How to compile c++11 using make command

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Hi all,
When trying to compile the host code using <make> command in MobaXterm terminal. I got this error. I am not sure what to do to fix this error. I need help

In file included from /usr/include/c++/4.8.2/array:35:0,
                     from host/src/host.cpp:16:
    /usr/include/c++/4.8.2/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
     #error This file requires compiler and library support for the \
      ^

I need help to fix this error please .

What I have tried:

I am not sure what to do to fix this problem so far

Posted 15-Sep-21 1:17am

prother123

Updated 15-Sep-21 1:42am

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Richard MacCutchan · Answer 1 · 2021-09-15T01:42:00

Solution 1

Do what the message tells you and add the appropriate option to the Makefile entry for that source module.

Posted 15-Sep-21 1:42am

Richard MacCutchan

Comments

prother123 15-Sep-21 8:00am

thank you for reply. But I am not sure what to add to my Makefile

Richard MacCutchan 15-Sep-21 8:03am

Add the option the the CPPFLAGS macro entry in the file.

prother123 15-Sep-21 8:07am

Could you please add the proper option to my Makefile that I just attached

prother123 15-Sep-21 8:04am

This is my Makefile:

ifeq ($(VERBOSE),1)
ECHO :=
else
ECHO := @
endif

# Where is the Intel(R) FPGA SDK for OpenCL(TM) software?
ifeq ($(wildcard $(INTELFPGAOCLSDKROOT)),)
$(error Set INTELFPGAOCLSDKROOT to the root directory of the Intel(R) FPGA SDK for OpenCL(TM) software installation)
endif
ifeq ($(wildcard $(INTELFPGAOCLSDKROOT)/host/include/CL/opencl.h),)
$(error Set INTELFPGAOCLSDKROOT to the root directory of the Intel(R) FPGA SDK for OpenCL(TM) software installation.)
endif

# OpenCL compile and link flags.
AOCL_COMPILE_CONFIG := $(shell aocl compile-config )
AOCL_LINK_CONFIG := $(shell aocl link-config )

# Compilation flags
ifeq ($(DEBUG),1)
CXXFLAGS += -g
else
CXXFLAGS += -O2
endif

# Compiler
CXX := g++

# Target
TARGET := host
TARGET_DIR := bin

# Directories
INC_DIRS := ../common/inc
LIB_DIRS :=

# Files
INCS := $(wildcard )
SRCS := $(wildcard host/src/*.cpp ../common/src/AOCLUtils/*.cpp)
LIBS := rt pthread

# Make it all!
all : $(TARGET_DIR)/$(TARGET)

# Host executable target.
$(TARGET_DIR)/$(TARGET) : Makefile $(SRCS) $(INCS) $(TARGET_DIR)
$(ECHO)$(CXX) $(CPPFLAGS) $(CXXFLAGS) -fPIC $(foreach D,$(INC_DIRS),-I$D) \
$(AOCL_COMPILE_CONFIG) $(SRCS) $(AOCL_LINK_CONFIG) \
$(foreach D,$(LIB_DIRS),-L$D) \
$(foreach L,$(LIBS),-l$L) \
-o $(TARGET_DIR)/$(TARGET)

$(TARGET_DIR) :
$(ECHO)mkdir $(TARGET_DIR)

# Standard make targets
clean :
$(ECHO)rm -f $(TARGET_DIR)/$(TARGET)

.PHONY : all clean

Richard MacCutchan 15-Sep-21 9:12am

Change both entries named CXXFLAGS by adding a space followed by -std=c++11 after the existing text.

prother123 15-Sep-21 9:25am

thank you very much, this solution works for me

Richard MacCutchan 15-Sep-21 9:27am

You are welcome. I know that make files can be quite daunting to begin with, but it is yet another subject that is well worth learning.