css.c: No such file or directory when lex lib not found during build

[David Cepelik]

Hi all,

I noticed some strange behavior when building recent wget (fbbdf9ea)
from sources using recent Flex (d30bdf4) built from sources. I tracked
the issue down to Flex [1], but I thought that wget's toolchain made the
problem harder to debug, so I figured it might be a good think to report
it here as well.

In a nutshell, when lex library is not detected, configure will output
the following:

    [...]
    checking for flex... flex
    checking for lex output file root... lex.yy
    checking for lex library... not found
    configure: WARNING: required lex library not found; giving up on flex
    [...]

which gets drowned in the rest of the output. Even though the library is
"required" as per the warning above, the build process continues and
eventually crashes with,

    [...]
    echo '#include "wget.h"' > css_.c
    cat css.c >> css_.c
    cat: css.c: No such file or directory
    make[3]: *** [Makefile:3156: css_.c] Error 1
    [...]

This is because LEX defaults to : in src/Makefile:

    [...]
      CC       convert.o
      CC       cookies.o
    :  -ocss.c css.l
      CC       ftp.o
      CC       css-url.o
    [...]

Is this expected?

                                            Best, David

[1] https://github.com/westes/flex/issues/565

signature.asc
Description: signature