diff --git a/Changes b/Changes
index f1b9b5508..915662741 100644
--- a/Changes
+++ b/Changes
@@ -5,6 +5,8 @@ indicates the contributor was also the author of the fix; Thanks!
 
 * Verilator 3.821****
 
+**** Fix PowerPC runtime error, bug288. [Ahmed El-Mahmoudy]
+
 **** Fix internal error on integer casts, bug374. [Chandan Egbert]
 
 * Verilator 3.820 2011/07/28
diff --git a/src/Makefile_obj.in b/src/Makefile_obj.in
index 869630e97..8defbf7d2 100644
--- a/src/Makefile_obj.in
+++ b/src/Makefile_obj.in
@@ -58,7 +58,7 @@ pkgdatadir = @pkgdatadir@
 
 # Compile options
 CFG_WITH_DEFENV = @CFG_WITH_DEFENV@
-CPPFLAGSNOWALL += @CPPFLAGS@
+CPPFLAGS += @CPPFLAGS@
 LDFLAGS += @LDFLAGS@
 
 #### End of system configuration section. ####
@@ -85,17 +85,18 @@ endif
 # -lfl not needed as Flex invoked with %nowrap option
 LIBS = -lm
 
-CPPFLAGSNOWALL += -MMD
-CPPFLAGSNOWALL += -I. -I$(bldsrc) -I$(srcdir) -I$(incdir)
-CPPFLAGSNOWALL += -DYYDEBUG 	# Required to get nice error messages
-#CPPFLAGSNOWALL += -DVL_LEAK_CHECKS 	# If running valgrind or other hunting tool
-CPPFLAGSNOWALL += $(COPT)
-CPPFLAGS = $(CPPFLAGSNOWALL)
+CPPFLAGS += -MMD
+CPPFLAGS += -I. -I$(bldsrc) -I$(srcdir) -I$(incdir)
+CPPFLAGS += -DYYDEBUG 	# Required to get nice error messages
+#CPPFLAGS += -DVL_LEAK_CHECKS 	# If running valgrind or other hunting tool
+CPPFLAGS += $(COPT)
+CPPFLAGS += -MP # Only works on recent GCC versions
 ifeq ($(VERILATOR_AUTHOR_SITE),1)	# Local... Else don't burden users
-CPPFLAGSNOWALL += -MP	# Only works on recent GCC versions
 CPPFLAGS += -W -Wall -Wno-unused-parameter -Wno-char-subscripts -Werror
 #CPPFLAGS += -pedantic-errors
 endif
+CPPFLAGSWALL   = $(CPPFLAGS)
+CPPFLAGSNOWALL = $(CPPFLAGS)
 
 ifneq ($(SYSTEMPERL),)	# Intuit SYSTEMPERL_INCLUDE as it's new
  SYSTEMPERL_INCLUDE ?= $(SYSTEMPERL)/src
@@ -262,9 +263,9 @@ V3Number_test: V3Number_test.o
 	$(PERL) $(ASTGEN) -I$(srcdir) $*.cpp
 
 %.o:	%.cpp
-	$(OBJCACHE) ${CXX} ${CPPFLAGS} -c $<
+	$(OBJCACHE) ${CXX} ${CPPFLAGSWALL} -c $<
 %.o:	%.c
-	$(OBJCACHE) ${CC}  ${CPPFLAGS} -c $<
+	$(OBJCACHE) ${CC}  ${CPPFLAGSWALL} -c $<
 
 V3ParseLex.o:	V3ParseLex.cpp V3Lexer.yy.cpp V3ParseBison.c
 	$(OBJCACHE) ${CXX} ${CPPFLAGSNOWALL} -c $<
diff --git a/src/V3AstNodes.h b/src/V3AstNodes.h
index 928aa5d9a..e9713bff4 100644
--- a/src/V3AstNodes.h
+++ b/src/V3AstNodes.h
@@ -3465,7 +3465,7 @@ struct AstBufIf1 : public AstNodeBiop {
     virtual void numberOperate(V3Number& out, const V3Number& lhs, const V3Number& rhs) { out.opBufIf1(lhs,rhs); }
     virtual string emitVerilog() { return "bufif(%r,%l)"; }
     virtual string emitC() { V3ERROR_NA; return "";}  // Lclean || Rclean
-    virtual string emitSimpleOperator() { V3ERROR_NA; return false;}  // Lclean || Rclean
+    virtual string emitSimpleOperator() { V3ERROR_NA; return "";}  // Lclean || Rclean
     virtual bool cleanOut() {V3ERROR_NA; return "";}  // Lclean || Rclean
     virtual bool cleanLhs() {return false;} virtual bool cleanRhs() {return false;}
     virtual bool sizeMattersLhs() {return false;} virtual bool sizeMattersRhs() {return false;}
diff --git a/src/V3ParseImp.h b/src/V3ParseImp.h
index 87ff0f203..3d5e8b0e9 100644
--- a/src/V3ParseImp.h
+++ b/src/V3ParseImp.h
@@ -316,7 +316,7 @@ public:
 public:
     // CREATORS
     V3ParseImp(AstNetlist* rootp, V3InFilter* filterp)
-	: m_sym(rootp), m_filterp(filterp) {
+	: m_filterp(filterp), m_sym(rootp) {
 	m_fileline = NULL;
 	m_rootp = rootp; m_lexerp = NULL;
 	m_inCellDefine = false;
diff --git a/src/V3ParseLex.cpp b/src/V3ParseLex.cpp
index d0a4578a9..31a6dd92e 100644
--- a/src/V3ParseLex.cpp
+++ b/src/V3ParseLex.cpp
@@ -62,7 +62,7 @@ public:
 void V3ParseImp::stateExitPsl() { parsep()->m_lexerp->stateExitPsl(); }
 void V3ParseImp::statePushVlg() { parsep()->m_lexerp->stateExitPsl(); }
 void V3ParseImp::statePop()	{ parsep()->m_lexerp->statePop(); }
-int V3ParseImp::yylexThis() {     parsep()->m_lexerp->yylex(); }
+int V3ParseImp::yylexThis() {     return parsep()->m_lexerp->yylex(); }
 
 //######################################################################
 // Read class functions
diff --git a/src/V3PreLex.l b/src/V3PreLex.l
index b739f4d93..5c3e07c26 100644
--- a/src/V3PreLex.l
+++ b/src/V3PreLex.l
@@ -538,6 +538,7 @@ void V3PreLex::unused() {
     if (0) {
 	// Prevent unused warnings
 	yy_top_state();
+	yyerror((char*)"");
     }
 }
 
diff --git a/src/verilog.l b/src/verilog.l
index be76cebe4..0df0d81a5 100644
--- a/src/verilog.l
+++ b/src/verilog.l
@@ -963,7 +963,8 @@ double V3ParseImp::parseDouble(const char* textp, size_t length) {
     *dp++ = '\0';
     char* endp = strgp;
     double d = strtod(strgp, &endp);
-    if ((endp-strgp) != length) { yyerrorf("Syntax error parsing real: %s",strgp); }
+    size_t parsed_len = endp-strgp;
+    if (parsed_len != length) { yyerrorf("Syntax error parsing real: %s",strgp); }
     delete strgp;
     return d;
 }
diff --git a/src/verilog.y b/src/verilog.y
index d36515e0a..9e176bc1c 100644
--- a/src/verilog.y
+++ b/src/verilog.y
@@ -71,7 +71,7 @@ public:
 	m_varIO = AstVarType::UNKNOWN;
 	m_varDTypep = NULL;
 	m_pinNum = -1;
-	m_instModule;
+	m_instModule = "";
 	m_instParamp = NULL;
 	m_modp = NULL;
 	m_modTypeImpNum = 0;