数学関数がC言語の "make"で動作しない

Question

以前に開発したコードを編集しようとしています。私は正常にそれを編集し、 'cmake'と 'make'で構築することができます。私が実行している問題は、 "atan"関数を使用していることです。私はこの変更で「make」を実行しようとすると、私はコマンドラインで次のエラーを取得する：

[ 5%] Built target convenience_static 
[ 35%] Built target rtlsdr_shared 
[ 40%] Built target rtl_adsb 
[ 45%] Built target rtl_eeprom 
[ 50%] Built target rtl_fm 
[ 55%] Built target rtl_power 
Linking C executable rtl_sdr 
CMakeFiles/rtl_sdr.dir/rtl_sdr.c.o: In function `main': 
rtl_sdr.c:(.text.startup+0x2ce): undefined reference to `atanf' 
collect2: error: ld returned 1 exit status 
make[2]: *** [src/rtl_sdr] Error 1 
make[1]: *** [src/CMakeFiles/rtl_sdr.dir/all] Error 2 
make: *** [all] Error 2 

rtl_sdr.cは、私が編集していたファイルです。私は含まれており、これはまだ起こっている。私がまともであることを確かめるために、私は 'atan'を含むテストCプログラムを作成し、 'gcc'を使ってコンパイルしました。だから、私はCMakeやMakeファイルがgccを使っていないと推測していますが、わかりません。私は基本的にmakeやcmakeについて何も知らない。

何か助けていただければ幸いです。以下は

私CMakeFileです：あなたのCMakeLists.txt

でビルドターゲット用target_link_librariesへのlibmを追加

# Copyright 2012 OSMOCOM Project 
# 
# This file is part of rtl-sdr 
# 
# GNU Radio is free software; you can redistribute it and/or modify 
# it under the terms of the GNU General Public License as published by 
# the Free Software Foundation; either version 3, or (at your option) 
# any later version. 
# 
# GNU Radio is distributed in the hope that it will be useful, 
# but WITHOUT ANY WARRANTY; without even the implied warranty of 
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
# GNU General Public License for more details. 
# 
# You should have received a copy of the GNU General Public License 
# along with GNU Radio; see the file COPYING. If not, write to 
# the Free Software Foundation, Inc., 51 Franklin Street, 
# Boston, MA 02110-1301, USA. 


######################################################################## 
# Project setup 
######################################################################## cmake_minimum_required(VERSION 2.6) project(rtlsdr C) 

#select the release build type by default to get optimization flags if(NOT CMAKE_BUILD_TYPE) set(CMAKE_BUILD_TYPE "Release") message(STATUS "Build type not specified: defaulting to release.") endif(NOT CMAKE_BUILD_TYPE) set(CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE} CACHE STRING "") 

list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules) 

if(NOT LIB_INSTALL_DIR) set(LIB_INSTALL_DIR lib) endif() 

# Set the version information here set(VERSION_INFO_MAJOR_VERSION 0) # increment major on api compatibility changes set(VERSION_INFO_MINOR_VERSION 5) # increment minor on feature-level changes set(VERSION_INFO_PATCH_VERSION git) # increment patch for bug fixes and docs include(Version) # setup version info 

######################################################################## 
# Compiler specific setup 
######################################################################## if(CMAKE_COMPILER_IS_GNUCC AND NOT WIN32) 
    ADD_DEFINITIONS(-Wall) 
    ADD_DEFINITIONS(-Wextra) 
    ADD_DEFINITIONS(-Wno-unused-parameter) 
    ADD_DEFINITIONS(-Wno-unused) 
    ADD_DEFINITIONS(-Wsign-compare) 
    ADD_DEFINITIONS(-Wdeclaration-after-statement) 
    #http://gcc.gnu.org/wiki/Visibility 
    add_definitions(-fvisibility=hidden) endif() 

######################################################################## 
# Find build dependencies 
######################################################################## find_package(PkgConfig) find_package(LibUSB) set(THREADS_USE_PTHREADS_WIN32 true) find_package(Threads) 

if(NOT LIBUSB_FOUND) 
    message(FATAL_ERROR "LibUSB 1.0 required to compile rtl-sdr") endif() if(NOT THREADS_FOUND) 
    message(FATAL_ERROR "pthreads(-win32) required to compile rtl-sdr") endif() 
######################################################################## 
# Setup the include and linker paths 
######################################################################## include_directories(
    ${CMAKE_SOURCE_DIR}/include 
    ${LIBUSB_INCLUDE_DIR} 
    ${THREADS_PTHREADS_INCLUDE_DIR}) 

#link_directories(
# ... 
#) 

# Set component parameters 
#set(INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/include CACHE INTERNAL "" FORCE) 

######################################################################## 
# Create uninstall target 
######################################################################## configure_file(
    ${CMAKE_SOURCE_DIR}/cmake/cmake_uninstall.cmake.in 
    ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake @ONLY) 

add_custom_target(uninstall 
    ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake) 

######################################################################## 
# Install udev rules 
######################################################################## option(INSTALL_UDEV_RULES "Install udev rules for RTL-SDR" OFF) if (INSTALL_UDEV_RULES) 
    install (
     FILES rtl-sdr.rules 
     DESTINATION "/etc/udev/rules.d" 
     COMPONENT "udev" 
     ) else (INSTALL_UDEV_RULES) 
    message (STATUS "Udev rules not being installed, install them with -DINSTALL_UDEV_RULES=ON") endif (INSTALL_UDEV_RULES) 

option(DETACH_KERNEL_DRIVER "Detach kernel driver if loaded" OFF) if (DETACH_KERNEL_DRIVER) 
    message (STATUS "Building with kernel driver detaching enabled") 
    add_definitions(-DDETACH_KERNEL_DRIVER=1) else (DETACH_KERNEL_DRIVER) 
    message (STATUS "Building with kernel driver detaching disabled, use -DDETACH_KERNEL_DRIVER=ON to enable") endif (DETACH_KERNEL_DRIVER) 

######################################################################## 
# Add subdirectories 
######################################################################## add_subdirectory(include) add_subdirectory(src) 

######################################################################## 
# Create Pkg Config File 
######################################################################## FOREACH(inc ${LIBUSB_INCLUDE_DIR}) 
    LIST(APPEND RTLSDR_PC_CFLAGS "-I${inc}") ENDFOREACH(inc) 

FOREACH(lib ${LIBUSB_LIBRARY_DIRS}) 
    LIST(APPEND RTLSDR_PC_LIBS "-L${lib}") ENDFOREACH(lib) 

# use space-separation format for the pc file STRING(REPLACE ";" " " RTLSDR_PC_CFLAGS "${RTLSDR_PC_CFLAGS}") STRING(REPLACE ";" " " RTLSDR_PC_LIBS "${RTLSDR_PC_LIBS}") 

# unset these vars to avoid hard-coded paths to cross environment IF(CMAKE_CROSSCOMPILING) 
    UNSET(RTLSDR_PC_CFLAGS) 
    UNSET(RTLSDR_PC_LIBS) ENDIF(CMAKE_CROSSCOMPILING) 

set(prefix ${CMAKE_INSTALL_PREFIX}) set(exec_prefix \${prefix}) set(libdir \${exec_prefix}/${LIB_INSTALL_DIR}) set(includedir \${prefix}/include) 

CONFIGURE_FILE(
    ${CMAKE_CURRENT_SOURCE_DIR}/librtlsdr.pc.in 
    ${CMAKE_CURRENT_BINARY_DIR}/librtlsdr.pc @ONLY) 

INSTALL(
    FILES ${CMAKE_CURRENT_BINARY_DIR}/librtlsdr.pc 
    DESTINATION ${LIB_INSTALL_DIR}/pkgconfig) 

######################################################################## 
# Print Summary 
######################################################################## MESSAGE(STATUS "Building for version: ${VERSION}/${LIBVER}") MESSAGE(STATUS "Using install prefix: ${CMAKE_INSTALL_PREFIX}") 

Answer 1

てみたとえばあなたが

add_executable (test test.c) 
target_link_libraries (test m)