Drop support for gcc before 4.8

Makefile

@@ -14,11 +14,6 @@ LIBPATHS = $(addprefix -L, $(LIBS))
 SRCEXTS = .c .cc .cpp .proto
 HDREXTS = .h .hpp
 
-# strict-aliasing in gcc4.4 in buggy
-ifeq ($(shell echo $$(($(GCC_VERSION)/ 100))), 404)
-	CXXFLAGS+=-Wno-strict-aliasing
-	CFLAGS+=-Wno-strict-aliasing
-endif
 #required by base/crc32.cc to boost performance for 10x
 ifeq ($(shell test $(GCC_VERSION) -ge 40400; echo $$?),0)
 	CXXFLAGS+=-msse4 -msse4.2

README

@@ -28,10 +28,10 @@ git clone this repo. cd into the repo and run: sh config_brpc.sh --headers=../..
 download deps: third-64/tcmalloc@tcmalloc_1-7-0-200_PD_BL  
 Rerun config_brpc.sh  
 
-# Supported toolchains:
-GCC: 3.4-7.1  
+# Supported deps:
+GCC: 4.8-7.1  
 glibc: 2.12-2.25  
 protobuf: 2.4-3.2  
 gflags: 2.0-2.21  
-openssl: 0.98-1.1  
+openssl: 0.97-1.1  
 tcmalloc: 1.7-2.5  

config_brpc.sh

@@ -13,8 +13,6 @@ if [ $? != 0 ] ; then >&2 $ECHO "Terminating..."; exit 1 ; fi
 eval set -- "$TEMP"
 
 # Convert to abspath always so that generated mk is include-able from everywhere
-CC=gcc
-CXX=g++
 while true; do
     case "$1" in
         --headers ) HDRS_IN="$(readlink -f $2)"; shift 2 ;;
@@ -25,8 +23,23 @@ while true; do
         * ) break ;;
     esac
 done
+if [ -z "$CC" ]; then
+    if [ ! -z "$CXX" ]; then
+        >&2 $ECHO "--cc and --cxx must be both set or unset"
+        exit 1
+    fi
+    CC=gcc
+    CXX=g++
+elif [ -z "$CXX" ]; then
+    >&2 $ECHO "--cc and --cxx must be both set or unset"
+    exit 1
+fi
 
 GCC_VERSION=$($CXX tools/print_gcc_version.cc -o print_gcc_version && ./print_gcc_version && rm ./print_gcc_version)
+if [ $GCC_VERSION -gt 0 ] && [ $GCC_VERSION -lt 40800 ]; then
+    >&2 $ECHO "GCC is too old, please install a newer version supporting C++11"
+    exit 1
+fi
 
 if [ -z "$HDRS_IN" ] || [ -z "$LIBS_IN" ]; then
     >&2 $ECHO "config_brpc: --headers=HDRPATHS --libs=LIBPATHS must be specified"

test/Makefile

@@ -7,11 +7,6 @@ CPPFLAGS+=-DUNIT_TEST -Dprivate=public -Dprotected=public -DBVAR_NOT_LINK_DEFAUL
 CXXFLAGS=$(CPPFLAGS) -g -pipe -Wall -W -fPIC -fstrict-aliasing -Wno-invalid-offsetof -Wno-unused-parameter -fno-omit-frame-pointer -std=c++0x
 CFLAGS=$(CPPFLAGS) -g -pipe -Wall -W -fPIC -fstrict-aliasing -Wno-unused-parameter -fno-omit-frame-pointer
 
-# strict-aliasing in gcc4.4 in buggy
-ifeq ($(shell echo $$(($(GCC_VERSION)/ 100))), 404)
-	CXXFLAGS+=-Wno-strict-aliasing
-	CFLAGS+=-Wno-strict-aliasing
-endif
 #required by base/crc32.cc to boost performance for 10x
 ifeq ($(shell test $(GCC_VERSION) -ge 40400; echo $$?),0)
 	CXXFLAGS+=-msse4 -msse4.2