add "make mode=print <machine>" to print out compiler and linker flags and libs for any available makefile

src/Makefile

@@ -247,6 +247,11 @@ ifeq ($(mode),shlib)
 	@rm -f $(SHLINK)
 	@ln -s $(SHLIB) $(SHLINK)
 endif
+ifeq ($(mode),print)
+	@cd $(objdir); \
+	$(MAKE) $(MFLAGS) "OBJ = $(OBJLIB)" "INC = $(INC)" \
+	  "EXE = ../$(SHLIB)" -f ../Makefile.print
+endif
 
 # Remove machine-specific object files
 

src/Makefile.print

@@ -0,0 +1,22 @@
+# Makefile to allow printing current COMPILER/LINKER flags and settings
+
+print: do-print
+
+include Makefile
+
+# get location of the LAMMPS tree
+LMPDIR=$(shell echo $${PWD} | sed -e 's,/src/Obj_[+0-9a-z_-]\+$$,,')
+
+do-print:
+	@echo '# LAMMPS source tree is in:' $(LMPDIR)
+	@echo '# Compiler: '
+	@echo CXX=$(CC)
+	@echo '# Linker: '
+	@echo LD=$(LINK)
+	@echo '# Compilation: '
+	@echo CXXFLAGS=$(CCFLAGS) $(EXTRA_INC) | sed -e s,-I\\.\\./\\.\\./,-I${LMPDIR}/,g -e s,-I\\.\\./,-I${LMPDIR}/src/,g -e s,$(HOME),\\$$\\{HOME\\},g
+	@echo '# Linking: '
+	@echo LDFLAGS=$(LINKFLAGS)
+	@echo '# Libraries: '
+	@echo LDLIBS=$(EXTRA_PATH) $(EXTRA_LIB) $(LIB) | sed -e s,-L\\.\\./\\.\\./,-L${LMPDIR}/,g -e s,-L\\.\\./,-L${LMPDIR}/src/,g -e s,$(HOME),\\$$\\{HOME\\},g
+