	snprintb_m snprintf strlcat strlcpy strmode \
235	strcasecmp strncasecmp strndup strnlen strsep strsuftoll strtoi \
236	strtoll strtou \
237	user_from_uid uid_from_user vasprintf vasnprintf vsnprintf)
238
239AC_CHECK_DECLS([user_from_uid, uid_from_user, pwcache_userdb],,,[
240#include <pwd.h>
241])
242AC_CHECK_DECLS([group_from_gid, gid_from_group, pwcache_groupdb],,,[
243#include <grp.h>
244])
245AC_CHECK_DECLS([strcasecmp, strncasecmp, strlcpy, strlcat, strndup,
246		strnlen, strsep],,,[
247#include <string.h>
248])
249AC_CHECK_DECLS([strsuftoll, mi_vector_hash],,,[#include <stdlib.h>])
250AC_CHECK_DECLS([lchflags, lchmod, lchown],,,[
251#include <sys/stat.h>
252#include <unistd.h>
253])
254
255AC_CHECK_DECLS([err, errc, errx, verrc, verrx, warn, warnc, warnx, vwarnc,
256		vwarnx],,,[
257#ifdef HAVE_ERR_H
258#include <err.h>
259#endif
260])
261
262AC_CHECK_DECLS([htobe16, htobe32, htobe64, htole16, htole32, htole64,
263		be16toh, be32toh, be64toh, le16toh, le32toh, le64toh],,,
264		[#include <sys/types.h>])
265
266AC_CHECK_DECLS([bswap16, bswap32, bswap64],,, [#include <machine/bswap.h>])
267
268AC_CHECK_DECLS([be16enc, le16enc, be16dec, le16dec, be32enc, le32enc,
269		be32dec, le32dec, be64enc, le64enc, be64dec, le64dec],,,
270		[#include <sys/endian.h>])
271
272AC_CHECK_DECLS([fstatvfs],,, [#include <sys/statvfs.h>])
273
274AC_CHECK_DECLS([setgroupent, setpassent],,, [
275#include <sys/types.h>
276#include <grp.h>
277#include <pwd.h>
278])
279
280# regcomp() and regexec() are also names of functions in the old V8
281# regexp package.  To avoid them, we need to find out who has regfree().
282
283dnl # Cygwin: We *MUST* look at -lregex *before* the "no libs" condition.
284dnl # Thus AC_CHECK_LIB(regex...) comes first, and AC_SEARCHLIBS next.
285AC_CHECK_LIB(regex, regfree)
286AC_SEARCH_LIBS(regfree, rx posix)
287
288AC_CHECK_LIB(rt, clock_gettime)
289
290AC_CHECK_FUNCS(fparseln, [
291    AC_MSG_CHECKING(if fparseln seems to work)
292    AC_RUN_IFELSE(
293        [AC_LANG_SOURCE([[
294#define _NETBSD_SOURCE
295#include <stdio.h>
296#include <stdlib.h>
297#define CONFTEST	"conftest.fparseln"
298#define COMMENT		'#'
299int
300main(void)
301{
302	static const char delim[3] = { '\0', '\0', COMMENT };
303	FILE *fp;
304	char *ptr;
305	fp = fopen(CONFTEST, "w+");
306	if (fp != NULL) {
307		unlink(CONFTEST);
308		ungetc(COMMENT, fp);
309		ptr = fparseln(fp, NULL, NULL, delim,
310		    FPARSELN_UNESCALL);
311		fclose(fp);
312		if (ptr == NULL)
313			exit(0);
314	}
315	exit(1);
316}
317        ]])],
318        [AC_MSG_RESULT(yes)],
319        [AC_MSG_RESULT(no)
320         AC_DEFINE(BROKEN_FPARSELN, 1,
321            [Define to 1 if your 'fparseln' function is broken.])],
322        [AC_MSG_WARN([cross compiling: not checking farseln])]
323    )
324])
325
326dnl
327dnl Set per-warning CC_* variables if supported by HOST_CC.
328dnl
329
330dnl Disable use of pre-compiled headers on Darwin.
331NB_CHECK_CC_FLAG([-no-cpp-precomp])
332
333dnl Detect HOST_CC support for <bsd.own.mk> CC_* warnings
334NB_CHECK_CC_FLAG([-Wno-address-of-packed-member])
335NB_CHECK_CC_FLAG([-Wno-cast-function-type])
336NB_CHECK_CC_FLAG([-Wno-error=address-of-packed-member])
337NB_CHECK_CC_FLAG([-Wno-format-overflow])
338NB_CHECK_CC_FLAG([-Wno-format-truncation])
339NB_CHECK_CC_FLAG([-Wno-implicit-fallthrough])
340NB_CHECK_CC_FLAG([-Wno-maybe-uninitialized])
341NB_CHECK_CC_FLAG([-Wno-return-local-addr])
342NB_CHECK_CC_FLAG([-Wno-stringop-overflow])
343NB_CHECK_CC_FLAG([-Wno-stringop-truncation])
344
345AC_OUTPUT()
346
347dnl Display results
348dnl
349AC_MSG_NOTICE([========= configure results for compat ==========])
350m4_foreach_w([NB_VAR], [CC LIBS ]NB_CHECK_CC_FLAG_VARS, [dnl
351AC_MSG_NOTICE(m4_format([%-40s],NB_VAR)[$NB_VAR])
352])
353AC_MSG_NOTICE([================================================])
354