189 lines
5.8 KiB
Text
189 lines
5.8 KiB
Text
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dnl
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dnl Improved version of AC_CHECK_LIB
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dnl
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dnl Thanks to John Hawkinson (jhawk@mit.edu)
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dnl
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dnl usage:
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dnl
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dnl GB_AC_LBL_CHECK_LIB(LIBRARY, FUNCTION [, ACTION-IF-FOUND [,
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dnl ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]])
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dnl
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dnl results:
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dnl
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dnl LIBS
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dnl
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define(GB_AC_LBL_CHECK_LIB,
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[AC_MSG_CHECKING([for $2 in -l$1])
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dnl Use a cache variable name containing both the library and function name,
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dnl because the test really is for library $1 defining function $2, not
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dnl just for library $1. Separate tests with the same $1 and different $2's
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dnl may have different results.
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ac_lib_var=`echo $1['_']$2['_']$5 | sed 'y%./+- %__p__%'`
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AC_CACHE_VAL(ac_cv_lbl_lib_$ac_lib_var,
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[ac_save_LIBS="$LIBS"
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LIBS="-l$1 $5 $LIBS"
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AC_TRY_LINK(dnl
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ifelse([$2], [main], , dnl Avoid conflicting decl of main.
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[/* Override any gcc2 internal prototype to avoid an error. */
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]ifelse(_AC_LANG_CURRENT, CPLUSPLUS, [#ifdef __cplusplus
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extern "C"
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#endif
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])dnl
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[/* We use char because int might match the return type of a gcc2
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builtin and then its argument prototype would still apply. */
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char $2();
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]),
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[$2()],
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eval "ac_cv_lbl_lib_$ac_lib_var=yes",
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eval "ac_cv_lbl_lib_$ac_lib_var=no")
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LIBS="$ac_save_LIBS"
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])dnl
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if eval "test \"`echo '$ac_cv_lbl_lib_'$ac_lib_var`\" = yes"; then
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AC_MSG_RESULT(yes)
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ifelse([$3], ,
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[changequote(, )dnl
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ac_tr_lib=HAVE_LIB`echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g' \
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-e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
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changequote([, ])dnl
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AC_DEFINE_UNQUOTED($ac_tr_lib, [], [])
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LIBS="-l$1 $LIBS"
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], [$3])
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else
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AC_MSG_RESULT(no)
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ifelse([$4], , , [$4
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])dnl
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fi
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])
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dnl
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dnl GB_AC_LBL_LIBRARY_NET
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dnl
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dnl This test is for network applications that need socket() and
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dnl gethostbyname() -ish functions. Under Solaris, those applications
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dnl need to link with "-lsocket -lnsl". Under IRIX, they need to link
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dnl with "-lnsl" but should *not* link with "-lsocket" because
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dnl libsocket.a breaks a number of things (for instance:
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dnl gethostbyname() under IRIX 5.2, and snoop sockets under most
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dnl versions of IRIX).
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dnl
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dnl Unfortunately, many application developers are not aware of this,
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dnl and mistakenly write tests that cause -lsocket to be used under
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dnl IRIX. It is also easy to write tests that cause -lnsl to be used
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dnl under operating systems where neither are necessary (or useful),
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dnl such as SunOS 4.1.4, which uses -lnsl for TLI.
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dnl
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dnl This test exists so that every application developer does not test
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dnl this in a different, and subtly broken fashion.
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dnl It has been argued that this test should be broken up into two
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dnl seperate tests, one for the resolver libraries, and one for the
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dnl libraries necessary for using Sockets API. Unfortunately, the two
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dnl are carefully intertwined and allowing the autoconf user to use
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dnl them independantly potentially results in unfortunate ordering
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dnl dependancies -- as such, such component macros would have to
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dnl carefully use indirection and be aware if the other components were
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dnl executed. Since other autoconf macros do not go to this trouble,
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dnl and almost no applications use sockets without the resolver, this
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dnl complexity has not been implemented.
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dnl
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dnl The check for libresolv is in case you are attempting to link
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dnl statically and happen to have a libresolv.a lying around (and no
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dnl libnsl.a).
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dnl
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AC_DEFUN([GB_AC_LBL_LIBRARY_NET], [
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# Most operating systems have gethostbyname() in the default searched
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# libraries (i.e. libc):
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AC_CHECK_FUNC(gethostbyname, ,
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# Some OSes (eg. Solaris) place it in libnsl:
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GB_AC_LBL_CHECK_LIB(nsl, gethostbyname, ,
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# Some strange OSes (SINIX) have it in libsocket:
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GB_AC_LBL_CHECK_LIB(socket, gethostbyname, ,
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# Unfortunately libsocket sometimes depends on libnsl.
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# AC_CHECK_LIB's API is essentially broken so the
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# following ugliness is necessary:
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GB_AC_LBL_CHECK_LIB(socket, gethostbyname,
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LIBS="-lsocket -lnsl $LIBS",
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AC_CHECK_LIB(resolv, gethostbyname),
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-lnsl))))
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AC_CHECK_FUNC(socket, , AC_CHECK_LIB(socket, socket, ,
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GB_AC_LBL_CHECK_LIB(socket, socket, LIBS="-lsocket -lnsl $LIBS", ,
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-lnsl)))
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# DLPI needs putmsg under HPUX so test for -lstr while we're at it
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AC_CHECK_LIB(str, putmsg)
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])
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dnl
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dnl Checks to see if struct tm has the BSD tm_gmtoff member
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dnl
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dnl usage:
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dnl
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dnl GB_AC_ACME_TM_GMTOFF
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dnl
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dnl results:
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dnl
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dnl HAVE_TM_GMTOFF (defined)
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dnl
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AC_DEFUN([GB_AC_ACME_TM_GMTOFF],
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[AC_MSG_CHECKING(if struct tm has tm_gmtoff member)
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AC_CACHE_VAL(ac_cv_acme_tm_has_tm_gmtoff,
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AC_TRY_COMPILE([
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# include <sys/types.h>
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# include <time.h>],
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[u_int i = sizeof(((struct tm *)0)->tm_gmtoff)],
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ac_cv_acme_tm_has_tm_gmtoff=yes,
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ac_cv_acme_tm_has_tm_gmtoff=no))
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AC_MSG_RESULT($ac_cv_acme_tm_has_tm_gmtoff)
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if test $ac_cv_acme_tm_has_tm_gmtoff = yes ; then
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AC_DEFINE([HAVE_TM_GMTOFF], [], [if struct tm has the BSD tm_gmtoff member])
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fi])
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dnl
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dnl Checks to see if int64_t exists
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dnl
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dnl usage:
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dnl
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dnl GB_AC_ACME_INT64T
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dnl
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dnl results:
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dnl
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dnl HAVE_INT64T (defined)
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dnl
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AC_DEFUN([GB_AC_ACME_INT64T],
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[AC_MSG_CHECKING(if int64_t exists)
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AC_CACHE_VAL(ac_cv_acme_int64_t,
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AC_TRY_COMPILE([
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# include <sys/types.h>],
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[int64_t i64],
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ac_cv_acme_int64_t=yes,
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ac_cv_acme_int64_t=no))
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AC_MSG_RESULT($ac_cv_acme_int64_t)
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if test $ac_cv_acme_int64_t = yes ; then
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AC_DEFINE([HAVE_INT64T], [], [if int64_t exists])
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fi])
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dnl
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dnl Checks to see if socklen_t exists
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dnl
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dnl usage:
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dnl
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dnl GB_AC_ACME_SOCKLENT
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dnl
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dnl results:
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dnl
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dnl HAVE_SOCKLENT (defined)
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dnl
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AC_DEFUN([GB_AC_ACME_SOCKLENT],
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[AC_MSG_CHECKING(if socklen_t exists)
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AC_CACHE_VAL(ac_cv_acme_socklen_t,
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AC_TRY_COMPILE([
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# include <sys/types.h>
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# include <sys/socket.h>],
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[socklen_t slen],
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ac_cv_acme_socklen_t=yes,
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ac_cv_acme_socklen_t=no))
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AC_MSG_RESULT($ac_cv_acme_socklen_t)
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if test $ac_cv_acme_socklen_t = yes ; then
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AC_DEFINE([HAVE_SOCKLENT], [], [if socklen_t exists])
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fi])
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