Index: unix/Makefile
===================================================================
--- unix/Makefile.orig	2010-05-21 13:11:26.128591070 +0200
+++ unix/Makefile	2010-05-21 13:14:45.429090869 +0200
@@ -809,7 +809,7 @@ isi:		unix_make
 linux:		unix_make
 	@echo 'NOTE:  use linux_noasm target for non-Intel Linux compiles.'
 	$(MAKE) unzips CC=gcc LD=gcc AS=gcc\
-	 CFLAGS="-O3 -Wall -DASM_CRC"\
+	 CFLAGS="$(RPM_OPT_FLAGS) -DASM_CRC"\
 	 AF="-Di386 $(AF)" CRCA_O=crc_gcc$O
 # GRR:  this echo is pointless; if user gets this far, no difference to install
 #	@echo 'Be sure to use the install_asm target rather than the install target'
@@ -819,7 +819,7 @@ linux_asm:	linux
 # Linux (Posix, approximately SysV):  virtually any version since before 0.96,
 # for any platform.  Change "-O" to "-O3" or whatever, as desired...
 linux_noasm:	unix_make
-	$(MAKE) unzips CC=gcc LD=gcc CFLAGS="-O -Wall"
+	$(MAKE) unzips CC=gcc LD=gcc CF="$(RPM_OPT_FLAGS)"
 
 # Linux with lcc compiler:  __inline__ (stat.h) not recognized, and must edit
 # /usr/include/gnu/types.h to get rid of "long long" if __LCC__ defined.  -O3