Do not export internal symbols from generated parser/lexer

ChangeLog

 ????-??-??:
+ - Do not export internal symbols from generated parser/lexer
  - Do not distribute generated parser files
  - Check for libgpg-error. Link against it when needed.
  - Distribute README.txt

src/file/keydbcfg-lexer.l

@@ -20,12 +20,17 @@
 
 #include "keydbcfg-parser.h"
 
+#define YY_NO_UNISTD_H
+
 /* Disable some warnings triggered by generated scanner */
 #ifdef __GNUC__
 #pragma GCC diagnostic ignored "-Wredundant-decls"
 #pragma GCC diagnostic ignored "-Wunused-parameter"
+#pragma GCC visibility push(hidden)
 #endif
 
+int isatty(int i) { return 0; }
+
 static char *trim_string(const char *string);
 %}
 /* Options to generate reentrant lexer that's POSIX lex compatible. The

src/file/keydbcfg-parser.y

@@ -30,6 +30,7 @@
 #pragma GCC diagnostic ignored "-Wredundant-decls"
 #pragma GCC diagnostic ignored "-Wimplicit-function-declaration"
 #pragma GCC diagnostic ignored "-Wunused-parameter"
+#pragma GCC visibility push(hidden)
 #endif
 
 /* Fix some warnings trigger by -Wundef which can't be ignored */