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Implement --with-libevent-dir. Improve libevent search techniques. May be buggy as my old apartment.
svn:r5870
This commit is contained in:
Nick Mathewson
parent
35f91db15f
commit
b28dbb5b99
172
configure.in
172
configure.in
@ -56,6 +56,7 @@ AC_PROG_RANLIB
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# The big search for OpenSSL
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# copied from openssh's configure.ac
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tryssldir=""
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AC_ARG_WITH(ssl-dir,
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[ --with-ssl-dir=PATH Specify path to OpenSSL installation ],
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[
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@ -65,6 +66,16 @@ AC_ARG_WITH(ssl-dir,
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]
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)
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trylibeventdir=""
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AC_ARG_WITH(libevent-dir,
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[ --with-libevent-dir=PATH Specify path to Libevent installation ],
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[
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if test "x$withval" != "xno" ; then
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trylibeventdir=$withval
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fi
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]
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)
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TORUSER=_tor
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AC_ARG_WITH(tor-user,
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[ --with-tor-user=NAME Specify username for tor daemon ],
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@ -95,115 +106,84 @@ fi
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dnl ------------------------------------------------------
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dnl Where do you live, libevent? And how do we call you?
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# Step 1. Try to link and run a program using libevent. If it works,
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# great! Just add -levent.
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AC_CACHE_CHECK([for a normal libevent], ac_cv_libevent_normal, [
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saved_LIBS="$LIBS"
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LIBS="$LIBS -levent"
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AC_TRY_RUN([
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void *event_init(void);
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int main(void)
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{
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event_init();
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return 0;
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}], ac_cv_libevent_normal=yes, ac_cv_libevent_normal=no)
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LIBS="$saved_LIBS"
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])
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if test "$ac_cv_libevent_normal" = yes; then
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LIBS="$LIBS -levent"
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else
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AC_CACHE_CHECK([for libevent in /usr/local/lib], ac_cv_libevent_local, [
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saved_LIBS="$LIBS"
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saved_LDFLAGS="$LDFLAGS"
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LIBS="$LIBS -levent"
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LDFLAGS="$LDFLAGS -L/usr/local/lib"
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# Step 2. Otherwise, check whether adding -L/usr/local/lib allows
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# us to link. If not, assume we have no libevent at all.
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if test "x$prefix" != "xNONE" ; then
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trylibeventdir="$trylibeventdir $prefix"
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fi
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AC_CACHE_CHECK([for libevent location], ac_cv_libevent_dir, [
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for ledir in $trylibeventdir "" /usr/local ; do
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LDFLAGS="$saved_LDFLAGS"
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LIBS="$saved_LIBS -levent"
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# Skip the directory if it isn't there.
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if test ! -z "$ledir" -a ! -d "$ledir" ; then
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continue;
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fi
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if test ! -z "$ledir" ; then
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if test -d "$ledir/lib" ; then
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LDFLAGS="-L$ledir/lib $LDFLAGS"
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else
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LDFLAGS="-L$ledir $LDFLAGS"
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fi
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fi
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# Can I link it?
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AC_TRY_LINK([], [ void *event_init(void); event_init(); ],
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[ libevent_is_in_local=yes ], [ libevent_is_in_local=no ])
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if test $libevent_is_in_local = no ; then
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ac_cv_libevent_local=no
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[ libevent_linked=yes ], [ libevent_linked=no ])
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if test $libevent_linked = yes; then
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if test ! -z "$ledir" ; then
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ac_cv_libevent_dir=$ledir
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else
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# Step 3. Does adding -L/usr/local/lib allow us to run, too?
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# If so, all we have to do as adjust LDFLAGS and CFLAGS.
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AC_TRY_RUN([
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void *event_init(void);
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int main(void)
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{
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event_init();
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return 0;
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}], [ ac_cv_libevent_local=yes ], [ ac_cv_libevent_local=unlinked ])
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ac_cv_libevent_dir="(system)"
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fi
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if test "$GCC" = yes -a $ac_cv_libevent_local = unlinked ; then
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# Step 4. Okay, so we can link but not run. This probably means
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# that the dynamic linker doesn't have /usr/local/lib in
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# its search path. If we're lucky enough to be running
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# GCC on an ELF system, we might have a workaround for that.
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# See whether -Wl,-R/usr/local/lib makes things better.
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LDFLAGS="$LDFLAGS -Wl,-R/usr/local/lib"
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AC_TRY_RUN([
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void *event_init(void);
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int main(void)
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{
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event_init();
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return 0;
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}], [ ac_cv_libevent_local=unlinked_gcc_elf ])
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break
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fi
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LIBS="$saved_LIBS"
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LDFLAGS="$saved_LDFLAGS" ])
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# Now we're done. ac_vc_libevent_local could be:
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# yes -- Add -L/usr/local/lib and we can link fine.
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# unlinked_gcc_elf -- We can link, but we need to use the GCC-ELF
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# workaround. Complain a little.
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# unlinked -- We can link, but we can't run. Complain a lot.
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# no -- we can't link at all. Give an error and die.
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if test $ac_cv_libevent_local != no; then
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done
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])
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LIBS="$LIBS -levent"
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LDFLAGS="$LDFLAGS -L/usr/local/lib"
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CPPFLAGS="$CPPFLAGS -I/usr/local/include"
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fi
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if test $ac_cv_libevent_local = unlinked_gcc_elf; then
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LDFLAGS="$LDFLAGS -Wl,-R/usr/local/lib"
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if test -f /etc/ld.so.conf ; then
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AC_MSG_NOTICE([
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Apparently, you don't have /usr/local/lib in your /etc/ld.so.conf.
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Tor is smart enought to deal this now, but other applications aren't.
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You might want to add it in.])
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fi
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fi
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if test $ac_cv_libevent_local = unlinked ; then
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if test -f /etc/ld.so.conf ; then
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AC_MSG_NOTICE([
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=================================================
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Your libevent library is installed in /usr/local/lib,
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but your dynamic linker isn't configured to look for
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it there.
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Maybe you need to add /usr/local/lib to /etc/ld.so.conf,
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and then run ldconfig -v ?
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=================================================])
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if test $ac_cv_libevent_dir != "(system)"; then
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if test -d "$ac_cv_libevent_dir/lib" ; then
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LDFLAGS="-L$ac_cv_libevent_dir/lib $LDFLAGS"
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le_libdir="$ac_cv_libevent_dir/lib"
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else
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AC_MSG_NOTICE([
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=================================================
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Your libevent library is installed in /usr/local/lib,
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but your dynamic linker isn't configured to look for
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it there.
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=================================================])
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LDFLAGS="-L$ac_cv_libevent_dir $LDFLAGS"
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le_libdir="$ac_cv_libevent_dir"
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fi
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if test -d "$ac_cv_libevent_dir/include" ; then
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CPPFLAGS="-I$ac_cv_libevent_dir/include $CPPFLAGS"
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else
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CPPFLAGS="-I$ac_cv_libevent_dir $CPPFLAGS"
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fi
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fi
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if test $ac_cv_libevent_local = no ; then
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AC_MSG_ERROR([
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Tor requires libevent to build. You can download the latest
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version of libevent from http://monkey.org/~provos/libevent/])
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AC_CACHE_CHECK([whether libevent is in LDPATH], ac_cv_libevent_in_ldpath, [
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saved_LDFLAGS="$LDFLAGS"
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AC_TRY_RUN([void *event_init(void);
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int main(int c, char **v) {
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event_init(); return 0;
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}],
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libevent_runs=yes, libevent_runs=no)
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if test $libevent_runs = yes; then
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ac_cv_libevent_in_ldpath=yes
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else
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LDFLAGS="$LDFLAGS -Wl,-R$le_libdir"
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AC_TRY_RUN([void *event_init(void);
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int main(int c, char **v) {
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event_init(); return 0;
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}],
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libevent_runs_with_r=yes, libevent_runs_with_r=no)
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if test $libevent_runs_with_r = yes; then
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ac_cv_libevent_in_ldpath=no
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else
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AC_MSG_ERROR([Found linkable libevent in $ac_cv_libevent_dir, but it doesn't run, even with -R. Maybe specify another using --with-libevent-dir?])
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fi
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fi
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LDFLAGS="$saved_LDFLAGS"
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])
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if test $ac_cv_libevent_in_ldpath = no ; then
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LDFLAGS="$LDFLAGS -Wl,-R$le_libdir"
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fi
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dnl ------------------------------------------------------
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