-AM_CONDITIONAL(HAVE_THREADS, test "x$ac_cv_lib_pthread_pthread_exit" = "xyes" -a "x$ac_cv_header_pthread_h" = "xyes")
-
-AC_CHECK_LIB(socket, socket)
-
-dnl check for glut location
-AC_CHECK_HEADER(GL/glut.h)
-if test "x$ac_cv_header_GL_glut_h" = "xyes"; then
- AC_DEFINE([GLUT_H], "GL/glut.h", [Define as glut.h include location])
-else
- AC_CHECK_HEADER(GLUT/glut.h)
- if test "x$ac_cv_header_GLUT_glut_h" = "xyes"; then
- AC_DEFINE([GLUT_H], "GLUT/glut.h", [Define as glut.h include location])
+if test "x$ac_cv_lib_pthread_pthread_exit" != "xyes" -a "x$ac_cv_header_pthread_h" = "xyes"; then
+ dnl FreeBSD: System has pthread.h, but -lpthread library check
+ dnl fails. See if we need -pthread instead of -lpthread and look
+ dnl for the functions in libc_r.
+ save_CXXFLAGS="$CXXFLAGS"
+ save_CFLAGS="$CFLAGS"
+ CXXFLAGS="-pthread $CXXFLAGS"
+ CFLAGS="-pthread $FLAGS"
+ save_LIBS=$LIBS
+ AC_CHECK_LIB(c_r, pthread_exit)
+ if test "x$ac_cv_lib_c_r_pthread_exit" != "xyes"; then
+ CXXFLAGS=$save_CXXFLAGS
+ CFLAGS=$save_CFLAGS