On 12/08/13 17:37, Martin Ward wrote:
On 12/08/13 15:34, Martin Ward wrote:
10.27.1
Bison 2.7.1, still need ac_cv_prog_lex_is_flex=yes on the command
line other wise it won't configure
Bison 3.0 is even worse, not only that, couldn't get it to
cross-compile, seems to run an architecture dependant to get generate
doc/help files, but also needs ac_cv_prog_lex_is_flex=yes to succeed,
but complains about a hard coded m4 invocation(cross-tools) from
flex(installed in tools) in generating some test files
cheers
martin
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Replying to myself
It does look like both bison and flex hard codes the path of m4 into
the binary, the only reason I found this out was trying to get Bison
3,0 to cross-compile, didn't work so went back to to 2.7.1. However in
the final phase tried again with 3.0, but I normally rename
/cross-tools, and found after that when trying to do a make check, it
couldn't find m4, even though I had just installed it bit of detective
work, found out both bison and flex embed the path of m4 into the
binary!!!
The solution seems to fix it is by appending ac_cv_path_M4=m4 to both
bison and flex configure lines although flex seems to be the culprit
in this case
The M4 in cross tools is good enough to pass all the autoconf tests..
regards
Martin
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More stuff further investigation see
https://lists.yoctoproject.org/pipermail/poky/2012-January/007403.html
and others
Running strings -a | grep m4 on the bison and flex executables did
indeed show hard coded paths embedded
Rather than appending ac_cv_path_M4=m4 to the configure lines in the
tempphase, just make sure that m4 is cross-compiled before either bison
or flex, this should then at least get the right version , .i.e
/tools/bin/m4 to be run when needed
regards
martin
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