use gcc -dumpmachine to detect target OS, istead of uname -m

see euslisp/EusLisp#486 and euslisp/EusLisp#485 for more info

Makefile

@@ -14,6 +14,12 @@ ifneq ($(GCC_MACHINE),)
  ifeq ($(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
 ifeq ($(MACHINE),)
  MACHINE=$(shell uname -m)
@@ -26,7 +32,7 @@ ifeq ($(OS),Linux)
   export ARCHDIR=Linux64
   export MAKEFILE=Makefile.Linux64
  else
- ifneq (, $(findstring armv,$(MACHINE)))
+ ifneq (, $(findstring arm,$(MACHINE)))
   export ARCHDIR=LinuxARM
   export MAKEFILE=Makefile.LinuxARM
  else ifneq (, $(findstring aarch,$(MACHINE)))

irteus/Makefile.Linux

@@ -72,7 +72,7 @@ CXXFLAGS=$(CFLAGS)
 CFLAGS+= -g -falign-functions=4
 CXXFLAGS+=-g -falign-functions=4
 
-ifeq ($(shell /bin/uname -m), x86_64)
+ifeq ($(shell gcc -dumpmachine), x86_64-linux-gnu)
 CC += -m32
 CXX += -m32
 LD += -m32

irteus/Makefile.LinuxARM

@@ -63,7 +63,8 @@ FFTW=-L/usr/local/lib -lfftw -lrfftw
 
 SVNVERSION=\"$(shell git rev-parse --short HEAD)\"
 
-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/')
 THREAD= -DTHREADED -DPTHREAD
 
 CFLAGS=-O2 -D$(MACHINE) -D$(ARCH) -DLinux -DARM -D_REENTRANT -DGCC -I$(EUSDIR)/include $(THREAD) -DSVNVERSION=$(SVNVERSION) -fPIC

irteus/PQP/Makefile.Linux

@@ -10,7 +10,7 @@ LPFX = lib
 LIBS = -L$(ARCHDIR) -lRAPID 
 
 
-ifeq ($(shell /bin/uname -m), x86_64)
+ifeq ($(shell gcc -dumpmachine), x86_64-linux-gnu)
 CC += -m32 
 LD += -m32
 EXELD += -m32