Makefile G ++ LRT问题.找不到LRT [英] Makefile g++ lrt problem. Cannot find lrt

问题描述

这是我的makefile.

Here is my makefile.

# The intuitive "all" target will be our default.
.DEFAULT_GOAL := all

# Component dir's to search and invoke make.
# (Try preserving the order of directories)
COM := src_dir1 src_dir2 src_dir3 
PROJ_DIR = $(shell pwd)

EXEC := anonymousforconfidentiality
CC := g++
CFLAGS := -g3

LIBS = `pkg-config --cflags --libs glib-2.0 gio-unix-2.0 bluez protobuf lrt`


.PHONY : clean compile link all

all: | clean compile link

link: 
        $(eval $@_ALLOBJECTS := $(shell find . -name '*.o'))
        $(CC) $(CFLAGS) -o $(EXEC) $($@_ALLOBJECTS) $(LIBS)

compile:
    for COMDIR in $(COM) ; do \
    $(MAKE) INCLUDE_PATH=$(PROJ_DIR) -C $$COMDIR ; \
    done

clean:
    for COMDIR in $(COM) ; do \
    rm -f $$COMDIR/bin/*.o ; \
    done

    rm -f $(EXEC)

我无法链接库'lrt'.我大量使用了POSIX实时功能，例如mq_open()，mq_send()，mq_receive()等...因此，必须将其链接.

I am not able to link the library 'lrt'. I make extensive use of POSIX real time such as mq_open(), mq_send(), mq_receive() etc... So it is imperative I link it.

我尝试过的一些变化: 1.诽谤 2. LRT 3. rt 4. librt-dev

Some of the variations I tried: 1. librt 2. lrt 3. rt 4. librt-dev

但是我总是会收到此错误:

However I always get this error:

Package lrt was not found in the pkg-config search path.
Perhaps you should add the directory containing `lrt.pc'
to the PKG_CONFIG_PATH environment variable
No package 'lrt' found

我什至尝试手动安装"librt"，但找不到该软件包. apt-get也找不到它.

I even tried to manually install "librt" but was unsuccessful in locating the package. Nor did apt-get find it.

我以为这个库已经预装了Ubuntu普通内核(没有实时补丁).需要解决此问题的帮助.

I was assuming this lib comes prepackaged with Ubuntu normal kernel (no real time patch). Need help with resolution of this issue.

推荐答案

您可能想要链接rt库.这是通过-lrt完成的.无需使用pkg-config.

You probably want to link rt library. This is done with -lrt. No need to use pkg-config for it.

例如:

LIBS := `pkg-config --libs glib-2.0 gio-unix-2.0 bluez protobuf` -lrt

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