是scons不支持LDFLAGS吗？

Question

我是个新手。我正在尝试建立一个程序与gRPC的scons。我使用grpc_lib = commands.getoutput('pkg-config --libs protobuf grpc++')来获取LDFLAGS。grpc_lib是一个字符串

-L/home/zty/.local/lib -lprotobuf -lpthread -lgrpc++ -labsl_raw_hash_set -labsl_hashtablez_sampler -labsl_exponential_biased -labsl_hash -labsl_bad_variant_access -labsl_city -labsl_status -labsl_cord -labsl_bad_optional_access -labsl_str_format_internal -labsl_synchronization -labsl_graphcycles_internal -labsl_symbolize -labsl_demangle_internal -labsl_stacktrace -labsl_debugging_internal -labsl_malloc_internal -labsl_time -labsl_time_zone -labsl_civil_time -labsl_strings -labsl_strings_internal -labsl_throw_delegate -labsl_int128 -labsl_base -labsl_spinlock_wait -labsl_raw_logging_internal -labsl_log_severity -labsl_dynamic_annotations -lgrpc -laddress_sorting -lre2 -lupb -lcares -lz -labsl_raw_hash_set -labsl_hashtablez_sampler -labsl_exponential_biased -labsl_hash -labsl_bad_variant_access -labsl_city -labsl_status -labsl_cord -labsl_bad_optional_access -labsl_str_format_internal -labsl_synchronization -labsl_graphcycles_internal -labsl_symbolize -labsl_demangle_internal -labsl_stacktrace -labsl_debugging_internal -labsl_malloc_internal -labsl_time -labsl_time_zone -labsl_civil_time -labsl_strings -labsl_strings_internal -labsl_throw_delegate -labsl_int128 -labsl_base -labsl_spinlock_wait -labsl_raw_logging_internal -labsl_log_severity -labsl_dynamic_annotations -lgpr -labsl_str_format_internal -labsl_synchronization -labsl_graphcycles_internal -labsl_symbolize -labsl_demangle_internal -labsl_stacktrace -labsl_debugging_internal -labsl_malloc_internal -labsl_time -labsl_time_zone -labsl_civil_time -labsl_strings -labsl_strings_internal -labsl_throw_delegate -labsl_int128 -labsl_base -labsl_spinlock_wait -labsl_raw_logging_internal -labsl_log_severity -labsl_dynamic_annotations -lssl -lcrypto

所以我的SConstruct在下面，但它没有链接到LDFLAGS。

import os
import commands
from SCons.Script import *
grpc_lib = commands.getoutput('pkg-config --libs protobuf grpc++')
grpc_cflags = commands.getoutput('pkg-config --cflags protobuf grpc')

mainEnv = Environment(ENV = os.environ)

mainEnv['CXX'] = 'g++'
mainEnv.Append(CXXFLAGS = '-std=c++11')
mainEnv.Append(CPPPATH = '../protos')
mainEnv.Append(CPPFLAGS = grpc_cflags)
mainEnv.Append(LDFLAGS = grpc_lib)

sources = Split("""
                ../protos/CSmalloc.grpc.pb.cc
                ../protos/CSmalloc.pb.cc
                server.cc
                """)
mainEnv.Program('server',sources)

输出

g++ -o /home/zty/lsnvmm-pmalloc/examples/grpc-CS/protos/CSmalloc.grpc.pb.o -c -std=c++11 -lpthread -I/home/zty/.local/include -I/home/zty/lsnvmm-pmalloc/examples/grpc-CS/protos /home/zty/lsnvmm-pmalloc/examples/grpc-CS/protos/CSmalloc.grpc.pb.cc
g++ -o /home/zty/lsnvmm-pmalloc/examples/grpc-CS/protos/CSmalloc.pb.o -c -std=c++11 -lpthread -I/home/zty/.local/include -I/home/zty/lsnvmm-pmalloc/examples/grpc-CS/protos /home/zty/lsnvmm-pmalloc/examples/grpc-CS/protos/CSmalloc.pb.cc
g++ -o server.o -c -std=c++11 -lpthread -I/home/zty/.local/include -I/home/zty/lsnvmm-pmalloc/examples/grpc-CS/protos server.cc
g++ -o server /home/zty/lsnvmm-pmalloc/examples/grpc-CS/protos/CSmalloc.grpc.pb.o /home/zty/lsnvmm-pmalloc/examples/grpc-CS/protos/CSmalloc.pb.o server.o

顺便问一下，有没有更简单的用gRPC构建C++程序的方法？

Answer 1

如果使用mainEnv.ParseConfig会更容易，它可以将运行pkg-config的结果直接拆分到正确的构造变量中。

至于gRPC...至少在互联网上有一些关于在scons中流畅地使用协议缓冲区的实验工作。这就是其中之一，不确定它是否是“最好的”版本：https://github.com/SCons/scons/wiki/ProtocBuilder。你可能需要更多..。你可以加入scons Discord频道进一步聊天。编辑:我没有意识到页面指向的存储库在Bitbucket删除非git存储库时被关闭的集合中，但它是存档的，而不是丢失的。