Clean up configure-time library handling a bit.

This patch was inspired by emacs-24 2014-04-09T13:37:49Z!sdl.web@gmail.com, which fixed
a bug due to sloppy library handling in 'configure'.
* configure.ac (LIB_MATH, LIB_PTHREAD, LIBXMU):
Use AC_SEARCH_LIBS instead of AC_CHECK_LIB as per Autoconf manual.
(LIB_MATH, LIB_PTHREAD, HAVE_X11, IMAGEMAGICK_LIBS, GTK_LIBS)
(DBUS_LIBS, LIBXMU, XFT_LIBS, LIBXSM, LIBXML2_LIBS, LIBS_MAIL)
(with_kerberos):
Don't let the library choice infect $LIBS.
(dnet_ntoa, cma_open): Remove obsolete tests.
(emacs_pthread_function): Probe for pthread_kill, not pthread_self,
as that's a bit more selective on GNU/Linux.
(LIBXEXT): Remove.
(touchlock): Test for existence when $LIBS_MAIL is in use.
(AC_CHECK_FUNCS): Use only $LIB_MATH in addition to $LIBS
when testing for typical functions like accept4, lrand48.
(random, rint): Remove obsolete HP-UX 9 A.09.05 test.

1 files changed, 20 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index bd710bd283d..e9836af43e4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,23 @@
+2014-04-14  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Clean up configure-time library handling a bit.
+        This patch was inspired by emacs-24 bzr 116961, which fixed
+        a bug due to sloppy library handling in 'configure'.
+        * configure.ac (LIB_MATH, LIB_PTHREAD, LIBXMU):
+        Use AC_SEARCH_LIBS instead of AC_CHECK_LIB as per Autoconf manual.
+        (LIB_MATH, LIB_PTHREAD, HAVE_X11, IMAGEMAGICK_LIBS, GTK_LIBS)
+        (DBUS_LIBS, LIBXMU, XFT_LIBS, LIBXSM, LIBXML2_LIBS, LIBS_MAIL)
+        (with_kerberos):
+        Don't let the library choice infect $LIBS.
+        (dnet_ntoa, cma_open): Remove obsolete tests.
+        (emacs_pthread_function): Probe for pthread_kill, not pthread_self,
+        as that's a bit more selective on GNU/Linux.
+        (LIBXEXT): Remove.
+        (touchlock): Test for existence when $LIBS_MAIL is in use.
+        (AC_CHECK_FUNCS): Use only $LIB_MATH in addition to $LIBS
+        when testing for typical functions like accept4, lrand48.
+        (random, rint): Remove obsolete HP-UX 9 A.09.05 test.
+
 2014-04-11  Glenn Morris  <rgm@gnu.org>
 
         * make-dist: Do not distribute generated admin/grammars/Makefile.