use gcc -dumpspec, closes euslisp/EusLisp#485

lisp/Makefile.Linux

@@ -54,7 +54,22 @@ ADD_LDFLAGS += -Wl,--no-as-needed
 endif
 
 # set CPU arch with -D
-MACHINE=$(shell uname -m)
+GCC_MACHINE=$(shell gcc -dumpmachine)
+$(info "-- GCC_MACHINE = ${GCC_MACHINE}")
+ifneq ($(GCC_MACHINE),)
+ ifeq ($(GCC_MACHINE),x86_64-linux-gnu)
+   MACHINE=x86_64
+ endif
+ ifeq ($(GCC_MACHINE),i686-linux-gnu)
+   MACHINE=x86
+ endif
+ ifeq ($(GCC_MACHINE),aarch64-linux-gnu)
+   MACHINE=aarch64
+ endif
+ ifeq ($(GCC_MACHINE),arm-linux-gnueabihf)
+   MACHINE=arm
+ endif
+endif
 # need to set 'i486', for conditionals in c/*.[ch].
 ifneq ($(shell gcc -dumpmachine | grep "i.*86-linux"),)
   MACHINE=i486

lisp/Makefile.Linux.thread

@@ -91,7 +91,7 @@ GLLIB= -L$(ADLIBDIR) -lGLU -lGL -lXext -leusgl
 THREADDEP=mthread_posix.c
 #THREADDEP=pthreads.c
 
-ifeq ($(shell /bin/uname -m), x86_64)
+ifeq ($(shell gcc -dumpmachine | sed 's/\(.*\)-.*-.*/\1/'), x86_64)
 CC += -m32 -DUSE_MULTI_LIB
 LD += -melf_i386
 endif

lisp/Makefile.LinuxARM

@@ -36,7 +36,8 @@ XVERSION=X_V11R6_1
 
 #MACHINE=armv6
 #MACHINE=armv5te
-MACHINE=$(shell uname -m | sed 's/\(armv[0-9]\).*/\1/')
+# gcc -dumpmachine retruns target triplet consists of three fields separated by a hyphen (-).
+MACHINE=$(shell gcc -dumpmachine | sed 's/\(.*\)-.*-.*/\1/')
 
 GCC_MAJOR_VERSION=$(shell gcc -dumpversion | sed -e 's/\([0-9]\)\.\([0-9]\)\([\.0-9]*\)/\1/')
 GCC_MINOR_VERSION=$(shell gcc -dumpversion | sed -e 's/\([0-9]\)\.\([0-9]\)\([\.0-9]*\)/\2/')

lisp/image/jpeg/makefile

@@ -1,7 +1,14 @@
 # jpeg compression/decompression for euslisp
 # copyright (c) 1997, Toshihiro Matsui, Electrotechnical Laboratory
 
-OS = $(shell uname | sed s/-.*//)
+ifeq ($(shell gcc -dumpmachine | sed 's/.*-\(.*\)-.*/\1/'), linux)
+  OS=Linux
+else ifeq ($(shell gcc -dumpmachine | sed 's/.*-.*-\([a-zA-Z]*\).*/\1/'), darwin)
+  OS=Darwin
+else ifeq ($(shell gcc -dumpmachine | sed 's/.*-.*-\(.*\)/\1/'), cygwin)
+  OS=Cygwin
+endif
+endif
 ifeq ($(OS), Linux)
  LSFX = so
 else
@@ -18,7 +25,7 @@ else
  LD = gcc -dynamiclib
 endif
 
-ifeq ($(shell uname -m), x86_64)
+ifeq ($(shell gcc -dumpmachine | sed 's/\(.*\)-.*-.*/\1/'), x86_64)
 ifneq ($(ARCHDIR), Linux64)
 ifneq ($(ARCHDIR), Darwin)
 CC += -m32

test/Makefile

@@ -1,6 +1,12 @@
 GCC_MACHINE=$(shell gcc -dumpmachine)
 $(info "-- GCC_MACHINE = ${GCC_MACHINE}")
-OS=$(shell uname -s | sed 's/[^A-Za-z1-9].*//')
+ifeq ($(shell echo $(GCC_MACHINE) | sed 's/.*-\(.*\)-.*/\1/'), linux)
+  OS=Linux
+else ifeq ($(shell echo $(GCC_MACHINE) | sed 's/.*-.*-\([a-zA-Z]*\).*/\1/'), darwin)
+  OS=Darwin
+else ifeq ($(shell echo $(GCC_MACHINE) | sed 's/.*-.*-\(.*\)/\1/'), cygwin)
+  OS=Cygwin
+endif
 $(info "--      OS = ${OS}")
 ifeq ($(OS),Linux)
  export MAKEFILE=Makefile.Linux