lua.c loads 'readline' dynamically

(See comments in luaconf.h.) This change allows easier compilation,
as Lua compiles and works even if the package 'readline' is absent
from the system. Moreover, non-interactive uses don't load the library,
making the stand-alone slightly faster for small loads.

1 files changed, 11 insertions, 0 deletions

diff --git a/luaconf.h b/luaconf.h
index fe98d9a9..65715c8b 100644
--- a/luaconf.h
+++ b/luaconf.h
@@ -58,15 +58,26 @@
 #endif
 
 
+/*
+** When Posix DLL ('LUA_USE_DLOPEN') is enabled, the Lua stand-alone
+** application will try to dynamically link a 'readline' facility
+** for its REPL.  In that case, LUA_READLINELIB is the name of the
+** library it will look for those facilities.  If lua.c cannot open
+** the specified library, it will generate a warning and then run
+** without 'readline'.  If that macro is not defined, lua.c will not
+** use 'readline'.
+*/
 #if defined(LUA_USE_LINUX)
 #define LUA_USE_POSIX
 #define LUA_USE_DLOPEN          /* needs an extra library: -ldl */
+#define LUA_READLINELIB         "libreadline.so"
 #endif
 
 
 #if defined(LUA_USE_MACOSX)
 #define LUA_USE_POSIX
 #define LUA_USE_DLOPEN          /* MacOS does not need -ldl */
+#define LUA_READLINELIB         "libedit.dylib"
 #endif