1 dnl Copyright (c) 1995, 1996, 1997, 1998
2 dnl The Regents of the University of California. All rights reserved.
4 dnl Redistribution and use in source and binary forms, with or without
5 dnl modification, are permitted provided that: (1) source code distributions
6 dnl retain the above copyright notice and this paragraph in its entirety, (2)
7 dnl distributions including binary code include the above copyright notice and
8 dnl this paragraph in its entirety in the documentation or other materials
9 dnl provided with the distribution, and (3) all advertising materials mentioning
10 dnl features or use of this software display the following acknowledgement:
11 dnl ``This product includes software developed by the University of California,
12 dnl Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
13 dnl the University nor the names of its contributors may be used to endorse
14 dnl or promote products derived from this software without specific prior
15 dnl written permission.
16 dnl THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
17 dnl WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
18 dnl MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 dnl LBL autoconf macros
24 dnl Do whatever AC_LBL_C_INIT work is necessary before using AC_PROG_CC.
26 dnl It appears that newer versions of autoconf (2.64 and later) will,
27 dnl if you use AC_TRY_COMPILE in a macro, stick AC_PROG_CC at the
28 dnl beginning of the macro, even if the macro itself calls AC_PROG_CC.
29 dnl See the "Prerequisite Macros" and "Expanded Before Required" sections
30 dnl in the Autoconf documentation.
32 dnl This causes a steaming heap of fail in our case, as we were, in
33 dnl AC_LBL_C_INIT, doing the tests we now do in AC_LBL_C_INIT_BEFORE_CC,
34 dnl calling AC_PROG_CC, and then doing the tests we now do in
35 dnl AC_LBL_C_INIT. Now, we run AC_LBL_C_INIT_BEFORE_CC, AC_PROG_CC,
36 dnl and AC_LBL_C_INIT at the top level.
38 AC_DEFUN(AC_LBL_C_INIT_BEFORE_CC,
40 AC_BEFORE([$0], [AC_LBL_C_INIT])
41 AC_BEFORE([$0], [AC_PROG_CC])
42 AC_BEFORE([$0], [AC_LBL_FIXINCLUDES])
43 AC_BEFORE([$0], [AC_LBL_DEVEL])
44 AC_ARG_WITH(gcc, [ --without-gcc don't use gcc])
46 if test "${srcdir}" != "." ; then
49 if test "${CFLAGS+set}" = set; then
52 if test -z "$CC" ; then
56 AC_CHECK_PROG(SHLICC2, shlicc2, yes, no)
57 if test $SHLICC2 = yes ; then
64 if test -z "$CC" -a "$with_gcc" = no ; then
71 dnl Determine which compiler we're using (cc or gcc)
72 dnl If using gcc, determine the version number
74 dnl require that it support ansi prototypes
75 dnl use -O (AC_PROG_CC will use -g -O2 on gcc, so we don't need to
76 dnl do that ourselves for gcc)
77 dnl add -g flags, as appropriate
78 dnl explicitly specify /usr/local/include
80 dnl NOTE WELL: with newer versions of autoconf, "gcc" means any compiler
81 dnl that defines __GNUC__, which means clang, for example, counts as "gcc".
85 dnl AC_LBL_C_INIT(copt, incls)
95 AC_DEFUN(AC_LBL_C_INIT,
97 AC_BEFORE([$0], [AC_LBL_FIXINCLUDES])
98 AC_BEFORE([$0], [AC_LBL_DEVEL])
99 AC_BEFORE([$0], [AC_LBL_SHLIBS_INIT])
100 if test "$GCC" = yes ; then
102 # -Werror forces warnings to be errors.
104 ac_lbl_cc_force_warning_errors=-Werror
107 # Try to have the compiler default to hiding symbols,
108 # so that only symbols explicitly exported with
109 # PCAP_API will be visible outside (shared) libraries.
111 AC_LBL_CHECK_COMPILER_OPT($1, -fvisibility=hidden)
113 $2="$$2 -I/usr/local/include"
114 LDFLAGS="$LDFLAGS -L/usr/local/lib"
120 # This is assumed either to be GCC or clang, both
121 # of which use -Werror to force warnings to be errors.
123 ac_lbl_cc_force_warning_errors=-Werror
126 # Try to have the compiler default to hiding symbols,
127 # so that only symbols explicitly exported with
128 # PCAP_API will be visible outside (shared) libraries.
130 AC_LBL_CHECK_COMPILER_OPT($1, -fvisibility=hidden)
135 # HP C, which is what we presume we're using, doesn't
136 # exit with a non-zero exit status if we hand it an
137 # invalid -W flag, can't be forced to do so even with
138 # +We, and doesn't handle GCC-style -W flags, so we
139 # don't want to try using GCC-style -W flags.
141 ac_lbl_cc_dont_try_gcc_dashW=yes
146 # MIPS C, which is what we presume we're using, doesn't
147 # necessarily exit with a non-zero exit status if we
148 # hand it an invalid -W flag, can't be forced to do
149 # so, and doesn't handle GCC-style -W flags, so we
150 # don't want to try using GCC-style -W flags.
152 ac_lbl_cc_dont_try_gcc_dashW=yes
154 # It also, apparently, defaults to "char" being
155 # unsigned, unlike most other C implementations;
156 # I suppose we could say "signed char" whenever
157 # we want to guarantee a signed "char", but let's
158 # just force signed chars.
160 # -xansi is normally the default, but the
161 # configure script was setting it; perhaps -cckr
162 # was the default in the Old Days. (Then again,
163 # that would probably be for backwards compatibility
164 # in the days when ANSI C was Shiny and New, i.e.
165 # 1989 and the early '90's, so maybe we can just
166 # drop support for those compilers.)
168 # -g is equivalent to -g2, which turns off
169 # optimization; we choose -g3, which generates
170 # debugging information but doesn't turn off
171 # optimization (even if the optimization would
172 # cause inaccuracies in debugging).
174 $1="$$1 -xansi -signed -g3"
179 # Presumed to be DEC OSF/1, Digital UNIX, or
182 # The DEC C compiler, which is what we presume we're
183 # using, doesn't exit with a non-zero exit status if we
184 # hand it an invalid -W flag, can't be forced to do
185 # so, and doesn't handle GCC-style -W flags, so we
186 # don't want to try using GCC-style -W flags.
188 ac_lbl_cc_dont_try_gcc_dashW=yes
190 # -g is equivalent to -g2, which turns off
191 # optimization; we choose -g3, which generates
192 # debugging information but doesn't turn off
193 # optimization (even if the optimization would
194 # cause inaccuracies in debugging).
201 # Assumed to be Sun C, which requires -errwarn to force
202 # warnings to be treated as errors.
204 ac_lbl_cc_force_warning_errors=-errwarn
207 # Try to have the compiler default to hiding symbols,
208 # so that only symbols explicitly exported with
209 # PCAP_API will be visible outside (shared) libraries.
211 AC_LBL_CHECK_COMPILER_OPT($1, -xldscope=hidden)
215 AC_MSG_CHECKING(that Ultrix $CC hacks const in prototypes)
216 AC_CACHE_VAL(ac_cv_lbl_cc_const_proto,
218 [#include <sys/types.h>],
219 [struct a { int b; };
220 void c(const struct a *)],
221 ac_cv_lbl_cc_const_proto=yes,
222 ac_cv_lbl_cc_const_proto=no))
223 AC_MSG_RESULT($ac_cv_lbl_cc_const_proto)
224 if test $ac_cv_lbl_cc_const_proto = no ; then
226 [to handle Ultrix compilers that don't support const in prototypes])
235 dnl Check whether, if you pass an unknown warning option to the
236 dnl compiler, it fails or just prints a warning message and succeeds.
237 dnl Set ac_lbl_unknown_warning_option_error to the appropriate flag
238 dnl to force an error if it would otherwise just print a warning message
241 AC_DEFUN(AC_LBL_CHECK_UNKNOWN_WARNING_OPTION_ERROR,
243 AC_MSG_CHECKING([whether the compiler fails when given an unknown warning option])
244 save_CFLAGS="$CFLAGS"
245 CFLAGS="$CFLAGS -Wxyzzy-this-will-never-succeed-xyzzy"
252 # We're assuming this is clang, where
253 # -Werror=unknown-warning-option is the appropriate
254 # option to force the compiler to fail.
256 ac_lbl_unknown_warning_option_error="-Werror=unknown-warning-option"
261 CFLAGS="$save_CFLAGS"
265 dnl Check whether the compiler option specified as the second argument
266 dnl is supported by the compiler and, if so, add it to the macro
267 dnl specified as the first argument
269 AC_DEFUN(AC_LBL_CHECK_COMPILER_OPT,
271 AC_MSG_CHECKING([whether the compiler supports the $2 option])
272 save_CFLAGS="$CFLAGS"
273 if expr "x$2" : "x-W.*" >/dev/null
275 CFLAGS="$CFLAGS $ac_lbl_unknown_warning_option_error $2"
276 elif expr "x$2" : "x-f.*" >/dev/null
278 CFLAGS="$CFLAGS -Werror $2"
279 elif expr "x$2" : "x-m.*" >/dev/null
281 CFLAGS="$CFLAGS -Werror $2"
290 CFLAGS="$save_CFLAGS"
295 CFLAGS="$save_CFLAGS"
300 dnl Check whether the compiler supports an option to generate
301 dnl Makefile-style dependency lines
303 dnl GCC uses -M for this. Non-GCC compilers that support this
304 dnl use a variety of flags, including but not limited to -M.
306 dnl We test whether the flag in question is supported, as older
307 dnl versions of compilers might not support it.
309 dnl We don't try all the possible flags, just in case some flag means
310 dnl "generate dependencies" on one compiler but means something else
311 dnl on another compiler.
313 dnl Most compilers that support this send the output to the standard
314 dnl output by default. IBM's XLC, however, supports -M but sends
315 dnl the output to {sourcefile-basename}.u, and AIX has no /dev/stdout
316 dnl to work around that, so we don't bother with XLC.
318 AC_DEFUN(AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT,
320 AC_MSG_CHECKING([whether the compiler supports generating dependencies])
321 if test "$GCC" = yes ; then
323 # GCC, or a compiler deemed to be GCC by AC_PROG_CC (even
324 # though it's not); we assume that, in this case, the flag
327 ac_lbl_dependency_flag="-M"
330 # Not GCC or a compiler deemed to be GCC; what platform is
331 # this? (We're assuming that if the compiler isn't GCC
332 # it's the compiler from the vendor of the OS; that won't
333 # necessarily be true for x86 platforms, where it might be
334 # the Intel C compiler.)
340 # MIPS C for IRIX, DEC C, and clang all use -M.
342 ac_lbl_dependency_flag="-M"
349 ac_lbl_dependency_flag="-xM"
354 # HP's older C compilers don't support this.
355 # HP's newer C compilers support this with
356 # either +M or +Make; the older compilers
357 # interpret +M as something completely
358 # different, so we use +Make so we don't
359 # think it works with the older compilers.
361 ac_lbl_dependency_flag="+Make"
366 # Not one of the above; assume no support for
367 # generating dependencies.
369 ac_lbl_dependency_flag=""
375 # Is ac_lbl_dependency_flag defined and, if so, does the compiler
378 # Note: clang doesn't seem to exit with an error status when handed
379 # an unknown non-warning error, even if you pass it
380 # -Werror=unknown-warning-option. However, it always supports
381 # -M, so the fact that this test always succeeds with clang
384 if test ! -z "$ac_lbl_dependency_flag"; then
386 [AC_LANG_SOURCE([[int main(void) { return 0; }]])])
387 if AC_RUN_LOG([eval "$CC $ac_lbl_dependency_flag conftest.c >/dev/null 2>&1"]); then
388 AC_MSG_RESULT([yes, with $ac_lbl_dependency_flag])
389 DEPENDENCY_CFLAG="$ac_lbl_dependency_flag"
390 MKDEP='${srcdir}/mkdep'
394 # We can't run mkdep, so have "make depend" do
397 MKDEP='${srcdir}/nomkdep'
403 # We can't run mkdep, so have "make depend" do
406 MKDEP='${srcdir}/nomkdep'
408 AC_SUBST(DEPENDENCY_CFLAG)
413 dnl Determine what options are needed to build a shared library
417 dnl AC_LBL_SHLIBS_INIT
421 dnl V_SHLIB_CCOPT (modified to build position-independent code)
427 AC_DEFUN(AC_LBL_SHLIBS_INIT,
429 if test "$GCC" = yes ; then
431 # On platforms where we build a shared library:
433 # add options to generate position-independent code,
434 # if necessary (it's the default in AIX and Darwin/macOS);
436 # define option to set the soname of the shared library,
437 # if the OS supports that;
439 # add options to specify, at link time, a directory to
440 # add to the run-time search path, if that's necessary.
443 V_SHLIB_OPT="-shared"
449 freebsd*|netbsd*|openbsd*|dragonfly*|linux*|osf*)
451 # Platforms where the linker is the GNU linker
452 # or accepts command-line arguments like
453 # those the GNU linker accepts.
455 # Some instruction sets require -fPIC on some
456 # operating systems. Check for them. If you
457 # have a combination that requires it, add it
472 V_SHLIB_CCOPT="$V_SHLIB_CCOPT $PIC_OPT"
473 V_SONAME_OPT="-Wl,-soname,"
474 V_RPATH_OPT="-Wl,-rpath,"
478 V_SHLIB_CCOPT="$V_SHLIB_CCOPT -fpic"
480 # XXX - this assumes GCC is using the HP linker,
481 # rather than the GNU linker, and that the "+h"
482 # option is used on all HP-UX platforms, both .sl
485 V_SONAME_OPT="-Wl,+h,"
487 # By default, directories specifed with -L
488 # are added to the run-time search path, so
489 # we don't add them in pcap-config.
494 V_SHLIB_CCOPT="$V_SHLIB_CCOPT -fpic"
496 # XXX - this assumes GCC is using the Sun linker,
497 # rather than the GNU linker.
499 V_SONAME_OPT="-Wl,-h,"
500 V_RPATH_OPT="-Wl,-R,"
505 # Set the appropriate compiler flags and, on platforms
506 # where we build a shared library:
508 # add options to generate position-independent code,
509 # if necessary (it's the default in Darwin/macOS);
511 # if we generate ".so" shared libraries, define the
512 # appropriate options for building the shared library;
514 # add options to specify, at link time, a directory to
515 # add to the run-time search path, if that's necessary.
517 # Note: spaces after V_SONAME_OPT are significant; on
518 # some platforms the soname is passed with a GCC-like
519 # "-Wl,-soname,{soname}" option, with the soname part
520 # of the option, while on other platforms the C compiler
521 # driver takes it as a regular option with the soname
522 # following the option. The same applies to V_RPATH_OPT.
528 V_SHLIB_OPT="-G -bnoentry -bexpall"
531 freebsd*|netbsd*|openbsd*|dragonfly*|linux*)
535 V_SHLIB_CCOPT="$V_SHLIB_CCOPT -fpic"
537 V_SHLIB_OPT="-shared"
538 V_SONAME_OPT="-Wl,-soname,"
539 V_RPATH_OPT="-Wl,-rpath,"
543 V_SHLIB_CCOPT="$V_SHLIB_CCOPT +z"
548 # By default, directories specifed with -L
549 # are added to the run-time search path, so
550 # we don't add them in pcap-config.
556 # Presumed to be DEC OSF/1, Digital UNIX, or
560 V_SHLIB_OPT="-shared"
561 V_SONAME_OPT="-soname "
562 V_RPATH_OPT="-rpath "
566 V_SHLIB_CCOPT="$V_SHLIB_CCOPT -Kpic"
577 # Try compiling a sample of the type of code that appears in
578 # gencode.c with "inline", "__inline__", and "__inline".
580 # Autoconf's AC_C_INLINE, at least in autoconf 2.13, isn't good enough,
581 # as it just tests whether a function returning "int" can be inlined;
582 # at least some versions of HP's C compiler can inline that, but can't
583 # inline a function that returns a struct pointer.
585 # Make sure we use the V_CCOPT flags, because some of those might
588 AC_DEFUN(AC_LBL_C_INLINE,
589 [AC_MSG_CHECKING(for inline)
590 save_CFLAGS="$CFLAGS"
592 AC_CACHE_VAL(ac_cv_lbl_inline, [
595 for ac_lbl_inline in inline __inline__ __inline
598 [#define inline $ac_lbl_inline
599 static inline struct iltest *foo(void);
605 static inline struct iltest *
608 static struct iltest xxx;
611 }],,ac_lbl_cc_inline=yes,)
612 if test "$ac_lbl_cc_inline" = yes ; then
616 if test "$ac_lbl_cc_inline" = yes ; then
617 ac_cv_lbl_inline=$ac_lbl_inline
619 CFLAGS="$save_CFLAGS"
620 if test ! -z "$ac_cv_lbl_inline" ; then
621 AC_MSG_RESULT($ac_cv_lbl_inline)
625 AC_DEFINE_UNQUOTED(inline, $ac_cv_lbl_inline, [Define as token for inline if inlining supported])])
628 dnl If using gcc, make sure we have ANSI ioctl definitions
632 dnl AC_LBL_FIXINCLUDES
634 AC_DEFUN(AC_LBL_FIXINCLUDES,
635 [if test "$GCC" = yes ; then
636 AC_MSG_CHECKING(for ANSI ioctl definitions)
637 AC_CACHE_VAL(ac_cv_lbl_gcc_fixincludes,
640 * This generates a "duplicate case value" when fixincludes
643 # include <sys/types.h>
644 # include <sys/time.h>
645 # include <sys/ioctl.h>
646 # ifdef HAVE_SYS_IOCCOM_H
647 # include <sys/ioccom.h>
653 ac_cv_lbl_gcc_fixincludes=yes,
654 ac_cv_lbl_gcc_fixincludes=no))
655 AC_MSG_RESULT($ac_cv_lbl_gcc_fixincludes)
656 if test $ac_cv_lbl_gcc_fixincludes = no ; then
657 # Don't cache failure
658 unset ac_cv_lbl_gcc_fixincludes
659 AC_MSG_ERROR(see the INSTALL for more info)
664 dnl Checks to see if union wait is used with WEXITSTATUS()
668 dnl AC_LBL_UNION_WAIT
672 dnl DECLWAITSTATUS (defined)
674 AC_DEFUN(AC_LBL_UNION_WAIT,
675 [AC_MSG_CHECKING(if union wait is used)
676 AC_CACHE_VAL(ac_cv_lbl_union_wait,
678 # include <sys/types.h>
679 # include <sys/wait.h>],
681 u_int i = WEXITSTATUS(status);
682 u_int j = waitpid(0, &status, 0);],
683 ac_cv_lbl_union_wait=no,
684 ac_cv_lbl_union_wait=yes))
685 AC_MSG_RESULT($ac_cv_lbl_union_wait)
686 if test $ac_cv_lbl_union_wait = yes ; then
687 AC_DEFINE(DECLWAITSTATUS,union wait,[type for wait])
689 AC_DEFINE(DECLWAITSTATUS,int,[type for wait])
693 dnl Checks to see if -R is used
697 dnl AC_LBL_HAVE_RUN_PATH
701 dnl ac_cv_lbl_have_run_path (yes or no)
703 AC_DEFUN(AC_LBL_HAVE_RUN_PATH,
704 [AC_MSG_CHECKING(for ${CC-cc} -R)
705 AC_CACHE_VAL(ac_cv_lbl_have_run_path,
706 [echo 'main(){}' > conftest.c
707 ${CC-cc} -o conftest conftest.c -R/a1/b2/c3 >conftest.out 2>&1
708 if test ! -s conftest.out ; then
709 ac_cv_lbl_have_run_path=yes
711 ac_cv_lbl_have_run_path=no
714 AC_MSG_RESULT($ac_cv_lbl_have_run_path)
718 dnl Checks to see if unaligned memory accesses fail
722 dnl AC_LBL_UNALIGNED_ACCESS
726 dnl LBL_ALIGN (DEFINED)
728 AC_DEFUN(AC_LBL_UNALIGNED_ACCESS,
729 [AC_MSG_CHECKING(if unaligned accesses fail)
730 AC_CACHE_VAL(ac_cv_lbl_unaligned_fail,
734 # These are CPU types where:
736 # the CPU faults on an unaligned access, but at least some
737 # OSes that support that CPU catch the fault and simulate
738 # the unaligned access (e.g., Alpha/{Digital,Tru64} UNIX) -
739 # the simulation is slow, so we don't want to use it;
741 # the CPU, I infer (from the old
743 # XXX: should also check that they don't do weird things (like on arm)
745 # comment) doesn't fault on unaligned accesses, but doesn't
746 # do a normal unaligned fetch, either (e.g., presumably, ARM);
748 # for whatever reason, the test program doesn't work
749 # (this has been claimed to be the case for several of those
750 # CPUs - I don't know what the problem is; the problem
751 # was reported as "the test program dumps core" for SuperH,
752 # but that's what the test program is *supposed* to do -
753 # it dumps core before it writes anything, so the test
754 # for an empty output file should find an empty output
755 # file and conclude that unaligned accesses don't work).
757 # This run-time test won't work if you're cross-compiling, so
758 # in order to support cross-compiling for a particular CPU,
759 # we have to wire in the list of CPU types anyway, as far as
760 # I know, so perhaps we should just have a set of CPUs on
761 # which we know it doesn't work, a set of CPUs on which we
762 # know it does work, and have the script just fail on other
763 # cpu types and update it when such a failure occurs.
765 alpha*|arm*|bfin*|hp*|mips*|sh*|sparc*|ia64|nv1)
766 ac_cv_lbl_unaligned_fail=yes
770 cat >conftest.c <<EOF
771 # include <sys/types.h>
772 # include <sys/wait.h>
774 unsigned char a[[5]] = { 1, 2, 3, 4, 5 };
779 /* avoid "core dumped" message */
785 pid = waitpid(pid, &status, 0);
788 exit(!WIFEXITED(status));
791 i = *(unsigned int *)&a[[1]];
796 ${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS \
797 conftest.c $LIBS >/dev/null 2>&1
798 if test ! -x conftest ; then
799 dnl failed to compile for some reason
800 ac_cv_lbl_unaligned_fail=yes
802 ./conftest >conftest.out
803 if test ! -s conftest.out ; then
804 ac_cv_lbl_unaligned_fail=yes
806 ac_cv_lbl_unaligned_fail=no
809 rm -f -r conftest* core core.conftest
812 AC_MSG_RESULT($ac_cv_lbl_unaligned_fail)
813 if test $ac_cv_lbl_unaligned_fail = yes ; then
814 AC_DEFINE(LBL_ALIGN,1,[if unaligned access fails])
818 dnl If the file .devel exists:
819 dnl Add some warning flags if the compiler supports them
820 dnl If an os prototype include exists, symlink os-proto.h to it
824 dnl AC_LBL_DEVEL(copt)
828 dnl $1 (copt appended)
829 dnl HAVE_OS_PROTO_H (defined)
830 dnl os-proto.h (symlinked)
832 AC_DEFUN(AC_LBL_DEVEL,
834 if test "${LBL_CFLAGS+set}" = set; then
835 $1="$$1 ${LBL_CFLAGS}"
837 if test -f .devel ; then
839 # Skip all the warning option stuff on some compilers.
841 if test "$ac_lbl_cc_dont_try_gcc_dashW" != yes; then
842 AC_LBL_CHECK_UNKNOWN_WARNING_OPTION_ERROR()
843 AC_LBL_CHECK_COMPILER_OPT($1, -Wall)
844 AC_LBL_CHECK_COMPILER_OPT($1, -Wsign-compare)
845 AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-prototypes)
846 AC_LBL_CHECK_COMPILER_OPT($1, -Wstrict-prototypes)
847 AC_LBL_CHECK_COMPILER_OPT($1, -Wshadow)
848 AC_LBL_CHECK_COMPILER_OPT($1, -Wdeclaration-after-statement)
849 AC_LBL_CHECK_COMPILER_OPT($1, -Wused-but-marked-unused)
850 AC_LBL_CHECK_COMPILER_OPT($1, -Wdocumentation)
851 AC_LBL_CHECK_COMPILER_OPT($1, -Wcomma)
852 AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-noreturn)
853 # Warns about safeguards added in case the enums are
855 # AC_LBL_CHECK_COMPILER_OPT($1, -Wcovered-switch-default)
856 AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-variable-declarations)
857 AC_LBL_CHECK_COMPILER_OPT($1, -Wunused-parameter)
858 AC_LBL_CHECK_COMPILER_OPT($1, -Wformat-nonliteral)
859 AC_LBL_CHECK_COMPILER_OPT($1, -Wunreachable-code)
861 AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT()
863 # We used to set -n32 for IRIX 6 when not using GCC (presumed
864 # to mean that we're using MIPS C or MIPSpro C); it specified
865 # the "new" faster 32-bit ABI, introduced in IRIX 6.2. I'm
866 # not sure why that would be something to do *only* with a
867 # .devel file; why should the ABI for which we produce code
870 os=`echo $host_os | sed -e 's/\([[0-9]][[0-9]]*\)[[^0-9]].*$/\1/'`
872 if test -f $name ; then
873 ln -s $name os-proto.h
874 AC_DEFINE(HAVE_OS_PROTO_H, 1,
875 [if there's an os_proto.h for this platform, to use additional prototypes])
877 AC_MSG_WARN(can't find $name)
882 dnl Improved version of AC_CHECK_LIB
884 dnl Thanks to John Hawkinson (jhawk@mit.edu)
888 dnl AC_LBL_CHECK_LIB(LIBRARY, FUNCTION [, ACTION-IF-FOUND [,
889 dnl ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]])
895 dnl XXX - "AC_LBL_LIBRARY_NET" was redone to use "AC_SEARCH_LIBS"
896 dnl rather than "AC_LBL_CHECK_LIB", so this isn't used any more.
897 dnl We keep it around for reference purposes in case it's ever
898 dnl useful in the future.
901 define(AC_LBL_CHECK_LIB,
902 [AC_MSG_CHECKING([for $2 in -l$1])
903 dnl Use a cache variable name containing the library, function
904 dnl name, and extra libraries to link with, because the test really is
905 dnl for library $1 defining function $2, when linked with potinal
906 dnl library $5, not just for library $1. Separate tests with the same
907 dnl $1 and different $2's or $5's may have different results.
908 ac_lib_var=`echo $1['_']$2['_']$5 | sed 'y%./+- %__p__%'`
909 AC_CACHE_VAL(ac_cv_lbl_lib_$ac_lib_var,
910 [ac_save_LIBS="$LIBS"
913 ifelse([$2], [main], , dnl Avoid conflicting decl of main.
914 [/* Override any gcc2 internal prototype to avoid an error. */
915 ]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
919 [/* We use char because int might match the return type of a gcc2
920 builtin and then its argument prototype would still apply. */
924 eval "ac_cv_lbl_lib_$ac_lib_var=yes",
925 eval "ac_cv_lbl_lib_$ac_lib_var=no")
928 if eval "test \"`echo '$ac_cv_lbl_lib_'$ac_lib_var`\" = yes"; then
932 ac_tr_lib=HAVE_LIB`echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g' \
933 -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
935 AC_DEFINE_UNQUOTED($ac_tr_lib)
946 dnl AC_LBL_LIBRARY_NET
948 dnl This test is for network applications that need socket functions and
949 dnl getaddrinfo()/getnameinfo()-ish functions. We now require
950 dnl getaddrinfo() and getnameinfo(). We also prefer versions of
951 dnl recvmsg() that conform to the Single UNIX Specification, so that we
952 dnl can check whether a datagram received with recvmsg() was truncated
953 dnl when received due to the buffer being too small.
955 dnl On most operating systems, they're available in the system library.
957 dnl Under Solaris, we need to link with libsocket and libnsl to get
958 dnl getaddrinfo() and getnameinfo() and, if we have libxnet, we need to
959 dnl link with libxnet before libsocket to get a version of recvmsg()
960 dnl that conforms to the Single UNIX Specification.
962 dnl We use getaddrinfo() because we want a portable thread-safe way
963 dnl of getting information for a host name or port; there exist _r
964 dnl versions of gethostbyname() and getservbyname() on some platforms,
965 dnl but not on all platforms.
967 AC_DEFUN(AC_LBL_LIBRARY_NET, [
969 # Most operating systems have getaddrinfo() in the default searched
970 # libraries (i.e. libc). Check there first.
972 AC_CHECK_FUNC(getaddrinfo,,
975 # Not found in the standard system libraries.
976 # Try libsocket, which requires libnsl.
978 AC_CHECK_LIB(socket, getaddrinfo,
981 # OK, we found it in libsocket.
983 LIBS="-lsocket -lnsl $LIBS"
989 AC_MSG_ERROR([getaddrinfo is required, but wasn't found])
993 # OK, do we have recvmsg() in libxnet?
994 # We also link with libsocket and libnsl.
996 AC_CHECK_LIB(xnet, recvmsg,
999 # Yes - link with it as well.
1002 ], , -lsocket -lnsl)
1004 # DLPI needs putmsg under HPUX so test for -lstr while we're at it
1005 AC_SEARCH_LIBS(putmsg, str)