more debug info in "about"

Author: jcupitt

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - fix kplot on win
 - build polishing
+- more debug info in "about"
 
 ## 9.0.1 2025/02/24
 

src/main.c

@@ -47,7 +47,7 @@ gboolean main_option_time_save = FALSE;
 gboolean main_option_profile = FALSE;
 gboolean main_option_no_load_menus = FALSE;
 
-static const char *main_argv0 = NULL; /* argv[0] */
+const char *main_argv0 = NULL; /* argv[0] */
 
 static char prefix_buffer[VIPS_PATH_MAX];
 static gboolean prefix_valid = FALSE;

src/main.h

@@ -27,6 +27,7 @@ extern Watchgroup *main_watchgroup;
 extern Imageinfogroup *main_imageinfogroup;
 
 extern void *main_c_stack_base;
+extern const char *main_argv0;
 
 extern gboolean main_option_time_save;
 extern gboolean main_option_profile;

src/mainwindow.c

@@ -1011,8 +1011,12 @@ mainwindow_size_images(VipsObject *object, size_t *size)
 void
 mainwindow_about(Mainwindow *main, VipsBuf *buf)
 {
-	double sz = find_space(PATH_TMP);
+	vips_buf_appendf(buf, _("argv0 = %s\n"), main_argv0);
+	vips_buf_appendf(buf, _("prefix = %s\n"), get_prefix());
+	vips_buf_appendf(buf, _("VIPSHOME = %s\n"), g_getenv("VIPSHOME"));
+	vips_buf_appendf(buf, "\n");
 
+	double sz = find_space(PATH_TMP);
 	if (sz < 0)
 		vips_buf_appendf(buf, _("no temp area\n"));
 	else {