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6.32.1. Installation of Flex
First, fix a problem introduced with glibc-2.26:
sed -i "/math.h/a #include <malloc.h>" src/flexdef.h
sed -i "/math.h/a #include <malloc.h>" src/flexdef.h
The build procedure assumes the help2man program is available to create a man page from the executable --help option. This is not present, so we use an environment variable to skip this process. Now, prepare Flex for compilation:
HELP2MAN=/tools/bin/true \
./configure --prefix=/usr --docdir=/usr/share/doc/flex-2.6.4
HELP2MAN=/tools/bin/true \
./configure --prefix=/usr --docdir=/usr/share/doc/flex-2.6.4
Compile the package:
make
make
To test the results (about 0.5 SBU), issue:
make check
make check
Install the package:
make install
make install
A few programs do not know about flex yet and try to run its predecessor, lex. To support those programs, create a symbolic link named lex that runs flex in lex emulation mode:
ln -sv flex /usr/bin/lex
ln -sv flex /usr/bin/lex