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Re: GCC 7.2 build bugs on Windows 8.1 and Windows 10
On 2017/10/24 23:55, Jonathan Wakely wrote:
On 23 October 2017 at 15:55, David Gressett wrote:
gcc needs some substantial patching to to build on Windows.
The details depend on whether you are building a 64-bit or a 32-bit gcc.
There are two projects on Sourceforge which deal with gcc on Windows:
MinGW (32-bit) and MinGW-w64 (64-bit)
The mailing lists for those projects are the best places to go to for information about
building on Windows for a Windows target.
Did you ever get to the bottom of the problem in
https://gcc.gnu.org/ml/gcc-help/2017-04/msg00133.html ?
I see _aligned_malloc in MinGW's <malloc.h> so if the configure script
found it then I don't understand how it can be missing later.
If that code still doesn't build we need a bug report.
The attached program would not compile if the first line were
uncommented, which looks like a bug to me.
```
// #include <intrin.h>
#include <malloc.h>
#include <stdio.h>
int main(void){
void *ptr;
ptr = _aligned_malloc(1000, 32);
printf("ptr = %p\n", ptr);
_aligned_free(ptr);
}
```
```
E:\Desktop>gcc -Wall -Wextra -pedantic -pedantic-errors -std=c99 test.c
test.c: In function 'main':
test.c:8:8: error: implicit declaration of function '_aligned_malloc';
did you mean '_aligned_realloc'? [-Wimplicit-function-declaration]
ptr = _aligned_malloc(1000, 32);
^~~~~~~~~~~~~~~
_aligned_realloc
test.c:8:6: error: assignment makes pointer from integer without a cast
[-Wint-conversion]
ptr = _aligned_malloc(1000, 32);
^
test.c:10:2: error: implicit declaration of function '_aligned_free';
did you mean '_aligned_realloc'? [-Wimplicit-function-declaration]
_aligned_free(ptr);
^~~~~~~~~~~~~
_aligned_realloc
E:\Desktop>pacman -Qs -- -headers-git
local/mingw-w64-i686-headers-git 5.0.0.4971.4f97ba8e-1
(mingw-w64-i686-toolchain)
MinGW-w64 headers for Windows
local/mingw-w64-x86_64-headers-git 5.0.0.4971.4f97ba8e-1
(mingw-w64-x86_64-toolchain)
MinGW-w64 headers for Windows
```
--
Best regards,
LH_Mouse