master 679b9cc9ff: Link with libdl when using pgtk

[Robert Pluim]

branch: master
commit 679b9cc9ff3c65b4b6d3da2987703e0dfd3001be
Author: Robert Pluim <rpluim@gmail.com>
Commit: Robert Pluim <rpluim@gmail.com>

    Link with libdl when using pgtk
    
    * configure.ac: Define LIBMODULES on GNU/Linux when using pgtk, even
    when not using modules, since pgtkterm.c uses dlsym.  (Bug#54378)
---
 configure.ac | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/configure.ac b/configure.ac
index a315eeb6bd..bc17935eb1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3940,6 +3940,16 @@ case "${opsys}" in
   darwin) MODULES_SECONDARY_SUFFIX='.so' ;;
   *) MODULES_SECONDARY_SUFFIX='' ;;
 esac
+
+# pgtkterm.c uses dlsym
+if test $window_system = pgtk; then
+  case $opsys in
+    gnu|gnu-linux)
+    LIBMODULES="-ldl"
+    ;;
+  esac
+fi
+
 if test "${with_modules}" != "no"; then
   case $opsys in
     gnu|gnu-linux)