X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=configure.ac;h=38ae49f5090a1cf955f016d589fd114c1e222b6d;hb=dcc9f33357471e2e12623114f7558fcb084e47ae;hp=7bebd560b77bf7def9a4b53519b4a04eac290214;hpb=fdcf53c6886bbb73eb5094a6a1a16378059ecd4c;p=simgear.git

diff --git a/configure.ac b/configure.ac
index 7bebd560..38ae49f5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -437,11 +437,18 @@ esac
 AM_CONDITIONAL(HAVE_FRAMEWORK_PLIB, test "x$ac_cv_framework_PLIB" != "x")
 
 AC_CHECK_HEADER(plib/ul.h)
-if test "x$ac_cv_header_plib_ul_h" != "xyes"; then
+
+AC_CHECK_LIB(plibul,ulInit)
+if test "x$ac_cv_header_plib_ul_h" != "xyes" \
+  -o "x$ac_cv_lib_plibul_ulInit" != "xyes" ; then
     echo
     echo "You *must* have the plib library installed on your system to build"
     echo "SimGear!"
     echo
+    echo "     LIBS: '$LIBS'"
+    echo "  LDFLAGS: '$LDFLAGS'"
+    echo " CPPFLAGS: '$CPPFLAGS'"
+    echo
     echo "Please see README.plib for more details."
     echo
     echo "configure aborted."
@@ -496,7 +503,7 @@ case "${host}" in
         dnl This is needed when osg dynamic libs are specified 
         dnl instead of OSG frameworks on Mac OS X
         dnl
-        LDFLAGS="$LDFLAGS -L$with_osg"
+        AC_CHECK_LIB(OpenThreads,OpenThreadsGetVersion)
     fi
     ;;
 *)
@@ -507,15 +514,22 @@ case "${host}" in
     fi
     ;;
 esac
+
 AM_CONDITIONAL(HAVE_FRAMEWORK_OSG, test "x$ac_cv_framework_osg" != "x")
 
 AC_CHECK_HEADER(osg/Version)
+
 if test "x$ac_cv_header_osg_Version" != "xyes" -o "x$ac_cv_lib_OpenThreads_OpenThreadsGetVersion" != "xyes"; then
   if test "x$ac_cv_framework_osg" != "xyes"; then
     echo
-    echo "Warning: The OpenThreads library was not found on this system."
-    echo "         Mybe you forgot to sepcify --with-osg?"
-    echo "Without the OpenSceneGraph library FlightGear will not work."
+    echo "You *must* have the OpenThreads library installed on your system"
+    echo "to build this version of SimGear!"
+    echo "   Maybe you need to specify --with-osg=DIR."
+    echo "   Maybe you need to specify some LDFLAGS to help the linker."
+    echo
+    echo "     LIBS: '$LIBS'"
+    echo "  LDFLAGS: '$LDFLAGS'"
+    echo " CPPFLAGS: '$CPPFLAGS'"
     echo
     echo "Please see README.OSG for more details."
     echo
@@ -530,6 +544,10 @@ if test "x$ac_cv_header_boost_version_hpp" != "xyes"; then
     echo "You *must* have the Boost library installed on your system"
     echo "to build this version of SimGear!"
     echo
+    echo "     LIBS: '$LIBS'"
+    echo "  LDFLAGS: '$LDFLAGS'"
+    echo " CPPFLAGS: '$CPPFLAGS'"
+    echo
     echo "configure aborted."
     exit
 fi