linking on macOS fails: lexer lib is -ll instead of -lfl
Gairlochan opened this issue · comments
Just thought I'd let you know it compiles fine on OS X if you change line 14 of the makefile from:
LDLIBS += -lm lfl
to:
LDLIBS += -lm ll
Hello, just bumped into this... if you're willing to use GNU extensions, here's a permanent fix:
UNAME = $(shell uname -s)
ifeq ($(UNAME),Darwin)
LDLIBS += -lm -ll
else
LDLIBS += -lm -lfl
endif
Here's the modified Makefile.
does macOS use flex and bison by default ? or are you changing those as well ?
it's a bit odd if macOS provided flex but not -lfl.
I have /usr/bin/flex (version flex 2.5.35 Apple(flex-31)). Don't have a vanilla macOS to check right now. I am assuming it is part of the Xcode command line tools that one installs with xcode-select --install.
No bison by default. Compile from GNU source or install with homebrew or macports.
As for the oddness, I don't have the mileage to answer. MacOS being of BSD descent, I would assume this to be historical in the System V vs. BSD race of the 80s (i.e. lex and yacc vs flex and Berkeley yacc).
the fix was embarrassingly easier to pull off. just force it to a compile-time constant and don't link anything in at all.