[office/tellico/4.2] src/3rdparty/btparse: don't leave _POSIX_C_SOURCE undefined

Git commit b43c4f8ce63c55e76035048fffd090017644e25f by Robby Stephenson.
Committed on 16/08/2026 at 22:04.
Pushed by rstephenson into branch '4.2'.

don't leave _POSIX_C_SOURCE undefined

M  +5    -2    src/3rdparty/btparse/btparse.h

https://invent.kde.org/office/tellico/-/commit/b43c4f8ce63c55e76035048fffd090017644e25f

diff --git a/src/3rdparty/btparse/btparse.h b/src/3rdparty/btparse/btparse.h
index 74d809629..87f684ffc 100644
--- a/src/3rdparty/btparse/btparse.h
+++ b/src/3rdparty/btparse/btparse.h
@@ -362,8 +362,11 @@ char * bt_format_name (bt_name * name, bt_name_format * format);
 // If POSIX_SOURCE existed before, bring back the saved value
 #undef _POSIX_C_SOURCE
 #ifdef TEMP_SAVE_POSIX_C_SOURCE
-    #define _POSIX_C_SOURCE TEMP_SAVE_POSIX_C_SOURCE
-    #undef TEMP_SAVE_POSIX_C_SOURCE
+  #define _POSIX_C_SOURCE TEMP_SAVE_POSIX_C_SOURCE
+  #undef TEMP_SAVE_POSIX_C_SOURCE
+#else
+// revert back to what had been the default (i.e. don't leave _POSIX_C_SOURCE undefined)
+  #define _POSIX_C_SOURCE 200809L
 #endif
 
 #endif /* BTPARSE_H */