SRB2/src/Makefile.d/detect.mk
James R b31056c7d9 Rewrite Makefile to be modular as well as more automated
Some key points for programmers:
- Source code files are mostly listed in a 'Sourcefile'.
  So you no longer directly edit the object list. There
  can be multiple Sourcefiles and they can even live in
  subdirectories--the directory name will be prepended to
  every filename in the list. Of course, the Makefile
  still needs to be edited to read from each Sourcefile.
- Different rules are no longer required for source code
  files that live in subdirectories (such as sdl/ or
  hardware/). Subdirectories Just Work so go ham!

In addition to those points, another important change is
that the bin directory is no longer divided into platform
subdirectories (Linux64, Mingw, etc). Executables now go
directly into bin. If you use DEBUGMODE or target 64-bit,
then subdirectories for 'debug' and '64' will be made
though.

Oh by the way, I don't think make clean actually removed
files before on Windows. It should now. I also fixed as
many little inconsistencies like that as I noticed.

And now just an overview of the technical aspects that
shouldn't affect anyone who doesn't REALLY care about the
Makefile...

objs and dep directories have been moved to a make
directory. Makefile.cfg and its variants have been moved
out of their various subdirectories to src/Makefile.d
make distclean removes the bin and make directories
entirely, but make clean and cleandep still only affect
the current build target.

When I say automation, I mean that a lot of copy pasting
in the Makefile has been reduced.
2021-05-04 04:22:37 -07:00

104 lines
1.9 KiB
Makefile

#
# Detect the host system and compiler version.
#
# Previously featured:\
PANDORA\
HAIKU\
DUMMY\
DJGPPDOS\
SOLARIS\
MACOSX\
all_systems:=\
LINUX64\
MINGW64\
MINGW\
UNIX\
LINUX\
FREEBSD\
SDL\
# check for user specified system
ifeq (,$(filter $(all_systems),$(.VARIABLES)))
ifeq ($(OS),Windows_NT) # all windows are Windows_NT...
_m=Detected a Windows system,\
compiling for 32-bit MinGW SDL...)
$(call Print,$(_m))
# go for a 32-bit sdl mingw exe by default
MINGW:=1
WINDOWSHELL:=1
else # if you on the *nix
system:=$(shell uname -s)
ifeq ($(system),Linux)
new_system:=LINUX
else
$(error \
Could not automatically detect your system,\
try specifying a system manually)
endif
ifeq ($(shell getconf LONG_BIT),64)
system+=64-bit
new_system:=$(new_system)64
endif
$(call Print,Detected $(system) ($(new_system))...)
$(new_system):=1
endif
endif
# This must have high to low order.
gcc_versions:=\
102 101\
93 92 91\
84 83 82 81\
75 74 73 72 71\
64 63 62 61\
55 54 53 52 51\
49 48 47 46 45 44 43 42 41 40
latest_gcc_version:=10.2
# Automatically set version flag, but not if one was
# manually set. And don't bother if this is a clean only
# run.
ifeq (,$(call Wildvar,GCC% destructive))
version:=$(shell $(CC) --version)
# check if this is in fact GCC
ifneq (,$(or $(findstring gcc,$(version)),\
$(findstring GCC,$(version))))
version:=$(shell $(CC) -dumpversion)
# Turn version into words of major, minor
v:=$(subst ., ,$(version))
# concat. major minor
v:=$(word 1,$(v))$(word 2,$(v))
# If this version is not in the list,
# default to the latest supported
ifeq (,$(filter $(v),$(gcc_versions)))
define line =
Your compiler version, GCC $(version), \
is not supported by the Makefile.
The Makefile will assume GCC $(latest_gcc_version).))
endef
$(call Print,$(line))
GCC$(subst .,,$(latest_gcc_version)):=1
else
$(call Print,Detected GCC $(version) (GCC$(v)))
GCC$(v):=1
endif
endif
endif