refactor(build): graduate unibilium VAR_FROM feature from 2017

cmake/FindUnibilium.cmake

@@ -8,22 +8,4 @@ add_library(unibilium INTERFACE)
 target_include_directories(unibilium SYSTEM BEFORE INTERFACE ${UNIBILIUM_INCLUDE_DIR})
 target_link_libraries(unibilium INTERFACE ${UNIBILIUM_LIBRARY})
 
-list(APPEND CMAKE_REQUIRED_INCLUDES "${UNIBILIUM_INCLUDE_DIR}")
-list(APPEND CMAKE_REQUIRED_LIBRARIES "${UNIBILIUM_LIBRARY}")
-check_c_source_compiles("
-#include <unibilium.h>
-
-int
-main(void)
-{
-  unibi_str_from_var(unibi_var_from_str(\"\"));
-  return unibi_num_from_var(unibi_var_from_num(0));
-}
-" UNIBI_HAS_VAR_FROM)
-list(REMOVE_ITEM CMAKE_REQUIRED_INCLUDES "${UNIBILIUM_INCLUDE_DIR}")
-list(REMOVE_ITEM CMAKE_REQUIRED_LIBRARIES "${UNIBILIUM_LIBRARY}")
-if(UNIBI_HAS_VAR_FROM)
-  target_compile_definitions(unibilium INTERFACE NVIM_UNIBI_HAS_VAR_FROM)
-endif()
-
 mark_as_advanced(UNIBILIUM_INCLUDE_DIR UNIBILIUM_LIBRARY)

src/nvim/tui/tui.c

@@ -60,27 +60,14 @@
 #define LINUXSET0C "\x1b[?0c"
 #define LINUXSET1C "\x1b[?1c"
 
-#ifdef NVIM_UNIBI_HAS_VAR_FROM
-# define UNIBI_SET_NUM_VAR(var, num) \
+#define UNIBI_SET_NUM_VAR(var, num) \
   do { \
     (var) = unibi_var_from_num((num)); \
   } while (0)
-# define UNIBI_SET_STR_VAR(var, str) \
+#define UNIBI_SET_STR_VAR(var, str) \
   do { \
     (var) = unibi_var_from_str((str)); \
   } while (0)
-#else
-# define UNIBI_SET_NUM_VAR(var, num) \
-  do { \
-    (var).p = NULL; \
-    (var).i = (num); \
-  } while (0)
-# define UNIBI_SET_STR_VAR(var, str) \
-  do { \
-    (var).i = INT_MIN; \
-    (var).p = str; \
-  } while (0)
-#endif
 
 typedef struct {
   int top, bot, left, right;