Problems with cygwin build dll for use in windows app
I use Cygwin to build source code to DLL used by windows app.
When I use GCC core / GCC g++, the app crash if it calls function (which includes printf or malloc) in DLL.
When I use Mingw64-x86_64-gcc-core / Mingw64-x86_64-gcc-g++ it reports error like sys/socket.h：No such file or directory.
Can anyone explain how to do it? Thanks.
dll cygwin
edited Nov 16 '18 at 6:05
kit
1,1063917
asked Nov 16 '18 at 5:00
Wang HaiWang Hai
58116
add a comment |
I use Cygwin to build source code to DLL used by windows app.
When I use GCC core / GCC g++, the app crash if it calls function (which includes printf or malloc) in DLL.
When I use Mingw64-x86_64-gcc-core / Mingw64-x86_64-gcc-g++ it reports error like sys/socket.h：No such file or directory.
Can anyone explain how to do it? Thanks.
dll cygwin
edited Nov 16 '18 at 6:05
kit
1,1063917
asked Nov 16 '18 at 5:00
Wang HaiWang Hai
58116
add a comment |
I use Cygwin to build source code to DLL used by windows app.
When I use GCC core / GCC g++, the app crash if it calls function (which includes printf or malloc) in DLL.
When I use Mingw64-x86_64-gcc-core / Mingw64-x86_64-gcc-g++ it reports error like sys/socket.h：No such file or directory.
Can anyone explain how to do it? Thanks.
dll cygwin
edited Nov 16 '18 at 6:05
kit
1,1063917
asked Nov 16 '18 at 5:00
Wang HaiWang Hai
58116
I use Cygwin to build source code to DLL used by windows app.
When I use GCC core / GCC g++, the app crash if it calls function (which includes printf or malloc) in DLL.
When I use Mingw64-x86_64-gcc-core / Mingw64-x86_64-gcc-g++ it reports error like sys/socket.h：No such file or directory.
Can anyone explain how to do it? Thanks.
dll cygwin
dll cygwin
edited Nov 16 '18 at 6:05
kit
1,1063917
asked Nov 16 '18 at 5:00
Wang HaiWang Hai
58116
edited Nov 16 '18 at 6:05
kit
1,1063917
asked Nov 16 '18 at 5:00
Wang HaiWang Hai
58116
edited Nov 16 '18 at 6:05
kit
1,1063917
edited Nov 16 '18 at 6:05
kit
1,1063917
edited Nov 16 '18 at 6:05
kit
1,1063917
1,1063917
asked Nov 16 '18 at 5:00
Wang HaiWang Hai
58116
asked Nov 16 '18 at 5:00
Wang HaiWang Hai
58116
asked Nov 16 '18 at 5:00
Wang HaiWang Hai
58116
58116
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
The first problem is due to the tentative to build a stand alone DLL (not depending on cygwin1.dll) using cygwin only specific tools.
You have collision between multiple malloc and other C library call present in cygwin1.dll.
The second is due to the fact that sys/socket.h does not exist on Windows
see for possible solution:
Using sys/socket.h functions on windows
So you need to define what is your target : Cygwin/Posix or Windows and choose programming style and tools accordingly, you can not mix.
answered Nov 16 '18 at 17:10
matzerimatzeri
4,132268
Hi, for the first problem, I build a DLL (depends on cygwin1.dll), and create a windows console app with Visual Studio to load the DLL, and call a function in it. If the function contains malloc, the app crashes. So Why there are multiple malloc? Thanks.
– Wang Hai
Nov 17 '18 at 6:08
Visual Studio program uses the Windows C malloc, the Cygwin DLL uses the one in cygwin1.dll. You need to use the same tools for both app and dll
– matzeri
Nov 17 '18 at 6:53
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The first problem is due to the tentative to build a stand alone DLL (not depending on cygwin1.dll) using cygwin only specific tools.
You have collision between multiple malloc and other C library call present in cygwin1.dll.
The second is due to the fact that sys/socket.h does not exist on Windows
see for possible solution:
Using sys/socket.h functions on windows
So you need to define what is your target : Cygwin/Posix or Windows and choose programming style and tools accordingly, you can not mix.
answered Nov 16 '18 at 17:10
matzerimatzeri
4,132268
Hi, for the first problem, I build a DLL (depends on cygwin1.dll), and create a windows console app with Visual Studio to load the DLL, and call a function in it. If the function contains malloc, the app crashes. So Why there are multiple malloc? Thanks.
– Wang Hai
Nov 17 '18 at 6:08
Visual Studio program uses the Windows C malloc, the Cygwin DLL uses the one in cygwin1.dll. You need to use the same tools for both app and dll
– matzeri
Nov 17 '18 at 6:53
add a comment |
The first problem is due to the tentative to build a stand alone DLL (not depending on cygwin1.dll) using cygwin only specific tools.
You have collision between multiple malloc and other C library call present in cygwin1.dll.
The second is due to the fact that sys/socket.h does not exist on Windows
see for possible solution:
Using sys/socket.h functions on windows
So you need to define what is your target : Cygwin/Posix or Windows and choose programming style and tools accordingly, you can not mix.
answered Nov 16 '18 at 17:10
matzerimatzeri
4,132268
Hi, for the first problem, I build a DLL (depends on cygwin1.dll), and create a windows console app with Visual Studio to load the DLL, and call a function in it. If the function contains malloc, the app crashes. So Why there are multiple malloc? Thanks.
– Wang Hai
Nov 17 '18 at 6:08
Visual Studio program uses the Windows C malloc, the Cygwin DLL uses the one in cygwin1.dll. You need to use the same tools for both app and dll
– matzeri
Nov 17 '18 at 6:53
add a comment |
The first problem is due to the tentative to build a stand alone DLL (not depending on cygwin1.dll) using cygwin only specific tools.
You have collision between multiple malloc and other C library call present in cygwin1.dll.
The second is due to the fact that sys/socket.h does not exist on Windows
see for possible solution:
Using sys/socket.h functions on windows
So you need to define what is your target : Cygwin/Posix or Windows and choose programming style and tools accordingly, you can not mix.
answered Nov 16 '18 at 17:10
matzerimatzeri
4,132268
The first problem is due to the tentative to build a stand alone DLL (not depending on cygwin1.dll) using cygwin only specific tools.
You have collision between multiple malloc and other C library call present in cygwin1.dll.
The second is due to the fact that sys/socket.h does not exist on Windows
see for possible solution:
Using sys/socket.h functions on windows
So you need to define what is your target : Cygwin/Posix or Windows and choose programming style and tools accordingly, you can not mix.
answered Nov 16 '18 at 17:10
matzerimatzeri
4,132268
answered Nov 16 '18 at 17:10
matzerimatzeri
4,132268
answered Nov 16 '18 at 17:10
matzerimatzeri
4,132268
answered Nov 16 '18 at 17:10
matzerimatzeri
4,132268
4,132268
Hi, for the first problem, I build a DLL (depends on cygwin1.dll), and create a windows console app with Visual Studio to load the DLL, and call a function in it. If the function contains malloc, the app crashes. So Why there are multiple malloc? Thanks.
– Wang Hai
Nov 17 '18 at 6:08
Visual Studio program uses the Windows C malloc, the Cygwin DLL uses the one in cygwin1.dll. You need to use the same tools for both app and dll
– matzeri
Nov 17 '18 at 6:53
add a comment |
Hi, for the first problem, I build a DLL (depends on cygwin1.dll), and create a windows console app with Visual Studio to load the DLL, and call a function in it. If the function contains malloc, the app crashes. So Why there are multiple malloc? Thanks.
– Wang Hai
Nov 17 '18 at 6:08
Visual Studio program uses the Windows C malloc, the Cygwin DLL uses the one in cygwin1.dll. You need to use the same tools for both app and dll
– matzeri
Nov 17 '18 at 6:53
Hi, for the first problem, I build a DLL (depends on cygwin1.dll), and create a windows console app with Visual Studio to load the DLL, and call a function in it. If the function contains malloc, the app crashes. So Why there are multiple malloc? Thanks.
– Wang Hai
Nov 17 '18 at 6:08
Hi, for the first problem, I build a DLL (depends on cygwin1.dll), and create a windows console app with Visual Studio to load the DLL, and call a function in it. If the function contains malloc, the app crashes. So Why there are multiple malloc? Thanks.
– Wang Hai
Nov 17 '18 at 6:08
Visual Studio program uses the Windows C malloc, the Cygwin DLL uses the one in cygwin1.dll. You need to use the same tools for both app and dll
– matzeri
Nov 17 '18 at 6:53
Visual Studio program uses the Windows C malloc, the Cygwin DLL uses the one in cygwin1.dll. You need to use the same tools for both app and dll
– matzeri
Nov 17 '18 at 6:53
add a comment |
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