[Libguestfs] [PATCH] builder: fix EOF check with flex >= 2.6.1

It looks like flex 2.6.1 changed [1] the return code for EOF in yyinput. Therefore, use the right value depending on the version of flex which generates the lexer. [1] https://github.com/westes/flex/commit/f863c9490e6912ffcaeb12965fb3a567a10... --- builder/index-scan.l | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/builder/index-scan.l b/builder/index-scan.l index d4db826..bdb474b 100644 --- a/builder/index-scan.l +++ b/builder/index-scan.l @@ -45,6 +45,14 @@ extern void scanner_init (yyscan_t *scanner, struct parse_context *context, FILE *in); extern void scanner_destroy (yyscan_t scanner); +#if (YY_FLEX_MAJOR_VERSION > 2) \ + || ((YY_FLEX_MAJOR_VERSION == 2) && (YY_FLEX_MINOR_VERSION > 6)) \ + || ((YY_FLEX_MAJOR_VERSION == 2) && (YY_FLEX_MINOR_VERSION == 6) && (YY_FLEX_SUBMINOR_VERSION >= 1)) +#define IS_EOF 0 +#else +#define IS_EOF EOF +#endif + %} %option nounput @@ -104,7 +112,7 @@ extern void scanner_destroy (yyscan_t scanner); int c, prevnl = 0; /* Eat everything to the first blank line. */ - while ((c = input (yyscanner)) != EOF) { + while ((c = input (yyscanner)) != IS_EOF) { if (c == '\n' && prevnl) break; prevnl = c == '\n'; @@ -116,7 +124,7 @@ extern void scanner_destroy (yyscan_t scanner); /* Hack to eat the PGP epilogue. */ ^"-----BEGIN PGP SIGNATURE-----\n" { /* Eat everything to the end of the file. */ - while (input (yyscanner) != EOF) + while (input (yyscanner) != IS_EOF) ; return PGP_EPILOGUE; -- 2.7.4