Add new compile flag: CC_O0 (zero compiler optimizations)

The idea is to decouple DBG_MALLOC from also completely disabling
compiler optimizations.  Maybe someone wants to deploy a debugging build
to production that doesn't run like a wheelbarrow.

Author: liviuchircu

Makefile.conf.template

@@ -90,6 +90,7 @@ DEFS+= -DDBG_MALLOC #Include additional, debug-enabled allocator flavors
 #DEFS+= -DDBG_TCPCON #Attach struct history info to all TCP connections
 #DEFS+= -DNOSMP #Do not use SMP compliant locking. Faster but won't work on SMP machines
 #DEFS+= -DEXTRA_DEBUG #Compiles in some extra debugging code
+DEFS+= -DCC_O0 #Zero compiler optimizations (FAST compile, SLOW code. For devs)
 #DEFS+= -DORACLE_USRLOC #Uses Oracle compatible queries for USRLOC
 #DEFS+= -DSHM_EXTRA_STATS #Provides tools to get extra statistics for the shared memory used
 #DEFS+= -DUNIT_TESTS #Include unit testing code into opensips and modules

Makefile.defs

@@ -786,7 +786,7 @@ endif
 CFLAGS=$(shell echo "$${CFLAGS}")
 LDFLAGS+=
 
-ifneq (,$(findstring DBG_MALLOC, $(DEFS)))
+ifneq (,$(findstring CC_O0, $(DEFS)))
 	CC_OPTIMIZE_FLAG?=-O0
 endif
 

version.h

@@ -105,6 +105,12 @@
 #define DBG_MALLOC_STR ""
 #endif
 
+#ifdef CC_O0
+#define CC_O0_STR ", CC_O0"
+#else
+#define CC_O0_STR ""
+#endif
+
 #ifdef DEBUG_DMALLOC
 #define DEBUG_DMALLOC_STR ", DEBUG_DMALLOC"
 #else
@@ -175,7 +181,7 @@
 	STATS_STR EXTRA_STATS_STR EXTRA_DEBUG_STR \
 	DISABLE_NAGLE_STR USE_MCAST_STR NO_DEBUG_STR NO_LOG_STR \
 	SHM_MMAP_STR PKG_MALLOC_STR Q_MALLOC_STR F_MALLOC_STR \
-	HP_MALLOC_STR DBG_MALLOC_STR \
+	HP_MALLOC_STR DBG_MALLOC_STR CC_O0_STR \
 	DEBUG_DMALLOC_STR QM_JOIN_FREE_STR FAST_LOCK_STR NOSMP_STR \
 	USE_PTHREAD_MUTEX_STR USE_UMUTEX_STR USE_POSIX_SEM_STR \
 	USE_SYSV_SEM_STR DBG_LOCK_STR