当我尝试在 MSYS2 中构建 cpprestsdk ( https://github.com/Microsoft/cpprestsdk ) 时，我得到一个很长的错误列表。这里是我的环境：
- 视窗 10
- 带有 i686-w64-mingw32 工具链的 MSYS2
- GCC 6.3.0
- 制作 4.2.1
- cmake 3.8.0
制作
$ cmake -G "MSYS Makefiles" .. -DCMAKE_BUILD_TYPE=Release
-- The C compiler identification is GNU 6.3.0
-- The CXX compiler identification is GNU 6.3.0
-- Check for working C compiler: C:/dev/msys32/mingw32/bin/gcc.exe
-- Check for working C compiler: C:/dev/msys32/mingw32/bin/gcc.exe -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: C:/dev/msys32/mingw32/bin/g++.exe
-- Check for working CXX compiler: C:/dev/msys32/mingw32/bin/g++.exe -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - found
-- Found Threads: TRUE
-- Setting gcc options
-- websocketpp not found, using the embedded version
-- Boost version: 1.63.0
-- Found the following Boost libraries:
-- system
-- date_time
-- regex
-- Found OpenSSL: C:/dev/msys32/mingw32/lib/libssl.dll.a (found suitable version "1.0.2k", minimum required is "1.0.0")
-- Performing Test _SSL_LEAK_SUPPRESS_AVAILABLE
-- Performing Test _SSL_LEAK_SUPPRESS_AVAILABLE - Success
-- Found ZLIB: C:/dev/msys32/mingw32/lib/libz.dll.a (found version "1.2.11")
-- Added test library httpclient_test
-- Added test library httplistener_test
-- Added test library json_test
-- Added test library pplx_test
-- Added test library streams_test
-- Added test library uri_test
-- Added test library utils_test
-- Added test library websocketclient_test
-- Configuring done
-- Generating done
-- Build files have been written to: C:/cpprestsdk/Release/build.release
这里似乎一切正常。
制作
$ make
Scanning dependencies of target cpprest
[ 0%] Building CXX object src/CMakeFiles/cpprest.dir/http/client/http_client.cpp.obj
In file included from C:/cpprestsdk/Release/src/http/client/http_client.cpp:16:0:
C:/cpprestsdk/Release/src/pch/stdafx.h:43:0: error: "NOMINMAX" redefined [-Werror]
#define NOMINMAX
In file included from C:/dev/msys32/mingw32/include/c++/6.3.0/i686-w64-mingw32/bits/c++config.h:507:0,
from C:/dev/msys32/mingw32/include/c++/6.3.0/string:38,
from C:/cpprestsdk/Release/include/cpprest/details/basic_types.h:16,
from C:/cpprestsdk/Release/src/pch/stdafx.h:23,
from C:/cpprestsdk/Release/src/http/client/http_client.cpp:16:
C:/dev/msys32/mingw32/include/c++/6.3.0/i686-w64-mingw32/bits/os_defines.h:45:0: note: this is the location of the previous definition
#define NOMINMAX 1
In file included from C:/cpprestsdk/Release/src/pch/stdafx.h:104:0,
from C:/cpprestsdk/Release/src/http/client/http_client.cpp:16:
C:/cpprestsdk/Release/include/cpprest/interopstream.h:20:0: error: ignoring #pragma warning [-Werror=unknown-pragmas]
#pragma warning(push)
C:/cpprestsdk/Release/include/cpprest/interopstream.h:21:0: error: ignoring #pragma warning [-Werror=unknown-pragmas]
#pragma warning(disable : 4250)
In file included from C:/cpprestsdk/Release/src/pch/stdafx.h:104:0,
from C:/cpprestsdk/Release/src/http/client/http_client.cpp:16:
C:/cpprestsdk/Release/include/cpprest/interopstream.h:523:0: error: ignoring #pragma warning [-Werror=unknown-pragmas]
#pragma warning(pop)
In file included from C:/cpprestsdk/Release/src/pch/stdafx.h:143:0,
from C:/cpprestsdk/Release/src/http/client/http_client.cpp:16:
C:/cpprestsdk/Release/include/cpprest/details/http_server_httpsys.h:19:0: error: ignoring #pragma warning [-Werror=unknown-pragmas]
#pragma warning(push)
C:/cpprestsdk/Release/include/cpprest/details/http_server_httpsys.h:20:0: error: ignoring #pragma warning [-Werror=unknown-pragmas]
#pragma warning(disable : 6386)
In file included from C:/cpprestsdk/Release/src/pch/stdafx.h:143:0,
from C:/cpprestsdk/Release/src/http/client/http_client.cpp:16:
C:/cpprestsdk/Release/include/cpprest/details/http_server_httpsys.h:22:0: error: ignoring #pragma warning [-Werror=unknown-pragmas]
#pragma warning(pop)
In file included from C:/cpprestsdk/Release/include/pplx/pplxwin.h:19:0,
from C:/cpprestsdk/Release/include/pplx/pplx.h:43,
from C:/cpprestsdk/Release/include/pplx/pplxtasks.h:42,
from C:/cpprestsdk/Release/src/pch/stdafx.h:97,
from C:/cpprestsdk/Release/src/http/client/http_client.cpp:16:
C:/cpprestsdk/Release/include/pplx/pplxinterface.h:52:29: error: 'novtable' attribute directive ignored [-Werror=attributes]
struct __declspec(novtable) scheduler_interface
^~~~~~~~~~~~~~~~~~~
In file included from C:/cpprestsdk/Release/include/pplx/pplx.h:43:0,
from C:/cpprestsdk/Release/include/pplx/pplxtasks.h:42,
from C:/cpprestsdk/Release/src/pch/stdafx.h:97,
from C:/cpprestsdk/Release/src/http/client/http_client.cpp:16:
C:/cpprestsdk/Release/include/pplx/pplxwin.h:175:14: error: extra qualification 'pplx::details::recursive_lock_impl::' on member 'lock' [-fpermissive]
void recursive_lock_impl::lock()
^~~~~~~~~~~~~~~~~~~
C:/cpprestsdk/Release/include/pplx/pplxwin.h:191:14: error: extra qualification 'pplx::details::recursive_lock_impl::' on member 'unlock' [-fpermissive]
void recursive_lock_impl::unlock()
^~~~~~~~~~~~~~~~~~~
C:/cpprestsdk/Release/include/pplx/pplxwin.h: In constructor 'pplx::details::recursive_lock_impl::recursive_lock_impl()':
C:/cpprestsdk/Release/include/pplx/pplxwin.h:208:23: error: 'pplx::details::recursive_lock_impl::_M_owner' will be initialized after [-Werror=reorder]
volatile long _M_owner;
...
输出很长。这些只是第一个错误。这里发生了什么事？