背景
我正在尝试使用Scons创建一个基本的C++样例项目，它有两个子项目：
- Prj1是一个依赖于Prj2的EXE
- Prj2是一个导出一些函数的DLL
我遇到的问题是库在与其SConscript文件相同的目录中构建其.obj、.pdb、.lib、.dll等文件，而EXE在其SConscript所在的目录中构建其文件。应用程序成功构建了Prj2依赖项和自身。然而，您无法运行生成的EXE，因为它找不到需要的库，因为它在其他目录中。
问题
如何使具有依赖关系的多个项目将其二进制文件和调试信息输出到公共目录，以便可以执行和调试它们？
可能的解决方案
以下是我想到的：
- 我尝试使用VariantDir（以前称为BuildDir），但似乎不起作用。也许我在这里弄错了什么。
- 我可以通过Fo/Fd之类的方式明确地告诉编译器和链接器在哪里放置它们的文件（这是最好或唯一的解决方案吗？）
- 在生成的二进制文件上执行复制命令（这似乎是一种麻烦且难以维护的方法）
更新
我更新了下面的文件结构和文件内容，以反映整个可行的解决方案。感谢grieve提供的见解。
命令
使用此配置，不幸的是，您必须通过cd到构建目录然后运行下面的命令来执行构建。我需要设置一个正常工作的别名来解决这个问题。
build> scons ../bin/project1.exe
文件结构
/scons-sample
/bin
/release
/debug
/build
SConstruct
scons_helper.py
/prj1
SConscript
/include
/src
main.cpp
/prj2
SConscript
/include
functions.h
/src
functions.cpp
SConstruct
import os.path
BIN_DIR = '../bin'
OBJ_DIR = './obj'
#--------------------------------------
# CxxTest Options
#--------------------------------------
CXXTEST_DIR = '../extern/CxxTest/CxxTest-latest'
PERL = 'perl -w'
TESTS = '*.h'
TESTGEN = PERL + CXXTEST_DIR + '/cxxtestgen.pl'
CXXTESTGEN_FLAGS = '--runner=ParenPrinter \
--abort-on-fail \
--have-eh'
#--------------------------------------
# Options
#--------------------------------------
SetOption( 'implicit_cache', 1 )
# command line options
opts = Options()
opts.AddOptions(
EnumOption(
'debug',
'Debug version (useful for developers only)',
'no',
allowed_values = ('yes', 'no'),
map = { },
ignorecase = 1
)
)
#--------------------------------------
# Environment
#--------------------------------------
env = Environment(
options = opts,
#--------------------------------------
# Linker Options
#--------------------------------------
LIBPATH = [
'../extern/wxWidgets/wxWidgets-latest/lib/vc_dll'
],
LIBS = [
# 'wxmsw28d_core.lib',
# 'wxbase28d.lib',
# 'wxbase28d_odbc.lib',
# 'wxbase28d_net.lib',
'kernel32.lib',
'user32.lib',
'gdi32.lib',
'winspool.lib',
'comdlg32.lib',
'advapi32.lib',
'shell32.lib',
'ole32.lib',
'oleaut32.lib',
'uuid.lib',
'odbc32.lib',
'odbccp32.lib'
],
LINKFLAGS = '/nologo /subsystem:console /incremental:yes /debug /machine:I386',
#--------------------------------------
# Compiler Options
#--------------------------------------
CPPPATH = [
'./include/',
'../extern/wxWidgets/wxWidgets-latest/include',
'../extern/wxWidgets/wxWidgets-latest/vc_dll/mswd'
],
CPPDEFINES = [
'WIN32',
'_DEBUG',
'_CONSOLE',
'_MBCS',
'WXUSINGDLL',
'__WXDEBUG__'
],
CCFLAGS = '/W4 /EHsc /RTC1 /MDd /nologo /Zi /TP /errorReport:prompt'
)
env.Decider( 'MD5-timestamp' ) # For speed, use timestamps for change, followed by MD5
Export( 'env', 'BIN_DIR' ) # Export this environment for use by the SConscript files
#--------------------------------------
# Builders
#--------------------------------------
SConscript( '../prj1/SConscript' )
SConscript( '../prj2/SConscript' )
Default( 'prj1' )
scons_helper.py
import os.path
#--------------------------------------
# Functions
#--------------------------------------
# Prepends the full path information to the output directory so that the build
# files are dropped into the directory specified by trgt rather than in the
# same directory as the SConscript file.
#
# Parameters:
# env - The environment to assign the Program value for
# outdir - The relative path to the location you want the Program binary to be placed
# trgt - The target application name (without extension)
# srcs - The list of source files
# Ref:
# Credit grieve and his local SCons guru for this:
# https://dev59.com/BOo6XIcBkEYKwwoYTzRK
def PrefixProgram(env, outdir, trgt, srcs):
env.Program(target = os.path.join(outdir, trgt), source = srcs)
# Similar to PrefixProgram above, except for SharedLibrary
def PrefixSharedLibrary(env, outdir, trgt, srcs):
env.SharedLibrary(target = os.path.join(outdir, trgt), source = srcs)
def PrefixFilename(filename, extensions):
return [(filename + ext) for ext in extensions]
# Prefix the source files names with the source directory
def PrefixSources(srcdir, srcs):
return [os.path.join(srcdir, x) for x in srcs]
Prj1的SConscript文件
import os.path
import sys
sys.path.append( '../build' )
from scons_helper import *
Import( 'env', 'BIN_DIR' ) # Import the common environment
prj1_env = env.Clone() # Clone it so we don't make changes to the global one
#--------------------------------------
# Project Options
#--------------------------------------
PROG = 'project1'
#--------------------------------------
# Header Files
#--------------------------------------
INC_DIR = [
'../prj2/include'
]
HEADERS = [
''
]
#--------------------------------------
# Source Files
#--------------------------------------
SRC_DIR = './src'
SOURCES = [
'main.cpp'
]
# Prefix the source files names with the source directory
SOURCES = PrefixSources( SRC_DIR, SOURCES )
#--------------------------------------
# Compiler and Linker Overrides
#--------------------------------------
prj1_env.Append(
CPPPATH = INC_DIR,
LIBS = 'project2',
LIBPATH = BIN_DIR,
# Microsoft Visual Studio Specific
PDB = os.path.join( BIN_DIR, PROG + '.pdb' )
)
#--------------------------------------
# Builders
#--------------------------------------
PrefixProgram( prj1_env, BIN_DIR, PROG, SOURCES )
Prj2的SConscript文件
import os.path
import sys
sys.path.append( '../build' )
from scons_helper import *
Import( 'env', 'BIN_DIR' ) # Import the common environment
prj2_env = env.Clone() # Clone it so we don't make changes to the global one
#--------------------------------------
# Project Options
#--------------------------------------
PROG = 'project2'
#--------------------------------------
# Header Files
#--------------------------------------
INC_DIR = [
''
]
HEADERS = [
'functions.h'
]
#--------------------------------------
# Source Files
#--------------------------------------
SRC_DIR = './src/'
SOURCES = [
'functions.cpp'
]
# Prefix the source files names with the source directory
SOURCES = PrefixSources( SRC_DIR, SOURCES )
#--------------------------------------
# Compiler and Linker Overrides
#--------------------------------------
# Update the environment with the project specific information
prj2_env.Append(
CPPPATH = INC_DIR,
# Microsoft Visual Studio Specific
PDB = os.path.join( BIN_DIR, PROG + '.pdb' )
)
#--------------------------------------
# Builders
#--------------------------------------
PrefixSharedLibrary( prj2_env, BIN_DIR, PROG, SOURCES )