https://gcc.gnu.org/bugzilla/show_bug.cgi?id=10740
etienne_lorrain at yahoo dot fr changed:
What |Removed |Added
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CC| |etienne_lorrain at yahoo dot fr
--- Comment #6 from etienne_lorrain at yahoo dot fr ---
I just had this error on Fedora26 compiling gcc-7-20171012.
It looks like it is due to the fact that I did not have flex installed.
Something like "sudo yum install flex" does install flex, but obviously does
not remove file ./host-x86_64-pc-linux-gnu/gcc/gengtype-lex.c so retrying "make
bootstrap" brings exactly the same error.
I did "make realclean" and again "./configure ..." and everything works.
Maybe "./contrib/download_prerequisites" should warn that flex is needed when
that command is not present...
