I haven't had a deep look at the patch, but AFAICS the problem is a simple matter that can be solved by adding `-nostdinc -I"path/to/the/directory/of/new/headers"` to `CPPFLAGS` when building the CRT.
------------------ Best regards, lh_mouse 2016-08-26 ------------------------------------------------------------- 发件人：David Wohlferd <d...@limegreensocks.com> 发送日期：2016-08-23 07:34 收件人：mingw-w64-public 抄送： 主题：Re: [Mingw-w64-public] Building mingw-w64 and include paths Let's try this again. This time the proposed patch is attached which may help. For 'ease of review,' this patch does not include the 'generated' makefile.in files. The problem I am trying to fix is that when building mingw-w64, the compiler will often use headers from the Tools Directories instead of the mingw-w64 source directory. This is due to the fact that while some mingw-w64 SourceDir paths are passed to the compiler, several are not. This causes 3 problems: 1) In order for me to make and test changes to intrin.h (for example), I have to remember to copy it to ToolsDir after every change. 2) Users who want to build mingw-w64 have to *know* that they need to copy certain files (from a variety of locations) to their ToolsDir before trying to build mingw-w64. While the build may succeed without this, the results will be uncertain. 3) Header files that are in ToolsDir are usually treated as 'System Headers' (https://gcc.gnu.org/onlinedocs/cpp/System-Headers.html). Among other things, this means that warnings in these files tend to get suppressed rather than found and fixed. While there are multiple ways to fix this, I have chosen to add the necessary paths to Makefile.am. I also needed to duplicate 2 files (_mingw_directx.h _mingw_ddk.h) into appropriately named directories so that _mingw.h's #include "sdks/_mingw_directx.h" would work (Is there a better way to resolve this? I can't just generate them into the sdks directory, since 'distribution' needs them where they are.). Kai has suggested that we modify the configure script to copy all the header files to a single directory (a la 'make install') and use that single directory instead of the 9 above. My scripting skills are not sufficient to do this. If this is how we want to proceed, someone else will need to write it. dw ------------------------------------------------------------------------------ _______________________________________________ Mingw-w64-public mailing list Mingw-w64-public@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
