From ff91ce148f8dd32ea84debf71b16580043ed9002 Mon Sep 17 00:00:00 2001
From: Adrian Insaurralde Avalos <adrianinsaval@gmail.com>
Date: Fri, 29 Aug 2025 18:13:29 -0300
Subject: [PATCH] Mesh: fix #18801 - simply call `gmsh` if gmsh executable path
 is empty

---
 src/Mod/Mesh/Gui/RemeshGmsh.cpp | 3 +++
 src/Mod/Mesh/Gui/RemeshGmsh.ui  | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/src/Mod/Mesh/Gui/RemeshGmsh.cpp b/src/Mod/Mesh/Gui/RemeshGmsh.cpp
index 6242b8c3d1..f33129db76 100644
--- a/src/Mod/Mesh/Gui/RemeshGmsh.cpp
+++ b/src/Mod/Mesh/Gui/RemeshGmsh.cpp
@@ -184,6 +184,9 @@ void GmshWidget::accept()
     if (writeProject(inpFile, outFile)) {
         // ./gmsh - -bin -2 /tmp/mesh.geo -o /tmp/best.stl
         QString proc = d->ui.fileChooser->fileName();
+        if (proc.isEmpty()) {
+            proc = QLatin1String("gmsh");
+        }
         QStringList args;
         args << QLatin1String("-")
              << QLatin1String("-bin")
diff --git a/src/Mod/Mesh/Gui/RemeshGmsh.ui b/src/Mod/Mesh/Gui/RemeshGmsh.ui
index 88c74c7aa5..88f1290e22 100644
--- a/src/Mod/Mesh/Gui/RemeshGmsh.ui
+++ b/src/Mod/Mesh/Gui/RemeshGmsh.ui
@@ -137,6 +137,9 @@
         </item>
         <item>
          <widget class="Gui::PrefFileChooser" name="fileChooser">
+          <property name="toolTip">
+           <string>Leave empty to use default gmsh executable</string>
+          </property>
           <property name="prefEntry" stdset="0">
            <cstring>gmshExe</cstring>
           </property>