configure25: check for some more functions in libm in lpsolve check, needed on some systems

2 files changed, 94 insertions, 0 deletions

diff --git a/configure b/configure
index 9e4cb8c8c1d5..9398763e80ae 100755
--- a/configure
+++ b/configure
@@ -18526,6 +18526,97 @@ else
 fi
 
 
+    # some systems need this. Like Ubuntu....
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for floor in -lm" >&5
+$as_echo_n "checking for floor in -lm... " >&6; }
+if test "${ac_cv_lib_m_floor+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char floor ();
+int
+main ()
+{
+return floor ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_floor=yes
+else
+  ac_cv_lib_m_floor=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_floor" >&5
+$as_echo "$ac_cv_lib_m_floor" >&6; }
+if test "x$ac_cv_lib_m_floor" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for dlopen in -ldl" >&5
+$as_echo_n "checking for dlopen in -ldl... " >&6; }
+if test "${ac_cv_lib_dl_dlopen+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldl  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen ();
+int
+main ()
+{
+return dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_dl_dlopen=yes
+else
+  ac_cv_lib_dl_dlopen=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
+$as_echo "$ac_cv_lib_dl_dlopen" >&6; }
+if test "x$ac_cv_lib_dl_dlopen" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBDL 1
+_ACEOF
+
+  LIBS="-ldl $LIBS"
+
+fi
+
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking for make_lp in -llpsolve55" >&5
 $as_echo_n "checking for make_lp in -llpsolve55... " >&6; }
 if test "${ac_cv_lib_lpsolve55_make_lp+set}" = set; then :
diff --git a/configure.in b/configure.in
index dd07942b2eae..d521763e9fbb 100644
--- a/configure.in
+++ b/configure.in
@@ -5158,6 +5158,9 @@ if test -n "$with_system_lpsolve" -o -n "$with_system_libs" && \
     SYSTEM_LPSOLVE=YES
     AC_CHECK_HEADER(lpsolve/lp_lib.h, [],
        [ AC_MSG_ERROR(lpsolve headers not found.)], [])
+    # some systems need this. Like Ubuntu....
+    AC_CHECK_LIB(m, floor)
+    AC_CHECK_LIB(dl, dlopen)
     AC_CHECK_LIB(lpsolve55, make_lp, ,
         [ AC_MSG_ERROR(lpsolve library not found or too old.)], [])
 else