Fixes to CROSS_COMPILE, don't override command line option from environment

Configure

@@ -1047,7 +1047,7 @@ $default_ranlib= &which("ranlib") or $default_ranlib="true";
 $perl=$ENV{'PERL'} or $perl=&which("perl5") or $perl=&which("perl")
   or $perl="perl";
 
-$cross_compile_prefix=$ENV{'CROSS_COMPILE'};
+$cross_compile_prefix=$ENV{'CROSS_COMPILE'} if $cross_compile_prefix eq "";
 
 chop $openssldir if $openssldir =~ /\/$/;
 chop $prefix if $prefix =~ /.\/$/;

Makefile.org

@@ -180,7 +180,7 @@ BUILDENV=	PLATFORM='$(PLATFORM)' PROCESSOR='$(PROCESSOR)' \
 		CC='$(CC)' CFLAG='$(CFLAG)' 			\
 		AS='$(CC)' ASFLAG='$(CFLAG) -c'			\
 		AR='$(AR)' NM='$(NM)' RANLIB='$(RANLIB)'	\
-		CROSS_COMPILE_PREFIX='$(CROSS_COMPILE_PREFIX)'	\
+		CROSS_COMPILE='$(CROSS_COMPILE)'	\
 		PERL='$(PERL)' ENGDIRS='$(ENGDIRS)'		\
 		SDIRS='$(SDIRS)' LIBRPATH='$(INSTALLTOP)/$(LIBDIR)'	\
 		INSTALL_PREFIX='$(INSTALL_PREFIX)'		\
@@ -394,7 +394,7 @@ dclean:
 
 rehash: rehash.time
 rehash.time: certs apps
-	@if [ -z "$(CROSS_COMPILE_PREFIX)" ]; then \
+	@if [ -z "$(CROSS_COMPILE)" ]; then \
 		(OPENSSL="`pwd`/util/opensslwrap.sh"; \
 		[ -x "apps/openssl.exe" ] && OPENSSL="apps/openssl.exe" || :; \
 		OPENSSL_DEBUG_MEMORY=on; \

Makefile.shared

@@ -281,7 +281,7 @@ link_a.cygwin:
 	fi; \
 	dll_name=$$SHLIB$$SHLIB_SOVER$$SHLIB_SUFFIX; \
 	$(PERL) util/mkrc.pl $$dll_name | \
-		$(CROSS_COMPILE_PREFIX)windres -o rc.o; \
+		$(CROSS_COMPILE)windres -o rc.o; \
 	extras="$$extras rc.o"; \
 	ALLSYMSFLAGS='-Wl,--whole-archive'; \
 	NOALLSYMSFLAGS='-Wl,--no-whole-archive'; \