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Detect the compiler version and set the correct GCC flag

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If the version is not supported by the Makefile, the flag for the latest
version supported is set instead.

(cherry picked from commit bf90fbb91f28af30ff79523681e7f73e60121535)
This commit is contained in:
James R 2020-06-17 22:49:12 -07:00
parent f1ba06351c
commit 2610163096
1 changed files with 37 additions and 0 deletions
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37
src/Makefile.cfg
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@ -1,3 +1,4 @@
# vim: ft=make
#
# Makefile.cfg for SRB2
#
@ -7,6 +8,42 @@
# and other things
#
# See the following variable don't start with 'GCC'. This is
# to avoid a false positive with the version detection...
SUPPORTED_GCC_VERSIONS:=\
91\
81 82 83\
71 72\
61 62 63 64\
51 52 53 54\
40 41 42 43 44 45 46 47 48 49
LATEST_GCC_VERSION=9.1
# Automatically set version flag, but not if one was manually set
ifeq (,$(filter GCC%,$(.VARIABLES)))
ifneq (,$(findstring GCC,$(shell $(CC) --version))) # if it's GCC
version:=$(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 $(v),$(SUPPORTED_GCC_VERSIONS)))
$(info\
Your compiler version, GCC $(version) is not supported by the Makefile.\
The Makefile will assume GCC $(LATEST_GCC_VERSION).)
GCC$(subst .,,$(LATEST_GCC_VERSION))=1
else
$(info Detected GCC $(version) (GCC$(v)))
GCC$(v)=1
endif
endif
endif
ifdef GCC91
GCC83=1
endif