I've tried twice to build Sage on a machine in which 'flex' was not in the path.
It has both times failed with:
make install in Singular
make[4]: Entering directory
`/export/home/drkirkby/32/sage-4.4.3/spkg/build/singular-3-1-0-4-20100214/src/Singular'
sh flexer.sh -I -Pyylp -t libparse.l >libparse.cc.lmp
flexer.sh: flex: not found
flexer.sh: test: argument expected
make[4]: *** [libparse.cc] Error 1
So is flex a requirement to build Sage? If it is, then I'll add to the 'prereq'
script a test for flex. If, which I doubt, it is only needed on Solaris, then
I'll make the test specific to Solaris.
The Solaris system has 'lex' in the path, and whilst 'flex' comes as part of
Solaris, it is in a directory (/usr/sfw/bin) which was not in the path on this
particular attempt at building.
I want to avoid forcing everyone to have flex installed if it is possible to
build Sage without flex, though I doubt that is the case.
Dave
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