ifeq (SunOS,$(UNAME))
EXTRA_CFLAGS=-D_XOPEN_SOURCE=500 -D__EXTENSIONS__
+ PATH:=/usr/xpg4/bin:${PATH}
endif
ifeq (CYGWIN,$(findstring CYGWIN,$(UNAME)))
EXTRA_CFLAGS=-mno-cygwin
+ # GCC 4.x doesn't accept -mno-cygwin.
+ CC:=gcc-3
# SBCL can't read cygwin symlinks, and cygwin likes to symlink
# gcc. To further complicate things, SBCL can't handle cygwin
# paths, either.