Fix cross-compile by adding LD variable

Fixes cross-build error due to commit
a449ff8.

Hard-coding "ld" when cross-compiling is a bad idea.

Author: bkuhls

src/OS/Makefile-Base

@@ -1065,7 +1065,7 @@ dynmodules: buildlookups buildrouters buildtransports buildauths \
 buildlookups: config
 	 @cd lookups && $(MAKE) SHELL=$(SHELL) AR="$(AR)" $(MFLAGS) CC="$(CC)" CFLAGS="$(CFLAGS)" \
 	   CFLAGS_DYNAMIC="$(CFLAGS_DYNAMIC)" HDRS="../version.h $(PHDRS)" \
-	   FE="$(FE)" RANLIB="$(RANLIB)" RM_COMMAND="$(RM_COMMAND)" \
+	   FE="$(FE)" RANLIB="$(RANLIB)" LD="$(LD)" RM_COMMAND="$(RM_COMMAND)" \
 	   INCLUDE="$(INCLUDE) $(IPV6_INCLUDE) $(TLS_INCLUDE) $(LOOKUP_INCLUDE)"
 	 @echo " "
 
@@ -1074,7 +1074,7 @@ buildlookups: config
 buildrouters: config
 	 @cd routers && $(MAKE) SHELL=$(SHELL) AR="$(AR)" $(MFLAGS) CC="$(CC)" CFLAGS="$(CFLAGS)" \
 	   CFLAGS_DYNAMIC="$(CFLAGS_DYNAMIC)" \
-	   FE="$(FE)" RANLIB="$(RANLIB)" RM_COMMAND="$(RM_COMMAND)" HDRS="$(PHDRS)" \
+	   FE="$(FE)" RANLIB="$(RANLIB)" LD="$(LD)" RM_COMMAND="$(RM_COMMAND)" HDRS="$(PHDRS)" \
 	   INCLUDE="$(INCLUDE) $(IPV6_INCLUDE) $(TLS_INCLUDE)"
 	 @echo " "
 
@@ -1083,7 +1083,7 @@ buildrouters: config
 buildtransports: config
 	 @cd transports && $(MAKE) SHELL=$(SHELL) AR="$(AR)" $(MFLAGS) CC="$(CC)" CFLAGS="$(CFLAGS)" \
 	   CFLAGS_DYNAMIC="$(CFLAGS_DYNAMIC)" \
-	   FE="$(FE)" RANLIB="$(RANLIB)" RM_COMMAND="$(RM_COMMAND)" HDRS="$(PHDRS)" \
+	   FE="$(FE)" RANLIB="$(RANLIB)" LD="$(LD)" RM_COMMAND="$(RM_COMMAND)" HDRS="$(PHDRS)" \
 	   INCLUDE="$(INCLUDE) $(IPV6_INCLUDE) $(TLS_INCLUDE)"
 	 @echo " "
 
@@ -1092,7 +1092,7 @@ buildtransports: config
 buildauths: config
 	 @cd auths && $(MAKE) SHELL=$(SHELL) AR="$(AR)" $(MFLAGS) CC="$(CC)" CFLAGS="$(CFLAGS)" \
 	   CFLAGS_DYNAMIC="$(CFLAGS_DYNAMIC)" \
-	   FE="$(FE)" RANLIB="$(RANLIB)" RM_COMMAND="$(RM_COMMAND)" HDRS="$(PHDRS)" \
+	   FE="$(FE)" RANLIB="$(RANLIB)" LD="$(LD)" RM_COMMAND="$(RM_COMMAND)" HDRS="$(PHDRS)" \
 	   INCLUDE="$(INCLUDE) $(IPV6_INCLUDE) $(TLS_INCLUDE)"
 	 @echo " "
 
@@ -1101,7 +1101,7 @@ buildmisc: config
 	   CC="$(CC)" CFLAGS="$(CFLAGS)" \
 	     CFLAGS_DYNAMIC="$(CFLAGS_DYNAMIC)" \
 	     LDFLAGS_PARTIAL="$(LDFLAGS_PARTIAL)" HDRS="../version.h $(PHDRS)" \
-	     FE="$(FE)" RANLIB="$(RANLIB)" RM_COMMAND="$(RM_COMMAND)" \
+	     FE="$(FE)" RANLIB="$(RANLIB)" LD="$(LD)" RM_COMMAND="$(RM_COMMAND)" \
 	     PERL_CC="$(PERL_CC)" PERL_CCOPTS="$(PERL_CCOPTS)" \
 	     PERL_CFLAGS="$(PERL_CFLAGS)" PERL_LFLAGS="$(PERL_LFLAGS)" \
 	     INCLUDE="$(INCLUDE) $(IPV6_INCLUDE)" TLS_INCLUDE="$(TLS_INCLUDE)"

src/OS/Makefile-Default

@@ -227,6 +227,7 @@ HOSTNAME_COMMAND=/bin/hostname
 
 RANLIB=ranlib
 
+LD=ld
 
 # EXIM_CHMOD is available to specify a command that is automatically applied
 # to the Exim binary immediately it is compiled. (I find this useful when

src/src/miscmods/Makefile

@@ -62,7 +62,7 @@ dkim.o:
 	$(FE)$(CC) -c $(CFLAGS) $(INCLUDE) pdkim.c
 	$(FE)$(CC) -c $(CFLAGS) $(INCLUDE) $(TLS_INCLUDE) signing.c
 	$(FE)mv dkim.o dkim_tmp.o
-	$(FE)ld -r -o dkim.o $(LDFLAGS_PARTIAL) \
+	$(FE)$(LD) -r -o dkim.o $(LDFLAGS_PARTIAL) \
 		dkim_tmp.o dkim_transport.o pdkim.o signing.o
 
 # Similarly, we want a single .so for the dynamic-load module