newlib: rename mallocr.c to _mallocr.c

This file is a little confusing: it provides all of the mallocr logic,
but is compiled multiple times to produce a unique symbol each time.
For example, building mallocr.c with -DDEFINE_FREER produces freer.o
that only defines _free_r().  This is fine for most symbols, but it's
a little confusing when defining mallocr itself -- we produce a file
with the same symbol name, but we still need -DDEFINE_MALLOCR.  In
order to move the logic from the build rules to source files, using
mallocr.c both as a multiplexer and for defining a single symbol is a
bit tricky.  It's possible (if we add a lot of redundant preprocessor
checks to mallocr.c, or we add complicated build flags just for this
one files), but it's easier if we simply rename this to a dedicated
file.  So let's do that.

We do this as a dedicated commit because the next one will create a
new mallocr.c file and git's automatic diff algorithms can handle
trivial renames, but it can't handle renames+creates in the same
commit.

newlib/libc/stdlib/Makefile.am

@@ -180,40 +180,40 @@ lib_a_CFLAGS = $(AM_CFLAGS)
 lib_a_DEPENDENCIES = $(LIBADD_OBJS) $(ELIX_OBJS)
 LIB_COMPILE = $(AM_V_CC)$(COMPILE)
 
-$(lpfx)mallocr.o: mallocr.c
+$(lpfx)mallocr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MALLOC -c $< -o $@
 
-$(lpfx)freer.o: mallocr.c
+$(lpfx)freer.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_FREE -c $< -o $@
 
-$(lpfx)reallocr.o: mallocr.c
+$(lpfx)reallocr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_REALLOC -c $< -o $@
 
-$(lpfx)callocr.o: mallocr.c
+$(lpfx)callocr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_CALLOC -c $< -o $@
 
-$(lpfx)cfreer.o: mallocr.c
+$(lpfx)cfreer.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_CFREE -c $< -o $@
 
-$(lpfx)malignr.o: mallocr.c
+$(lpfx)malignr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MEMALIGN -c $< -o $@
 
-$(lpfx)vallocr.o: mallocr.c
+$(lpfx)vallocr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_VALLOC -c $< -o $@
 
-$(lpfx)pvallocr.o: mallocr.c
+$(lpfx)pvallocr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_PVALLOC -c $< -o $@
 
-$(lpfx)mallinfor.o: mallocr.c
+$(lpfx)mallinfor.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MALLINFO -c $< -o $@
 
-$(lpfx)mallstatsr.o: mallocr.c
+$(lpfx)mallstatsr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MALLOC_STATS -c $< -o $@
 
-$(lpfx)msizer.o: mallocr.c
+$(lpfx)msizer.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MALLOC_USABLE_SIZE -c $< -o $@
 
-$(lpfx)malloptr.o: mallocr.c
+$(lpfx)malloptr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MALLOPT -c $< -o $@
 
 $(lpfx)dtoa.o: dtoa.c mprec.h

newlib/libc/stdlib/Makefile.in

@@ -1475,40 +1475,40 @@ uninstall-am:
 .PRECIOUS: Makefile
 
 
-$(lpfx)mallocr.o: mallocr.c
+$(lpfx)mallocr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MALLOC -c $< -o $@
 
-$(lpfx)freer.o: mallocr.c
+$(lpfx)freer.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_FREE -c $< -o $@
 
-$(lpfx)reallocr.o: mallocr.c
+$(lpfx)reallocr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_REALLOC -c $< -o $@
 
-$(lpfx)callocr.o: mallocr.c
+$(lpfx)callocr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_CALLOC -c $< -o $@
 
-$(lpfx)cfreer.o: mallocr.c
+$(lpfx)cfreer.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_CFREE -c $< -o $@
 
-$(lpfx)malignr.o: mallocr.c
+$(lpfx)malignr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MEMALIGN -c $< -o $@
 
-$(lpfx)vallocr.o: mallocr.c
+$(lpfx)vallocr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_VALLOC -c $< -o $@
 
-$(lpfx)pvallocr.o: mallocr.c
+$(lpfx)pvallocr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_PVALLOC -c $< -o $@
 
-$(lpfx)mallinfor.o: mallocr.c
+$(lpfx)mallinfor.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MALLINFO -c $< -o $@
 
-$(lpfx)mallstatsr.o: mallocr.c
+$(lpfx)mallstatsr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MALLOC_STATS -c $< -o $@
 
-$(lpfx)msizer.o: mallocr.c
+$(lpfx)msizer.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MALLOC_USABLE_SIZE -c $< -o $@
 
-$(lpfx)malloptr.o: mallocr.c
+$(lpfx)malloptr.o: _mallocr.c
 	$(LIB_COMPILE) -DDEFINE_MALLOPT -c $< -o $@
 
 $(lpfx)dtoa.o: dtoa.c mprec.h